Carrier 50HQP072-120 - page 9

9

Determine percent voltage imbalance.

= 0.95%

This amount of phase imbalance is satisfactory as it is

below the maximum allowable 2%.

Operation on improper line voltage or excessive phase

imbalance constitutes abuse and may cause damage to electri-

cal components.

NOTE: If more than 2% voltage imbalance is present, contact

local electric utility.

EXTERNAL LOOP POWER CONNECTION — If the unit

is to be connected to an external loop pump or flow controller,

connect the pump to the loop pump terminal block PB1. The

maximum power handling is 4 amps at 240 volts. The pumps

will automatically cycle as required by the unit.

420-VOLT OPERATION — All 380/420 volt units are factory

wired for 380 volts. The transformers may be switched to

420-volt operation (as illustrated on the wiring diagram) by

disconnecting the VIO lead at L1 and attaching the BRN lead

to L1. Close open end of VIO lead.

% Voltage Imbalance = 100 x 4

421

Pressure-

Temperature

Plugs

Boiler

Drains

Strainer – Field-Installed Accessory

(16 to 20 mesh recommended for

filter sediment)

Shut-Off

Valve

Water

Control

Valve

Automatic

Balance Valve

Expansion

Tank

Water Out

Water In

From Pump

Fig. 11 — Typical Ground-Water Piping Installation

a50-8542

Contents

Main Installation, Start-Up, and Service Instructions CONTENTS SAFETY CONSIDERATIONS AQUAZONE 50HQP072-120 Horizontal Water Source Heat Pumps with PURON Refrigerant (R-410A) 50 Hz GENERAL INSTALLATION Step 1 Check Jobsite Step 2 Chec k Unit Page a50-8531 Fig. 1 Unit Dimensions Step 3 Locate Unit Step 4 Mount Unit Step 5 Install Duct System Step 6 Install Condensate Piping Drain Step 7 Field Con ver t Air Dischar ge Step 8 Install Piping Connections Step 9 Install Field Power Supply Wiring Page Table 2 Water Quality Guidelines Fig. 12 50HQP072-120 Units Typical Control Wiring with Complete C Control Page Fig. 14 Premierlink Controller Applications Wiring with Complete C Control LEGEND NOTE: Reversing valve is on in Cooling mode. Fig. 15 Premierlink Controller Applications Wiring with Deluxe D Control LEGEND NOTE: Reversing valve is on in Cooling mode. Table 3A Electrical Data 50HQP072-120 Standard Units POWER BLOCK Step 10 Install Field Control Wiring PRE-START-UP System Chec kout Airflow and External Static Pressure Table 5 Blower Data 50HQP072 a50-8544 Table 6 Blower Data 50HQP096 Table 7 Blower Data 50HQP120 FIELD SELECTABLE INPUTS Complete C Control Jumper Settings (See Fig. 12) Complete C Control DIP Switches Deluxe D Control Jumper Settings (See Fig. 13) Deluxe D Contr ol DIP Switches Deluxe D Control Accessory Relay Configura- tions START-UP Operating Limits Air Coil Cleaning Start Up System Scr oll Compressor Rotation Unit Start-Up in Heating Mode Flow Regulati on Flushing Antifreeze Cooling T o wer/Boiler Systems Ground Coupled, Closed Loop and Plateframe Heat Exchanger W ell Systems OPERATION P o wer Up Mode Units with Aquazone Complete C Control SYSTEM TEST Te s t M o d e Retry Mode Aquazone Deluxe D Control LED Indica- tors SERVICE Filter s W ater Coil Condensate Drain P ans Refrigerant System Condensate Drain Cleaning Compressor Fan M ot ors Belt Air Coil Checkin g System Char ge Blower F an P erformance Adjustment TROUBLESHOOTING Thermistor Contr ol Sensors Table 18 Troubleshooting Table 18 Troubleshooting (cont) Page Page Page HEATING CYCLE ANALYSIS COOLING CYCLE ANALYSIS *Use 500 for water, 485 for antifreeze. (kW)