Installation, use and maintenance manual GAHP Line W and W LB Series Absorption heat pump for heating and cooling medium-large areas Fired by natural gas fired/LPG and renewable energy
GAHP-W – Installation, start-up, use and maintenance manual EDITION: 2014-08 CODE: D-LBR367 This manual was written and printed by Robur Corporation; part or total reproduction of this manual is prohibited. The original is filed in Robur Corporation. Any use of this manual other than for personal consultation must be previously authorized by Robur Corporation. The rights of those who have legitimately filed the registered trademarks contained within this publication are not affected.
Index TABLE OF CONTENTS SECTION 1 WARNINGS ...................................................................................................3 SECTION 2 OVERVIEW AND TECHNICAL SPECIFICATIONS .......................................7 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.
GAHP-W – Installation, start-up, use and maintenance manual PREFACE This manual supplies information for the installation, operation and servicing of the Robur Water-Water Gas Absorption Heat Pump GAHP-W and the Robur Water-Water Gas Absorption Heat Pump GAHP-W LB. It is strongly recommended that this manual be completely reviewed before proceeding with an installation.
Warnings SECTION 1 WARNINGS This manual is designed to be an installation and user’s guide for the Robur GAHPW, Gas Absorption Heat Pumps series.This product must be installed, started up and serviced by a qualified installer. Improper installation and/or operation could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death. Improper installation and/or operation will void the warranty.
GAHP-W – Installation, start-up, use and maintenance manual manufacturer does not accept any contractual or extra-contractual liability for any damage caused by improper use of the appliance. The appliance is not intended to be used by persons (including children) whose physical, sensory and mental capacities are impaired, or who lack the necessary experience and knowledge, unless they are supervised or instructed in its use by persons responsible for their safety.
Warnings FIRE HAZARD The appliance contains hot parts. Do not open the appliance or touch the flue outlet pipe. If necessary, contact a qualified service company. The appliance has a sealed circuit classified as pressure equipment, i.e. with internal pressure higher than atmospheric pressure. The fluids contained in the sealed circuits are harmful if swallowed or inhaled, or if they come into contact with the skin. Do not carry out any operation on the sealed circuit or its valves.
GAHP-W – Installation, start-up, use and maintenance manual 6 Edition: 2014-08
Overview and technical specifacions SECTION 2 OVERVIEW AND TECHNICAL SPECIFICATIONS This manual supplies information for the installation, operation and servicing of the Robur Water-Water Gas Absorption Heat Pump GAHP-W and the Robur Water-Water Gas Absorption Heat Pump GAHP-W LB. Read this manual carefully before installation.
GAHP-W – Installation, start-up, use and maintenance manual 2.1 GAHP-W – TECHNICAL SPECIFICATIONS GAHP-W GAHP-W LB °F °F kBtu/h % kBtu/h % GPM °F Ft (WC) PSIg GPM °F kPa PSIg 50 122 132.4 139 54.6 57 14.5 18 12.7 5.51 12.3 9 12.7 5.51 32 122 119.4 125 46.1 48 13.2 18 10.5 4.50 11.0 9 15.4 6.67 GPM °F °F GPM 10.1/20.7 113.0 37.4 8.8/17.6 113.0 23.
Overview and technical specifacions GAHP-W – HEATING AND CHILLING CAPACITIES GAHP-W HEATING CAPACITY - kBtu/hr HOT WATER INLET TEMPERATURE CHILLED WATER INLET TEMPERATURE 77.0 46.4 142.4 140.0 136.0 129.0 121.5 117.7 50.0 142.6 140.9 138.2 132.4 125.3 121.3 53.6 142.6 141.4 139.6 134.9 128.8 124.8 59.0 142.6 141.6 140.5 137.6 133.3 129.4 68.0 142.6 141.6 140.7 139.5 137.7 134.7 77.0 142.6 141.6 140.7 139.7 138.8 137.0 86.0 142.6 141.6 140.7 139.7 138.8 137.
