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Heatcraft BOHN MAC7X User Manual

Heatcraft BOHN MAC7X
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Installation and Operation Manual
MAC Series
Condensing Units
Replaces H-IM-67H (01/18)
TABLE of CONTENTS
General safety and inspection
Condensing unit specications ............................... 2
Evaporator unit specications ................................. 3
Evaporator placement ............................................. 4
Condensing Unit placement.....................................5
Refrigerant piping and line sizes ..........................6-8
Leak detection and evacuation ................................ 9
Field wiring ........................................................... 10
Beacon II Controller
Installation .......................................................... 11
Refrigerant line brazing
Power supply
Wiring ................................................................ 12
Box temp control settings
Refrigerant charging
Start-up operation ............................................... 13
Initial power on
Operating mode display ..................................... 14
Program & review settings/changes ..............15-18
Low ambient operation
Pumpdown ....................................................19-20
Defrost ................................................................ 20
Alarms and error indicator LED ........................ 21
Evaporator fans shut down by operators
Power failure
Space sensor terminal
Checking sensors ............................................... 22
System defaults
Control sensor and piping .................................. 23
Checking operation of exp. valve
Exp. valve motor winding resistance ................. 24
Smart Controller ............................................25-36
Operational checkout ......................................... 37
Preventive maintenance ................................38-40
Diagnostics .......................................................41-44
Beacon II parts lists ..........................................45-46
Startup Checklist .............................................. 47-48
Wiring diagrams ...............................................49-51
Warranty information ............................................ 52
H-IM-67H March 2018 Part #25006401
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Heatcraft BOHN MAC7X Specifications

General IconGeneral
BrandHeatcraft
ModelBOHN MAC7X
CategoryHeat Pump
LanguageEnglish

Summary

Condensing Unit Specifications

Evaporator Unit Specifications

Evaporator Placement

Evaporator Minimum Unit Clearance

Defines minimum clearance requirements for evaporator units.

Condensing Unit Placement

Space and Location Requirements

Key considerations for locating condensing units, including airflow and noise.

Leak Detection And Evacuation

Leak Detection

Procedures for leak testing the system using various methods.

Evacuation

Steps for evacuating the system to achieve a deep vacuum.

Field Wiring

Beacon II Controller

Installation Tips

Key installation considerations and tips for the Beacon II controller.

Refrigerant Line Brazing (CAUTION)

Precautions and methods for brazing refrigerant lines at the evaporator.

Box Temperature Control Settings

How to adjust and understand box temperature setpoints and differentials.

Initial Power On

System behavior and LED display during initial power application.

Programming And Reviewing Settings/Changes

How to program, review, and change system settings using buttons.

Programming And Reviewing Settings/Changes (continued)

Using the CLEAR/TEST button and understanding LED display codes.

Status Indicator LED (continued)

Detailed list of error codes and their meanings.

Service Mode

How to place the system into service mode and its effects.

Alarms

Description of alarm contacts, conditions, and alarm codes.

System Defaults

Default settings for R-404A and R-448A refrigerants for various parameters.

Checking Operation Of Expansion Valve (EEV)

Methods to check the operation and diagnose a faulty expansion valve.

Refrigerant Charging

Procedure for charging the system with refrigerant using the sight glass.

STATUS INDICATOR LED

Explanation of the LED display codes for status, alarms, and errors.

Pumpdown

Explanation of the pumpdown cycle and manual pumpdown procedures.

Defrost

Information on defrost timing, delay start, and modes.

Error Indicator LED

Explanation of error codes E1-E9 and system behavior for faults.

Expansion Valve Motor Winding Resistance

Procedure for measuring expansion valve motor winding resistance.

Wiring

Guidelines for high and low voltage wiring between units.

Start-Up Operation

Checks and settings required before initial start-up.

Checking Sensors

Procedure for checking sensor readings and resistance.

Beacon II Smart Controller

Beacon II Smart Controller Features

Wiring

For single Refrigeration system:

Wiring instructions for connecting a single Smart Controller to an Evaporator.

For MULTIPLE independent Refrigeration systems:

Wiring instructions for multiple systems with Smart Controllers.

Power Supply

Information on the Smart Controller's power supply and behavior during interruptions.

Initialization of Beacon II Smart Controller

INITIALIZATION STEPS

Step-by-step guide for initializing the Beacon II Smart Controller.

Programming Smart Controller

DEFTYP - ELE or AIR

Select defrost type (Electric or Air) and its impact on defaults.

REFTYP - Selection for type of refrigerant

Setting the refrigerant type for the system.

BOXTMP - Box Temp

Setting the desired box temperature range.

SMT DFT - Smart Defrost

Enabling/disabling Smart Defrost and its automatic programming.

Monitoring Smart Controller

SUPRHT - Superheat

Monitoring system superheat and checking other evaporators.

Smart Defrost

Operational Checkout

Preventive Maintenance

CONDENSING UNIT

UNIT COOLERS

Diagnostics

Startup Checklist

Wiring Diagrams

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