Honeywell EC7850A1072 User Manual

EC7830A, RM7830A, EC7850A, RM7850A 7800 SERIES RELAY MODULES
13 32-00198—01
85-8 — 1. Ignition spark (if ignition trans-
former is connected to terminal 8).
2. Automatic pilot valve opens (if
connected to terminal 8).
NOTE: Refer to wiring diagram of sys-
tem being tested.
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
2. Listen for click of fee head of valve for
activation.
a. Actuator, if used.
b. Pilot valve.
9 5-21 — Same as test no. 8 for connections to
terminal 8. If using direct spark ignition,
check the first stage fuel valve(s) instead
of the pilot valve.
Same as test no. 8. If using direct spark
ignition, check the first stage fuel valve(s)
instead of the pilot valve.
10 5-9 — Automatic fuel valve(s) open(s).
If using direct spark ignition on a model
with intermittent pilot on terminal 21,
check the optional second stage fuel
valve, if used.
1. Listen for and observe operation of the
main fuel valve(s) and actuator(s).
2. Valve(s) and actuator(s).
Final
CAUTION
Equipment Damage Hazard.
Failure to remove jumpers can damage equipment.
After completing these tests, open the master switch and remove ALL test jumpers from the subbase
terminals. Then remove bypass jumpers from the low fuel pressure limits (if used).
Table 6. EC/RM7850A Static Checkout.
Test
No.
Test
Jumper
s Voltmeter Normal Operation If Operation is Abnormal, Check These Items
1 None 4-2 Line voltage at terminal 4. 1. Master switch.
2. Power connected to the master switch.
3. Overload protection (fuse, circuit breaker,
etc.) did not open the power line.
2 None 17-2 Line voltage at terminal 17. Preignition interlocks.
3 4-16 — Alarm (if used) turns on. Alarm.
NOTE: Disconnect horn at this time (if used).
4 4-16 2-20 Line voltage at terminal 20. Limits in Lockout Circuit.
5 4-16 2-6 Line voltage at terminal 6. 1. Recycle limits.
2. Burner control.
64-16
5-4
2-7 1. Fan (Burner Motor or Blower)
starts.
2. Line voltage at terminal 7.
1. Fan circuit.
a. Manual fan switch.
b. Fan power supply, overload protection
and starter.
c. Fan.
2. Running limits of Airflow Switch (LD2)
input.
NOTE: Remove jumpers and re-connect alarm (if used).
7 4-10 — Ignition spark (if ignition transformer is
connected to terminal 10).
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
8 4-8 — Ignition spark (if ignition transformer is
connected to terminal 8).
Automatic pilot valve opens (if
connected to terminal 8).
Refer to wiring diagram of system being
tested.
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
2. Listen for click of fee head of valve for
activation.
a. Actuator, if used.
b. Pilot valve.
Table 5. EC/RM7830A Static Checkout. (Continued)
Test
No.
Test
Jumpers Voltmeter Normal Operation
If Operation is Abnormal, Check the Items
Listed Below

Honeywell EC7850A1072 Specifications

General

Brand	Honeywell
Model	EC7850A1072
Category	Relays
Language	English