GAHP-W – Installation, start-up, use and maintenance manual GAHP-W LB – HEATING AND CHILLING CAPACITIES GAHP-W LB HEATING CAPACITY - kBtu/hr HOT WATER INLET TEMPERATURE CHILLED WATER INLET TEMPERATURE 77.0 32 132.7 129.7 125.2 119.4 112.0 112.0 41 133.7 131.7 129.0 124.6 117.5 117.5 50 133.8 133.1 131.3 128.4 122.8 122.8 59 133.8 133.7 132.6 131.0 127.4 127.4 68 133.8 133.8 133.2 132.4 130.7 130.7 77 133.8 133.8 133.5 132.9 132.5 132.5 Table 5 - 86.0 95.
Overview and technical specifacions GAHP-W - Chilling mode ∆P Hot water flow 37.4 °F ∆P ft of Head 6.60 4.26 7.71 5.34 8.81 6.70 9.91 8.35 11.01 10.25 12.11 12.40 13.21 14.78 14.31 17.37 15.41 20.15 16.51 23.11 17.61 26.23 18.71 29.49 19.81 32.88 20.91 36.38 22.01 39.97 - GAHP-W pressure drop – chilling mode. GPM Table 8 Outlet water temperature 46.4 °F 55.4 °F ∆P ft of Head 3.98 5.12 6.50 8.11 9.94 11.99 14.23 16.66 19.27 22.06 25.01 28.11 31.35 34.72 38.22 ∆P ft of Head 3.88 4.93 6.22 7.73 9.
GAHP-W – Installation, start-up, use and maintenance manual GAHP-W PRESSURE DROP – CHILLING MODE 39.00 ∆P – FEET OF HEAD 33.00 27.00 21.00 15.00 37.4°F Outlet 46.4°F Outlet 9.00 55.4°F Outlet 3.00 6.00 9.00 12.00 15.00 18.00 21.00 WATER FLOW - GPM Graph 2 - GAHP-W pressure drop – chilling mode (see on page 62). ∆P – FEET OF HEAD GAHP-W LB PRESSURE DROP – CHILLING MODE 28.00 22.00 16.00 23.0°F Outlet 10.00 32.0°F Outlet 41.0°F Outlet 4.00 6.00 9.00 12.00 15.00 18.
Overview and technical specifacions 2.3 LOCATION OF THE APPLIANCE Make sure the GAHP heat pump does not have any transport damage. Check: - the packaging - the unit panels Immediately upon delivery advise the carrier of any shortages or damage. Packing items (plastic bags, polystyrene foam, nails, etc.) must be kept out of the reach of children, as they are potentially dangerous. Before installing the appliance, carefully read the “Warning” information on page 3. The unit is designed for indoor use only.
GAHP-W – Installation, start-up, use and maintenance manual 2.4 GAHP-W AND GAHP-W LB DIMENSIONS 11 24-16 " B 15-21" (*) 60-21" 1 Ø /2 FPT 7 Ø /8 FPT A – GAS INLET B – ELECTRICAL KNOCKOUT 27-38" (*) 3-81" 13 7-16 " LEGEND A 25-34" 10-21" 4" 33" 9 51-16 " 14 – 33-21" 37-13 16" 50-34" Figure 1 GAHP-W and GAHP-W LB external dimensions.
Overview and technical specifacions 20" B C 11" A 7" 8" D E LEGEND 19-21" A – CHILLED WATER INLET Ø 1” ¼ FPT B – HOT WATER INLET Ø 1” ¼ FPT C – CHILLED WATER OUTLET Ø 1” ¼ FPT D – HOT WATER OUTLET Ø 1” ¼ FPT E – SAFETY VALVE CONNECTION 31-21" Figure 2 – GAHP-W and GAHP-W LB connection dimensions. 2.5 PLACING OF THE APPLIANCE Do not remove packaging during handling on the installation site. Packing must only be removed upon final installation.
