Cold Shot Chillers ACWC-180-EM-DR-LT-0-5, Installation, Operation And Maintenance Instructions

SHEET #:

18

SHEET:

Option: Low Ambient Fan Speed Control

REF DATE:

February 2, 2016

DESCRIPTION

Options for Series A Control System

Standard setup and typical variations 

shown or noted.

FILE: 

DWG_Electrical-DeltaControl-SeriesA122_020216.vsd

GENERAL NOTES

1. Circuit breaker(s) may be used in place of fuse(s).

2. WARNING-For continued protection against fire hazard replace fuses with the same type and rating only.

3. Unit must be permanently grounded and conform to N.E.C. & local codes.

4. Use copper conductors for field-wiring.  Class 1, unless noted.  All wire based on 105°C insulation wire, minimum.

5. Wire colors shown may differ from actual unit.

6. Drawing line item reference identification:

- Number in parenthesis near output is location of controlled items.  First number is sheet #, second & third are line#.

- No underline indicates normally open (NO) contact,  Underline indicates normally closed (NC) contact.

7. All intellectual property, including designs and programming logic are the property of Cold Shot Chillers and is not to be 

copied or used without permission from Cold Shot Chillers.

8. Design, specifications, and components are subject to change without notice.

9. Options and alternate design and components may exist and are typically dependent on design and specific parts used 

for the system.

LINE LEGEND

FACTORY SUPPLIED/INSTALLED

DETAILS

FACTORY OPTION

FIELD SUPPLIED/INSTALLED

TERMINAL BLOCK CONTACT #

#

09

10

11

LINE#

12

13

14

15

16

17

18

01

02

03

04

05

06

07

08

COMPONENT CODES

AUX

Auxiliary (contact block)

BZ

Buzzer

CC#

Compressor Contactor 1 or 2

CCH

Crankcase Heater

COM

Common

CR#

Control Relay:

CR1

CR for Cooling Mode Status

CR2

CR for Active Cooling On

CR3

CR for Chiller Pump functions

CR4

CR for Process Pump functions

CR5

CR for Remote ON/OFF Operation

CR6

CR for Tank Level Control

DB

Distribution Block

DT

Digital Temperature Controller

F

Fuse

F1/F2

Fuse 1 and 2 (Transformer Primary)

F3

Fuse 3 (120VAC Control Voltage)

F4

Fuse 4 (24VAC Control Voltage)

FC

Fan Contactor

FPS

Fan-Cycling Pressure Switch

FST

Flow Safety Thermostat

FZT

Freeze Safety Thermostat

GND

Ground

HG

Hot Gas

HPS

High Pressure Switch

L

Line

LAR

Low Ambient Relay

LAT

Low Ambient Thermostat

LFS

Liquid Flow Switch

LPS

Low Pressure Switch

LT1

Light 1 for Cooling Status – OK

LT2

Light 2 for Cooling Status – Fault Condition

M

Motor

MS

Motor Starter

NC

Normally Closed

NO

Normally Open

PC1

Pump Contactor 1 (Chiller Pump)

PC2

Pump Contactor 2 (Process Pump)

PLC

Programmable Logic Controller

PM

Phase/Voltage Monitor

PS

Power Supply

RC

Run Capacitor

SW1

Selector Switch (Pump/Off/Cooling)

SW2

Selector Switch (Process Pump)

SW3

Local/Remote Switch

TB

Terminal Block

TC

Thermocouple (Type J only)

TLH

Tank Level Switch – High

TLL

Tank Level Switch – Low

TLM

Tank Level Switch – Mid

TRAN

Transformer

* PAGE NOTES

1. CONTROL TRANSFORMERS MUST BE WIRED/TAPPED FOR THE APPROPRIATE INCOMING 

VOLTAGE.

2. TRANSFORMERS: ONE OR TWO TRANSFORMERS MAY BE USED.  ONE DUAL VOLTAGE OR 

TWO INDEPENDENT VOLTAGES.

3. COMPONENTS AND DESIGN ARE DEPENDENT ON SYSTEM DESIGN.  (SINGLE PHASE 

VERSIONS ARE AVAILABLE).

4. FAN SPEED CONTROLLER WILL BE INSTALLED ON #2 FAN ON 120 TO 150 MODELS AND 

INSTALLED ON #3 ON 180 AND 240 MODELS.  120 AND 150 MODELS HAVE 2 FANS.  180 AND 240 

MODELS HAVE 3 FANS.

Depending on design, the fan motor may be 

changed from standard model.

RC3

M

Fan

(See Page Note #4)

FPS

CC1 – L2

CC1 – T3 (for 10 to 20 Ton)

LAR

(Option)

1

2
3

OPTION: 6 - LAFS1

LOW AMBIENT FAN SPEED CONTROL FOR SINGLE PHASE MOTOR

OPTION CODE VARIATIONS

LAFS1-5 208/230V  Model

LAFS1-6 460V  Model

LAFS1-1 575V  Model

L1

M1

L2/N

FSC

P266 Model

CC1 – T1? (for 2 to 7-½ Ton)

0VAC

LAR

LAT

BRN

24VAC

BRN

GRY

24VAC

A C

Pressure Transducer

(Class 2 Wiring for all P266 Models)

BLK

WHT

RED

Connected to

Liquid Line

V
P
C

P1

GRY

NOTES

Single phase motors require a differential voltage to operate.  Therefore, 

electrical connection to two phases of a 3-phase system or both phases of a 1-

phase system.  Depending on original wiring configuration of a condensing unit, 

the connections may vary, such as, from L1 to L3, L1 to L2, L2 to L3, T1 to L2, 

T2 to L3, etc.

Function of LAR is to switch one of the voltage lines between the standard 

voltage and the Fan Speed Controller.