Lochinvar 3.5, 2.5 Check for gas leaks, Check thermostat circuits, Inspect condensate system

9 Start-up(continued)

Check for gas leaks

Installation & Operation Manual

￿WARNING Propane boilers only – Your propane supplier mixes an odorant with the propane

￿WARNING

￿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 top 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.

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
	enable 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.)

Figure 9-1Condensate Trap

FROM CONDENSATE

VENT ON BOILER

FROM CONDENSATE

5. Once the external boiler enable wiring is checked and

corrected if necessary, reconnect the external thermostat

circuit wires to the connection board. Allow the boiler to

cycle.

Inspect condensate system

TO FLOOR DRAIN

DRAIN ON BOILER

OR NEUTRALIZER KIT

Inspect/check condensate lines and fittings

1” PVC / CPVC CONNECTION

1.Inspect the condensate drain line, condensate PVC fittings and condensate trap.

41