Test RM7840 Test Volt- If Operation Is Abnormal,
No. Models Jumpers meter Normal Operation Check The Items Listed Below
WARNING
Make sure all manual fuel shutoff valves are closed.
IMPORTANT: Low fuel pressure limits, if used, could be open. Bypass them with jumpers for the remaining Static Tests
(if required).
1 All None 4-L2 Line voltage at terminal 4. 1. Master switch.
2. Power connected to the master
switch.
3. Overload protection (fuse, circuit
breaker) has not opened the power
line.
2 All None 6-L2 Line voltage at terminal 6. 1. Limits.
2. Burner controller.
3 All None 20-L2 Line voltage at terminal 20. 1. Preignition interlocks.
4 All 4-5 7-L2 1. Burner motor (fan or blower) 1. Burner motor circuit.
starts. a. Manual switch of burner motor.
2. Line voltage at terminal 7 within b. Burner motor power supply,
10 seconds. overload protection, and starter.
c. Burner motor.
2. Running or Lockout Interlocks
(including Airflow Switch).
5 All 4-10 — Ignition spark (if ignition transformer 1. Watch for spark or listen for buzz.
is connected to terminal 10). a. Ignition electrodes are clean.
b. Ignition transformer is okay.
6 All 4-8 — 1. Ignition spark (if ignition 1. Watch for spark or listen for buzz.
transformer is connected to a. Ignition electrodes are clean.
terminal 8). b. Ignition transformer is okay.
2. Automatic pilot valve opens (if 2. Listen for click or feel head of
connected to terminal 8). valve for activation.
NOTE: Refer to wiring diagram of a. Actuator if used.
system being tested. b. Pilot valve.
7 All 4-21 — Same as test no. 6 for connections Same as test no. 6. If using direct
to terminal 8. If using direct spark spark ignition, check the first stage
ignition, check the first stage fuel fuel valve(s) instead of the pilot valve.
valve(s) instead of the pilot valve.
8 All 4-9 — Automatic main fuel valve(s) opens. 1. Listen for and observe operation
If using direct spark ignition on a of the main fuel valve(s) and
model with intermittent pilot on actuator(s).
terminal 21, check the optional 2. Valve(s) and actuator(s).
second stage fuel valve, if used.
9 All 4 -3 — Alarm (if used) turns on. 1. Alarm
10 RM7840 4-5 18-L2 Firing rate motor drives open; zero 1. Low Fire Start Switch.
E,G,L and volts at terminal 18 after motor 2. Firing rate motor and transformer.
models 12-13 starts driving open.
11 RM7840 4-5 18-L2 Firing rate motor drives closed; line 1. Low Fire Start Switch.
E,G,L and voltage at terminal 18 after motor 2. Firing rate motor and transformer.
models 14-13 is in Low Fire position.
12 RM7840 1-5 19-L2 Firing rate motor drives open; line 1. High Fire Purge Switch.
E,L and voltage at terminal 19 after motor 2. Firing rate motor and transformer.
models 12-13 is in High Fire position.
TABLE 4—STATIC CHECKOUT.
!
RM7840E,G,L,M
STATIC CHECKOUT
(continued)
23 65-0087—2
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