Carrier PH14 B Series

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Installation Instructions

NOTE: Read the entire instruction manual before starting the installation.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or

use can cause explosion, fire, electrical shock, or other conditions which

may cause death, personal injury, or property damage. Consult a

qualified installer, service agency, or your distributor or branch for

information or assistance. The qualified installer or agency must use

factory–authorized kits or accessories when modifying this product.

Refer to the individual instructions packaged with the kits or accessories

when installing.

Follow all safety codes. Wear safety glasses, protective clothing, and

work gloves. Use quenching cloth for brazing operations. Have fire

extinguisher available. Read these instructions thoroughly and follow all

warnings or cautions included in literature and attached to the unit.

Consult local building codes and current editions of the National

Electrical Code (NEC) NFPA 70. In Canada, refer to current editions of

the Canadian electrical code CSA 22.1.

Recognize safety information. This is the safety–alert symbol . When

you see this symbol on the unit and in instructions or manuals, be alert to

the potential for personal injury.

Understand these signal words; DANGER, WARNING, and

CAUTION. These words are used with the safety–alert symbol.

DANGER identifies the most serious hazards which will result in severe

personal injury or death. WARNING signifies hazards which could

result in personal injury or death. CAUTION is used to identify unsafe

practices which may result in minor personal injury or product and

property damage. NOTE is used to highlight suggestions which will

result in enhanced installation, reliability, or operation.

INSTALLATION RECOMMENDATIONS

NOTE: In some cases noise in the living area has been traced to gas

pulsations from improper installation of equipment.

1. Locate unit away from windows, patios, decks, etc. where unit

operation sound may disturb customer.

2. Ensure that vapor and liquid tube diameters are appropriate for unit

capacity.

3. Run refrigerant tubes as directly as possible by avoiding

unnecessary turns and bends.

4. Leave some slack between structure and unit to absorb vibration.

5. When passing refrigerant tubes through the wall, seal opening with

RTV or other pliable silicon–based caulk (see Fig. 1).

6. Avoid direct tubing contact with water pipes, duct work, floor

joists, wall studs, floors, and walls.

7. Do not suspend refrigerant tubing from joists and studs with a rigid

wire or strap which comes in direct contact with tubing (see Fig. 1).

8. Ensure that tubing insulation is pliable and completely surrounds

vapor tube.

9. When necessary, use hanger straps which are 1 in. wide and

conform to shape of tubing insulation (see Fig. 1).

10. Isolate hanger straps from insulation by using metal sleeves bent to

conform to shape of insulation.

A07588

Fig. 1 – Connecting Tubing Installation

When outdoor unit is connected to factory–approved indoor unit,

outdoor unit contains system refrigerant charge for operation with AHRI

rated indoor unit when connected by 15 ft. (4.57 m) of field–supplied or

factory accessory tubing. For proper unit operation, check refrigerant

charge using charging information located on control box cover and/or

in the Check Charge section of this instruction.

IMPORTANT: Maximum liquid–line size is 3/8–in. OD for all

residential applications including long line.

IMPORTANT: Always install the factory–supplied liquid–line filter

drier. Obtain replacement filter driers from your distributor or branch.

PH14*B, PH15NB, PH16NC

SPLIT-SYSTEM HEAT PUMP

WITH R-410A REFRIGERANT

1-1/2 TO 5 TONS

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before installing, modifying, or servicing system, main electrical

disconnect switch must be in the OFF position.

There may be more than 1 disconnect switch. Lock out and tag switch

with a suitable warning label.

WARNING

EXPLOSION HAZARD

Failure to follow this warning could result in

death, serious personal injury, and/or property

damage.

Never use air or gases containing oxygen for

leak testing or operating refrigerant

compressors. Pressurized mixtures of air or

gases containing oxygen can lead to an

explosion.

INSULATION

SUCTION TUBE

LIQUID TUBE

OUTDOOR WALL INDOOR WALL

LIQUID TUBE

SUCTION TUBE

INSULATION

CAULK

HANGER STRAP

(AROUND SUCTION

TUBE ONLY)

JOIST

1” (25.4 mm)

MIN

THROUGH THE WALL

SUSPENSION

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This document outlines the installation and maintenance procedures for the PH14*B, PH15NB, and PH16NC series of split-system heat pumps, designed for residential and light commercial applications. These units are intended to be paired with approved AHRI-rated indoor units and are charged with refrigerant for operation with 15 ft (4.57 m) of field-supplied or factory-accessory tubing and a factory-supplied filter drier. Some indoor units may require additional subcooling for optimal heating performance.

Function Description

The PH14*B, PH15NB, and PH16NC units are split-system heat pumps that provide both cooling and heating functions. In cooling mode, the system removes heat from the indoor space and dissipates it outdoors. In heating mode, the system extracts heat from the outdoor air and transfers it indoors. The units utilize a reversing valve to switch between cooling and heating cycles.

