STARTUP AND OPERATIONAL CHECKOUT
It is not recommended that this furnace be used as a construction heater during any phase of construction. Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit. The unit may only be used for heating of buildings or structures under construction, if the conditions listed on page 6 in the "Introduction" section of these instructions are met.
The automatic gas valve controls the flow of gas to the main burners. The control circuit built into the automatic valve body has 2 positions: "OFF" and "ON" (Figure 13). To shut off gas manually: Switch from "ON" to "OFF" position. When in "OFF" position, the main burners are extinguished.
This furnace is equipped with an automatic hot- surface ignition control and does not require the manual lighting for furnace operation.
Figure 13
GAS CONTROL DIAGRAM
Do not attempt to manually light the burners. Failure to follow this warning can lead to electrical shock that could result in bodily harm.
After the ductwork connections have been made, gas piping and electrical wiring completed and the furnace has been properly vented, the unit should be started and adjusted for proper operation. Check off the following steps as they are completed.
1.Be sure all electrical power is OFF.
2.Check all wiring using proper wiring diagram on inside of the control box cover.
3.Turn ON the electrical power.
4.Set the ignition system control switch in the "ON" position.
5.Set the thermostat above room temperature.
6.The
Figure 14
TYPICAL FLAME APPEARANCE
(Main Burners)
7.Recheck for leaks in the manual shut off valve, gas control valve and gas connections using a soap solution.
Never use an open flame when testing for gas leaks! Use of an open flame could lead to a fire or explosion.
Many soaps used for leak testing are corrosive to certain metals. Piping must be rinsed thoroughly with clean water after leak check has been completed.
Manifold Pressure Adjustment:
Turn OFF the gas and electrical before preceeding! Remove the manifold pressure tap pipe plug from the gas valve (Figure 13 outlet pressure tap) and install a pressure tap and connect it to a manometer. Turn on the gas and electrical supplies.
20571201 | Issue 0527 | Page 19 of 28 |
