The RM7800RM7840 Relay Modules are used for ULCSA OnOff, ULCSA Modulating, and FMIRI Modulating burner applications.IMPORTANT 1. Wiring connections for the relay modules are unique.Remote Reset leadwiresThe maximum length of wire is 1000 feet to a Remote Reset pushbutton.
Data Controlbus ModuleThe maximum Data Controlbus Module. See tables 4 and 5. RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES Table 2. Recommended Grounding Practices. Use to provide a connection between the subbase and the control panel of the equipment. ![]() Fig. 2. Wiring subbase and sequence for RM7800E,LRM7840E,L. RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES COMMON FOR DIRECT SPARK IGNITION (OIL OR GAS) MODULATE DAMPER MOTOR LOW FIRE START SWITCH 120V, 5060 Hz POWER SUPPLY. SAFETY SHUTDOWN Safety Shutdown (Lockout) occurs if any of the following occur during the indicated period: 1. The blower motor output for the RM7800E is not energized until the High Fire Switch is closed. The Preignition Interlock input must remain closed throughout PREPURGE. The RM7800RM7840G has an interrupted or intermittent pilot valve, terminal 21, depending on the selection of configuration jumper 2. The RM7800RM7840E,L has a fifteen-second interrupted pilot valve, terminal 21. All of the RM7800RM7840s have a ten-second interrupted pilot valveignition, terminal 8. This activates a fifteen second flameout timer that permits pilot flame adjustment without nuisance safety shutdowns. A 30 second MFEP can be accomplished by adding a jumper wire between Terminals 19 and 5. Static Checkout. Normal Operation Line voltage at Terminal 4. Master Switch. 2. Power connected to the Master Switch. Overload protection (fuse, circuit breaker, Line voltage at Terminal 6.
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