Weil-McLain 2 Series Manual page 61

series
GV90+
Start-up
(continued)
Check for gas leaks
Before starting the boiler, and during initial
operation, use a leak detector or smell near the
floor and around the boiler for gas odorant or
any unusual odor. Remove boiler front door
and smell interior of boiler enclosure. Do not
proceed with startup if there is any indication
of a gas leak. Repair any leak at once.
DO NOT adjust or attempt to measure gas
valve outlet pressure except where instructed
specifically in this manual. This setting is suit-
able for natural gas and propane, requiring no
field adjustment. Attempting to alter or measure
the gas valve outlet pressure without following
the correct procedures could result in damage
to the valve, causing potential severe personal
injury, death or substantial property damage.
Propane boilers only — Your propane supplier
mixes an odorant with the propane to make
its presence detectable. In some instances, the
odorant can fade, and the gas may no longer
have an odor. Before startup (and periodically
thereafter), have the propane supplier verify the
correct odorant level in the gas.
Check thermostat circuit(s)
1. Disconnect the two external wires connected to the boiler ther-
mostat terminals (see Field wiring, beginning on
terminal locations).
2. Connect a voltmeter across these two incoming wires. Close each
thermostat, zone valve and relay in the external circuit one at a
time and check the voltmeter reading across the incoming wires.
3. There should NEVER be a voltage reading.
4. If a voltage does occur under any condition, check and correct
the external wiring. (This is a common problem when using
3-wire zone valves.)
5. Once the external thermostat circuit wiring is checked and cor-
rected if necessary, reconnect the external thermostat circuit
wires. Allow the boiler to cycle.
Part number 550-143-010/1021
gas-fired water boiler – boiler manual
2
page 55
Inspect/fill condensate system
Inspect/check condensate lines and fittings
Inspect the condensate drain line and the condensate trap.
Fill condensate trap with water
1. Remove the hose clamp (Figure 71, item 4) that secures
the condensate trap (Figure 71, item 1) to the bottom of
the recuperator (Figure 71, item 2).
2. Pull the condensate trap off of the recuperator conden-
sate drain nipple.
3. Use a funnel to feed water into the top of the conden-
sate trap.
4. Continue filling until water begins to flow out through
the condensate drain line (Figure 71, item 3).
5. Slide hose clamp around recuperator base between vent
and recuperator body then through slot on top of the
condensate trap.
6. Secure with the hose clamp.
7. Check for any leaks in the condensate drain line or trap.
Repair any leaks.
The condensate trap must be filled with water
during all times of boiler operation to avoid
flue gas emission from the condensate drain
line. Prime the condensate trap by pouring
water into the top of the trap until water flows
out the drain tube if boiler has been out of
service for an extended period. Failure to fill
the trap could result in severe personal injury
or death
for
Condensate trap assembly
Figure 71
61