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PRODUCT DATA

66-1171-03

R7910A SOLA HC (Hydronic Control)

R7911 SOLA SC (Steam Control)

APPLICATION

The R7910A SOLA HC is a hydronic boiler control system and

the R7911 SOLA SC is a Steam Control system that provide

heat control, flame supervision, circulation pump control, fan

control, boiler control sequencing, and electric ignition

function. It will also provide boiler status and error reporting.

Multiple boilers can be joined together to heat a system

instead of a single, larger burner or boiler. Using boilers in

parallel is more efficient, costs less, reduces emissions,

improves load control, and is more flexible than the traditional

large boiler.

R7910A Hydronic Control shown.

For R7911, “Steam Control” would replace

“Hydronic Control” on label.

SOLA HC/SC System may Consist of:

R7910/R7911 Control Device

S7999B Touchscreen Display—required for setup and ModBus communication but not required for the system to operate once

the R7910A/R7911 is programmed.

S7999C Local Operator Interface, which can setup and monitor the R7910/R7911.

S7910A Local Keyboard Display Module

Flame Rod or UV flame detector (C7027, C7035, or C7044)

Temperature Sensor, NTC Type 10KΩ at 77°F (25°C) or 12KΩ at 77°F (25°C)

Limit Sensor, NTC Type 10KΩ at 77°F (25°C)

Fans (VFD)

R7911 uses a Steam Sensor, 0-15 or 0-150 psi - 4-20mA source type

Summary of content (122 pages)

