Carrier Comfort 14 Series Installation Instructions Manual

Installation Instructions
IMPORTANT: Effective January 1, 2015, all split system and
packaged air conditioners must be installed pursuant to applicable
regional efficiency standards issued by the Department of Energy.
NOTE: Read the entire instruction manual before starting the
installation.
NOTE: Installer: Make sure the Owner's Manual and Service
Instructions are left with the unit after installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS ......................... 1
INTRODUCTION ................................... 2
RECEIVING AND INSTALLATION .................. 2-9
Check Equipment .................................. 2
Identify Unit .................................... 2
Inspect Shipment ................................. 2
Provide Unit Support ............................... 2
Roof Curb ...................................... 2
Slab Mount ..................................... 2
Provide Clearances ................................. 2
Rig and Place Unit ................................. 6
Inspection ...................................... 6
Rigging/Lifting of Unit ............................ 6
Select and Install Ductwork ........................... 7
Configuring Units to Downflow (Vertical) Discharge ..... 7
Provide for Condensate Disposal ...................... 8
Install Electrical Connections ......................... 8
High-Voltage Connections ......................... 8
Special Procedures for 208-V Operation ............... 9
Control Voltage Connections ........................ 9
Standard Connections ............................. 9
Transformer Protection ............................ 9
Accessory Electric Heaters Installation ................ 9
Sequence of Operation ............................ 9
PRE-START-UP ................................... 17
START-UP ..................................... 17-20
Checking Cooling 8: Heating Control Operation ........ 17
Check for Refrigerant Leaks ......................... 17
Start-Up Adjustments ............................. 18
Checking & Adjusting Refrigerant Charge ............ 18
Indoor Airflow & Airflow Adjustments .............. 18
Continuous Fan Operation ........................ 19
Defrost Control ................................... 20
Quiet Shift ..................................... 20
Defrost ....................................... 20
MAINTENANCE ................................ 27-32
Air Filter ........................................ 27
Indoor Blower and Motor ........................... 27
Outdoor Coil, Indoor Coil, & Condensate Drain Pan ...... 30
Outdoor Fan ..................................... 30
Electrical Controls and Wiring ....................... 30
Refrigerant Circuit ................................. 30
Indoor Airflow ................................... 30
Metering Devices- TXV & Piston .................... 30
A0g034
Fig. 1 - Unit 50VT-B
Pressure Switches ................................. 30
Loss of Charge Switch ............................. 31
High Pressure Switch .............................. 31
Copeland Scroll compressor (Puron Refrigerant) ......... 31
Refrigerant System ................................ 31
Refrigerant .................................... 31
Compressor Oil ................................. 31
Servicing Systems on Roofs with Synthetic Materials .... 31
Liquid Line Filter Drier ........................... 31
Puron® (R-410A) Refrigerant Charging ............. 31
System Information ................................ 32
Loss of Charge Switch ............................ 32
Check Defrost Thermostat ......................... 32
TROUBLESHOOTING .............................. 32
START-UP CHECKLIST ............................ 32
SAFETY CONSIDERATIONS
Installation and servicing of this equipment can be hazardous due
to mechanical and electrical components. Only trained and
qualified personnel should install, repair, or service this equipment.
Untrained personnel can perform basic maintenance flmctions such
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this
equipment, observe precautions in the literature, on tags, and on
labels attached to or shipped with the unit and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in