3.Measure the system Amperage draw across all legs of 3 phase power wires.
4.Measure the condenser fan amp draw.
SHUT DOWN
1.Set the thermostat to highest temperature setting.
2.Turn off the electrical power to the unit.
START-UP (GAS HEAT)
PRE-START CHECK LIST
Complete the following checks before starting the unit.
1.Check the type of gas being supplied. Be sure that it is the same as listed on the unit nameplate.
2.Make sure that the vent and combustion air hoods have been properly installed.
OPERATING INSTRUCTIONS
This furnace is equipped with an intermittent pilot and automatic
TO LIGHT PILOT AND MAIN BURNERS:
1.Turn “off” electric power to unit.
2.Turn room thermostat to lowest setting.
3.Turn gas valve knob or switch to “on” position.
4.Turn “on” electric power to unit.
5.Set room thermostat to desired temperature.
(If thermostat “set” temperature is above room tem- perature, pilot burner ignition will occur and, after an interval to prove pilot flame, main burners will ignite).
TO SHUT DOWN:
1.Turn “off” electric power to unit.
2.Depress knob of gas valve while turning to “off” position or turn gas valve switch to “off” position.
POST-START CHECK LIST (GAS)
After the entire control circuit has been energized and the heating section is operating, make the following checks:
1.Check for gas leaks in the unit piping as well as the supply piping.
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARN- ING EXACTLY COULD RESULT IN SERIOUS INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN OPEN FLAME. USE A COMMERICALLY AVAILABLE SOAP SOLUTION MADE SPE- CIFICALLY FOR THE DETECTION OF LEAKS TO CHECK ALL CONNECTIONS. A FIRE OR EXPLOSION MAY RESULT CAUS- ING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
2.Check for correct manifold gas pressures. See “Checking Gas Input” page 44.
3.Check the supply gas pressure. It must be within the limits shown on rating nameplate. Supply pres- sure should be checked with all gas appliances in the building at full fire. At no time should the standby gas line pressure exceed 13", nor the operating pressure drop below 5.0" for natural gas units. If gas pressure is outside these limits, con- tact the local gas utility for corrective action.
FIGURE 21 - TYPICAL GAS VALVES
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