CB780E/CB784E RELAY MODULES WITH VALVE PROVING
32-00150—03 26 750-234
* An ammeter can be used to verify the proper connected loads.
9 All 4-9 * — Automatic main fuel valve(s)
open.
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 actua-
tor(s).
2. Valve(s) and actuator(s).
10 All 4-3 — Alarm (if used) turns on. 1. Alarm.
11 All 4-5
and
12-13
18-L2 Firing rate motor drives open;
zero volts at Terminal 18 after
motor starts driving open.
1. Low Fire Start Switch.
2. Firing rate motor and transformer.
12 All 4-5
and
14-13
18-L2 Firing rate motor drives closed;
line voltage at Terminal 18 after
motor is in Low Fire position.
1. Low Fire Start Switch.
2. Firing rate motor and transformer.
13 All 4-5
and
12-13
19-L2 Firing rate motor drives open;
line voltage at Terminal 19 after
motor is in High Fire position.
1. High Fire Purge Switch.
2. Firing rate motor and transformer.
14 All 4-5
and
14-13
19-L2 Firing rate motor drives closed;
zero volts at Terminal 19 after
motor starts driving closed.
1. Low Fire Start Switch.
2. Firing rate motor and transformer.
15 All 15-13 — 1. Raise setpoint of Series 90
controller—firing rate
motor should drive toward
open.
2. Lower setpoint of Series 90
controller—firing rate
motor should drive toward
closed.
1. Series 90 Controller.
2. Firing rate motor and transformer.
Final All
Equipment Damage Hazard.
Improper wiring can damage equipment.
On completing these tests, open the master switch and remove all test jumpers from the
subbase terminal. Also remove bypass jumpers from the low fuel pressure limits (if used) to
prevent equipment damage.
Table 8. Static Checkout. (Continued)
Test
No.
CB780E/CB7
84E Models
Test
Jumpers Voltmeter Normal Operation
If Operation is Abnormal,
Check the Items Listed Below
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