PAGE 1
R7910A SOLA HC (Hydronic Control) R7911 SOLA SC (Steam Control) PRODUCT DATA APPLICATION The R7910A SOLA HC is a hydronic boiler control system and the R7911 SOLA SC is a Steam Control system that provide heat control, flame supervision, circulation pump control, fan control, boiler control sequencing, and electric ignition function. It will also provide boiler status and error reporting. Multiple boilers can be joined together to heat a system instead of a single, larger burner or boiler.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) FEATURES • Power • Flame • Alarm Safety and Boiler Protection • Flame Sensing • Ultraviolet (C7027, C7035, C7044 Sensors) • Flame Rod • Single Element (Internal spark generator and flame sense using the same element) • Dual Element (separate elements for ignition spark and flame sense) R7910 Hydronic Control • Frost Protection, Slow Start, Anti-condensate, Boiler Delta-T, Stack Limit, Boiler Limit, DHW Limit, Outlet TRise Limit R7911 Steam
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Models Available: Table 1. SOLA HC/SC Models Available.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) TABLE OF CONTENTS Application ......................................................................................................................................................... Features ............................................................................................................................................................. Overview .......................................................................................
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) FEATURES, continued Lockout messages are stored in the R7910/R7911 non-volatile memory (File and lockout remain with power interruption) and Alerts are stored in the volatile memory (file clears on power interruption). Access codes through the display allow for different levels of setup. — The OEM level allows for equipment to operate within guidelines that they feel necessary for safe and efficient operation of their equipment.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Non-Volatile Memory Temperature Settings The R7910A/R7911 will store the following items in non-volatile memory (Information remains in control on power interruption): All parameters that provide a temperature have a possible value of “None.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) • Transformer (for powering R7910/R7911 40va minimum) AT72D (40VA) AT88 (75VA) • R7911 - Pressure Sensor (15 or 150) 4-20mA source type • 50032893 - 001 Bag of connectors Required but purchased outside Honeywell: • Circulating Pumps 24 or 120 Vac • Blower Motor, on/off or VFD 7 66-1171—03
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Connectors for field wiring: May be obtained separately outside Honeywell. See list below. ICP Device Plug # Description Mates with … Manf. Part Number J1 Flame Detection Interface Molex 0050841060 (Shell), 0002081002 (Pin, 14-20 AWG) J2 PWM Combustion Molex Blower Interface 0039012040 (Shell), 0039000059 (Pin, 18-24 AWG) J3 Comm.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) OVERVIEW • Digital inputs for room limit control, high limit control, Air pressure switch, Gas pressure switch, low water cutoff, valve proof of closure switch. Functions provided by the R7910A/R7911 include automatic boiler sequencing, flame supervision, system status indication, firing rate control, load control, CH/DHW control, limit control, system or self-diagnostics and troubleshooting.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Storage/Shipping Temperature: -40°F to 150°F (-40°C to 66°C). • Either ModBus RS485 communication port can be used to allow configuration and status data to be read and written to the R7910/R7911. Support a Master S7999B or a Building Automation master to control the R7910 or R7911 to respond to a single ModBus address to service the requests of the ModBus master in a Lead/Lag arrangement.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) [4] Ø 3/16 (5) MAX [2] 5-19/64 (135) 2-19/32 (66) [2] 8-21/32 (220) 9-21/64 (237) MAX 6-21/64 (161) M27063 Fig. 2. R7910A/R7911 dimensions in in. (mm). * All sensors attached to the R7910 MUST be all 12K or 10K sensors (don't mix and match). Table 2. NTC Sensors (temperature versus resistance). 12K NTC (kOhm)* Beta of 3750 10K NTC (kOhm)* Beta of 3950 -30 (-22) 171.70 176.08 -20 (-4) 98.82 96.81 -10 (14) 58.82 55.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) When Installing This Product… 1. 2. 3. 4. 5. 6. 7. 3. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. Refer to the wiring diagram provided as part of the appliance or refer to Fig. 3. Check the ratings given in the instructions and on the product to make sure that the product is suitable for your application.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Note that the high voltage ignition spark, the high voltage ignition lead and the return path of the current that flows during sparking is an important source of electromagnetic interference. c. Do not route the Flame rod sense lead wire or ground wire near the ignition spark high-voltage cable or other line voltage wiring.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) ICP DEVICE PIN OUT PLUG CONNECTORS BLUE UV FAN POWER (25 VDC) FAN GND PWM OUT TACHOMETER WHITE EGND L2 FOR 120VAC OR 24VAC RETURN (OPTOS) L1 P P P { PUMP B { PUMP C { PUMP A BLOWER/HSI EX.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) ICP DEVICE PIN OUT PLUG CONNECTORS BLUE FAN POWER (25 VDC) FAN GND PWM OUT TACHOMETER UV WHITE EGND L2 FOR 120VAC OR 24VAC RETURN (OPTOS) L1 P P P { PUMP B { PUMP C { PUMP A BLOWER/HSI EX.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 4. Recommended Grounding Practices. Ground Type Recommended Practice Earth ground 1. Earth ground must be capable of conducting enough current to blow the 20A fuse (or breaker) in the event of an internal short circuit. 2. Use wide straps or brackets to provide minimum length, maximum surface area ground conductors. If a leadwire must be used, use 14 AWG copper wire. 3.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 5. R7910A/R7911 Contact. (Continued) Connector Term. J5 1 Function INTERLOCK Description and Rating (All Models) Per Model Input Rating J6 8 ALARM Input 24VAC, 120 VAC: 6.3 ALR, 0.63 Amps full load J6 7 ALARM Output 24VAC, 120 VAC: 6.3 ALR, 0.