Honeywell 7800 Series Manual page 4

RM7888A
SPECIFICATIONS
Terminal Number
G
Earth G
L2(N)
3
4
5
6
7
8
9
10
F(11)
12(B)
13(R)
14(W)
15
16
17
18
19
20
21
22
1
The RM7888 must have an earth ground providing a connection between the subbase and the control panel or the burner.
The earth ground wire must be capable of conducting the current to blow the 20A fuse (or breaker) in event of an internal
short circuit. The RM7888 needs 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 with minimum length conductors having maximum surface areas. Wide straps or brackets are preferred rather than
leadwires. Be careful to make sure 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 RM7888A Assembly.
3
Can also be 120 Vac, 1A pilot duty.
4
Can also be 65 VA pilot duty with motorized valve, 1150 VA inrush, 460 VA open, 250 VA hold.
5
Operating frequency chosen by RM7888A selection.
IMPORTANT: A Flame Detection System that must be ordered separately is required for operation. To select your Plug-
in Flame Signal Amplifier and applicable Flame Detector, see Table 2.
65-0175
TABLE 1—TERMINAL RATINGS.
Description
1
Flame Sensor Ground
1
Earth Ground
Line Voltage Common
Alarm
Line Voltage Supply (L1)
Air Valve
Special Function 1
Limits Complete
Pilot Valve
Main Fuel Valve
Ignition
Flame Sensor
Firing Rate High Fire
Firing Rate Common
Firing Rate Low Fire
Firing Rate Modulate
Unused
Special Function 2
@Low Fire Input
Special Function 3
Special Function 4
Flame Proven
Shutter
60 to 220 Vac, current limited.
—
—
120 Vac, 1A pilot duty.
120 Vac (+10/-15%), 50/60 Hz (±10%)
120 Vac, 9.8A FL, 58.8A LR (inrush).
120 Vac, 1 mA.
120 Vac, 9A.
120 Vac, 4.5A and 50 VA pilot duty
4.
120 Vac, 2A pilot duty
3
120 Vac, 4.5A Ignition
60 to 220 Vac, current limited.
120 Vac, 75 VA Pilot Duty.
120 Vac, 75 VA Pilot Duty.
120 Vac, 75 VA Pilot Duty.
120 Vac, 75 VA Pilot Duty.
—
120 Vac, 1 mA.
120 Vac, 1 mA.
120 Vac, 1 mA.
120 Vac, 1 mA.
120 Vac, 2A pilot duty.
120 Vac, 0.5A.
4
Ratings
2,5
.
3
.