Weil-McLain PLUS LINE PLUS-E017-A/1206 - Manual (Page 34)

Part Number PLUS-E017-A/1206
PLUS LINE
Indirect-Fired Water Heaters – Series 3
Start-up — Gas boilers only
(continued)
B4
Gas
[ 3180] (burner on, space heating) Once flame is proven
and stable, the burner turns down to low fire for ap-
proximately 2 minutes.
• After this low fire period, the burner is allowed to
modulate. Firing rate depends on actual outlet water
temperature versus target temperature.
. 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.
. Lower room thermostat to stop call for heat.
[ 1180] (postpurge) When the room thermostat is satis-
fied (call for heat ended), the burner turns off. The
blower will continue for a 1-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).
. Repeat above steps several times to verify opera-
tion.
8. Return the room thermostat to normal setting.
Verify water heater operation
1. Reconnect PLUS aquastat wiring to boiler if neces-
sary.
2. Turn off power to boiler at service switch.
. 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)
. Raise PLUS aquastat above tank temperature, to
call for heat.
[ 5180] (blower/circulator on) The blower and PLUS circu-
lator energize and the control checks for air flow.
[ 1180] (prepurge) Blower speed will increase to igni-
tion 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 . seconds, burner
continues to fire. Burner will fire at start-up
rate — 0% of maximum input — for about 10
seconds to allow flame to stabilize.
b. If burner flame does not prove within . sec-
onds, control module attempts ignition sequence
again. Flame must prove within 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, PLUS) Once flame is proven and
stable, the burner is allowed to modulate. Firing rate
depends on actual outlet water temperature versus
target temperature.
. 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 PLUS circulator continues to run
as long as there is a call for PLUS heating.
. Lower PLUS 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 1-second postpurge, then turn off.
(If another PLUS call for heat occurs, the boiler will
begin the heating cycle immediately.)
[ 8180] (PLUS circulator run-on) The PLUS circulator
continues to run for 0 seconds.
[ 0180] (no call for heat) Boiler is now in standby mode
(waiting for heat call).
. Repeat above steps several times to verify opera-
tion.
8. Return the PLUS aquastat to normal setting.
Operating information
1. To check operating conditions (actual and target
temperatures, for example), see Gas Boiler
Manual for an explanation of the control
module Information mode.
2. During normal operation (no shutdown or lock-
out), the right display digits show actual boiler
outlet water temperature.
Replace jacket front door
Replace boiler jacket front door after
installation or 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 appli-
ances. Failure to keep the door securely
fastened could result in severe personal
injury or death.