GAHP-W – Installation, start-up, use and maintenance manual REQUIRED CLEARANCES FROM COMBUSTIBLE MATERIALS AND FOR SERVICE ACCESS. 36” 31-21" UNIT FRONT SIDE 18" 18" UNIT FRONT SIDE 3136”21" UNIT FRONT SIDE 18" Figure 3 16 18" 18" - Minimum clearances; single unit installation and multiple unit installation.
Overview and technical specifacions 2.6 VENTING AND COMBUSTION AIR As an additional measure of safety, Robur strongly recommends installation of suitable Carbon Monoxide (CO) detectors in the vicinity of this appliance and in any adjacent occupied spaces. Combustion Air GAHP-W and GAHP-W LB units must have provisions for combustion and ventilation air in accordance with the applicable sections addressing requirements for air for combustion and ventilation of the National Fuel Gas Code, ANSI Z223.1.
GAHP-W – Installation, start-up, use and maintenance manual o Each of the two openings should be sized based on a minimum free area of one square inch per 2000 Btu/hr. Figure 5 - Air taken from another interior space, each of the two openings specified below should have a net free area of one square inch for each 1,000 Btu/hr of input, but not less than 100 square inches.
Overview and technical specifacions All dimensions based on net free area in square inches. Metal louvers or screens may reduce the free area of a combustion air opening a minimum of approximately 25%. Check with louver manufacturers for exact net free area of louvers. Under no circumstances should the equipment room ever be under a negative pressure. Particular care should be taken where exhaust fans, attic fans, clothes dryers, compressors, air handling units, etc. may take away air from the unit.
GAHP-W – Installation, start-up, use and maintenance manual Please note that a transition fitting is required to connect the flue pipe supplied with the Robur unit to the additional flue pipe required to vent to the outdoors. The exhaust temperature on the Robur models GAHP-W and GAHPW-LB will not exceed 475°F. The maximum allowable pressure drop from the top of the chimney (Bottom of terminal fitting (A) shown in Figure 7) is 0.25 PSF (Pound Square Foot).
Overview and technical specifacions Route the vent pipe to the heater as directly as possible. Seal all joints and provide adequate hangers. Horizontal portions of the venting system must be supported to prevent sagging and may not have any low sections that could trap condensate. The unit must not support the weight of the vent pipe. Horizontal runs must slope downwards not less than ¼ inch per foot from the unit to the vent terminal.
GAHP-W – Installation, start-up, use and maintenance manual VENT TERMINAL The terminal Must be located in accordance with ANSI Z223.1/NFPA 54 and applicable local codes. In Canada, the installation must be in accordance with CSA B149.1 and local applicable codes. Consider the following when installing the vent terminal: 1. Locate the vent terminal so that vented gases cannot be drawn into air conditioning system inlets. 2.
Overview and technical specifacions Figure 8 INSTALLATION OF CARBON MONOXIDE DETECTORS The installing contractor shall observe that a hard-wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas equipment is to be installed.
GAHP-W – Installation, start-up, use and maintenance manual It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard-wired carbon monoxide detectors.
Overview and technical specifacions The appliance and its gas connection must be leak tested before placing it in operation. Purge all air from gas lines. Do not use an open flame to check for leaks. An open flame could lead to explosion, which could result in property damage, serious injury or death. Vertical gas pipes must be equipped with a siphon with a drain for the condensate. It may also be necessary to insulate the gas pipe to prevent the formation of excessive condensate.
GAHP-W – Installation, start-up, use and maintenance manual MANIFOLD GAS PRESSURE ADJUSTMENT PROCEDURE 1. Ensure that all air is properly bled from the gas line before starting the ignition sequence. Start-up without properly bleeding air from the gas line may require multiple reset functions of the ignition control module to achieve proper ignition. 2. Turn the gas valve knob to the “OFF” position. 3.
