MrCool PRODIRECT Series - User Manual

PRODIRECT™ SERIES
Split System Heat Pump & Air Conditioner
13 -14 SEER 1.5-5 Tons Model
HHP140* & HAC140*
Owner & Installation
Manual
Copyright © 2021 MRCOOL, LLC
Thank you for choosing MRCOOL. Please read this manual carefully before installation and keep it for future reference.
Due to updates and constantly improving performance, the information and instructions within this
manual are subject to change without notice. Please visit www.mrcool.com/documentation to
ensure you have the latest version of this manual.
Version Date: 6-25-21

Summary

Safety Information

Important Safety Information

Highlights the importance of safety symbols and warnings for proper unit operation and user safety.

Unit Dimensions and Specifications

Unit Dimensions and Refrigerant Connections

Details unit dimensions (H, W, L) and refrigerant connection valve sizes for different models.

Service Space Requirements

Required Service Clearances

Specifies minimum clearances for air inlet, outlet, and service access around the outdoor unit.

Refrigerant Piping Diagrams

Refrigerant Piping Configurations

Illustrates piping diagrams for cooling-only and cooling & heating systems across different models.

Electrical Circuit Diagrams

Electrical Circuit Diagrams

Provides circuit diagrams for cooling-only and cooling & heating configurations, including wire color codes.

Electrical Characteristics

Power Supply Specifications

Details electrical characteristics like frequency, phase, and voltage range for various unit models.

Operation Limits

Operating Temperature Ranges

Defines acceptable room and outdoor temperature limits for cooling and heating operations.

Installation Procedure

Overall Installation Steps

A flowchart detailing the sequence of installation tasks from location selection to test operation.

Location Selection

Indoor Unit Location Guidelines

Provides criteria for selecting an optimal location for the indoor unit.

Outdoor Unit Location Guidelines

Outlines considerations for choosing a suitable location for the outdoor unit.

Outdoor Unit Installation

Outdoor Unit Placement and Clearances

Details location selection, service space requirements, and installation guidelines for the outdoor unit.

Refrigerant Pipe Installation

Pipe Sizing and Length Limits

Specifies maximum pipe lengths, height drops, and sizing guidelines based on model capacity.

Pipe Connection Procedure

Details the steps for cutting, insulating, and connecting refrigerant pipes, including brazing precautions.

Vacuum Drying and Leakage Checking

Purpose and Method of Vacuum Drying

Explains the importance of vacuum drying and outlines procedures for ordinary and special methods.

Vacuum Pump Selection Criteria

Specifies the required vacuuming capability and precision for the vacuum pump.

Refrigerant Charging

Calculating Additional Refrigerant Charge

Provides formulas to calculate the additional refrigerant charge based on liquid pipe diameter and length.

Refrigerant Charging Safety and Verification

Emphasizes safety precautions during charging and methods for verifying the correct refrigerant charge.

Pipe Insulation

Refrigerant Pipe Insulation

Covers insulation procedures, material selection, and purpose for refrigerant pipes.

Drainage Pipe Insulation

Details insulation requirements for drainage pipes to prevent condensation and leakage.

Electrical Wiring Installation and Requirements

Wiring Installation Guidelines

Outlines key electrical wiring practices, grounding, and protection requirements.

Wire Gauge Selection

Provides tables for selecting appropriate wire gauges for power and signal lines based on unit model.

Test Operation

Pre-Operation Checks

Lists essential checks to perform before initiating the test operation of the unit.

Testing Indoor and Outdoor Unit Functions

Specifies points to check for both indoor and outdoor units during cooling mode test operation.

Troubleshooting

System Status and Alarm Indicators

Explains system status indicators, alarm codes, and fault descriptions for normal operation and system lock.

Troubleshooting Specific Faults

Provides diagnostic flowcharts for sensor faults, pressure alarms, and temperature protection issues.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The MRCOOL PRODIRECT™ Series is a line of split-system heat pumps and air conditioners designed for residential and light commercial applications. These units are available in 1.5 to 5-ton capacities and boast a 13-14 SEER rating, indicating their energy efficiency. The series includes both heat pump models (HHP140*) and air conditioner models (HAC140*). The manual emphasizes that these instructions are intended for qualified and licensed service personnel to ensure proper installation, adjustment, and operation, warning that failure to follow them could lead to fire, electrical shock, property damage, personal injury, or death. The units are AHRI Certified® for Unitary Small AC and Unitary Small HP, ensuring they meet industry performance standards when the complete system is listed with AHRI.

Function Description:

The MRCOOL PRODIRECT™ Series units are designed to provide indoor climate control, offering both cooling and, for heat pump models, heating functionalities. They operate as split systems, meaning they consist of an outdoor unit (condenser/compressor) and an indoor unit (evaporator/air handler) connected by refrigerant piping and electrical wiring. The system circulates refrigerant to absorb heat from one area and release it into another, effectively cooling or heating the indoor space. The heat pump models can reverse this cycle to provide heating during colder months.

