Honeywell 7800 Series Manual page 23

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