Honeywell RM7838B1013 User Manual

RM7838B,C 7800 SERIES RELAY MODULE
9 32-00199—01
Table 3. Static Checkout.
Test
No.
Test
Jumpers Voltmeter Normal Operation
If Operation is Abnormal, Check These
Items
1 None 4-L2 Line voltage at terminal 4. 1. Master Switch.
2. Power Connected to the Master
Switch.
3. Overload protection (fuse, circuit
breaker, etc) has not opened the
power line.
2 None 6-L2 Close burner control.
Recirculating exhaust blower fan starts, then
line voltage at terminal 6.
1. Recirculating/exhaust blower fan.
2. Limits.
3. Stop Switch.
4. Burner Control.
5. Recirculating AFS.
2a None 4-20 Line voltage at terminal 20. Preignition Interlock.
2b None
Close
Pilot
Valve
Hold
4-16 Line voltage at terminal 16. Pilot Valve Hold.
NOTE: RM7838C1020/RM7838C2020
does not have Pilot Valve Hold.
2c None
Close
Manual
Open
Valve
Switch
4-17 Line voltage at terminal 17. Manual Open Valve Switch.
NOTE: RM7838C1020/RM7838C2020
does not have MOV.
3 None 21-L2 With test 2 still running, press Start Switch.
120 Vac is present at terminal 21.
1. Start Switch.
2. Preignition Interlock.
4 None 6-L2 Push and hold Stop Switch. No voltage
present at terminal 6.
Stop Switch.
5 4-3 None Alarm (if used) turns on. 1. Alarm.
2. Alarm Silencing Switch (B model only).
6 4-5 7-L2 Close burner control. Recirculating/exhaust
blower fan starts, then line voltage is present
at terminal 6.
1. Combustion air fan starts.
2. Line voltage at terminal 7 within 10 seconds.
1. Combustion air fan circuit:
a. Manual switch on air fan motor.
b. Air fan power supply, overload protec-
tion, and starter.
2. Combustion Blower Air Flow Switch.
3. Alarm Silencing Switch (B model only).
4. Recirculating Air Flow Switch.
7 4-8 None Automatic pilot valve opens. First stage valve
(DSI application only).
Ignition spark (if ignition transformer
connected).
1. Listen for click or feel head of valve for
activation.
2. Watch for spark or listen for buzz:
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
8 4-9 None Automatic main fuel valves open. (DSI
checks optional second state fuel valve.)
Listen for and observe operation of the
main fuel valve(s) and actuator(s).
9 4-10 None Ignition spark (if ignition transformer
connected to terminal 10.
1. Watch for spark or listen for buzz:
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
10 12-13 18-L2 Firing rate motor drives open; zero volts at
terminal 18 after motor leaves Low Fire
position.
1. Low Fire Start Switch.
2. Firing rate motor and transformer.
11 12-13 19-L2 Firing rate motor reaches High Purge Rate
position; 120 Vac at terminal 19 when High
Purge Rate Switch closes.
1. High Purge Rate Switch.
2. Firing rate motor and transformer.
12 13-14
(13-15 for
C1020)
19-L2 Firing rate motor leaves High Purge Rate
Position; zero Vac at terminal 19 when High
Purge Rate Switch opens.
1. High Purge Rate Switch.
2. Firing rate motor and transformer.
13 13-14
(13-15 for
C1020)
18-L2 Firing rate motor drives to Low Purge Rate
position; 120 Vac at terminal 18 when switch
closes.
1. Low Purge Rate Switch.
2. Firing rate motor and transformer.

Honeywell RM7838B1013 Specifications

General

Brand	Honeywell
Model	RM7838B1013
Category	Control Unit
Language	English