Carrier NP034-074 User Manual

Page 49

AUTOMATIC PILOT ADJUSTMENT (48 Series Units Only)
1. Set system selector switch at OFF position to shut off unit.

Turn off power to unit.

2. Remove screw cap cover on pilot gas valve to expose

adjusting screw.

3. To ensure that main burners do not ignite, remove wire

from gas valve terminal 2. Tape wire. Do not allow wire
to be grounded.

4. Turn on power to unit. Set system selector switch to HEAT

position and set thermostat to a setting that will call for
heat. Pilot ignites.

5. With a small screwdriver, turn adjustment screw until flame

fully engulfs sensor.

6. Replace cap on pilot gas valve. Turn off power to unit.

Return valve(s) to original position.

7. Check for proper burner operation by cycling the burn-

ers. Wait 30 seconds between burner cycles.

8. Check that all panels are closed securely before leaving

the unit.

Fig. 55 — Charging Chart, 054 Units; System 2,