Important Technical Specifications:

• Models: HHP140* (Heat Pump) & HAC140* (Air Conditioner)
• SEER Rating: 13-14 SEER
• Capacity: 1.5-5 Tons (18K to 60K BTU/h)
• Dimensions (Outdoor Unit):
  • 18K, 24K, 30K models: 25" H x 21-3/4" W x 21-3/4" L (633mm H x 554mm W x 554mm L)
  • 36K, 42K, 48K, 60K models: 25" H x 29-1/7" W x 29-1/7" L (633mm H x 740mm W x 740mm L) for 36K; 32-7/8" H x 29-1/7" W x 29-1/7" L (835mm H x 740mm W x 740mm L) for 42K, 48K, 60K.
• Refrigerant Connection Service Valve Size:
  • Liquid Line: 3/8" for all models.
  • Vapor Line: 3/4" for 18K-42K models; 7/8" for 48K-60K models.
• Power Supply: 220-230V, 1 Phase, 60Hz. Minimum voltage 198V, Maximum voltage 242V.
• Refrigerant Pipe Maximum Length & Elevation:
  • <36,000 Btu/h: Max. Length 50 ft (15m), Max. Elevation 26 ft (8m), Max. Elbows 5.

  • 36,000 Btu/h: Max. Length 66 ft (20m), Max. Elevation 33 ft (10m), Max. Elbows 5.

• Additional Refrigerant Charge (per foot of liquid pipe):
  • 1/4" (6.35mm) liquid pipe: 0.22 oz/ft (V=0.22 oz x (L-16))
  • 3/8" (9.52mm) liquid pipe: 0.43 oz/ft (V=0.43 oz x (L-16))
  • 1/2" (12.7mm) liquid pipe: 0.64 oz/ft (V=0.64 oz x (L-16))
• Electrical Wiring Gauge (AWG):
  • Indoor Unit Power Line: 16 AWG (3 wires) for all models.
  • Outdoor Unit Power Line: 14 AWG (3 wires) for 18K-24K; 12 AWG (3 wires) for 30K-36K; 10 AWG (3 wires) for 42K-60K.
  • Outdoor-Indoor Signal Line: 18 AWG (2 wires) for all models.
  • Thermostat Signal Line: 18 AWG (4 wires) for cooling-only models; 18 AWG (6 wires) for cooling & heating models.
• Operation Limits:
  • Room Temperature: 63°F~86°F (17°C~30°C) for both cooling and heating.
  • Outdoor Temperature: 64°F~109°F (18°C~43°C) for cooling; 19°F~75°F (-7°C~24°C) for heating.

Usage Features:

• Installation Flexibility: The manual provides detailed guidelines for selecting optimal indoor and outdoor unit locations, considering factors like support, accessibility, air circulation, drainage, and proximity to heat sources or corrosive materials.
• Quiet Operation: Recommendations are given to avoid placing the outdoor unit directly under windows of sensitive rooms (bedrooms, study) to minimize undesirable sound levels.
• Robust Design: The units are designed to withstand various environmental conditions, with considerations for snow accumulation and protection from direct sunlight/rain.
• Safety Features: Includes high and low pressure switches, discharge temperature sensors, and high temperature protection for the condenser and exhaust. A booster may be recommended for 18K-36K units in high ambient temperatures to aid compressor restart.
• Diagnostic Capabilities: The system provides error codes via indicator lights (green and yellow) to help diagnose issues such as temperature sensor faults, low/high pressure alarms, and high temperature protection events.

Maintenance Features:

• Service Access: The outdoor unit requires a minimum of 24" clearance for service access, 18" for air inlets (louvered panels), and 60" for air discharge.
• Vacuum Drying and Leakage Checking: Detailed procedures are provided for vacuum drying the system to eliminate moisture and non-condensable gases, which can cause abnormal operation or damage. A micron gauge is recommended to ensure vacuum levels under 800 microns, pulling down to 500 microns. Leakage tests are crucial after vacuuming.
• Refrigerant Charging: Instructions for additional refrigerant charging based on liquid pipe diameter and length are included. Emphasis is placed on using an electronic scale or fluid infusion apparatus for accurate charging and avoiding over-charging.
• Pipe Insulation: Comprehensive guidance on insulating both refrigerant and drainage pipes is provided to prevent condensation, improve performance, and ensure safety. Insulation material must withstand temperatures above 248°F (120°C) and have a thickness of at least 10mm.
• Electrical Wiring: Requirements for field wiring, grounding, and current leakage protection are outlined, emphasizing the need for a qualified electrician and proper wire sizing according to provided tables.
• Troubleshooting Guide: A table of display content (indicator light patterns) and corresponding state descriptions (e.g., sensor faults, pressure alarms) is included to assist in diagnosing common issues. Flowcharts are provided for detailed troubleshooting of T3 (condenser temperature) and T5 (discharge temperature) sensor faults, as well as low and high pressure alarms, and high temperature protection events. These flowcharts guide technicians through checking connections, sensors, PCBs, refrigerant levels, and heat exchanger conditions.
• Test Operation: A checklist for post-installation test operation covers indoor and outdoor unit functionalities, ensuring proper operation of controls, airflow, temperature adjustment, drainage, and checking for abnormal noise or vibration.

MrCool PRODIRECT Series Specifications