Start-Up Checklist - Carrier 48FP Controls Operation And Troubleshooting

Single-package heating/cooling units with product integrated controls 50/60 hz

Table of Contents

MODEL NO.:

DATE:

I. PRE-START-UP:

VERIFY THAT UNIT IS LEVEL

VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

LOOSEN ALL SHIPPING HOLDDOWN BOLTS AND REMOVE SHIPPING BRACKETS PER INSTRUCTIONS

VERIFY THAT COMPRESSOR SUSPENSION SPRINGS HAVE BEEN LOOSENED PER INSTRUCTIONS

VERIFY OPENING OF ECONOMIZER HOOD

VERIFY INSTALLATION OF EXHAUST HOOD

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

VERIFY THAT POWER SUPPLY MATCHES UNIT DATA PLATE

VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

CHECK GAS PIPING FOR LEAKS (48 SERIES ONLY)

CHECK THAT INDOOR-AIR FILTERS ARE CLEAN AND IN PLACE

CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY

SET SCREW IS TIGHT

VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

OPEN SUCTION, DISCHARGE, AND LIQUID LINE SERVICE VALVES

CHECK COMPRESSOR OIL LEVEL SIGHT GLASS AND VERIFY PROPER LEVEL

VERIFY THAT CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR 24 HOURS

CHECK VOLTAGE IMBALANCELINE-TO-LINE VOLTS:

(AB + AC + BC)/3 = AVERAGE VOLTAGE = _______V

MAXIMUM DEVIATION FROM AVERAGE VOLTAGE = _______V

VOLTAGE IMBALANCE = 100 X (MAX DEVIATION)/(AVERAGE VOLTAGE) = _______ %

IF OVER 2% VOLTAGE IMBALANCE, DO NOT ATTEMPT TO START SYSTEM!

CALL LOCAL POWER COMPANY FOR ASSISTANCE

II. PRELIMINARY CHECKLIST ITEMS

CONTROL SETTINGS FOR NON-NETWORKED, FREESTANDING UNIT

UNIT TO BE OPERATED ON VARIABLE AIR VOLUME (VAV) RATHER THAN CONSTANT VOLUME (CV)

CONFIRM THAT SPACE TEMPERATURE SENSOR (T-55) HAS BEEN WIRED CORRECTLY PER

SPACE TEMPERATURE SENSOR (T-55) SECTION ON PAGE 34

CONFIRM THAT TUBING FOR SPACE AND SUPPLY DUCT PRESSURES HAS BEEN INSTALLED

SET ENTHALPY CONTROL SET POINT ON ECONOMIZER

SET SUPPLY FAN AND "CHECK FILTER" STATUS SWITCHES FOR JOB REQUIREMENTS

UNIT OPTION CHECKLIST

PRESENT?

VARIABLE VOLUME POWER EXHAUST

VARIABLE FREQUENCY DRIVE ON SUPPLY FAN (VAV ONLY)

HOT GAS BYPASS

VAV WITH OCCUPIED HEAT

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111

Catalog No. 534-738

Book 1 1

Tab 1a 1b