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 5. R7910A/R7911 Contact. (Continued) Connector Term. Function Description and Rating (All Models) J10 3 TOD/REMOTE RESET COMMON Ground reference for time of day and remote reset inputs J10 4 MODULATION 4 - 20mA (+) (Out) 4 to 20 mA Current modulation signal out into a 600 Ohm J10 5 MODULATION 0 - 10 VDC (+) (Out) 0 to 10 VDC Voltage modulation signal out, 10 mA max.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) STARTUP 3. OEM Range PCB—limits the range of any parameter. A parameter control block can be downloaded using a filetransfer method that operates within the Modbus protocol. The R7910A/R7911 Modbus (see form 65-0310) defines the format of parameter control block data and the download procedure. All of the OEM PCBs require the OEM password before they can be downloaded.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) one or more of the items in the list. If a parameter is not listed in this PCB, then it is restricted by the factory installed limits. 3. WARNING Explosion Hazard. Improper configuration can cause fuel buildup and explosion. Improper user operation may result in property loss, physical injury, or death. 4.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 8. System Operation Settings. (Continued) Parameter Comment Warm Weather Shutdown Temperature, None Setpoint Lead Lag slave enable Enable, Disable (R7910 only) Lead Lag Master enable Enable, Disable (R7910 only) DHW priority vs LL DHW priority vs CH These parameters determine the priority of DHW versus other sources of calls-for-heat, when more than one source is enabled.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 9. General Configuration Settings. Parameter Comment Temperature Units F, C This parameter determines whether the temperature is represented in units of Fahrenheit or Celsius degrees. Anti short cycle time mm:ss Whenever the burner is turned off due to no demand, the anti short cycle timer is started and the burner remains in a Standby Delay condition waiting for this time to expire.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Demand and Rate speed. The chosen fan speed for calibrating these scalers is 5000 RPM, that is, when both the MCBA and the R7910A have a maximum fan speed of 5000 RPM, the user-programmable P, I, and D gains used by the MCBA can be directly copied to the corresponding R7910A parameters, and the behavior of the R7910A control will then be similar to the MCBA.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) CH ENABLE DHW ENABLE FUTURE MIX ENABLE LL SLAVE ENABLE PRIORITY: CH <>DWH LL<>DHW DHW PRIORITY OVERRIDE TIME DHW ENABLE DHW STORAGE TIMER SLAVE COMMAND EXISTS CH HEAT DEMAND RELOAD DHW HEAT DEMAND RELOAD DHW PRIORITY (EnviraCOM) T DHW DEMAND PRIORITY TIMER DHW DEMAND (EnviraCOM) SENSOR T CH FROST PROTECT BURNER DEMAND DHW FROST PROTECT BURNER DEMAND PARAMETER “pRATE” = 0 TO 99.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) The burner demand priority control block implements a priority scheme according to the descriptions of the parameters shown as providing input to this block. The implementation is: DETERMINE IF DHW DEMAND SHOULD IGNORE AN ANTI SHORT CYCLE (ASC) DELAY... M24972A Fig. 7. Burner demand priority control. CH Hydronic Loop Demand and Rate is above the setpoint plus a hysteresis value, or until the other selected demand source input (e.g.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) The Hydronic Central Heating function is implemented as shown in Fig. 8. INPUT SENSOR CH DEMAND SWITCH CENTRAL HEATING ( CH) “pRATE” = 0 TO 99.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 10. Central Heating Hydronic Parameters. (Continued) Parameter Comment CH setpoint Degrees or None This setpoint is used when the time-of-day input is off. If the ODR function is inactive, the setpoint is used as-is. If the ODR function is active (input on J10-2), this setpoint provides one coordinate for the outdoor reset curve, as described in “Outdoor Reset and Boost” on page 27.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) setpoint is used. If TOD is on, the CH TOD setpoint provides the Y coordinate and the and the lower-left point is recalculated to shift the graph in a parallel way. • For outdoor temperatures higher than the maximum, the minimum water temperature is used. • For outdoor temperatures between the minimum and the maximum, a linear interpolation is used to find the setpoint.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) However, if the first boost event has not yet occurred, then the new setpoint is adopted immediately. In either case, the boost timer—which began when the demand started and continues to measure the boost time interval—is not reset when TOD changes state.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) STEAM ONLY PARAMETER CH DEMAND SWITCH STEAM HEATING (CH) PARAMETER STAT EnviraCOM REMOTE STAT INPUT OUTPUT “pRATE” = 0 TO 99.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 12. Central Heating Steam Parameters. (Continued) Parameter Comment Steam pressure setpoint PSI or None This setpoint is used when the time-of-day input is off. Steam time-of-day pressure setpoint PSI or None This setpoint is used when the time-of-day input (J10 terminal 2) is on.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Setpoint and Hysteresis (Steam Control) Whenever the burner turns off, the turn-on threshold is lowered by doubling the on hysteresis, and then increasing it by 2 degrees F per step until it reaches its original value. The Steam and LL master each have similar setpoint and hysteresis functions. The parameters for each are separate and independent. The time of each step is provided by the hysteresis step time parameter.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) STEAM PARAMETERS OFF HYST. SETPOINT TOD SETPOINT ON HYST. SETPOINT AND HYSTERESIS STEP 1 STEP 2 STEP 3 STEP 4 STEP 5 SETPOINT + OFF HYSTERESIS 1 MINUTE SETPOINT SETPOINT - ON HYSTERESIS 1 MINUTE 2 PSI (.2 PSI FOR 0-15 PSI) SETPOINT - 2 * ON HYSTERESIS BURNER ON OFF ANTI-SHORT-CYCLE DELAY SYSTEM PARAMETER ANTI SHORT CYCLE DELAY TIME M27611A Fig. 13. Steam Setpoint and hysteresis.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) DHW Loop Demand and Rate (Hydronic only) is above the setpoint plus a hysteresis value, or until the other selected demand source input (i.e. Remote Stat or DHW Switch), if any, turns off. The Domestic Hot Water (DHW) Demand and Rate source compares a sensor to a setpoint. Pump demand may be driven by the a remote stat, or by the sensor alone.