Lochinvar WH 55-399 Check for gas leaks Inspect/fill condensate system, Check thermostat circuits

10 Start-up

Check for gas leaks

Installation & Operation Manual

Inspect/fill condensate system

￿WARNING

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.

Inspect/check condensate lines and fittings

1.	Inspect the condensate drain line, condensate fittings and
	condensate trap.
2.	Fill condensate trap with enough water to make the ball
	float (FIG. 10-1).
3.	Loosen compression fitting (FIG. 10-1).
4.	Slide condensate trap onto condensate drain at the bottom

￿WARNING

DO NOT adjust 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 the gas valve outlet pressure could result in damage to the valve, causing potential severe personal injury, death, or substantial property damage.

of the unit.
5. Tighten compression fitting.
	The condensate trap (FIG. 10-1) must have
￿ WARNING
	the float ball in place during all times of

boiler operation to avoid flue gas emission from the condensate drain line. Failure to ensure the float ball is in place could result in

￿WARNING

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.

severe personal injury or death.

Figure 10-1Condensate Trap

COMPRESSION

FITTING

Check thermostat circuit(s)

1.Disconnect the two external wires connected to each of the heat/loop demand 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.

CONDENSATE

DRAIN

FLOAT BALL

REMOVABLE CAP TO

CLEAN OUT TRAP

IMG00209

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.

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