Weil-McLain -230 - Manual (Page 8)

Part number 550-100-029/0404
GAS
-
FIRED WATER BOILER SERIES
2 — Control Supplement
8
Verify operation — space heating
(continued from previous page)
5. Allow boiler to bring water temperature to target
temperature.
[ 6180] (target temperature reached) The burner will shut
down. The blower will run in postpurge (see below),
then turn off. The boiler circulator continues to run as
long as there is a call for heat.
6. Lower room thermostat to stop call for heat.
[ 1180] (postpurge) When the room thermostat is satisfied
(call for heat ended), the burner turns off. The blower
will continue for a 15-second postpurge, then turn off.
(If another call for heat occurs, the boiler will remain
off for one minute before starting again, and the display
will show [
6180].)
[ 0180] (no call for heat) Boiler is now in standby mode
(waiting for heat call).
7. Repeat above steps several times to verify operation.
8. Return the room thermostat to normal setting.
Verify operation — DHW
1. Reconnect DHW aquastat wiring to boiler if
necessary.
2. Turn off power to boiler at service switch.
3. Wait a few seconds, then turn on power to boiler.
[ A180] (self-check on power-up, for a few seconds)
[
0180] (no call for heat)
4. Raise DHW aquastat above tank temperature, to call
for heat.
[
5180] (blower/circulator on) The blower and DHW
circulator energize and the control checks for air flow.
[ 1180] (prepurge) Blower speed will increase to ignition
speed. The blower will run in prepurge for 10 seconds.
[ 2180] (ignition) After prepurge, the control module opens
the gas valve and starts ignition spark.
a. If burner flame proves within 4.5 seconds, burner
continues to fire. Burner will fire at startup rate
— 50% of maximum input — for about 10
seconds to allow flame to stabilize.
b. If burner flame does not prove within 4.5 seconds,
control module attempts ignition sequence again.
Flame must prove within 5 attempts or control
will lockout (display will show [
E 02]).
c. Verify flame failure operation by closing boiler
manual gas valve to prevent gas flow. Open gas
cock after testing.
[ 4180] (burner on, DHW) Once flame is proven and stable,
the burner is allowed to modulate. Firing rate depends
on actual outlet water temperature versus target
temperature.
5. Allow boiler to bring water temperature to target
temperature.
[
6180] (target temperature reached) The burner will shut
down. The blower will run in postpurge (see below),
then turn off. The DHW circulator continues to run as
long as there is a call for DHW heating.
6. Lower DHW aquastat to stop call for heat.
[ 1180] (postpurge) When the room thermostat is satisfied
(call for heat ended), the burner turns off. The blower
will continue for a 15-second postpurge, then turn off.
(If another DHW call for heat occurs, the boiler will
begin the heating cycle immediately.)
[ 8180] (DHW circulator run-on) The DHW circulator
continues to run for 30 seconds.
[ 0180] (no call for heat) Boiler is now in standby mode
(waiting for heat call).
7. Repeat above steps several times to verify operation.
8. Return the DHW aquastat to normal setting.
Operating information
1. To check operating conditions (actual and target
temperatures, for example), see page 15 for an
explanation of the Ultra control module Information
mode.
2. During normal operation (no shutdown or lockout),
the right 3 display digits show actual boiler outlet
water temperature.
Perform Check-out procedures
1. Perform all steps of the Check-out/startup verification
listed in the Ultra Boiler Manual.
Replace boiler jacket front door
Replace boiler jacket front door after
servicing. The boiler front door must be
securely fastened to the boiler to prevent
boiler from drawing air from inside the
boiler room. This is particularly important
if the boiler is located in the same room as
other appliances. Failure to keep the door
securely fastened could result in severe
personal injury or death.
Startup
(continued)
2