39
Start-Up Procedures
5. Return the DHW setpoint (Parameter1) and
room thermostat to the desired setting.
6. Press and hold the “+” button for 2 seconds
to enable the space heating, the display will
flash a “c” followed by the CH setpoint
temperature. Parameter 3 should read as
“01” for a verification.
Set Primary CH Target 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 "4". The last three
digits on the display shows the outlet water
temperature setting (high limit).
3. Press the "+" or "-" button to change the set-
ting of the outlet temperature (high limit).
If an outdoor sensor is used, then the set-
ting of the primary CH Target tempera-
ture is the target temperature when the
outdoor temperature is at or below 0ºF.
When the outdoor temperature is higher
than 0ºF the control will calculate the tar-
get temperature between the minimum
and maximum temperature settings.
4. Press the "STORE" button to save the setting.
Operation Verification - Space Heating
Digits and characters shown as [
0
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 [
-
--
--
-
] .
1. Press and hold the “-” button for 2 seconds.
The display should flash a “d” follow by
“OFF” indicating the DHW mode has been
disabled Parameter 2 should read as “00”
for a verification.
2. Set the room thermostat to the lowest setting.
3. Turn off power to the appliance, wait a few
seconds and turn on power to the appliance.
4. The following displays should occur:
[
A---
] Self check on power up
[
0---
] No call for heat
5. Initiate a call for heat by raising the set
point of the room thermostat to the highest
setting. The following display should
occur.
[
1---
] This is the prepurge cycle. The
blower and the CH circulator become ener-
gized. The blower has a 10 second prepurge
cycle.
[
2---
] This is the ignition cycle. The con-
trol module will energize and open the gas
valve and begin the spark for ignition.
-
If the burner flame proves within 4.5
seconds, the burner will continue to fire
at an ignition fan speed for approxi-
mately 10 seconds to stabilize the
flame.
-
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 the display will
show [
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 completed, ensure the manual
shut off valve is returned to the open
position.
[
3---
] This is the normal operation cycle.
After the flame is proven and stabilized
the burner will fire at low input for
approximately 1 minute. After this time
period, the control module will begin to
modulate the burner firing rate based on
actual primary outlet temperature and the
set point temperature.
NOTICE
NOTICE
