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50RTG specifications
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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*