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 13. Domestic Hot Water Parameters. Parameter Comment DHW demand switch DHW Sensor Only, DHW Switch, Auto-Sensor Only, EnviraCOM DHW Request, STAT, Auto and EnviraCOM DHW, Plate Heat Exchanger, J7-3 120 Vac This parameter selects the source of demand for the DHW system. • If Sensor Only is selected, the burner on/off hysteresis levels also provide “pump demand” or heat demand; there is no other switch-like input.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 13. Domestic Hot Water Parameters. (Continued) Parameter DHW modulation sensor Comment Inlet (S1), Outlet (S3S4), DHW (S6S7), Auto DHW (S6) or Inlet(S1), Auto DHW (S6) or Outlet This parameter selects the source of modulation control for the DHW system. If the selected input is not a temperature (e.g. S1 is steam pressure for a steam control) then an alert occurs and the DHW control subsystem is suspended.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) DHW MODULATION SENSOR WHENEVER SET CHANGES FROM OFF TO ON, TAP OUTPUT IS TRUE FOR AT LEAST THE TAP DHW TAP DETECT MINIMUM ON TIME TRUE WHILE DHW IS DROPPING FASTER THAN TIMER TAP DETECT DEGREES PER SECOND DHW SELECT TOD SET LOAD TAP DEMAND ENDS WHEN: •TIME IS EXPIRED, AND •SET IS FALSE, AND •CLR IS TRUE IF FORCE IS ON, TREAT AS IF SET HAD JUST CHANGED FROM OFF TO ON.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 14. Plate Heat Exchanger Parameters. (Continued) Parameter Comment Tap detect minimum on time hr:mm:ss or None Once a tap detect event has occurred, and the Tap demand block is Set, it remains true for at least the time provided by this parameter. If DHW loses control due to priority, the timer is restarted, so that when Tap demand again gains control of the burner it remains in this condition for the full minimum on time.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 15. Preheat Demand Parameters. (Continued) Parameter Comment Plate preheat on hysteresis Degrees or None The preheat on threshold is calculated as: TON = Plate preheat setpoint - Plate preheat on hysteresis If the preheat block is False, then it is Set (becomes True) when: 1. Tap demand is false, AND 2. The preheat delay-after-tap time has elapsed, AND 3. DHW sensor temperature <= TON, AND 4.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) DHW STORAGE DHW STORAGE ENABLE DHW STORAGE PRIORITY=DHW STORAGE PUMP DEMAND STORAGE ON HIST. STORAGE OFF HIST.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) DHW Storage Operation storage time has expired then DHW storage demand ends and does not recur until a normal DHW demand has recurred and ends. The DHW setpoint and hysteresis are used in the same way as existing setpoints and hysteresis values. This includes use of the DHW hysteresis step time behavior, which modifies the burner on/off thresholds over time.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 18. CH Frost Protection Parameters.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 19. DHW Frost Protection Parameters. Parameter Comment DHW frost protection enable Enable, Disable The DHW frost protection feature is enabled or disabled by this parameter. See Fig. 18. DHW frost protection will use the DHW sensor, if the DHW demand source parameter selects a switch instead of a sensor.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Rate Limits and Override So the rate limit priority scheme uses the following steps, where “active” means that the rate override is both enabled and requesting its rate: The Limit and Override subsystem consists of three separate concepts: 1. • Safety limit functions that cause a burner control to lockout or recycle if safety-critical limits are reached.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 20. Delta-T Limit Parameters. (Continued) Parameter Comment Delta-T inlet/exch degrees Degrees, none Delta-T exch/outlet degrees Degrees, none This is the temperature at which a Delta-T response occurs, measured as the signed value (hi-lo) if the result is negative then it is treated as zero (inversion detection may be enabled to handle this, but that is a different function which does not use this parameter).
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 21. T-Rise Parameters. (Continued) Parameter Comment T-Rise degrees per second limit Degrees or None For any input that has T-rise detection enabled, this parameter provides the maximum rate of temperature increase that will be allowed. If the temperature increases at a rate greater than this, and this rate of increase persists for 4 seconds then the response specified by T-rise response occurs.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Stack limit (Safety limit and Rate limit) Table 23. Limits and Rate Override: Stack Limit Parameters. Parameter Comment Stack limit enable Disable, Enable, Enable single-non-safety This parameter enables or disables the entire stack temperature limit function. Disable turns off the Limit function. Enable turns on the Limit function and requires a 10k dual safety NTC sensor.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Thus there are 5 steps in the modulation limiting: step 0: unlimited (max is 100%) step 1: max is 80% of range step 2: max is 60% of range step 3: max is 40% of range step 4: max is 20% of range step 5: limited to minimum modulation rate STEPPED MODULATION RATE LIMITING LIMITED MODULATION STEP MAXIMUM MODULATION 0 RATE (NO LIMIT) If the monitored temperature is not within 12°F of the limit, then no rate limiting occurs.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Slow Start and Forced Rate limits (Hydronic Control) The Forced Rate limit causes the burner to stay at a fixed firing rate immediately after lightoff, just after the end of the Run Stabilization time (if any). This is optionally followed by a slow start function that limits the ramp-up speed of the firing rate when the water is colder than a threshold, as shown in the following diagram. IGNITION PFEP/MFEP/DBI RUN RUN STAB.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 25. Limits and Rate Override: Slow Start Limit Parameters. (Continued) Parameter Comment CH slow start enable Enable, Disable This parameter enables or disables the slow start limit function for CH and LL demand sources. It uses the CH forced rate parameter as the starting point for the slow start.