Important Technical Specifications

Refrigerant Charge: The outdoor unit contains an approximate system refrigerant charge for operation with approved AHRI-rated indoor units when connected by 15 ft (4.57 m) of field-supplied or factory-accessory tubing and a factory-supplied filter drier.
Tubing Lengths: Refrigerant tubing lengths up to 36 in (914.4 mm) may be buried without further special consideration. Do not bury lines longer than 36 in (914.4 mm). For tubing line sets between 80 and 200 ft (24.38 and 60.96 m) and/or 20 ft (6.09 m) vertical differential, refer to the Residential Piping and Longline Guideline for accessory requirements.
Deep Vacuum Method: The system requires evacuation to 500 microns using a vacuum pump and gauge. A tight dry system will hold a vacuum of 1000 microns after approximately 7 minutes.
Electrical Requirements: Field wiring must comply with local and national fire, safety, and electrical codes. Voltage to the system must be within limits shown on the unit rating plate. A branch circuit disconnect of adequate size per NEC is required to handle the unit's starting current, located within sight and readily accessible from the unit.
Service Valve Torque: Service valve stem caps should be tightened to 1/12-turn past finger tight. Brass nut onto adapter tube and liquid service valve should be tightened finger tight, then wrench additional ½ turn only [15-ft lbs (20.3 N-m)]. Over-tightening may damage the plastic washer and service valve's piston body.
Minimum Circuit Ampacity (MCA) and Maximum Overcurrent Protection (MOP): Refer to the unit rating plate for specific values.
Transformer Power: The indoor unit requires a 24V, 40VA minimum transformer. If multiple accessories are used, the total transformer loading and transformer capacity must be split accordingly.

Usage Features

Cooling Operation: On a call for cooling, the thermostat energizes the reversing valve (switching to cooling), contactor (starting outdoor fan motor and compressor), and indoor blower relay (starting indoor blower motor on high speed).
Heating Operation: On a call for heating, the thermostat energizes the contactor (starting outdoor fan motor and compressor) and indoor blower relay (starting blower motor on high speed). If the temperature continues to fall, a second-stage room thermostat may activate supplemental electric heat.
Quiet Shift-2 (Aluminum Outdoor Coils): This field-selectable defrost mode (factory set to OFF) reduces noise during defrost and heating cycle restarts. When enabled, the compressor de-energizes for approximately 1 minute, then the reversing valve energizes, followed by compressor re-energization for the normal defrost cycle.
Defrost Control: A time/temperature control manages defrost cycles, with field-selectable time periods (30, 60, 90, or 120 minutes). The defrost thermostat senses coil temperature, and when it reaches approximately 32°F (0°C), it closes, initiating the defrost timing sequence. During defrost, the outdoor fan motor stops, and second-stage heat may be turned on.
Forced Defrost (Speedup): For Quiet Shift-2 models, shorting speedup pins (J1) with a flat-blade screwdriver for 5 seconds initiates a forced defrost. For other models, the defrost thermostat must be closed, and speedup terminals shorted.
Three-Phase Monitor Control: This control is not compatible with three-phase corner-grounded delta power supplies. If such a supply is present, the phase monitor must be bypassed.

Maintenance Features

Periodic Maintenance: For continuing high performance and to minimize possible equipment failure, periodic maintenance must be performed. The frequency of maintenance may vary depending on geographic areas, such as coastal applications. Refer to the User's Manual for detailed information.
Refrigerant Pressure Relief: Before system repair or final unit disposal, relieve pressure and recover all refrigerant. Use all service ports and open all flow-control devices, including solenoid valves.
Final Checks:
- Ensure all wiring is routed away from tubing and sheet metal edges to prevent rub-through or wire pinching.
- Ensure all wiring and tubing are secure in the unit before adding panels and covers.
- Tighten service valve stem caps to 1/12-turn past finger tight.
- Leave the Owner's Manual with the owner and explain system operation and periodic maintenance requirements.
- Fill out the Dealer Installation Checklist and place it in the customer file.
Filter Drier Installation: Installation of a filter drier in the liquid line is required.
Evacuation of Refrigerant Tubing and Indoor Coil: Refrigerant tubes and indoor coil should be evacuated using the deep vacuum method (500 microns) or the alternate triple evacuation method. Never use the system compressor as a vacuum pump.
Electrical Connections: Ensure ground wire is connected to the ground connection in the control box. Connect power wiring to the contactor. Do not supply power to the unit with the compressor terminal box cover removed.
Charge Verification: Factory charge amount and desired subcooling are shown on the unit rating plate. Additional subcooling may be required for optimal heating performance based on the installed indoor unit. Check refrigerant charge for maximum efficiency using the provided tables for required liquid line temperatures and superheat charging.
Heating Check Chart: To check system operation during the heating cycle, refer to the Heating Check Chart. This chart indicates whether a correct relationship exists between system operating pressure and air temperature entering indoor and outdoor units.