Bohn 4DA3R18ME Service Manual

CH-HADTB

March 2007

(Replaces CH-B-48D, 10/04)

Horizontal Air Discharge

Outdoor Discus®

Condensing Unit

Technical Guide

Model HDH, HDHS • 20-40 HP

Standard & Optional Features

HDH Outdoor Discus® Condensing Units, Horizontal Air
Discharge

Leak Resistant Design

The HDH Outdoor Discus® Condensing Unit features a
new leak resistant design which includes:

• The Floating Tube

™

condenser coil design. Refrigerant
carrying copper tubes do not contact any metal
support tubes. Instead, the coil is constructed with
expanded anchor tubes which support the coil
construction and do not carry refrigerant. The coil
design eliminates one of the major causes of leaks in
refrigeration systems

• Limited five-year warranty against condenser tube
sheet and center support leaks

• Designed for use with R-404A or R-507

• R-22 models available for all temperature applications

• Polyol Ester Oil charge on all units

• Pre-bent copper tubes minimize braze joints on
internal piping

• All sweat type connections, no flare joints to leak

• Fixed high pressure switch eliminates capillary
tube. Adjustable low pressure control comed with
braided hose

• Sentronic

™

electronic oil safety control

• Service Mate™ module to assist troubleshooting

Standard Features

• High efficiency Copeland Discus

®

compressors with

POE oil

• Spring mounted compressor with suction and
discharge vibration eliminators

• Crankcase heater sleeve isolates the heater from
direct contact with the oil

• Thermally protected permanently lubricated PSC
condenser fan motors (all units have several motors)

• Two valve adjustable head pressure control

• Separate subcooling circuit in condenser for added
capacity and vapor free liquid

• Receivers are sized for sufficient pumpdown capacity
with inlet and outlet service valves

• Pressure relief valve on receiver

• Sealed liquid line filter drier and sight glass

Service Mate™ diagnostic module on Beacon II™ units

•

• Electrical controls including compressor contactor
and optional defrost control are located in easily
accessible control box with a hinged cover

• Pumpdown switch

• Cabinet is constructed from pre-painted G90 steel

• Convenient access panels for easy servicing to
internal components

Expanded (Locked) Auxiliary Tubes: These

tubes support the coil with ns and refrigerant
carrying tubes. They do not carry refrigerant
and are tightly tted on end supports and center
supports.

Free-Floating Circuited Coil Tubes:

These tubes carry refrigerant and never
touch any sheet metal (end supports and
center supports).

Factory-Installed Optional Features

• Replaceable core liquid filter/drier

• Liquid line solenoid valve

• Sealed suction filter

• Replaceable core suction filter

• Suction accumulator

• Oil separator with discharge line check valve

• Air defrost timer

• Electric defrost kits, including timer, evaporative fan
contractor with fusing, defrost heater contactor(s),
lockout relay and terminal strip

• Fusing for heater loads

• Heated and insulated receiver with time delay relay

• Fused disconnect switch

• Condenser fan cycling

• Compressor unloading

• Demand cooling on low temperature R-22 models

• Coated condenser coils for protection against
corrosion in harsh environments

• Beacon II™ Control System

• Alternative compressors (contact factory)

© 2007, Heatcraft Refrigeration Products LLC

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HD - Chandler Discus
Semi-Hermetic

Condensing Unit

H - Horizontal Air Discharge

Nominal Horsepower

2000 - 20 HP
2500 - 25 HP
2600 - 25 HP
2700 - 27 HP
3000 - 30 HP
3100 - 30 HP
3500 - 35 HP
4000 - 40 HP

®

Nomenclature/Beacon II

Nomenclature

H D H 0500 D 7 3

Electrical Characteristics

3 - 208-230/3/60 4 - 460/3/60
8 - 230/3/60

Refrigerant
6 - R-22, R-404A or R-507

Application Range

L - Low (0° F to -40° F Suction)
D - High - R-22 (10° F to 40° F suction) or
Medium R-404A or R-507 (-10° F to 30° F suction)

™

Now available with Beacon II

™

Beacon II™ is the next generation of Chandler’s patented, preassembled, factory installed refrigeration system
featuring an integrated microcomputer-based electronic control board. The Beacon II™ system comes completely
factory installed, wired and tested saving you time and money.

Beacon II™ offers:

• Complete factory installation, wiring and testing which saves time and money

• Simple field electrical connections and 24 volt wiring between condensing and evaporator units

• Preset factory superheat allowing the system to run more efficiently and reducing future adjustments

• Monitors and controls box temperature, evaporator superheat, condenser fan cycling, system status and defrost
from outside the box

• Monitor and make system changes remotely via modem and exclusive Beacon II™ Smart II software

• Data logging capabilities with Smart Controller

Beacon II™ Smart Controller

The Beacon II™ Smart Controller is an optional system monitoring and programming control device. It allows
for adjustments to be made at the push of a button from a conveniently mounted location. The Beacon
II™ Smart Controller also allows you to monitor and make changes to the refrigeration system via modem
connection from anywhere in the world. The Beacon II™ has been updated to allow the user to make even more
precise adjustments than the first phase of the Beacon II™ Smart Controller. One Smart Controller can program
and control up to four separate condensing units with up to four evaporators on each system. That’s more
control in your hands!

™

Beacon II

Smart II Software

Beacon II™ Smart II Software makes it easy to adjust and monitor one or more refrigeration systems as well
as capture minute by minute system conditions. This Windows-based software allows you to connect to the
Beacon II™ Smart Controller from anywhere in the world to monitor the systems, make adjustments and log
minute by minute system conditions. This data logging capability is critical in the food service industry.

™

Beacon II

Smart Defrost

Beacon II™ Smart Defrost, available only on the Beacon II™ Smart Controller, enables the Beacon II™ system to
sense frost accumulation and initiate defrost only when it is necessary. Using the Beacon II™ Smart Controller,
you preset defrost times. At each scheduled defrost time, Smart Defrost checks system performance to see if a
defrost is necessary. If not, it simply does not defrost, waiting until the next scheduled defrost time.

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