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Parallel compressor systems introduction, Inspection, Unit designation – Heatcraft Refrigeration Products PARALLEL COMPRESSOR SYSTEMS 25000102 User Manual

Page 3: Model definition

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Parallel Compressor Systems Installation & Operations Manual, October 2004

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Parallel Compressor Systems

Introduction

Parallel Compressor systems are central refrigeration units

employing 2 to 8 parallel piped compressors, a control panel,

and receiver mounted on one common base frame. The system

may be designed for either Indoor or Outdoor use. The Outdoor

design may include the condenser mounted and piped.
The selection and design of the system is based on the needs

of the individual customer. The most important point in

planning an installation of the Heatcraft parallel system is the

proper selection of the system components for the particular

application.
Component parts have been selected for their dependability

and availability to keep service problems to a minimum.

Simplicity of design has also made the Heatcraft parallel

system one of the easiest to service and install. The simplicity

and compactness of the Heatcraft design make the addition of

hot gas defrost and/or heat reclaim a simple and economical

feature.
In the following pages will be found explanations of system

components, wiring and piping diagrams, control settings, and

operational guides.

Inspection

Unit inspection should be assigned to a dependable individual.

Inspect the parallel system and any accessories shipped with

them for damages or shortages before and during unloading.

All items on bill of lading should be accounted for prior to

signing the shipping receipt. Note any shortages or damage on

carrier’s delivery receipt (Specify the extent and type of damage

found). Unit should be inspected carefully for concealed

damage. Notify the Heatcraft sales representative and the

carrier of the damage immediately. Request an immediate

joint inspection with the carrier (Do not repair the unit until

inspected by carrier’s representative). Care should be exercised

when uncrating units to prevent damage.
The system is shipped with a holding charge of dry nitrogen.

Check to see that pressure is still in the unit upon receipt.

Report lack of pressure immediately to the Heatcraft service

department.

NOTE: Accessory items such as drier cores,

mounting pads, modems, etc. may be

packaged in a separate carton. Be sure

that you receive all items.

Unit Designation

Units are identified by letter, brand, compressor type, quantity

of compressors, horsepower, condenser type, control voltage,

defrost type, refrigerant/range, unit voltage and application.

Unless otherwise requested by the customer all refrigeration

circuits are numbered from one to the highest and from left to

right while facing the electrical panel.

Model Definition:

1st digit - Brand (B, C, H, or L)

2nd digit - Compressor Type

H - Hermetic

R - Reciprocating

S - Screw

O - Open

Z - Scroll

®

C - Compound

3rd digit - Unit Construction

R - Remote Condenser

U - Attached Condenser

H - Hybrid

M - Multi-compressor Platform

F - Frame Hybrid (Frame + Standard Unit)

4th digit - Compressor Quantity

2 - 2 Compressors

3 - 3 Compressors

4 - 4 Compressors

Etc.

5th, 6th, & 7th digit - Horsepower

030 - 30 HP

075 - 75 HP

100 - 100 HP

Etc.

8th digit - Condenser Type

A - Air

W - Water

E - Evaporative

9th digit - Control Voltage

A - 115/1/60

B - 208-230/1/60

C - 24/1/60

10th digit - Defrost Type

A - Air/Off-Cycle

E - Electric

G - Hot Gas

M - Multiple

W - Water

11th digit - Temperature Range

L - Low

M - Medium

H - High

C - Combination

X - Ultra Low

12th digit - Refrigerant Type

2 - R-22

4 - R-134A

6 - R-404A, R-507

8 - Multiple

13th digit - Unit Voltage

C - 208-230/3/60

D - 460/3/60

E - 575/3/60

J - 208/3/60

K - 230/3/60

M - 380/3/60

14th digit - Application

1 - Indoor

2 - Outdoor