Unit installation

ManualsBrandsMcQuay ManualsHeat PumpACZ 045A

2 ACZ 010A through 039A IOMM ACZ1-2

Table of Contents

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

General Description..........................................3

Inspection.........................................................3

Installation........................................................3

Handling...........................................................3

Location ...........................................................4

Service Access..................................................4

Vibration Isolators............................................6

Chilled Water System.......................................7

Refrigerant Piping ............................................9

Unit Component Location..............................13

Control Layout and Operation.......13

Control Center................................................13

Start-up and Shutdown ...................14

Pre Start-up.....................................................14

Start-up...........................................................14

Sequence of Operation ...................................14

Physical Data....................................16

Electrical Data..................................18

Field Wiring ...................................................18

Dimensional Data.............................23

System Maintenance........................24

General...........................................................24

Lubrication.....................................................24

Electrical Terminals........................................24

Condensers.....................................................24

Refrigerant Sight glass ...................................24

Standard MicroTech II Controller.25

Table of Contents ...........................................25

Overview........................................................26

General Description .......................................26

Automatic Adjusted Limits.............................28

Dynamic Default Values.................................29

Control Functions and Definitions .................30

Unit Enable ....................................................31

Unit Mode......................................................32

Power Up Start Delay.....................................32

Unit State........................................................32

Evaporator Fan State Control.........................33

Condenser Fans..............................................33

Low OAT Start...............................................34

Capacity Overrides.........................................34

Low Ambient Lockout....................................35

Compressor Control .......................................35

Normal Shutdown ..........................................36

Rapid Shutdown.............................................36

Liquid Line Solenoid......................................36

Using the Controller.......................................37

Service...............................................48

Thermostatic Expansion Valve.......................48

Filter-Driers....................................................48

Liquid Line Solenoid......................................48

Optional Controls...........................................49

Troubleshooting Chart....................................51

MODEL CODE

C Z XXX A

"McQuay" is a registered trademark of McQuay International

2005 McQuay International

Illustrations and data cover the McQuay International products at the time of publication

and we reserve the right to make changes in design and construction at anytime without notice.

Air-Cooled

Condensing

Scroll Compressor

Vintage

ominal Tons