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Anticondensation (Hydronic Control) The pump corresponding to that source will usually be on; however, to warm the heat exchanger more quickly, that pump may be forced off when anticondensation is active. The anticondensation function reduces condensation effects when the temperature is below a threshold by increasing the firing rate and optionally shutting off the pump.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 28. Modulation Output Parameters. Parameter Comment Modulation output Fan Speed, 4-20mA, 0-10V This parameter selects the type of modulation output. The R7910A software responds by driving the appropriate circuit to provide modulation of firing rate. This parameter also affects the interpretation or the type of all parameters which specify rates.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 29. Fan Speed Modulation Parameters. (Continued) Parameter Comment PWM frequency 1000Hz, 2000Hz, 3000Hz, 4000Hz, This parameter provides the frequency used by the PWM output to control the fan. Pulses per revolution 0-10 Typically is the number of sensors that the fan contains. Fan gain up 0-100 This is the gain for speeding up the fan. Fan gain down 0-100 This is the gain for slowing down the fan.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) PUMP CONTROL The pump names are: • Boiler • CH • DHW • Aux1 • Aux2 • System There are six identical pump control blocks. Each has a different name but are entirely equal in features and capabilities. For example, if the block named CH Pump were configured to control the DHW pump and vice versa, and the pumps were hooked up that way, both pumps would work normally. Each can be configured for any purpose without regard to the pump name.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) • Force On conditions: These bits enable or disable reasons why the pump may be forced on. A force on condition flows to the “Force On” connection to the pump output block, and is not inhibited by Force Off. Fig. 22 shows how a pump control block works when connected to a pump output. The Pump On Options determine the sources that normally turn the pump on. These may be modified by an optional Start Delay and an optional Overrun Time.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 31. Pump Control Block Parameters. (Continued) Parameter Comment XX pump start delay mm:ss When the pump demand changes from off to on, this delay time is used to delay the start of the pump. The pump then starts after the delay expires, assuming that the demand is still present. A delay time of zero disables the delay.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) The Burner Control Uses: monitoring temperature. If burner demand exists, then the burner control will attempt to light the burner and if this succeeds, release control to the modulation source. However if a hold condition exists, then the burner control will remain in the hold condition until that condition reverts to normal. The equipment setup will define the response to demand signals.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 33. Burner Control Safety Parameters. Parameter Comment NTC sensor type 10K dual safety, 12K single non-safety, 10K single non-safety This parameter determines whether 10K or 12K sensors are used for the Inlet, Outlet, DHW header, Stack, and Outdoor analog sensor inputs. R7911 Steam Control has Stack sensor option only.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 33. Burner Control Safety Parameters. (Continued) Parameter Comment Purge rate proving None, High Fire Switch, Fan Speed This parameter determines the input used to confirm the purge rate has been reached. It is unused and ignored if the Prepurge time is set to zero. If set to None, the purge rate is commanded during prepurge but purge timing begins immediately without waiting for any feedback.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) IGNITER MAY BE ON THROUGHOUT PFEP, OR ONLY DURING FIRST HALF. IGNITER PILOT FLAME REQUIRED.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 33. Burner Control Safety Parameters. (Continued) Parameter Comment Main flame establishing period (MFEP) 5, 10, or 15 Seconds This parameter only appears if Pilot type is Interrupted. Three choices of the MFEP time are provided: 5, 10, or 15 seconds. Flame must remain on throughout the MFEP, otherwise a response occurs (see “MFEP flame failure response” on page 61).
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 33. Burner Control Safety Parameters. (Continued) Parameter Postpurge time Comment 0 seconds to 5 minutes (MM:SS) This parameter sets the burner control’s postpurge time. Setting this parameter to zero disables postpurge.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) TERMINAL TABLE A1 A2 LCI A3 A4 A5 ILK A6 PII A7 A8 ICP J6 TERMINAL 2 J6 TERMINAL 1 J6 TERMINAL 3 J7 TERMINAL 6 J7 TERMINAL 5 J7 TERMINAL 4 J5 TERMINAL 1 J7 TERMINAL 3 J6 TERMINAL 5 J7 TERMINAL 2 J7 TERMINAL 1 ANNUNCIATOR NAMES L1 MASTER SWITCH STACK VENT WATER LEVEL HIGH GAS PRESSURE A1 MASTER SWITCH A2 WATER LEVEL LCI LIMIT CONTROL A3 STACK VENT FAN A4 HIGH GAS PRESSURE A5 LOW GAS PRESSURE ILK AIRFLOW SWITCH A6 UPSTREAM
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) FAULT HANDLING • Alerts never require manual intervention to reset them; that is, if the alert clears up, then normal operation will continue. An alert is not a condition, it is an event. The cause of the alert may be a condition, e.g. something that is causing an abnormal hold, but the alert itself in this case is a momentary event generated upon entry to that condition.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) BURNER CONTROL OPERATION Safety Shutdown of Burner Control Functions Safety Shutdown (Lockout) occurs if any of the following occur during the indicated period: 1. 2. 3. 4. 5. 6. 7. 8. INITIATE Period: a. A/C line power errors occurred. b. Four minute INITIATE period has been exceeded. STANDBY Period: a. Flame signal is present after 240 seconds. b. Preignition Interlock is open an accumulative time of 30 seconds. c.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Central Heating 8. Start-up sequence central heating request (system in standby): 1. Heat request detected (On Setpoint - On Hysteresis). 2. The CH pump is switched on. 3. After a system Safe Start Check, the Blower (fan) is switched on after a dynamic ILK switch test (if enabled). 