Overview and technical specifacions 2.8 WATER CONNECTIONS Piping should be supported by suitable hangers or floor stands. Do not support piping with this appliance. Due to expansion and contraction of copper pipe, consideration should be given to the type of hangers used. Rigid hangers may transmit noise through the system resulting from the piping sliding in the hangers. Use stainless steel, black steel, copper or cross linked polyethylene pipes for heating/chilling plants.
GAHP-W – Installation, start-up, use and maintenance manual PROPYLENE GLYCOL CAPACITY CORRECTION FACTOR TABLE Percent Propylene Glycol 15% 20% 25% 30% 35% 40% 50% Approximate Freezing Point In °F 25° 21° 17° 11° 5° 0° -10° Capacity Factor Multiplier * 0.98 0.96 0.95 0.93 0.92 0.91 0.89 Pressure Drop Multiplier ** 1.08 1.11 1.16 1.21 1.27 1.32 1.
Figure 11 - Ed. 2014-08 ANTIVIBRATION JOINTS CHECK VALVE CUT-OFF VALVE EXPANSION TANK WATETR BUFFER 3 5 7 9 GAS 7 1 KEY 9 6 8 5 4 3 P P 2 1 2 10 8 6 4 P 2 3 P 4 5 8 DIRECT DIGITAL CONTROLLER (DDC, available as optional) SAFETY RELIEF VALVE 45 PSIg WATER PUMP WATER STRAINER ∅ 2” ½ * (filter mesh about 0.
GAHP-W – Installation, start-up, use and maintenance manual The appliance is not equipped with any expansion tank. It is necessary to install a properly sized expansion tank. The water pumps must be installed on the inlet (to the unit) water line. The installation of the water strainer is mandatory. The manufacturer will not be held responsible or liable for any damage caused by the absence of this component.
Overview and technical specifacions In order to prevent any possible problem due to a poor quality of the system water, refer to the applicable codes and standards about water treatment for HVAC installations. Refer to the following table for the water quality. CHEMICAL AND PHYSICAL PARAMETERS OF WATER IN HAETING/COOLING SYSTEMS PARAMETER UNIT OF MEASUREMENT ALLOWABLE RANGE \ > 7 (1) ppm < 125 °f < 15 IRON ppm < 0.5 (1) COPPER ppm < 0.1 (1) ALUMINIUM ppm <1 \ 0 – 0.
GAHP-W – Installation, start-up, use and maintenance manual Connect the ducting system to hole E (see Figure 2 at page 15) on the top panel of the unit. Do not install any valve in the ducting system. The manufacturer does not accept any contractual or extra-contractual liability for any damage caused by improper installation of the ducting system. 1. Remove the plastic cap on the top panel (detail E of Figure 2 at page 15). 2.
Electrical connections SECTION 3 ELECTRICAL CONNECTIONS The appliance must be electrically grounded in accordance with the requirements of the local building authority having jurisdiction or, in the absence of such requirements, with the latest edition of the National Electrical Code, ANSI/NFPA 70, in the U.S. and with latest edition of CSA C22.1 Canadian Electrical Code, Part 1, in Canada. Do not rely on the gas or water piping to ground the metal parts of the Robur GAHP units.
GAHP-W – Installation, start-up, use and maintenance manual 3.1 S61 AND ROBUR ELECTRICAL DIAGRAM KEY S61 electronic control board key Figure 13 - S61 electronic control board key. TOP EDGE BOTTOM EDGE THMF OUTLET WATER TEMPERATURE PROBE FAN (BK, WH, BR) FAN MOTOR ELECTRICAL SUPPLY (BLACK, WHITE, BROWN) THRF INLET WATER TEMPERATURE PROBE N.O.
Electrical connections Figure 14 - Ed.
