York YHE Series - User Manual

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Johnson Controls Unitary Products 5121495-UIM-E-0716

R-410A OUTDOOR SPLIT-SYSTEM

HEAT PUMP

MODELS: 14 SEER -

YHE, TH4, THE, RHP14L SERIES

1.5 TO 5 TONS – 1 & 3 PHASE

INSTALLATION MANUAL

LIST OF SECTIONS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

INDOOR EXPANSION DEVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

EVACUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

SYSTEM START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

INSTRUCTING THE OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

START UP SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

LIST OF FIGURES

Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Installation of Vapor Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Underground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Heat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

TXV Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

TXV Bulb and Equalizer Line Installations . . . . . . . . . . . . . . . . . . . . . .6

Proper Bulb Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Outdoor Unit Swing Away Control Box . . . . . . . . . . . . . . . . . . . . . . .13

Outdoor Unit Control Box (208/230V Single Phase) . . . . . . . . . . . . .13

Outdoor Unit Control Box (208/230V & 460V 3-Phase) . . . . . . . . . . 13

Typical Field Wiring (Air Handler / Electrical Heat)

(Single and Three-Phase) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Heat Pump Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Demand Defrost Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Defrost Operation Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Wiring Diagram - Single Phase - 208/230V (Demand Defrost) . . . . 19

Wiring Diagram - Three Phase - 208/230V (Demand Defrost) . . . . . 20

Wiring Diagram - Three Phase - 460V (Demand Defrost) . . . . . . . . 21

LIST OF TABLES

Maximum / Minimum Operating Limit Conditions 2

R-410A Saturation Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

YHE18 Heat Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

YHE24 Heat Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

YHE30 Heat Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

YHE35 Heat Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

YHE36 Heat Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

YHE42 Heat Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

YHE48 Heat Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

YHE60 Heat Charging Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

TEST Input Functionality with Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

TEST Input Functionality without Y . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Status Code Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

SECTION I: GENERAL

The outdoor units are designed to be connected to a matching indoor

coil with sweat connect lines. Sweat connect units are factory charged

with refrigerant for a nominal sized matching indoor coil plus 15 feet of

field-supplied lines.

Matching indoor coils can be used with a thermostatic expansion valve

(TXV). Refer to the Tabular Data Sheet or to the Technical Guide for

the proper selection.

SECTION II: SAFETY

This is a safety alert symbol. When you see this symbol on

labels or in manuals, be alert to the potential for personal

injury.

Understand and pay particular attention to the signal words DANGER,

WARNING, or CAUTION.

DANGER indicates an imminently hazardous situation, which, if not

avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation, which, if not

avoided, could result in death or serious injury.

CAUTION indicates a potentially hazardous situation, which, if not

avoided may result in minor or moderate injury. It is also used to

alert against unsafe practices and hazards involving only property dam-

age.

WARNING

Improper installation may create a condition where the operation of

the product could cause personal injury or property damage.

Improper installation, adjustment, alteration, service or mainte-

nance can cause injury or property damage. Refer to this manual

for assistance or for additional information, consult a qualified con-

tractor, installer or service agency.

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Summary

SAFETY

Safety Signal Words and Definitions

Explains DANGER, WARNING, and CAUTION signal words for safety.

UNIT INSTALLATION

LOCATION

Selecting and verifying a suitable installation location for the unit.

ADD-ON REPLACEMENT;RETROFIT

Steps for replacing an R-22 unit with an R-410A unit.

GROUND INSTALLATION

Installing the unit on a solid, level base at ground level.

ROOF INSTALLATION

Installing the unit on a roof, ensuring structural support.

WALL MOUNT INSTALLATION

Mounting the unit on a wall using a solid base.

UNIT PLACEMENT

Positioning the unit on its base and ensuring proper clearances.

LIQUID LINE FILTER-DRIER

Information on the liquid line filter-drier and replacement guidelines.

PIPING CONNECTIONS

Guidelines for connecting refrigerant lines between units.

PRECAUTIONS DURING LINE INSTALLATION

Care needed to avoid kinking, bending, or damaging refrigerant lines.

PRECAUTIONS DURING BRAZING OF LINES

Best practices for brazing refrigerant line connections.

PRECAUTIONS DURING BRAZING SERVICE VALVE

Methods to protect service valves during brazing.

INDOOR EXPANSION DEVICE

THERMOSTATIC EXPANSION VALVE (TXV) INSTALLATION

Step-by-step guide for installing the TXV kit.

SYSTEM CHARGE

CHARGING THE UNIT

Procedures for charging the system with the correct refrigerant amount.