4. After the ILK switch is closed and the purge rate proving fan RPM is achieved (or High Fire Switch is closed) prepurge time is started. 5.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Preliminary Inspection CAUTION Perform the following inspections to avoid common problems. Make certain that: 1. Wiring connections are correct and all screws are tight. 2. Flame detector(s) is clean, installed and positioned properly. Consult the applicable Instructions. 3. Combination connector J1 wiring and flame detector(s) are correctly used. See product data sheet for wiring. 4.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) 8. 9. c. On connector J5, jumper power to the ignition terminal J5 terminal 4. Disconnect the leadwire to the pilot valve if it is connected to the same terminal. d. Close the master switch to energize only the ignition transformer. e. If the ignition spark is not strong and continuous, open the master switch and adjust the ignition electrode spark gap setting to the manufacturer’s recommendation. f.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Open the master switch. Complete the normal ready-to-fire checkout of the fuel supply and equipment as recommended by the equipment manufacturer. Close all manual main fuel shutoff valve(s). Check that the automatic fuel valve(s) is closed. Make sure fuel is not entering the combustion chamber.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) 15. NOTE: Low fuel pressure limits, if used, could be open. If so, bypass them with jumpers during this test. 1. 2. 3. 4. 5. — — — — — 6. Open the master switch. Close the manual main fuel shutoff valve(s). Connect a manometer (or pressure gauge) to measure pilot gas pressure during the turndown test. Open the manual pilot shutoff valve(s). Close the master switch Go to the S7999 Operator Interface Module.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) g. Select the Verify button. h. Select Begin. i. Follow the prompts on the Operator Interface. FOR PILOT SYSTEMS a. Using the S7999 Operator Interface Module, select the Configure button (lower left corner of the Status page). b. Using the left scroll down function, scroll down to select the System Configuration Parameter page (you will need to be logged in with a password). c. Select Flame Sensor Type parameter. d.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) SAFETY SHUTDOWN TESTS (ALL INSTALLATIONS) f. Perform these tests at the end of Checkout, after all other tests are completed. If used, the external alarm should turn on. Press the RESET pushbutton on the R7910 or R7911 SOLA Module to restart the system. 1. 2. 3. 4. 5. 6. 7. Open a Pre-Ignition Interlock (if PII parameter is enabled) during the STANDBY or PREPURGE period. a.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) energized, but if no voltage is detected at the terminal, the LED will be red. Actual analog I/O values are displayed on the operator interface module. The LL master PID operates using a percent rate: 0% is a request for no heat at all, and 100% means firing at the maximum modulation rate.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Add-stage method, Add-stage detection timing, Add-stage request Next stage The SOLA that will or might be added as the next SOLA to fire. Last stage The SOLA that is firing and that was added the most recently to the group of slaves that are firing. Typically this is also the modulating stage, however as the load decreases then the last-added stage will be at its minimum rate and the previous stage will be modulating.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) S7999B AS LOCAL DISPLAY COM1 120 VAC L1 L2 MEAN WELL S-25-12 POWER SUPPLY NEUTRAL (L2) N 120VAC (L1) L COM2 1 2 3 4 5 6 7 8 9 +12 +12 GND (C) (B) (A) N/C N/C (A) (B) EARTH GROUND 12 DC OUT + V+ DC OUT (COMMON GND) V- 2 VADJ A B C A MB1 WIRING KEY 1 DO NOT CONNECT THE S7999B TO TERMINALS 1 2 3. THIS WILL RENDER THE DISPLAY INOPERABLE. 2 DISPLAY CAN ALSO BE CONNECTED TO MB2; A, B, C.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) 2. 3. 4. 5. (1) As load increases: (a)Until all stages are firing - No stage is requested to exceed the common base load rate. (b)After all stages are firing - There is no restriction on the slave's commanded firing rate. (2) As load decreases: (a)As long as all available stages are firing There is no restriction on the slave's commanded firing rate.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Slave Operation and Setup System Display Configuration The following parameters are available for OEM configuration and may be adjusted through a System Display or programmed at the OEM production facility. Slave Data Supporting Lead Lag This data is provided by each slave SOLA control to support operation when a LL master exists. Fig. 29 summarizes the slave's registers and data: Table 35.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) MASTER SLAVE DATA EnviraCOM MASTER COMPATIBILITY STAT INPUTS STAT2 TOD SLAVE CONTROL READ SLAVE CONTPOL (0X2400) SLAVE CONTROL WRITE SLAVE COMMAND DEMAND SUSPEND FIRING RATE OFF CYCLE FAN PUMP X, Y, AND Z TO BURNER CONTROL TO FAN CONTROL T MASTER SERVICE STATUS SLAVE STATUS MODULATION pRATE OUTLET TEMPERATURE SLAVE COMPATIBILITY SLAVES HAVE DEMAND SLAVES ARE FIRING MASTER’S HEAT DEMAND CH DHW CH FROST DHWFROST MASTER
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 36. Slave Data Supporting Lead Lag Parameters. (Continued) Parameter Comment LL - Slave priority sequence order 0-255 Slave sequence order is used to determine the order in which the slave Solas will be used (staged on) for those Solas with the same Slave mode setting. Numbers may be skipped, that is 3 will be first if there is no 1 or 2.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Periodic Data Polling Messages A polled SOLA is read to determine the values of the following data items: a. The slave's type (compatibility) as indicated by the LL - Slave type b. The slave enable status LL - Slave enable c. The slave mode as set in LL - Slave mode d. The slave sequence order as set in LL - Slave sequence order e. LL - Demand-to-firing delay: mm:ss or None See Table 38. f. CT - Burner run time. See Table 38.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) OnLeave A slave in the OnLeave state remains that way until the ProcessSlaveStatus moves it to some other state. Disabled A slave in the Disabled state remains that way until the ProcessSlaveStatus moves it to Recovering. Demand and Priority LL MASTER DEMAND SOURCES CENTRAL HEAT LL CH DEMAND SWITCH MASTER HEAT DEMANDS THE SOURCES ASKING FOR HEAT. USED FOR PUMP CONTROL.