7800 SERIES EC7890A,B/RM7890A,B RELAY MODULE
65-0204–1
5
Device
Initiate
Standby
PilotFlame Establishing Period
Run
7890A
10 sec
*
4 or 10 sec
*
* STANDBY and RUN can be an infinite time period.
Sequence Timing for Normal Operation:
Approvals:
RM7890:
Underwriters Laboratories Inc. Listed, File No. MP268,
Guide No. MCCZ.
Factory Mutual Approved: 0X4AS.AF.
EC7890:
Factory Mutual Approved: OX4AS.AF.
Mounting:
Q7800A for panel mount or Q7800B for wall or burner mount.
Required Components:
Plug-in Flame Signal Amplifier, see Table 2.
Q7800A or Q7800B.
Accessories:
Optional:
COMBUSTION SYSTEM MANAGER™, part no.
ZM7850A1001.
Network Interface Unit, part no. Q7700B1004.
Communication Interface ControlBus Module, part no.
QS7800A1001.
ControlBus 5-Wire Electrical Connector, part no. 203541.
DATA CONTROLBUS MODULE™, part no. S7810A1009.
Dust Cover, part no. 221729A.
Flame Simulators:
Flame Simulator, part no. 203659 UV.
Rectification Simulator, part no. 123514A .
Keyboard Display Module, part no. S7800A.
Remote Display Mounting Bracket, part no. 203765.
Remote Display Power Supply, part no. 203968A Plug-in.
Remote Reset Module, part no. S7820A1007.
Sixty-inch Extension Cable Assembly, part no. 221818A.
Fig. 1. Mounting dimensions of 7890 Relay Module and Q7800A. Subbase in in. (mm).
POWER
PILOT
FLAME
MAIN
ALARM
RESET
5
(127)
5 (127)
M11135
(133)
BURNER
CONTROL
REMOVE ONLY FOR TERMINAL TEST ACCESS.
1
1
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