Startup - Final Checks - Weil-McLain ECO 70 Manual

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AS FIRED WATER BOILER
Startup — final checks
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 jacket door and smell the interior of the boiler
jacket.
The gas valve is factory-set for the correct
outlet pressure. This setting is suitable for natural gas
and propane, requiring no field adjustment. Attempting
to alter or measure the gas valve outlet pressure could
result in damage to the valve, causing potential severe
personal injury, death or substantial property damage.
— Your propane supplier mixes
an odorant with the propane to make its presence de-
tectable. 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 circuits
1. Disconnect wires connected to the
mostat terminals (see Field wiring, beginning on page 56
for low voltage terminal locations and application infor-
mation). Mark the wires before removing to avoid wiring
errors when re-connecting them.
2. Connect a voltmeter across each pair of incoming wires.
Close each thermostat, zone valve and relay in the external
circuits one at a time and check the voltmeter reading
across the incoming wires.
3.
4. If a voltage does occur under any condition, check and
correct the external wiring.
ECO control damage.
5. Once the external thermostat circuit wiring is checked and
corrected if necessary, reconnect the external thermostat
circuit wires.
Part number 550-142-122/0513
— Boiler Manual
Inspect/fill condensate system
1. Inspect the condensate drain line, condensate PVC fittings and
condensate trap. (See page 54 for component locations.)
1. Loosen the top nut that secures the condensate trap body to
the boiler condensate connection (see Figure 84). Pull the trap
down to disengage from heat exchanger.
.
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2. Pull the trap body forward enough to allow pouring water into
the top of the trap.
3. Fill the trap with fresh water until water begins to run into the
ther-
condensate drain tube.
4. Reattach the trap body by sliding onto the boiler condensate
outlet, then retightening the trap body nut.
-
. This could cause
Disconnect condensate trap assembly to fill trap
body with water
Nut
The condensate trap must be filled with water during
all times of boiler operation to avoid flue gas emission
from the condensate drain line. Failure to fill the trap
could result in severe personal injury or death.
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