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 40. Warm Weather Shutdown (WW-SD) Parameters. (Continued) Parameter Comment Warm weather shutdown setpoint Temperature or None When warm weather shutdown is Disabled then it has no effect (i.e. the Warm Weather Shutdown (WW-SD)) status shown on the priority diagram is false). These two parameters are shared by the stand-alone SOLA control and the LL master and have the same effect for either control.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Modulation HEADER ModBus LL MODULATION TEMPERATURE MASTER SERVICE STATUS ALL SLAVES KNOW WHAT THE MASTER IS DOING.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Setpoints Table 42. Setpoint Parameters. Parameter LL CH Setpoint source Comment Local, S2 4-20mA If the setpoint source is Local then the SOLA control's local setpoint system is used. This setting enables the normal use of the CH setpoint, CH TOD setpoint, and the CH outdoor reset parameters and functions. If the setpoint source is S2 4-20mA then the setpoint is determined by the 4-20mA input on S2, and the two parameters described below.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) • All stages are at their maximum (base load, or max modulation) and one or more stages are rate-limited (such as due to slow-start or stepped modulation limiting due to high stack temperature, etc.) and the rate limited stage recovers, changing from rate-limited to free to modulate.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 44. Rate Allocation Parameters. Parameter Comment LL - Base load common 0-100% If set to zero, this parameter is disabled. For any non-zero value, it uses the individual base load rates of each slave to be ignored by the LL master's routines and this common value to be used instead. It is an easy way to set all base loads to the same value, without having to set each slave.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 45. Stager Parameters. Parameter Comment LL - Add-stage interstage delay mm:ss This specifies the minimum time that the Stager waits after adding one stage before adding another stage or dropping a stage. LL -Drop-stage interstage delay mm:ss This parameter specifies the minimum time that the Stager waits after dropping one stage before dropping another stage or adding a stage.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 47. Dropping Stages Parameters. (Continued) Parameter Comment LL - Drop-stage error threshold degrees This provides the error threshold as defined by the methods below. LL - Drop-stage rate offset -100% to +100% This provides the rate offset threshold as defined by the methods below. Drop-stage Methods rate offset = 0% The Drop-stage condition will occur when the last stage is at the minimum modulation rate.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) SLAVE MODE: USE FIRST, EQUALIZE RUNTIME, USE LAST • If set to Use First, then this slave SOLA will be used prior to using other slave Solas with other values. • If this parameter is set to Equalize Runtime, then this slave SOLA will be staged according to a run time equalization. (Any Solas set to Use First will precede any that are set to Equalize Runtime.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Sequencer Drop Lag Boiler Selection Sequencer 1 Minute Event When the stager asks the sequencer for a lag boiler to drop the sequencer looks at the StagingOrder numbers of all Firing boilers. If only one Firing boiler is found, or none are found, then this selection function returns a value that indicates no boiler may be dropped. Otherwise it returns an identifier for the boiler having the highest StagingOrder number.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) APPENDIX A: PARAMETER GLOSSARY R7910A parameter glossary can be found in Table 49. Table 49. Parameter Glossary. Parameter Name Short Description Ref.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Annunciator mode Short Description The annunciator may be fixed, in which the labels and locations of the inputs is preassigned, or programmable in which these things may be altered. Ref. Page 62 Annunciator 1 short The short (3 letter) name of the contacts monitored by the A1 annunciator input.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Short Description Ref. Page CH enable This parameter determines whether the CH loop is enabled or disabled. It may be disabled 20 to turn it off temporarily, or because the application does not use this feature. CH forced rate For CH demand, if the CH forced rate time is non-zero, then the firing rate will be held at the 49 rate specified here during that time.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Short Description Ref. Page CH slow start enable This parameter enables or disables the slow start limit function for CH (or LL slave) demand. 50 CH TOD setpoint This Setpoint is used when the time-of-day input is on. If the ODR function is active, this Setpoint provides one coordinate for the shifted (because TOD is on) outdoor reset curve, as described for the CH Outdoor Reset parameter.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Short Description Ref. Page DHW high limit response If Recycle && hold is selected, the burner control recycles and waits for the DHW 50 temperature to fall. It will remain in this holding condition until the DHW temperature is lower than the DHW high limit temperature minus 5 degrees F.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Exchanger T-Rise enable Short Description This enables/disables temperature rise detection for the heat exchanger sensor S9 (J9 terminal 6). Ref. Page 46 Fan during off cycle If this parameter is non-zero for a control that is enabled as a LL slave, then it provides the rate modulation rate (e.g.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name ILK bounce detection enable Short Description Enable, Disable Ref. Page 58 ILK long name The long name (up to 20 characters) of the ILK annunciator input. 62 ILK short name The short (3 letter) name of the contacts monitored by the ILK annunciator input. 62 Inlet Connector Type Designates the sensor type connected to the control for proper reading.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Short Description Ref. Page LL - Slave write This allows the slave to accept command messages from a SOLA master. 