Product Overview
Table Of Contents
- Application
- Features
- Optional Features
- Specifications
- Principal Technical Features
- Safety Provisions
- Internal Hardware Status Monitoring
- Closed Loop Logic Test
- Dynamic AMPLI-CHECKTM Circuitry
- Dynamic Input Check
- Dynamic Safety Relay Test
- Dynamic Self-Check Safety Circuit
- Expanded Safe-Start Check
- Off Cycle (Standby) Flame Signal Check
- Tamper Resistant Timing and Logic
- Verified Spark Termination
- First-Out Annunciation and Self- Diagnostics
- Interlock Requirements (RM7895 Only)
- Installation
- Wiring
- Assembly
- Operation
- Initiate
- Standby
- Static Checkout
- Checkout
- Equipment Recommended
- Checkout Summary
- Preliminary Inspection
- Flame Signal Measurement
- Initial Lightoff Check for Proved Pilot
- Initial Lightoff Check for Direct Spark Ignition (DSI)
- Pilot Turndown Test (All Installations Using a Pilot)
- Ignition Interference Test (All Flame Rods)
- To Eliminate Ignition Interference
- Flame Signal with Hot Combustion Chamber (All Installations)
- Safety Shutdown Tests (All Installations)
- Troubleshooting
RM7890; RM7895 100 VAC 7800 SERIES RELAY MODULES
66-1195—01 10
Fig. 4. Internal block diagram of the RM7895 Relay Module (see Fig. 6 for detailed wiring instructions).
WIRING
WARNING
Electrical Shock Hazard or Equipment and Control
Damage Hazard.
Can cause severe injury, death or equipment and
control damage.
Disconnect the power supply before beginning
installation.
1. For proper subbase wiring, refer to Fig. 5 and 6.
2. For proper remote wiring of the KDM, refer to the
Specifications for the KDM (65-0090), Data
ControlBus™ Module (65-0091) or Extension Cable
Assembly (65-0131).
3. Disconnect the power supply from the main disconnect
before beginning installation to prevent electrical shock
and equipment damage. More than one disconnect may
be required.
4. All wiring must comply with all applicable electrical
codes, ordinances and regulations. Wiring, where
required, must comply with NEC, Class 1 (Line Voltage)
wiring.
5. Recommended wire size and type: See Table 6 for the
recommended wire sizes and part numbers.
CONFIGURATION
JUMPERS
MICROCOMPUTER
RESET
PUSHBUTTON
STATUS LEDs
PLUG-IN PURGE
TIMER CARD
SAFETY RELAY
CIRCUIT
POWER SUPPLY
OPTIONAL KEYBOARD
DISPLAY MODULE
PLUG-IN
FLAME
AMPLIFIER
RELAY
DRIVE
CIRCUIT
CONTROL
POWER
TEST
JACK
REMOTE
RESET
DDL
DDL
COMMUNICATIONS
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
IGNITION
PILOT
MAIN VALVE
1K
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
LIMITS CONTROLLER
LOCKOUT
INTERLOCK
1K1
2K1
5K1
100 Vac
FLAME SIGNAL
TEST
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
RS485
1
2
3
L1
(HOT) L2
5
6
7
4K1
2K2
10
8
9
7K
6K
5K
4K
3K
2K
F
G
1
BLOWER
6K1
4
ALARM
3K1
3
L2
M32661
1