Carrier 50RTG Fig. 11 FP1 and FP2 Thermistor Location

SUCTION

COMPRESSOR

DISCHARGE

COAX

EXPANSION

VALVE

FP2 FP1

LIQUID

LINE WATER IN WATER OUT

CONDENSATE

OVERFLOW

(CO)

AIR COIL

FREEZE

PROTECTION

WATER

COIL

PROTECTION

THERMISTOR

°F°F

AIR

COIL

LEGEND

Fig. 11 — FP1 and FP2 Thermistor Location

COAX —Coaxial Heat Exchanger

Airflow

Refrigerant Liquid Line Flow

Contents

Main Installation, Start-Up, and Service Instructions CONTENTS SAFETY CONSIDERATIONS Rooftop Water Source Heat Pump Units 50RTG GENERAL INSTALLATION Step 1 Check Jobsite Installation, operation and Step 2 Check Unit Upon receipt of shipment at Step 3 Location of Unit The following guide- A CD Fig. 1 50RTG Dimensional Data E SIDE Supply 50RTGACURBAAAA 78.875 82.25 21.00 5.00 9.00 25.00 19.00 82.875 76.875 27.00 21.00 82.875 76.875 50RTGACURBBAAA 41.25 82.25 21.00 1.50 12.50 25.00 19.00 45.25 39.25 27.00 21.00 45.25 39.25 ROOF CURB J Step 4 Mounting the Unit For proper opera- Step 5 Condensate Drain Step 6 Piping Connections Depending on the Step 7 Electrical Wiring C Control Logic LEGEND Microprocessor G Table 3 50RTG Electrical Data Table 4 50RTG03 Blower Performance Table 5 50RTG04 Blower Performance Table 6 50RTG05 Blower Performance Table 7 50RTG07 Blower Performance Table 8 50RTG08 Blower Performance Table 9 50RTG10 Blower Performance Table 10 50RTG12 Blower Performance BC Table 11 50RTG15 Blower Performance Table 12 50RTG20 Blower Performance BC Step 8 Low Voltage Wiring System Checkout When the installation is complete FIELD SELECTABLE INPUTS C Control Jumper Settings (See Fig. 4) C Control DIP Switches The C Control has 1 DIP D Control Jumper Settings D Control DIP Switches The D Control has 2 DIP D Control Accessory Relay Configurations Water Valve (Slow Opening) If relay is config- Outside Air Damper (OAD) If relay is configured START-UP Operating Limits Scroll Compressor Rotation It is important to be Unit Start-Up Cooling Mode Unit Start-Up Heating Mode Flow Regulation Flow regulation can be accom- Flushing Once the piping is complete, final purging and Antifreeze In areas where entering loop temperatures Cooling Tower/Boiler Systems These systems Ground Coupled, Closed Loop and Plateframe Heat Exchanger Well Systems These systems al- OPERATION Power Up Mode The unit will not operate until all the Units with Aquazone Complete C Control Units with Aquazone Deluxe D Control SYSTEM TEST Test Mode To enter Test mode on C or D controls, cycle Retry Mode In Retry mode, the status LED will start to Aquazone Deluxe D Control LED Indica- tors There are 3 LED indicators on the D Control: SERVICE Filters Filters must be clean for maximum performance. Water C oil Keep all air out of the water coil. Check Condensate Drain Pans Check condensate drain Refrigerant System Verify air and water flow rates Condensate Drain Cleaning Clean the drain line Air Coil Cleaning Remove dirt and debris from evap- Condenser Cleaning Water-cooled condensers may Checking System Charge Units are shipped with Refrigerant Charging Air Coil Fan Motor Removal TROUBLESHOOTING (Fig. 10 and 11, and Table 22) Thermistor A thermistor may be required for single- Fig. 11 FP1 and FP2 Thermistor Location COAX Coaxial Heat Exchanger Airflow Refrigerant Liquid Line Flow Table 22 Troubleshooting Table 22 Troubleshooting (cont) Page Page HEATING CYCLE ANALYSIS COOLING CYCLE ANALYSIS 97B0014N02 *Use 500 for water, 485 for antifreeze. *97B0014N02*