78 Manual firing rate This parameter specifies the analog output or fan speed during burner modulation, when the Firing rate control parameter specifies Manual mode. 52 MFEP This parameter provides choices for the duration of the MFEP (main flame establishing period) time.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Short Description Ref. Page Plate preheat off hysteresis The preheat off threshold is calculated as: TOFF = Plate preheat setpoint + Plate preheat off hysteresis If the preheat block is True, then it becomes False when: • Tap during Preheat is recognized (see below) OR • Both • DHW sensor temperature >= TOFF, AND • The preheat minimum on time has elapsed.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Short Description Ref. Page Speed up ramp Whenever the burner is firing it will be commanded to increase its RPM no faster than the rate provided by this parameter. 53 Stack Connector Type Designates the Sensor type connected to the control for proper reading. 21 Stack limit delay This parameter provides the delay time for the Stack limit.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 49. Parameter Glossary. Parameter Name Short Description Ref. Page Tap detect on hysteresis 37 The second tap demand “set” criteria depends on the value of the DHW sensor.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) APPENDIX B: HYDRONIC DEVICE PARAMETER WORKSHEET EXAMPLE Table 50 is an example of a completed parameter worksheet. Table 50. Example of a Completed Device Parameter Worksheet.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 50. Example of a Completed Device Parameter Worksheet.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 50. Example of a Completed Device Parameter Worksheet.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 50. Example of a Completed Device Parameter Worksheet.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 50. Example of a Completed Device Parameter Worksheet.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes. Code Description Recommended Troubleshooting of Lockout Codes NOTE Safety Data Faults L 1 Unconfigured safety data 1. New Device, complete device configuration and safety verification. 2. If fault repeats, replace module. 2 Waiting for safety data verification L 1. Device in Configuration mode and safety parameters need verification and a device needs reset to complete verification. 2.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes. (Continued) Code Description Recommended Troubleshooting of Lockout Codes Internal Fault. 1. Reset Module. 2. If fault repeats, replace module.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes. (Continued) Code Description Recommended Troubleshooting of Lockout Codes NOTE 50 Modulation fault 51 Pump fault Internal sub-system fault. 1. Review alert messages for possible trends. 2. Correct possible problems. 3. If fault persists, replace module. H 52 Motor tachometer fault 53 AC inputs phase reversed 1. Check the Module and display connections. 2.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes. (Continued) Code Description Recommended Troubleshooting of Lockout Codes NOTE 80 DHW high limit 1. Check wiring and correct any possible errors. 2. Replace the DHW high limit. 3. If previous steps are correct and fault persists, replace the module. H or L 81 Delta T limit 1. Check Inlet and Outlet sensors and pump circuits for proper operation. 2.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes. (Continued) Code 101-104 Description Recommended Troubleshooting of Lockout Codes NOTE RESERVED Flame Operation Faults 105 Flame detected out of sequence H or L 1. Check that flame is not present in the combustion chamber. Correct any errors. 2. Make sure that the flame detector is wired to the correct terminal. 3. Make sure the F & G wires are protected from stray noise pickup. 4.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes. (Continued) Code Description Recommended Troubleshooting of Lockout Codes NOTE 136 Interrupted Airflow Switch failed to close H 1. Check wiring and correct any possible wiring errors. 2. Check Interrupted Airflow switch(es) to assure proper function. 3. Verify voltage through the airflow switch to the IAS input with a voltmeter. 4.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes. (Continued) Code Description 156 Combustion pressure and Flame ON 157 Combustion pressure and Flame OFF 158 Main valve ON 159 Main valve OFF 160 Ignition ON 161 Ignition OFF 162 Pilot valve ON 163 Pilot valve OFF 164 Block intake ON 165 Block intake OFF 166-171 RESERVED Recommended Troubleshooting of Lockout Codes NOTE H or L OEM Specific 1.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes. (Continued) Code Description 194 Invalid ignite failure response setting 195 Invalid ignite failure retries setting Recommended Troubleshooting of Lockout Codes 1. Return to Configuration mode and recheck selected parameters, reverify and reset module. 2. If fault repeats, verify electrical grounding. 3. If fault repeats, replace module.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 51. R7910A Lockout and Hold Codes.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 52. Alerts. (Continued) Code 46 Table 52. Alerts. (Continued) Description Code Description Low line frequency occurred 89 RESERVED 47 Invalid subsystem reset request occurred 90 Modulation output type was invalid 48 Write large enumerated Modbus register value 91 Firing rate control parameter was invalid 49 Maximum cycle count was reached 92 Forced rate was out of range vs.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 52. Alerts. (Continued) Table 52. Alerts.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 52. Alerts. (Continued) Code 209 Table 52. Alerts.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 52. Alerts. (Continued) Code Table 52. Alerts.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 52. Alerts. (Continued) Table 52. Alerts.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Table 52. Alerts. (Continued) Code Table 52. Alerts.
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R7910A SOLA HC (HYDRONIC CONTROL) R7911 SOLA SC (STEAM CONTROL) Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Toronto, Ontario M1V 4Z9 customer.honeywell.com ® U.S. Registered Trademark © 2009 Honeywell International Inc. 66-1171—03 M.S. Rev. 11-09 Printed in U.S.A.