Lochinvar EnergyRite ER302 - Manual (Page 43)

10
Operating information
(continued)
Installation & Operation Manual
43
OPERATION DISPLAY
1. Upon a call for heat, the control module will look at the
high limit, the water pressure switch, and the auxiliary
safeties. If any of these devices are open, the control
module will not initiate an ignition sequence. POOL: Standby
POOL TEMP: 78°F
2. The control will enter the Pre-Purge Mode. After five
seconds it will begin to look for the air pressure switch
to be closed. It will also look to see that the proving
switch is closed. A total of 65 seconds will be allowed
for this switch to close.
POOL: Standby
POOL TEMP: 78°F
3. Once both the air pressure switch and the proving
switch are sensed closed the blower will provide an
additional pre-purge time of 15 seconds before
initiating a trial for ignition. The maximum pre-purge
time possible is 65 seconds.
POOL MODE PREPURGE
4. Once the prepurge period is complete, the control
module starts the 8 second trial for ignition by
sending spark voltage to the spark electrode and
opening the gas valve.
POOL MODE IGNITION
5. If the control module does not detect flame by the
end of the trial for ignition period, the control module
will close the gas valve and initiate a 15 second
prepurge period. After the prepurge period another
trial for ignition sequence will begin. If the control
module does not detect flame by the end of the 4th
trial for ignition period, the control module will
lockout and display ignition failure in the display.
POOL MODE PREPURGE, IGNITION,
LOCKOUT IGNITION FAILURE
6. If the control module detects a flame before the trial
for ignition period ends, the spark shall be
de-energized and the gas valve will remain open.
POOL: Heating
POOL TEMP: 78°F
7. Once the call for heat has been satisfied, the control
module will de-energize the gas valve. The blower will
continue to run for a 15 second post purge time.
POST PURGE POOL MODE
8. The unit waits for the next call for heat.
POOL: Standby
POOL TEMP: 78°F
Sequence of operation