Heatcraft PRO3 PTN128H2B User Manual

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Refrigeration

System Installation

Refrigeration System

For Indoor Applications

Installation and

Operation Guide

Table of Contents

1. Ownerʼs Installation Instructions

Performance/Electrical Data

Speciﬁcations ............................................................

2

Dimensional Diagrams ..............................................3

Space and Location Requirements

Recommended Unit Placement ................................. 4

Rigging

Mounting .................................................................... 5

Inspection

General Safety Information

Standard Installation Procedure ................................ 6

2. Freezers

Service Information

Maintenance

Sequence of Operation

Freezer System Pre-Setpoints

Electric Defrost Sequence of Operation

Programming Electric Defrost Controls ................7-10

Freezer Defrost Control

Medium and Large Cabinet ....................................... 7

Freezer Defrost Control

Small Cabinet .......................................................... 10

3. Coolers

Defrost Controls

Sequence of Operation

Maintenance ............................................................ 11

4. Service Information

System Troubleshooting Chart ................................ 12

Replacement Parts ..................................................13

5. Wiring Information

Electrical Wiring Diagrams .................................14-19

6. Warranty Information

...................................... 20

Replaces H-IM-81 (1/04)

H-IM-81A October 2004 Part No. 25001801

Table of Contents

Questions and Answers:

G
George MooreAug 16, 2025
Why is my Heatcraft Air Conditioner compressor not running?
- B
  bhahnAug 16, 2025
  Several factors can cause a Heatcraft Air Conditioner compressor not to run. It could be due to an open main switch (close the switch), a blown fuse (check for shorts or grounds, investigate overloading, and replace the fuse after correction), tripped thermal overloads (which reset automatically, so monitor the unit when it restarts), a defective contactor or coil (repair or replace it), or the system being shut down by safety devices (determine the cause and correct it before resetting the safety switch). Other potential causes include no cooling being required (wait until cooling is needed), motor electrical issues (check for open windings, short circuits, or burnout), or loose wiring (check and tighten all wire junctions and terminal screws).
M
Michael MyersAug 19, 2025
What to do if Heatcraft Air Conditioner has high discharge pressure?
- J
  Jesse LongSep 12, 2025
  If your Heatcraft Air Conditioner has high discharge pressure, it could be due to several reasons. There might be non-condensables in the system (remove them), the fan might not be running (check the electrical circuit and replace the motor if it's defective), the condenser coil could be dirty (clean it), or the system might be overcharged with refrigerant (reclaim refrigerant and recharge the proper amount).
A
Angela MitchellAug 22, 2025
What causes a Heatcraft Air Conditioner fan not to operate?
- S
  Sarah GoodwinAug 22, 2025
  A Heatcraft Air Conditioner fan might not operate due to an open main switch (close the switch), blown fuses (replace fuses and check for short circuits or overload conditions), a defective motor (replace the motor), a defective defrost control (replace the component), the unit being in a defrost cycle (wait for completion), or the coil not getting cold enough to reset the thermostat (adjust the fan delay setting of the control).
C
Colin WoodsAug 25, 2025
What to do if my Heatcraft Air Conditioner has low suction pressure?
- B
  Bobby McdowellAug 25, 2025
  If you are experiencing low suction pressure in your Heatcraft Air Conditioner, it could be due to a lack of refrigerant (check for leaks, repair, and add charge), a dirty or iced evaporator (clean it), a malfunctioning expansion valve (check and reset for proper superheat), or a condensing temperature that is too low (check ambient temperature, which should be between 50°F and 100°F).
J
jchungAug 27, 2025
Why is my Heatcraft Air Conditioner compressor noisy?
- N
  Nathan JeffersonAug 27, 2025
  A noisy or vibrating Heatcraft Air Conditioner compressor can be caused by flooding of refrigerant into the crankcase (check the setting of expansion valves) or a worn compressor (replace it).
B
Brenda CummingsAug 30, 2025
What causes ice accumulating on my Heatcraft Air Conditioner?
- C
  Christina MahoneyAug 30, 2025
  Ice accumulating on the ceiling around the evaporator and/or on the fan guards of your Heatcraft Air Conditioner can occur if the defrost duration is too long (adjust the defrost termination temperature on the control), the fan delay is not delaying fans after the defrost period (adjust the fan delay setting or replace a bad sensor), there is a defective defrost control or sensor (replace the defective component), or there are too many defrosts (adjust the number of defrosts).
G
Gabriel RamirezSep 2, 2025
What causes high suction pressure in Heatcraft Air Conditioner?
- T
  Tracey RomanSep 2, 2025
  High suction pressure in a Heatcraft Air Conditioner can be caused by an excessive load (reduce the load or add additional equipment) or an expansion valve overfeeding (check the remote bulb and regulate superheat).
M
murrayrobertSep 4, 2025
What causes a Heatcraft Air Conditioner compressor thermal protector switch to open?
- J
  Jennifer KnappSep 5, 2025
  The compressor thermal protector switch in your Heatcraft Air Conditioner might open due to operating beyond design conditions (add equipment to stay within allowable limits), a dirty condenser coil (clean the coil), or an overcharged system (reduce the charge).
D
Danielle TaylorSep 7, 2025
Why is the room temperature too high with my Heatcraft Air Conditioner?
- R
  Robert PerrySep 7, 2025
  If the room temperature is too high when using your Heatcraft Air Conditioner, it could be because the control cut out is set too high (adjust the control), the superheat is too high (adjust the thermal expansion valve), the system is low on refrigerant (add refrigerant), or the coil is iced-up (manually defrost the coil and check defrost controls for malfunction).
A
Angela BarnesSep 10, 2025
What causes coil not clearing of frost during defrost cycle in Heatcraft Air Conditioner?
- K
  Kenneth WestSep 10, 2025
  A coil not clearing of frost during the defrost cycle in your Heatcraft Air Conditioner may be due to the coil temperature not getting above the freezing point during defrost (check heater operation), not enough defrost cycles per day (adjust the control for more cycles), a defrost cycle that is too short (adjust the defrost control duration setting), a defective defrost control or sensor (replace the component), a defective heater (replace the heater), improper unit installation (check and adjust if necessary), or a plugged drain line (clean the drain line).

Heatcraft PRO3 PTN128H2B Specifications

General

Brand	Heatcraft
Model	PRO3 PTN128H2B
Category	Air Conditioner
Language	English

Summary

Owner's Installation Instructions

Performance and Electrical Data

Details unit specifications, voltage, and electrical data for coolers and freezers.

Space and Location Requirements

Inspection and Safety Information

Covers shipment checks, general safety precautions, and essential installation procedures.

Medium and Large Cabinet Freezer Operations

Electric Defrost Control and Programming

Details electronic defrost control, sequence, and programming for medium/large freezers.

Service Information

Troubleshooting Chart

Lists common problems, possible causes, and corrective steps for system issues.

Replacement Parts List

Catalog of part numbers and their applicability to different cooler and freezer models.

Wiring Information

Small Cabinet Cooler Wiring

Wiring diagrams for 115/1/60 models PTN024H2A, PTN029H2A, and PTN040H2A.

Small Cabinet Freezer Wiring

Medium/Large Cabinet Cooler Wiring

Medium/Large Cabinet Freezer Wiring

Large Cabinet Three-Phase Cooler Wiring

Large Cabinet Three-Phase Freezer Wiring

Warranty Information

Standard Warranty Statement

Details the two-year/thirty-month warranty for PRO³ products and installation conditions.

Optional Extended Compressor Warranty

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