Honeywell 7800 Series Manual page 4

7800 SERIES RM7830A, RM7850A RELAY MODULE
Terminal No. Abbreviation
G —
Earth G —
N —
3 AL
4 L1
5 FAN
6 RT
7 LD2
8 PV1
9 MV
10 IGN
F(11) —
12 HI
13 COM
14 MOD
15 LO
16 —
17 ES2
18 ES1
19 ES3
20 LOS
21 PV2
22 SHTR
1
The RM7850A must have an earth ground providing a connection between the subbase and the control panel or the equipment.
The earth ground wire must be capable of conducting the current to blow the 20A fuse in event of an internal short circuit. It is
recommended that the RM7850A have a low impedance ground connection to the equipment frame which, in turn, needs a low
impedance connection to earth ground. For a ground path to be low impedance at RF frequencies, the connection must be made
by minimum length conductors having maximum surface areas. Wide straps or brackets are preferred rather than leadwires. Be
careful to ensure that mechanically tightened joints along the ground path, such as pipe or conduit threads or surfaces held
together with fasteners, are free of nonconductive coatings and are protected against mating surface corrosion.
2
2000 VA maximum connected load to RM7850A Assembly.
3
Total load current, excluding Burner/Boiler Motor and Firing Rate Outputs cannot exceed 5A, 25A inrush.
4
Can also be 24 Vac, 3A at P.F. = 0.5.
5
Honeywell has tested this output at 9.8A at P.F. = 0.5, 58.8A inrush for 100,000 cycles (EN298 approval does not require
this test).
65-0222
Table 1B. Terminal Ratings for RM7850A.
Description
1
Flame Sensor Ground
1
Earth Ground
Line Voltage Common
(Neutral)
Alarm (Normally Open)
Line Voltage Supply (L1)
Burner/Blower Motor
Limits and Burner Control
Airflow Switch Input
Pilot Valve 1 (Interrupted)
Main Fuel Valve
Ignition
Flame Signal
Firing Rate High Fire
Firing Rate Common
Firing Rate Modulate
Firing Rate Low Fire
Control Voltage
Preignition Interlock Input
Low Fire Switch Input
High Fire Switch Input
Lockout Input
Pilot Valve 2 (Intermittent)
Shutter
4
Ratings
120 Vac, 1A, 10A inrush for 5000 cycles.
115-125 Vac (+10/-15%), 50/60 Hz (+/- 10%).
120 Vac, 4A at P.F. = 0.5, 20A inrush.
120 Vac, 5 A (maximum).
120 Vac, 1 mA.
120 Vac, 4A at P.F. = 0.5, 20A inrush.
120 Vac, 4A at P.F. = 0.5, 20A inrush.
3
120 Vac, 2A at P.F. = 0.2.
136 to 220 Vac, current limited.
120 Vac, 0.5A at P.F. = 0.5.
120 Vac, 0.5A at P.F. = 0.5.
120 Vac, 0.5A at P.F. = 0.5.
120 Vac, 0.5A at P.F. = 0.5.
115 to 125 Vac (+10/-15%).
120 Vac, 1 mA.
120 Vac, 1 mA.
120 Vac, 1 mA.
120 Vac, 1 mA.
120 Vac, 4A at P.F. = 0.5, 20A inrush.
Shutter Drive for Dynamic Self-Check flame sensor.
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