CHARGING WITH GAUGES

Using gauges to verify and adjust system charge.

ELECTRICAL CONNECTIONS

GENERAL INFORMATION & GROUNDING

Essential electrical connection and grounding requirements.

FIELD CONNECTIONS POWER WIRING

Instructions for connecting the main power supply to the unit.

FIELD CONNECTIONS CONTROL WIRING

Routing and connecting low voltage control wiring for operation.

DEHUMIDIFICATION CONTROL

Information on installing and using a dehumidification control.

INDOOR CFM SELECTION

Setting indoor fan speed for optimal airflow and comfort.

SYSTEM START-UP

ENERGIZE CRANKCASE HEATER

Procedure to ensure the crankcase heater is energized before startup.

SYSTEM OPERATION

ANTI SHORT-CYCLE DELAY

Timer preventing rapid compressor cycling for protection.

LOW VOLTAGE DETECTION

Control's protection against low voltage conditions.

TEST INPUT FUNCTIONALITY

Using test terminals for installation and service functions.

FAULT CODE DISPLAY

Displaying status and fault codes via the LED indicator.

DEMAND DEFROST OPERATION

How the system manages frost buildup and defrost cycles.

COOLING OPERATION

How the control manages the unit's cooling cycle.

HEATING OPERATION

How the control manages the unit's heating cycle.

EMERGENCY HEAT

Control logic for emergency heat activation.

PRESSURE SWITCH FAULT & LOCKOUT

Handling of pressure switch faults and unit lockout.

INSTRUCTING THE OWNER

MAINTENANCE

Recommended maintenance tasks for unit longevity and performance.

Summary

SAFETY

Safety Signal Words and Definitions

Explains DANGER, WARNING, and CAUTION signal words for safety.

UNIT INSTALLATION

LOCATION

Selecting and verifying a suitable installation location for the unit.

ADD-ON REPLACEMENT;RETROFIT

Steps for replacing an R-22 unit with an R-410A unit.

GROUND INSTALLATION

Installing the unit on a solid, level base at ground level.

ROOF INSTALLATION

Installing the unit on a roof, ensuring structural support.

WALL MOUNT INSTALLATION

Mounting the unit on a wall using a solid base.

UNIT PLACEMENT

Positioning the unit on its base and ensuring proper clearances.

LIQUID LINE FILTER-DRIER

Information on the liquid line filter-drier and replacement guidelines.

PIPING CONNECTIONS

Guidelines for connecting refrigerant lines between units.

PRECAUTIONS DURING LINE INSTALLATION

Care needed to avoid kinking, bending, or damaging refrigerant lines.

PRECAUTIONS DURING BRAZING OF LINES

Best practices for brazing refrigerant line connections.

PRECAUTIONS DURING BRAZING SERVICE VALVE

Methods to protect service valves during brazing.

INDOOR EXPANSION DEVICE

THERMOSTATIC EXPANSION VALVE (TXV) INSTALLATION

Step-by-step guide for installing the TXV kit.

SYSTEM CHARGE

CHARGING THE UNIT

Procedures for charging the system with the correct refrigerant amount.

CHARGING WITH GAUGES

Using gauges to verify and adjust system charge.

ELECTRICAL CONNECTIONS

GENERAL INFORMATION & GROUNDING

Essential electrical connection and grounding requirements.

FIELD CONNECTIONS POWER WIRING

Instructions for connecting the main power supply to the unit.

FIELD CONNECTIONS CONTROL WIRING

Routing and connecting low voltage control wiring for operation.

DEHUMIDIFICATION CONTROL

Information on installing and using a dehumidification control.

INDOOR CFM SELECTION

Setting indoor fan speed for optimal airflow and comfort.

SYSTEM START-UP

ENERGIZE CRANKCASE HEATER

Procedure to ensure the crankcase heater is energized before startup.

SYSTEM OPERATION

ANTI SHORT-CYCLE DELAY

Timer preventing rapid compressor cycling for protection.

LOW VOLTAGE DETECTION

Control's protection against low voltage conditions.

TEST INPUT FUNCTIONALITY

Using test terminals for installation and service functions.

FAULT CODE DISPLAY

Displaying status and fault codes via the LED indicator.

DEMAND DEFROST OPERATION

How the system manages frost buildup and defrost cycles.

COOLING OPERATION

How the control manages the unit's cooling cycle.

HEATING OPERATION

How the control manages the unit's heating cycle.

EMERGENCY HEAT

Control logic for emergency heat activation.

