Carrier 62X Series - Page 111

CL-11
Filter Status (in filter section)
 With the fan operating at high speed, turn the adjustment screw counterclockwise until the flag drops
 Turn the adjustment screw 1-1/2 turns clockwise and reset the flag
Exhaust Fan (if equipped)
 The exhaust fan is rotating in the correct direction
 The exhaust fan is operating without vibration or other issue
 The barometric exhaust damper is open and moves freely
 Force the exhaust fan to 100% operation and record the amp draw on the start up log
Cooling
Note: cooling & dehumidification can only be performed when the outdoor air temperature is above 55°F
 Verify all condenser fans are rotating and rotation direction is correct
 Verify all condenser fans are rotating without vibration or other issue
 Verify the compressor(s) are operating and compressor rotation is correct
 Verify the compressor(s) are operating without vibration or other issue. Note: size 03-018 units have a lead circuit
digital compressor that will unload/load during operation, leading to some vibration and noise
 Verify the outdoor air temperature on the startup log, if above 55°F proceed with cooling startup
 (62W only) verify entering water flow and entering water temperature above 55°F
 With the compressor(s) operating, subcooling reheat operating (if equipped), and hot gas reheat (HGRH) operating
at 100%, record the following information in the startup log:
· Compressor amp draw (all compressor)
· Evaporator coil leaving air temperature (DXLAT)
· Unit supply air temperature (SAT)
· (62W only) entering condenser water temperature (EWT) and condenser water flow rate
 With the compressor(s) operating, subcooling reheat operating (if equipped), and hot gas reheat (HGRH)
disabled
, record the following information in the startup log:
· Suction line temperature (all circuits)
· Suction line pressure (all circuits)
· Discharge line temperature (all circuits)
· Discharge line pressure (all circuits)
· Record the compressor oil level (where available)
Energy Recovery Wheel (if equipped)
 The exhaust fan is rerating without vibration or other issue
 The ECW bypass damper (if equipped) is closed when the ECW is rotating
 Force the ECW to 100% operation and record the amp draw on the start up log
 For units with ECW defrost, for the ECW to 10% speed and verify the wheel slows down
Gas Heat (if equipped)
 Verify inducer fan operation
 Verify spark and ignition
 With the supply fan operation at 100% speed or the balanced speed and the gas heat operating at high fire (100%
capacity), record the following information in the startup log:
· Outdoor air temperature (OAT)
· Unit supply air temperature (SAT)
· Inlet pressure (all furnaces)
· Manifold pressure (all furnaces)
· Flue gas CO and CO
2
levels (all furnaces)
· Inducer draft fan pressure (all furnaces)