2
RM7840E,G,L,M
SPECIFICATIONS • ORDERING INFORMATION
Specifications
ELECTRICAL RATINGS (See Table 1):
Voltage and Frequency: 120 Vac (+10/-15%), 50 or 60
Hz (+/- 10%).
5
Power Dissipation: RM7840: 10W maximum.
Maximum Total Connected Load: 2000 VA.
Fusing: Total Connected Load: 20A maximum, type
FRN or equivalent.
When purchasing replacement and modernization products from your 7800 SERIES distributor, refer to the TRADELINE® Catalog for complete
ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:
1. Your local Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Satisfaction
Honeywell Inc., 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386 (612) 951-1000
In Canada—Honeywell Limited/Honeywell Limitee, 740 Ellesmere Road, Scarborough, Ontario M1P 2V9 International Sales and Service Offices
in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan,
United Kingdom, U.S.A.
Ordering Information
TABLE 1—TERMINAL RATINGS.
Terminal No. Description Ratings
G Flame Sensor Ground
1
Earth G Earth Ground
1
L2(N) Line Voltage Common
3 Alarm 120 Vac, 1A pilot duty.
4 Line Voltage Supply (L1) 120 Vac (+10/-15%), 50 or 60 Hz (+/- 10%).
2,3
5 Burner Motor 120 Vac, 9.8 AFL, 58.8 ALR (inrush).
6 Burner Controller and Limits 120 Vac, 1 mA.
7 Lockout/Running Interlock 120 Vac, 9A.
8 Pilot Valve/Ignition 120 Vac, 4.5A Ignition and 50VA pilot duty.
3
9 Main Fuel Valve 120 Vac, 2A pilot duty.
4
10 Ignition 120 Vac, 4.5A Ignition.
3
F(11) Flame Sensor 60 to 220 Vac, current limited.
12 Firing Rate High Fire 120 Vac, 75 VA pilot duty.
13 Firing Rate Common 120 Vac, 75 VA pilot duty.
14 Firing Rate Low Fire 120 Vac, 75 VA pilot duty.
15 Firing Rate Modulate 120 Vac, 75 VA pilot duty.
16 Unused
17 Unused
18 Low Fire Switch Input 120 Vac, 1 mA.
19 High Fire Switch Input 120 Vac, 1 mA.
20 Preignition Interlock Input 120 Vac, 1 mA.
21 Interrupted/Intermittent Pilot Valve/
First Stage Oil Valve 120 Vac, 2A pilot duty.
22 Shutter 120 Vac, 0.5A.
1
The RM7840 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 (or breaker) in event of an internal short
circuit. The RM7840 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 that have maximum surface areas. Wide straps or brackets rather than leadwires are preferred. 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 RM7840 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 RM7840 selection.
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