GAHP-W – Installation, start-up, use and maintenance manual Robur electric diagram key SYMBOL DESCRIPTION R-W R-Y 0 Heating on-off switch (24 V out) Cooling on-off switch Not used (24 V out) L N GROUND Hot 230V Hot wire Neutral Wire Ground C F CS GS Capacitor Fuse On-off switch Main switch PY PW Cooling water pump Heating water pump PWRTR DDCTR IGNTR PTR 230/24V transformer 230/24V transformer Ignition Transformer Water Pump Transformer MV DV GV Motor Valve Defrosting Valve Gas Valve DDC Dir
Electrical connections 3.2 OPERATION OF THE APPLIANCE THROUGH R-W-Y CONTACTS ON THE ELECTRONIC BOARD (WITHOUT ROBUR OPTIONAL DIRECT DIGITAL CONTROLLER - DDC) Before doing any electrical connection, make sure that the unit is not powered. Do not switch on and off the unit using the main switch indicated with the symbol GS in Figure 15. Label the wires you need to disconnect during service. Wiring errors can cause improper and dangerous operation. 1.
GAHP-W – Installation, start-up, use and maintenance manual The operations mentioned above are not necessary if a Direct Digital Controller (DDC) is installed. The on-off signal comes directly from the DDC. Figure 16 - 4. On-off switch connection. Connect the heating and cooling water pumps. • If the electrical consumption of each water pump (heating and cooling) is lower than 4A, the pumps can be connected directly to the N.O. contacts on the board. PY is the cooling water pump.
Electrical connections • If the electrical consumption of each water pump (heating and cooling) is higher than 4A, the pumps must be connected using two relays. PY is the cooling water pump, R2 is the cooling pump relay. PW is the heating water pump, R1 is the heating pump relay. Open the jumpers J10. Figure 18 - • Connection of water pumps with electrical consumption higher than 4A Example of water pump connections with more than one appliance.
GAHP-W – Installation, start-up, use and maintenance manual Figure 19 - Connection of water pumps with more than one appliance 3.3 OPERATION OF THE APPLIANCE THROUGH ROBUR DIRECT DIGITAL CONTROLLER (DDC) Refer to the pertinent manuals for specific information on the DDC. The appliance and the DDC are connected via a CAN-bus network. Example of CAN-bus connections (see Figure 19): 1. One appliance (A) and one DDC. The two devices are “terminal” nodes. 2. Two (or more) appliances (A and B) and one DDC.
Electrical connections max). The DDC can be installed anywhere in the CAN-bus line. CAN-bus cable specifications The CAN bus cable must meet the Honeywell SDS standard. The installation of a cable which is not compliant with the Robur specifications will void the manufacturer’s warranty. Below is a table listing the cable types which meet the Robur specifications.
GAHP-W – Installation, start-up, use and maintenance manual KEY GND L H J1 A B Common signal LOW signal HIGH signal CAN BUS jumpers J1 “Terminal” node configuration - 3 wires - J1 closed “Intermediate” node configuration - 6 wires - J1 open CAN-bus connection.
Electrical connections • If the appliance is an “intermediate node”, connect the cable as shown in Figure 26. Respect to the sequence L, H, GND. Open jumpers J1. 5. Fix the CAN bus cable to the clamp as indicate in Figure 24 letter C. Figure 23 - CAN-bus Connector supplied with the DDC B D B C A KEY GND L H J21 Figure 24 - Ed.
GAHP-W – Installation, start-up, use and maintenance manual L GND J21 H DDC Figure 25 - CAN-bus connection to the DDC: “intermediate” node L GND J21 H DDC Figure 26 - CAN-bus connection to the DDC: “terminal” node Supply Power to the DDC The DDC requires a low voltage (24 V) power supply. Install a dedicated 230/24 V, 60Hz safety transformer (minimum 20 VA). Connect the DDC to the transformer using the 4-pole connector. See Figure 24.
Electrical connections • • • • sealing of the gas and water pipes. the gas supply pressure is within the rating limits indicated by the manufacturer. the gas and electric lines are equipped with all safety devices required by current regulations the unit is grounded in accordance with the requirements of the local building authority having jurisdiction or, in the absence of such requirements, with the latest edition of the National Electrical Code, ANSI/NFPA 70, in the U.S.
