INSTALLATION INSTRUCTIONS3-phase R-410A Split System Heat Pump

ELECTRICAL WIRING

!

WARNING

 

Phase Monitor Relay Board

 

The Phase Monitor Board detects the sequence of the

 

 

 

ELECTRICAL SHOCK HAZARD

 

three phase electrical system, and a relay breaks the Y

 

(call for cooling) control signal if the phasing is incorrect.

 

 

 

Failure to follow this warning could result in per‐

 

Additionally, the board will detect the loss of voltage on

sonal injury or death.

 

any of the three phase inputs and break the Y signal in the

Before installing, modifying or servicing system,

 

same way.

 

 

An LED on the board displays the following status:

turn OFF the main (remote) electrical disconnect

 

device. There may be more than one disconnect

 

Red LED ON -

Normal function, relay contact

device.

 

 

 

closed.

 

 

 

Red LED Blinking - Abnormal function, relay contact

Refer to unit rating plate for the required supply voltage.

 

 

open.

Depending on the model, required supply voltage will be:

 

 

 

Red LED OFF -

No 24 VAC control power present at

 

208/230 V, 3-phase, 60 Hz.

 

 

 

 

board.

 

or

 

NOTE: Units with Comfort Alertt Diagnostics device

 

460 V, 3-phase, 60 Hz.

 

have phase monitor feature built in.

 

 

 

 

Outdoor

units are approved for use with copper

 

 

 

 

Figure 10

Phase Monitor Relay Board

conductors only. Do not use aluminum wire.

 

 

 

 

 

 

 

Refer to unit rating plate for minimum circuit ampacity and circuit protection requirements.

Grounding

Permanently ground unit in accordance with the National Electrical Code and local codes or ordinances. Use a copper conductor of the correct size from the grounding lug in control box to a grounded connection in the service panel or a properly driven and electrically grounded ground rod.

Supply Voltage Wiring Connections

Make all outdoor electrical supply (Line Voltage) connections with raintight conduit and fittings. Most codes require a disconnect switch outdoors within sight of the unit. Consult local codes for special requirements.

Route electrical supply (Line Voltage) wiring through knockout hole in bottom of Control Box.

Connect two power wires to Contactor and one power

Thermostat Wiring Connections

Route thermostat wiring through rubber grommet in

wire to Blue lead wire (use wire nut). Connect ground wire

to Ground Lug. Refer to Wiring Diagram on unit and

bottom of Control Box. Low voltage lead wires are

Figure 9.

 

provided in the control box for connection to thermostat

 

 

wires (use wire nuts). Refer to Wiring Diagram on unit and

 

208/230 V and 460 V

Figure 11 for low voltage wiring examples.

Figure 9

Electrical Supply

NOTE: Use No. 18 AWG (American Wire Gage)

 

(Line Voltage) Connections

 

color-coded, insulated (35 °C minimum) wire. If

 

 

DISCONNECT

 

thermostat is located more than 100 feet (30.5 m) from

 

unit as measured along the control voltage wires, use No.

PER NEC AND/OR

 

LOCAL CODES

CONTACTOR

16 AWG color-coded wires to avoid excessive voltage

 

drop.

 

11

 

 

 

L1

 

FIELD POWER

L3

 

 

 

WIRING

13

 

 

L2

 

 

BLUE LEAD WIRE

 

FIELD GROUND

 

 

WIRING

GROUND

 

 

 

 

LUG

 

506 01 5102 00

 

9

Page 9
Image 9
HP H4H3 manual Electrical Wiring

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