Thermo Products CHB1-100N Initial Start UP, Operating Instructions, Adjustment of BTU Input Rate

All installations and services must be performed by qualified service personnel.

B. INITIAL START UP:

This furnace does not have a pilot. It is equipped with a hot surface igniter, which automatically lights the burner. Do not attempt to light the burner by hand. Check the following items before the initial start-up.

1.Check all wiring for loose connections and proper hook up.

2.Leak test gas piping connections.

3.Check all tubing to the pressure switch and drains to make sure they are connected firmly at all their connection points.

4.Check flue pipe, combustion air inlet and all PVC connections for tightness and to make sure there is no blockage.

5.Make sure air filter is in place.

6.Make sure the outside vent and air intakes are installed according to instructions and that they are free from blockage.

7.Make sure that the drain trap is properly connected to the furnace and to the buildings drain system.

OPERATING INSTRUCTIONS:

: Turn off power to furnace before it is placed into service. The gas piping system must have been leak tested by a qualified heating contractor. (See Section III, J, of these instructions on the installation of gas piping).

: It may be necessary to purge the air out of the gas line for initial start-up of the furnace after installation. This should be done by a qualified heating contractor. If excessive gas escapes when purging the gas supply at the union, allow the area to ventilate for at least 15 minutes before attempting to start the furnace. LP gas is especially dangerous because the specific gravity of LP gas allows it to accumulate at floor level at a dangerous concentration. For remainder of operating instructions, reference Users Information Manual.

: Heat exchanger oil will burn off on initial firing creating an unpleasant odor. To prevent this odor from occurring more than once, it is suggested that:

1.A window(s) be opened.

2.The thermostat be set at highest setting.

3.The furnace remain running at conditions 1&2 for 30 minutes or until odor has dissipated.

C. ADJUSTMENT OF BTU INPUT RATE

The Orifice for this furnace was sized: 1) for natural gas having a heating value of 1025 BTU per cubic foot and a specific gravity of .65, or 2) for liquefied propane gas with a heating value of 2500 BTU per cubic foot and a specific gravity of 1.55. The information plate inside the furnace vestibule will specify which gas your furnace is orificed for. If the furnace is installed at an altitude that is more than 2,000 feet above sea level, it is mandatory that the input to the burner be reduced 4.0% for every 1,000 feet that it is above sea level. If the furnace is installed at an elevation of 5,000 feet, its input must be reduced 20.0%. Example: a furnace rated at 100,000 BTU at sea level must be reduced to a firing rate of 80,000 (100,000 X .80 = 80,000) at an elevation of 5,000 feet. If the furnace is installed at an elevation of 2,000 feet or less, no reduction in input is required. Your gas supplier will supply you with the correct orifice sizing information.

To check the input of your natural gas furnace, allow the unit to operate for 10 to 15 minutes and proceed as follows:

a.Call your gas supplier and ask for the BTU content (heating value) of one cubic foot of the gas, supplied to the installation area. An alternate approach is to assume a value of 1025 BTU/Cu Ft, which is the national average.

b.With all other gas appliances turned off and using a stopwatch, clock the time required for the (small) dial on the gas meter to make one full revolution. The meter will state how many cubic feet is flowed for one revolution usually one, two or five. The unit must have been in operation at least 10 minutes before clocking.

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