GAHP-W – Installation, start-up, use and maintenance manual - Cooling mode/priority: Robur unit operates only if there is cooling demand. The goal is the cooling water set-point and the unit stops only when it is satisfied. The heating water set-point is not considered. Once the shut-down cycle is over, the cooling water pump stays on while the heating water pump stops. - No priority (mode not available with the DDC): Robur unit operates whether there is a cooling or heating demand.
End user SECTION 4 END USER 4.1 STARTING AND SHUTTING DOWN OF THE APPLIANCE Refer to the Direct Digital Controller (DDC) manual, if the appliance is controlled by a DDC. In this case it is possible to switch on and shut down the unit only through the DDC. If the appliance is not controlled by a DDC, it can be switched on and shut down through the on/off switch connected to the R-W-Y contacts on the electronic board (S61). See Figure 16 on page 38 according to the priotity mode choosen.
GAHP-W – Installation, start-up, use and maintenance manual If the error persists, contact an authorized Robur Service Company. c. If the ignition does not fail, the unit should be in normal operation. 6. Switch off the appliance though the DDC (if present) or through the on/off switch connected to the electronic board (S61). a. The shut down cycle lasts approximately 10 minutes. 4.2 LONG INACTIVITY PERIOD Operations to be performed by a qualified installer.
End user C A B Electronic Control Board S 61 KEY A 4 digit DISPLAY for data and codes visualization B KNOB (encoder) to scroll/select operating data C CAN PORT for the CAN-BUS cable connection Figure 27 - – S61 control board W10 that controls the heating water pump.
GAHP-W – Installation, start-up, use and maintenance manual - outlet cold water temperature, inlet cold water temperature, cold water ∆T - outlet hot water temperature, inlet hot water temperature, hot water ∆T Example: INLET COLD WATER TEMPERATURE OUTLET COLD WATER TEMPERATURE COLD WATER ∆T OUTLET HOT WATER TEMPERATURE INLET HOT WATER TEMPERATURE HOT WATER ∆T Table 22 - Operating information example If any warning or error occurs, the display shows, sequentially, the codes corresponding to the prob
End user 4.4 RESET In order to reset warning or error messages it is necessary to enter menu 2 of the S61 board and choose the right number. DESCRIPTION PARAMETER Table 23 - 1. 0 IGNITION CONTROL BOX RESET (E212) 1 OTHER WARNINGS/ERRORS RESET E EXIT Menu for reset operations In the electronic board main menu, press and rotate the encoder till the display shows the number 2 2. . Press the encoder knob to access the menu. The display initially shows number (parameter)Parameter “0”, 3.
GAHP-W – Installation, start-up, use and maintenance manual HYDRAULIC PARAMETERDESCRIPTION DISPLAY COLD WATER TEMPERATURE THERMOSTAT CONTROLSELECT COLD WATER THERMOSTATING COLD WATER SET-POINT COLD WATER TEMPERATURE DIFFERENTIAL HOT WATER TEMPERATURE THERMOSTAT CONTROLSELECT HOT WATER THERMOSTATING HOT WATER SET-POINT HOT WATER TEMPERATURE DIFFERENTIAL EXIT(EXIT TO PREVIOUS MENU) Table 24 - Parameters of menu 3 for hydraulic configuration of the appliance Description of parameters: PARAMETER 73: 0: the
End user Parameter 160: 0 Parameter 161: 110°F Parameter 162: 10°F Inlet hot water temperature lower than 110°F: the unit is ON Inlet hot water higher (or equal) than 110°F: the unit is OFF. The unit will re start when the inlet hot water temperature is lower than 110°F - 10°F = 100°F 4.6 UNIT START UP The unit start up must be performed only by an authorized Robur Service Company. If the procedure is not performed by an authorized Robur Service Company, the manufacturer will void the warranty.
