Carrier 90MA User Manuals

Table of Contents

• SAFETY CONSIDERATIONS

  1
• GENERAL

  1
• INSTALLATION

  1
• Step 1- Inspect Unit

  1
• Step 2 - Protect Unit from Damage

  1
• Step 3 - Provide Unit Support

  1
• Step 4 - Rig and Place Unit

  8
• Step 5 - Install Accessory Plenum (If Supplied)

  8
• Step 6 – Check Fan Shaft and Wheel Alignment

  9
• Step 7 - Install Ventilation Ductwork (If Required)

  9
• Step 8 - Check Return-Air Filters

  9
• (*08 & *12)

  9
• Step 10 - Make Condenser Connections

  9
• Step 11 - Install Unit Drain Line

  11
• Step 12 - Make Electrical Connections

  12
• OPERATION

  12
• To Start Unit

  12
• To Shut Down Unit

  12
• Service Valves

  12
• SERVICE

  13
• Return-Air Grill Removal

  13
• Access Panel Removal

  13
• Evaporator Fan Adjustment

  13
• Lubrication

  13
• Return-Air Filters

  13
• Condensate Drains

  13
• Evaporator Coil

  14
• Water Regulating Valve

  14
• Condenser

  14
• Charging the System

  15
• Evaporator Fan Motor Removal

  15
• Pressure Relief Device

  15
• Crankcase Heater

  15
• Cycle-LOCTM Protection Device

  15
• Discharge And Suction Pressure Switches

  16
• Oil Charge

  16
• WIRING SCHEMATIC - *04/*06

  17
• COMPONENT ARRANGEMENT - *04/*06

  18
• WIRING SCHEMATIC - *08/*12

  19
• COMPONENT ARRANGEMENT - *08/*12

  20
• UNIT SUPPORT DRAWINGS

  21