Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480028-01
Printed in U.S.A.
Form 48/50PG-5T
Pg CL-6
6-06
Replaces: 48/50PG-2T
Copyright 2006 Carrier Corporation
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Book 1
1
Tab
1a 1b
UNIT START-UP CHECKLIST
MODEL NO.:___________________________________________
SERIAL NO.:______________________________________________
DATE:_________________________________________________
TECHNICIAN: ____________________________________________
I. PRE-START-UP:
VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT
VERIFY INSTALLATION OF OUTDOOR AIR HOOD
VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD (48PG ONLY)
VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS
VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT
VERIFY GAS PRESSURE TO UNIT GAS VALVE IS WITHIN SPECIFIED RANGE (48PG ONLY)
CHECK GAS PIPING FOR LEAKS (48PG ONLY)
CHECK THAT INDOOR-AIR FILTERS ARE CLEAN AND IN PLACE
CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE
VERIFY THAT UNIT IS LEVEL
CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SETSCREW
IS TIGHT
VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED
VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION
VERIFY INSTALLATION OF THERMOSTAT/SPACE SENSOR
VERIFY INSTALLATION OF HUMIDITY SWITCH/SENSOR (HUMIDI-MIZER™ UNITS ONLY)
VERIFY CONFIGURATION VALUES FOR ELECTRONIC CONTROLS (REFER TO CONTROL SET UP CHECKLIST)
VERIFY THAT CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR AT LEAST 24 HOURS
II. START-UP
ELECTRICAL
TEMPERATURES
PRESSURES
VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 89 AND 90
GENERAL
ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS
SUPPLY VOLTAGE
L1-L2
L2-L3
L3-L1
COMPRESSOR AMPS — COMPRESSOR A1
L1
L2
L3
— COMPRESSOR B1
L1
L2
L3
ELECTRIC HEAT AMPS (IF EQUIPPED)
L1
L2
L3
SUPPLY FAN AMPS
L1
L2
L3
OUTDOOR-AIR TEMPERATURE
F DB (Dry Bulb)
RETURN-AIR TEMPERATURE
F DB
F WB (Wet Bulb)
COOLING SUPPLY AIR
F
GAS HEAT SUPPLY AIR (48PG)
F
ELECTRIC HEAT SUPPLY AIR (50PG)
F
GAS INLET PRESSURE
IN. WG
GAS MANIFOLD PRESSURE STAGE NO. 1
IN. WG
STAGE NO. 2
IN. WG
REFRIGERANT SUCTION
CIRCUIT A
PSIG
CIRCUIT B
PSIG
REFRIGERANT DISCHARGE CIRCUIT A
PSIG
CIRCUIT B
PSIG
Summary of Contents for 48PG24
Page 68: ...68 Fig 14 Low Voltage Control Schematic 48PG20 28 Units without Humidi MiZer System a48 7627...
Page 69: ...69 Fig 15 Low Voltage Control Schematic 48PG20 28 Units with Humidi MiZer System a48 8227...
Page 70: ...70 Fig 16 Low Voltage Control Schematic 50PG20 28 Units without Humidi MiZer System a48 7778...
Page 71: ...71 Fig 17 Low Voltage Control Schematic 50PG20 28 Units with Humidi MiZer System a50 8101...
Page 72: ...72 Fig 18 Power Schematic Units without Humidi MiZer System a48 7628...
Page 73: ...73 Fig 19 Power Schematic Units with Humidi MiZer System a48 8228...
Page 74: ...74 Fig 20 Component Arrangement Units without Humidi MiZer System a48 8229...
Page 75: ...75 Fig 21 Component Arrangement Units with Humidi MiZer System a48 8230...
Page 105: ......