Lochinvar Knight 50-210 - Manual (Page 46)

Installation & Operation Manual
46
10
Start-up
Check for gas leaks
Before starting the boiler, and during initial
operation, smell near the floor and around
the boiler for gas odorant or any unusual
odor. Remove the front access panel and
smell the interior of the boiler enclosure. Do
not proceed with startup if there is any
indication of a gas leak. Use an approved
leak detection solution. Repair any leaks at
once.
DO NOT adjust or attempt to measure gas
valve outlet pressure. 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.
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 room
thermostat terminals on the connection board.
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
corrected if necessary, reconnect the external thermostat
circuit wires to the connection board. Allow the boiler to
cycle.
Inspect/fill condensate system
Inspect/check condensate lines and fittings
1. Inspect the condensate drain line, condensate PVC fittings
and condensate trap.
Fill condensate trap with water
1. Remove the bezel as depicted in FIG. 8-1 on page 40 of this
manual.
2. Remove the PVC cap retaining screw from the PVC cap
(FIG. 10-1).
3. Remove the 2 inch PVC cap with the switch located at the
top of the trap (FIG. 10-1).
4. Fill with fresh water until the water begins to pour out of the
drain.
5. Replace the cap. Press the cap onto the trap until the cap
makes contact with the drain.
6. Replace the retaining screw.
7. Reinstall bezel.
The condensate trap (FIG. 10-1) 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.
Figure 10-1 Condensate Trap
ƽ WARNING
ƽ WARNING
ƽ WARNING
ƽ WARNING
Clean/Inspect Trap Assembly
1. Remove the clean out cap on the bottom of the trap. Let the
condensate and any debris drain out.
2. Refill the trap according to the instructions above.