Weil-McLain GOLD CGt Manual page 42

GOLD CGt Gas-Fired Water Boiler — Boiler Manual
10b
Service and maintenance – annual start-up
❏
Gas piping
1. Sniff near floor and around boiler area for any in-
dication of a
Test gas piping using bubble test,
.
of this manual, if there is any indication of a leak.
Cold fill and operating pressures
1. While the system is cold, note the
on the boiler pressure/temperature gauge. Verify that
cold fill pressure is correct.
Watch the pressure
.
up to ensure pressure rise is normal. Too high a rise
would indicate a waterlogged or undersized expan-
sion tank.
Air vents and air elimination
1. Inspect automatic air vents (if used). Also inspect
air separators to ensure they are operational.
. The cap must be unscrewed one turn to allow air to
escape.
3. See
A
the valve seat.
4. Replace cap
and then unscrewing one turn.
4
Check/test . . .
gas leak
.
as the boiler and system heat
Figure 31
. If the air vent is leaking, remove cap
B
and briefly push valve and then release to clean
A
by twisting all the way onto valve
Figure 31
5
per Section
pressure reading
Limit controls and cutoffs
1. Inspect and test the boiler limit control. Verify op-
eration by turning control set point below boiler
temperature. Boiler should cycle off. Return dial to
original setting.
. Inspect and test additional limit controls or low
water cutoffs installed on system.
Expansion tank
1. Expansion tanks provide space for water to move
in an out as the heating system water expands due
to temperature increase or contracts as the water
cools. Only diaphragm-type or bladder-type tanks
should be used with CGt boilers. See Section
B
this manual for suggested best location of expansion
tanks and air eliminators.
Automatic air vent, typical
Part Number 550-110-290/0107
(cont.)
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