GAHP-W – Installation, start-up, use and maintenance manual • • • • • • • • • • • • • Check the water pressure in the water loop. Power on both the unit and the DDC (if present). Set the priority/operating mode (see page 45). Check for water leaks. Set the manifold gas pressure (see Table 13 on page 25). o Unscrew tap C (See Figure 29). o Connect the manometer to C. o Switch on the unit (see chapter 4.1 on page 47). o In case of ignition problem, the flame control box tries three times to ignite.
End user COMPLETE THE START UP PROCEDURE AND THEN SWITCH THE UNITS OFF IF: ‐ The clearances have not been respected (see Figure 3 on page 16). ‐ The static pipeline gas pressure does not comply with the Robur specifications indicated in the Robur Installation Manual (see Table 13 on page 25) and data plate. ‐ The dynamic pipeline gas pressure does not comply with the Robur specifications indicated in the Robur Installation Manual (see Table 13 on page 25) and data plate.
GAHP-W – Installation, start-up, use and maintenance manual ORDINARY MAINTENANCE Perform the following operations at least once every 2 years. 1. Inspect chilled water circuit; check water flow rate, operating pressure and unit flow switch. 2. Check the hydraulic pump oil level. If it is low, check any possible leaking 3. Inspect the belt for proper belt tension, alignment or wear. Replace the beltsand pulleys after 6 years or 12,000 operation hours 4.
End user 8. Replace the label with the new one indicating the new gas type that has to be used. 9. Check for leaks in all gas pipe connections. 10. Replace the front and left panel. F F A B G B gas valve C H air/gas mixer D C E LEGEND A B C D Figure 30 - GAS VALVE GAS VALVE FLANGE GAS NOZZLE O-RING E F G H GASKET GAS PIPE SCREW (n. 4) HEXAGONAL NUT Gas change 4.9 OPERATING CODES - TROUBLESHOOTING (firmware release 3.
GAHP-W – Installation, start-up, use and maintenance manual W 203 – Warning 203 Antifreeze. Water temperature is below the operational limit. E 205 – Warning 205 Ambient temperature higher than operational limit. W 206 – Warning 206 Ambient temperature lower than operational limit. W/E 207 – Warning and Error 207 High rectifier temperature. If the problem persists contact an authorized Robur Service Company. E 208 – Error 208 Burner “on” with the ignition control box locked.
End user E 220 – Error 220 Rectifier temperature probe defective. If the problem persists contact an authorized Robur Service Company. E 228 – Error 228 Gas valve “on” when the ignition control box is locked. If the problem persists contact an authorized Robur Service Company. W/E 229 – Warning and Error 229 Gas valve “off” when the ignition control box is “on”. If the problem persists contact an authorized Robur Service Company.
GAHP-W – Installation, start-up, use and maintenance manual Insufficient hot water flow. If the problem persists contact an authorized Robur Service Company. E 276 – Error 276 Outlet hot water temperature probe defective. If the problem persists contact an authorized Robur Service Company. E 277 – Error 277 Inlet hot water temperature probe defective. If the problem persists contact an authorized Robur Service Company. W 278 – Warning 278 Outlet hot water temperature is above the operational limit.
Appendix A APPENDIX A IGNITION CONTROL BOX When power is supplied to the unit (to the “R” terminal on the ignition control box), ignition control will reset, perform a self check routine, flash the diagnostic LED, and enter thermostat scan state. When the control switch is closed, the electronic control board will energize the ignition control box starting the ignition sequence (24 volts applied to the “W” terminal on the ignition box).
GAHP-W – Installation, start-up, use and maintenance manual FC± DIAGNOSTIC LED “W” TERMINAL “R” TERMINAL Figure 31 - 62 Ignition control box.
Robur Mission Robur Corporation advanced heating and cooling technologies 827 E. Franklin Street Evansville, Indiana 47711 USA P (812) 424 1800 F (812) 422 5117 www.robur.com/us sales@robur.com rhalbig.servel@sbcglobal.net Codice: D-LBR367 rev.
