EC7830, RM7830A,EC7850A,RM7850A 7800 SERIES RELAY MODULES
13
66-1092—2
Table 5. EC/RM 7850A Static Checkout (continued).
Test
No.
Test
Jumpers
Voltmeter
Normal Operation
If Operation is Abnormal,
Check These Items
13
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.
14
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
CAUTION
E
lectrical Hazard.
Can cause equipment damage.
After completing these tests, open the master switch and remove all test jumpers from the subbase terminals. Also
remove bypass jumpers from the low fuel pressure limits (if used).
WARNING
Explosion hazard.
Can cause serious injury or death.
Be sure all manual fuel shutoff valves are closed.
Mounting Other System Components (Fig. 5)
Refer to the applicable specifications for mounting other
system components.
PRINCIPAL TECHNICAL FEATURES
The EC/RM7830A or EC/RM7850A Relay Module provide all
customary flame safeguard functions as well as significant
advancements in safety, annunciation, and system
diagnostics.
Safety Shutdown (Lockout) Occurs If:
1. INITIATE Period
a.
Purge card is not installed or removed.
b.
Purge card is defective.
c.
Configuration jumpers were changed (after 200
hours of operation).
d.
AC line power errors, see Operation.
e.
Four minute INITIATE period is exceeded.
2. STANDBY Period
a.
Flame signal is present after 40 seconds.
b.
Preignition Interlock is open an accumulative time
of 30 seconds.
c.
Airflow Switch feature is enabled and the Airflow
Switch is closed for 120 seconds with Limits and
Burner Control closed.
d.
Ignition/pilot valve/intermittent pilot valve terminal
is energized.
e.
Main valve terminal is energized.
f.
Internal system fault.
g.
Purge card is not installed or removed.
h.
Purge card is defective.
i.
Lockout Input opens during STANDBY.
3. PURGE Period
a.
Preignition Interlock opens anytime during purge.
b.
Flame signal detected during purge.
c.
High Fire Switch fails to close within five minutes
after the firing rate motor is commanded to drive
to high fire position at start of purge (EC/
RM7850A).
d.
Low Fire Switch fails to close within five minutes,
after firing rate motor is commanded to drive to
low fire position at end of purge (EC/RM7850A).
e.
Airflow Switch Input does not close within 10
seconds.
f.
If Airflow Switch is disabled, there is no jumper
between terminals 6 and 7.
g.
Airflow Switch opens during PURGE.
h.
Lockout Input opens during purge.
i.
Ignition/pilot valve/intermittent pilot valve terminal
is energized.
j.
Main valve terminal is energized.
k.
Internal system fault.
l.
Purge card is removed.
m. Purge card is defective.
4. PREIGNITION
a.
Lockout Input opens during PREIGNITION.
b.
Airflow Switch opens during PREIGNITION.
c.
Preignition Interlock opens during PREIGNITION.
d.
Flame signal detected during PREIGNITION.
e.
Ignition terminal is not energized.
f.
Pilot valve/intermittent pilot valve terminal is
energized.
g.
Main valve terminal is energized.
h.
Internal system fault.
i.
Purge card is removed.
j.
Purge card is defective.
5. SAFETY 1 PERIOD
a.
Lockout Input opens during SAFETY 1.
b.
Airflow Switch opens during SAFETY 1.
c.
Low Fire Switch opens (EC/RM7850A).
d.
No flame is present at the end of SAFETY 1.
e.
Ignition terminal is not energized.
f.
Pilot valve/intermittent pilot valve terminal is not
energized.
g.
Main valve terminal is energized.
h.
Internal system fault.
i.
Purge card is removed.
j.
Purge card is defective.