Master-Bilt MAC-8 Operator’s Manual

MAC-7&8

Featuring Advanced Master Controller 2.0 Technology

Reverse Cycle Defrost

Installation & Operations Manual

02-14-145revision

©2015 Master-Bilt Products, an unincorporated division of Standex International Corporation.

All rights reserved.

TABLE OF CONTENTS

Page

Introduction .....................................................................................................3

Warning Labels and Safety Instructions+++++++++++++++..4

General Information ........................................................................................5

Condensing Unit Specifications...................................................................................... 5

Delivery Inspection ......................................................................................................... 5

Handling and Placement of Condensing Unit ...............................................6

Evaporator Coils..............................................................................................7

Ice Machine and Drink Machine Remote Circuits.........................................9

Electrical ..........................................................................................................9

Refrigerant Lines .............................................................................................9

Evaporator Suction Outlet Temperature Sensor Location ........................10

MAC-7 and MAC-8 Wiring Diagram with Reverse Cycle Defrost ..............11

Leak Check ....................................................................................................12

Evacuation, Dehydration and Start-Up ........................................................12

Charging Procedure ................................................................................................ 12-14

Evacuation Procedure .................................................................................................. 12

Drain Lines and heater .................................................................................15

Final Check List .............................................................................................16

Periodic Check of Entire System .................................................................17

Sale and Disposal .........................................................................................17

2

Introduction

Thank you for purchasing Master-Bilt refrigeration equipment. This manual contains important
instructions for installation. Read this manual carefully before installing or servicing your Master-Bilt
refrigeration equipment. Also, for complete technical information of our walk-in cooler and freezer
refrigeration systems, please consult

Operation Manual and the Master Controller 2.0 Installation & Operation Manual.

NOTICE

Installation and service of the refrigeration and electrical components must be performed by a
refrigeration mechanic or licensed electrician.

DANGER

Improper or faulty hook-up of electrical components of the refrigeration units can result in severe
injury or death.
All electrical wiring hook-ups must be done in accordance with all applicable local, regional or
national standards.

NOTICE

Read this manual before installing your refrigeration. Keep the manual and refer to it before doing
any service. Failure to do so could result in personal injury or equipment damage.

The portions of this manual covering refrigeration and electrical components contain technical instructions
intended only for persons qualified to perform refrigeration and electrical work.
This manual cannot cover every installation, use or service situation. If you need additional information,
contact us:

Master-Bilt Condensing Unit and Refrigeration System Installation &

Parts and Technical Service Department

Master-Bilt Products

908 Highway 15 North

New Albany, MS 38652

Phone [phone]

Fax [phone]

E-Mail: [e-mail]

3

Warning Labels and Safety Instructions

This symbol is the safety-alert symbol. When you see this symbol on your cabinet or
in this manual, be alert to the potential for personal injury or damage to your
equipment.

Be sure you understand all safety messages and always follow recommended precautions and safe
operating practices.

NOTICE TO EMPLOYERS

You must make sure that everyone who installs, uses or services your refrigeration equipment is
thoroughly familiar with all safety information and procedures.

Important safety information is presented in this section and throughout the manual. The following signal
words are used in the warnings and safety messages:

DANGER: Severe injury or death will occur if you ignore the message.

WARNING: Severe injury or death can occur if you ignore the message.

CAUTION: Minor injury or damage to your cabinet can occur if you ignore the message.

NOTICE: This is important installation, operation or service information. If you ignore the

message, you may damage your cabinet.

The warning and safety labels shown throughout this manual are placed on your Master-Bilt
Products refrigeration unit at the factory. Follow all warning label instructions. If any warning or
safety labels become lost or damaged, call Master-Bilt’s customer service department at (800) 684­8988 for replacements.

This label is located on the condensing unit.

4

General Information

Please read this manual prior to installing your Master-Bilt equipment. This information is based on good
refrigeration practice and should be used as a guide for installation and operations.

Delivery Inspection

Be sure to check for damage when this equipment is delivered by the carrier. Indicate damage on the
carrier’s Bill of Lading so that a claim may be filed.

Condensing Unit Specifications

Table 1. Specifications for system where evaporators use condensing unit power

Model

R62R11B4CS* MAC-7

R62R11B3CS* MAC-8

R62R11B5CS* MAC-8C

Sales

Nomanclature

Location Compressor

Cooler ZS11KAE-TF5 R404A 208-230/3 1 1/2

Freezer ZS30K4E-TF5 R404A 208-230/3 4

Cooler ZS11KAE-TF5 R404A 208-230/3 1 1/2

Freezer ZS38K4E-TF5 R404A 208-230/3 5

Cooler ZS11KAE-TF5 R404A 208-230/3 1 1/2

Freezer ZS45K4E-TF5 R404A 208-230/3 6

* NOTE: For coated condenser coil, this place is “C”

Important Notice: Do not use reverse cycle defrost when the ambient is lower than -20oF.

Refrig

.

Voltage HP

System

MCA

35 40

43 50

46 60

System

MOP

Table 1.1 Specifications for system where evaporators use separate power source

Model

R62R11B4CS MAC-7

R62R11B3CS MAC-8

R62R11B5CS MAC-8C Cooler ZS11KAE-TF5 R404A 208-230/3 1 1/2

Sales

Nomanclature

Location Compressor

Cooler ZS11KAE-TF5 R404A 208-230/3 1 1/2

Freezer ZS30K4E-TF5 R404A 208-230/3 4

Cooler ZS11KAE-TF5 R404A 208-230/3 1 1/2

Freezer ZS38K4E-TF5 R404A 208-230/3 5

Refrig

.

Voltage HP

System

MCA

32 40

39 50

42 50

System

MOP

Wt.

LBS

717

717

717

Wt.

LBS

717

717

717

5

Handling and Placement of Condensing Unit

To minimize damage to the unit housing, it is recommended that the crate not be removed until the unit is
moved to its final location.

The following should be considered when placing the unit:

A. The condenser coil (air inlet) should not be located so as to restrict air flow into the coil or direct

facing of sunlight. A minimum of 12” is required (18” is preferred) between the face of the coil and a
wall or other vertical obstruction.

B. Keep snow accumulation 18” to 30” away from condenser coils (air inlets) at all times.

C. A minimum of 30” is required on the three louvered sides to allow access for maintenance.

D. Do not position multiple units so that the air discharge of one is into the air intake condenser of

another.

E. The roof mounting curb for the MAC units should be designed in such a way as to fully support all

four of the bottom rails.

Holes are provided in the base supports for mounting bolts and for bridle lift rods.

6