AAON CB-024 User Manual

2
Table of Contents
AAON
®
CB Series Features and Options Introduction .................................................................. 5
Safety .............................................................................................................................................. 6
CB Base Model and Features Description .................................................................................... 10
General Description ...................................................................................................................... 11
Codes and Ordinances .............................................................................................................. 11
Receiving Unit .......................................................................................................................... 11
Storage ...................................................................................................................................... 12
Direct Expansion (DX) Condensing Units ............................................................................... 12
Wiring Diagrams ....................................................................................................................... 13
General Maintenance ................................................................................................................ 13
Installation..................................................................................................................................... 14
Lifting the Unit ......................................................................................................................... 14
Locating Unit ............................................................................................................................ 14
Mounting Isolation .................................................................................................................... 15
Access Panel ............................................................................................................................. 15
Electrical ................................................................................................................................... 16
Thermostat ................................................................................................................................ 17
Refrigerant Piping ..................................................................................................................... 18
General .................................................................................................................................. 18
Determining Refrigerant Line Size ....................................................................................... 18
Liquid Line Sizing ................................................................................................................ 19
Suction Line Sizing ............................................................................................................... 20
Hot Gas Bypass Line ............................................................................................................ 22
Hot Gas Reheat ..................................................................................................................... 22
Predetermined Line Sizes ..................................................................................................... 23
Startup ........................................................................................................................................... 26
Compressors .............................................................................................................................. 26
Charging Refrigerant & Adjusting Refrigerant Charge ............................................................ 27
Before Charging .................................................................................................................... 27
Checking Liquid Sub-cooling ............................................................................................... 27
Checking Evaporator Superheat ........................................................................................... 28
Adjusting Sub-cooling and Superheat Temperatures ........................................................... 28
Air Flow .................................................................................................................................... 29
Operation....................................................................................................................................... 31
Thermostat Operation ............................................................................................................... 31
Compressor ............................................................................................................................... 31
Variable Capacity Compressor Controller ................................................................................ 31
Low Ambient Operation ........................................................................................................... 34
LAC Valve ................................................................................................................................ 35
Condenser Flooding .................................................................................................................. 36

AAON CB-024 Specifications

General

Brand	AAON
Model	CB-024
Category	Heat Pump
Language	English