Startup - Fi Nal Checks - Weil-McLain Evergreen EVG 70 Manual

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Startup — fi nal checks
Check for gas leaks
Before starting the boiler, and during initial operation,
use a leak detector or smell near the fl oor and around
the boiler for gas odorant or any unusual odor. Remove
boiler jacket door and smell the interior of the boiler
jacket.
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
The gas valve is factory-set for the
outlet pressure.
correct outlet pressure. This setting is suitable for
natural gas and propane, requiring no fi eld 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
Propane boilers only
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 circuits
1. Disconnect wires connected to the
thermostat terminals (see Field wiring, beginning
Input 3
on page 54 for low voltage terminal locations and
application information). 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.
There should NEVER be a voltage reading.
4. If a voltage reading is measured across the incoming wires,
check and correct the external wiring.
DO NOT connect the EVG thermostat
terminals to 3-wire zone valves
cause control damage.
5. Once the external thermostat circuit wiring is checked and
corrected if necessary, reconnect the external thermostat
circuit wires.
Part number 550-100-191/0917
as-fired water boiler —
.
Input 1, Input 2 and
. This could
70/110/155
Inspect/fi ll condensate system
Inspect/check condensate lines and fi ttings
Remove fl oor stand front access panel to access the condensate trap.
Inspect the condensate drain line, condensate PVC fi ttings and
condensate trap. (See page 52 for component locations.)
Fill conde nsate trap with water
1. Slide condensate bracket away from trap then loosen the top nut
that secures the condensate trap body to the boiler condensate
connection (see Figure 81 ). Pull the trap down to disengage
from heat exchanger.
Figure 81 Disconnect condensate trap assembly to fi ll trap
body with water (front access panel removed)
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
condensate drain tube.
4. Reattach the trap body by sliding onto the boiler condensate
outlet, then retightening the trap body nut then reposition
bracket under the nut by sliding the bracket under the plastic
rivet in the bottom of enclosure.
The condensate trap must be fi lled with water during
all times of boiler operation to avoid fl ue gas emission
from the condensate drain line. Failure to fi ll the trap
could result in severe personal injury or death.
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