38
Start-Up Procedures
Set Domestic DHW Temperature
1. Press the MODE button until the display
shows PARA. This is the parameter mode
of the control.
2. Press the STEP button until the first digit
on the display shows “1”. The last three
digits on the display shows the domestic
hot water storage temperature.
3. Press the “+” or “-” button to change the
setting of the storage temperature setting.
4. Press the “STORE” button to save the set-
ting.
Factory setting of Parameter 1 is 140ºF.
The temperature range of Parameter 1 is
68ºF to 140ºF. Any setting lower than the
factory setting of 140ºF will affect
domestic capacity and performance.
Digits and characters shown as [
0
00
00
00
0
],
in the following outline, represent the
control panel display. The last three dig-
its on the display is the measured prima-
ry water temperature and is shown in
the manual with
[
---
]
.
Operation Verification - Domestic Hot
Water.
1. Press and hold the “+” button for 2 sec-
onds. The display should flash a “c” follow
by “OFF” indicating the CH mode has been
disabled. Parameter 3 should read as “00”
for a verification.
2. Raise the DHW setting (Parameter 1) if
needed to initiate a call for heat. The dis-
play should show:
[
A---
] Self check on Power up.
[
0---
] no call for heat request.
[
1---
] The prepurge cycle. The blower
becomes energized and the 10 second pre-
purge cycle begins.
[
2---
] The burner will begin the ignition
sequence. The control module will energize
and open the gas valve and begin the spark
for ignition.
-
If the burner flame proves within 4.5 sec-
onds, the burner will begin to modulate to
full input rate after an approximate 10
second flame stabilization period.
-
If the burner flame is not proven within
4.5 seconds, the control module will
repeat the ignition sequence. If the
flame is not proven after 5 attempts, the
control will lockout and display [
E-
02
]
-
To verify flame failure lockout, close
the manual shut off valve on the gas
supply piping to the appliance and
repeat ignition sequence. When verifi-
cation is complete, ensure the manual
shut-off valve is returned to the open
position.
[
4---
] This indicates normal operation
for DHW. The burner will begin modulat-
ing its input based on the length of demand
for DHW. The burner will not go into the
low input rate for the 1 minute flame stabi-
lization period that occurs in CH central
heating mode.
3. Lower the DHW set point (Parameter 1) to
satisfy the call for heat.
[
1---
] The post purge cycle begins. The
control module closes the gas valve and the
blower continues for a 30 second post
purge.
[
0---
] Appliance is in standby MODE
waiting for a CH or DHW call for heat.
4. Verify the DHW operation of the appliance
by repeating the operation sequence sever-
al times.
NOTICE
NOTICE
