Expansion Tank Check; Gauges Check; Igniter Check; Igniter Observation Port In Blower View - Weil-McLain Gold GV Manual

• Installation • Start-Up • Parts • Maintenance
Annual start-up —
check/test
Part number 550-141-856/0703
Expansion tank
1. Expansion tanks provide space for water to move in and out as the heating system water
expands due to temperature increase or contracts as the water cools. Tanks may be open-,
closed-, diaphragm- or bladder-type. See Section
of expansion tanks and air eliminators.
— Located above highest radiator or baseboard unit, usually in the attic or
Open-type
closet. Has a gauge glass and overflow pipe to a drain.
— Welded gas tight and located above boiler. Tank is partially filled with
Closed-type
water, leaving an air cushion for expansion.
• Make sure this type of tank is fitted with a
Trol or Taco Taco-Trol. This fitting reduces gravity circulation of air-saturated tank
water back to the system and prevents the air from bubbling up through the water
as it returns from the system.
•
Do not use automatic air vents in systems with closed-type tanks
will escape from the system instead of returning to the tank. Eventually, the tank
will waterlog and no longer control pressurization. The boiler relief valve will weep
frequently.
Diaphragm- or bladder- type
the pressurizing air and the water. May be located at any point in the system, but most often
found near the boiler.
• Systems with this type of expansion tank require at least one
preferably located on top of an air eliminator, as shown in examples in manual
Section .
III
2. If relief valve has tended to weep frequently, the expansion tank may be waterlogged or
undersized.
— Tank is most likely waterlogged. Install a tank fitting if not already
Closed-type tank
installed. Then check fill level per fitting manufacturer's instructions. If fill level is correct,
check tank size against manufacturer's instructions. Replace with a larger tank if necessary.
Diaphragm- or bladder type
system. If size is too small, add additional tank(s) as necessary to provide sufficient
expansion. If tank size is large enough, remove tank from system and check charge pressure
(usually 12 psig for residential applications). If tank won't hold pressure, membrane has
been damaged. Replace tank.
Gauges
1. Boiler pressure/temperature
gauge — Inspect gauge and
check whether readings are
reasonable. Replace if any signs
of leakage from case or
improper readings.
2. System gauges (if installed) —
Inspect and check readings of
other gauges in system.
Igniter
1. Verify igniter operation —
Look through blower
observation port (see Figure
29). Access the blower by
removing the boiler jacket front
panel if not already removed.
of this manual for suggested best location
III
, such as the B & G Tank-
tank fitting
— Welded gas tight with a rubber membrane to separate
— First, check tank size to be sure it is large enough for the
Figure 29 Igniter observation port in blower
. The air
automatic air vent ,
61