PRESSURE SWITCH FAULT & LOCKOUT

Handling of pressure switch faults and unit lockout.

INSTRUCTING THE OWNER

MAINTENANCE

Recommended maintenance tasks for unit longevity and performance.

This document describes the installation and operation of R-410A Outdoor Split-System Heat Pumps, specifically the 14 SEER YHE, TH4, THE, and RHP14L series, ranging from 1.5 to 5 tons, and available in 1 & 3 phase configurations. The manual emphasizes safety, proper installation, and maintenance procedures to ensure optimal performance and longevity of the unit.

Function Description:

The R-410A Outdoor Split-System Heat Pump is designed to provide both cooling and heating for residential or commercial spaces. It connects to a matching indoor coil with sweat connect lines and uses R-410A refrigerant. The unit's operation involves a compressor, outdoor fan, and a reversing valve to switch between cooling and heating modes. A demand defrost control module manages frost and ice accumulation on the outdoor coil during heating operation, ensuring efficient airflow. The system is designed to work with a thermostatic expansion valve (TXV) for refrigerant metering.

Important Technical Specifications:

Refrigerant: R-410A. It operates at higher pressures than R-22 systems, requiring specialized service equipment rated for R-410A.
SEER Rating: 14 SEER.
Capacity: 1.5 to 5 tons.
Phase: Available in 1 & 3 phase configurations.
Factory Charge: Units are factory charged with refrigerant for a nominal sized matching indoor coil plus 15 feet of field-supplied lines.
Maximum Allowable Line Length: 80 feet. For longer lengths, consult the Piping Application Guide (P/N 247077).
Minimum/Maximum Operating Temperatures:
- Cooling: Outdoor coil 50°F (min) to 125°F (max) DB, Indoor coil 57°F (min) to 75°F (max) WB.
- Heating: Outdoor coil -10°F (min) to 80°F (max) DB, Indoor coil 50°F (min) to 80°F (max) DB.
Electrical: 208/230 VAC 60 Hz 1 Phase, 208-230 VAC 60 Hz 3 Phase, and 460 VAC 60 Hz 3 Phase models are covered, with specific wiring diagrams provided. All field wiring must use copper conductors only and conform to local/national codes.
Anti Short-Cycle Delay (ASCD): A five-minute timer prevents compressor short-cycling after power or thermostat signal interruption.
Low Voltage Protection: The control monitors 24 VAC voltage, preventing contactor chatter and de-energizing relays if voltage drops below specific thresholds (19 VAC and 16 VAC).
Defrost Control: Regulated based on accumulated compressor run time, outdoor coil temperature, and outdoor ambient temperature. Defrost terminates when liquid line temperature reaches a set point or after 12 minutes of operation.

Usage Features:

Installation Flexibility: Can be installed at ground level on a solid base or on a roof, with structural support and vibration isolation. Wall-mounted brackets are also an option for specific site conditions.
Serviceability: The control box is designed to swing open for easy access to refrigeration components.
Dehumidification Control (Typical): Compatible with a dehumidification control accessory (2HU16700124) for variable speed air handlers/furnaces in high humidity areas. This allows for cooling at reduced airflow, lowering evaporator temperature, and increasing latent capacity.
Indoor Airflow Measurement: Emphasizes measuring actual airflow with a manometer rather than assuming 0.5" water column total external static pressure. Recommended airflow is between 35°-45° CFM per ton of cooling.
Test Input Connector: Allows for various testing functions during installation and service, including bypassing ASCD, clearing pressure switch lockout, and initiating defrost cycles.
Fault Code Display: The control provides status codes via an LED to indicate operational state and fault conditions, aiding in troubleshooting.

Maintenance Features:

Coil Cleaning: Outdoor coils should be cleaned regularly with a brush, vacuum, or suitable means. If deep cleaning is needed, Calgon Coilclean (1 part Coilclean to 7 parts water) is recommended, followed by rinsing with clean water.
Fan Motor Lubrication: Outdoor fan motor bearings are permanently lubricated and do not require periodic oiling.
Indoor Coil and Drain Pan: Should be inspected and cleaned regularly to prevent odors and assure proper drainage.
Filter Replacement: Owners are instructed on the importance of regular filter replacement and equipment maintenance.
Crankcase Heater: The compressor is equipped with a crankcase heater to prevent refrigerant migration during the OFF cycle. If the main switch is disconnected for long periods, the unit should not be started until 8 hours after reconnection to allow the crankcase heater to warm the compressor.