Checkout - Honeywell 7800 Series Manual

tors, valves, transformers, motors and other devices as re-
quired.
9. Obtain normal operation for each required test before
Test Test
No. Jumpers
1 —
2 3-4
3 —
May need to jumper
limits if used.
4 3-8
5 3-9
6 3-10
Final All
!
WARNING
Do not allow fuel to accumulate in the combus-
tion chamber. If fuel is allowed to enter the
chamber for longer than a few seconds without
igniting, an explosive mixture could result. It is
recommended that you limit the trial for pilot to
ten seconds, and limit the attempt to light the
main burner to two seconds from the time the fuel
has reached the burner nozzle. In any case, do not
exceed the nominal lightoff time specified by the
equipment manufacturer. Close the manual fuel
shutoff valve(s) if the flame is not burning at the
end of the specified time.
TABLE 4—STATIC CHECKOUT.
Normal
Voltmeter Operation
L2-3 Line Voltage
— Alarm sounds
L2-6 Line Voltage
— Pilot Valve opens
— Main Fuel Valve
opens
— Push Start Switch
and listen for
Ignition Noise.
CAUTION
After completed these tests, open the ;master switch and remove all test jumpers
!
from the subbase terminals. Also remove bypass jumpers from limits if used.
21
continuing the checkout.
10. After completing each test, be sure to remove the test
jumper(s).
If Abnormal Check
1. Master Switch
2. Power connected to the master switch.
1. Alarm.
2. Alarm Silencing Switch.
1. Limit.
2. Stop station.
3. Alarm Silencing Switch.
Listen for click or feel head of Valve
Activation.
1. Actuator if used.
2. Pilot Valve.
Listen for click or feel head of Valve
Activation.
1. Actuator if used.
2. Main Fuel Valve.
1. Start Switch.
2. Ignition transformer.
!
CAUTION
1. Use extreme care while testing the system.
Line voltage is present on most terminal con-
nections when power is on.
2. Open the master switch before removing or
installing the RM7885A.
3. Make sure all manual fuel shutoff valve(s) are
closed before starting the initial lightoff check
and the Pilot Turndown Tests.
4. Do not put the system in service until you have
satisfactorily completed all applicable tests in
this section and any others required by the
equipment manufacturer.
RM7885A
OPERATION • CHECKOUT

Checkout

65-0107