Carrier Comfort 48VL-C, Installation Instructions Manual

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1
48VL---C, 48VL---D
Comfort
t
14 SEER Single---Packaged Air
Conditioner and Gas Furnace System with Puron

(R---410A) Refrigerant
Single Phase 2---5 Nominal Tons (Sizes 24---60)
Three Phase 3---5 Nominal Tons (Sizes 36---60)
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--12 . . . . . . . . . . . . . . . . .
Check Equipment 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identify Unit 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspect Shipment 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Unit Support 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Roof Curb 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slab Mount 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Fabricate Ductwork 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provide Clearances 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rig and Place Unit 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rigging/Lifting of Unit 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Condensate Drain 8 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Flue Hood 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Gas Piping 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Duct Connections 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Units for Downflow (Vertical)
Discharge
10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Electrical Connections 11 . . . . . . . . . . . . . . . . . . . . . . . .
High--Voltage Connections 11 . . . . . . . . . . . . . . . . . . . . . . . .
Special Procedures for 208--V Operation 11 . . . . . . . . . . . . . .
Control Voltage Connections 12 . . . . . . . . . . . . . . . . . . . . . . .
Standard Connection 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heat Anticipator Setting 12 . . . . . . . . . . . . . . . . . . . . . . . . . .
Transformer Protection 12 . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRE--START--UP 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP 13--24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check for Refrigerant Leaks 13 . . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Heating & Make Adjustments 13 . . . . . . . . . . . . . . . .
Check Heating Control 13 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Gas Input 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust Gas Input 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Burner Flame 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Operation 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Airflow and Temperature Rise 22 . . . . . . . . . . . . . . . . . . . . . .
Heating Sequence of Operation 22 . . . . . . . . . . . . . . . . . . . . .
Limit Switches 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rollout Switch 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start--Up Cooling & Make Adjustments 22 . . . . . . . . . . . . . . . .
Checking Cooling Control Operation 22 . . . . . . . . . . . . . . . .
Checking & Adjusting Refrigerant Charge 23 . . . . . . . . . . . .
Indoor Airflow and Airflow Adjustments 23 . . . . . . . . . . . . .
Cooling Sequence of Operation 24 . . . . . . . . . . . . . . . . . . . . .
A170030
Fig. 1 -- Unit 48VL--C, 48VL--D
(Low NOx Model Available)
MAINTENANCE 51--54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filter 51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Blower and Motor 51 . . . . . . . . . . . . . . . . . . . . . . . . .
Induced Draft (Combustion Air) Blower 52 . . . . . . . . . . . . . .
Flue Gas Passageways 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limit Switch 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner Ignition 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Burners 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal of Gas Train 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Coil, Indoor Coil, & Condensate Drain Pan 52 . . . .
Outdoor Fan 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Controls and Wiring 53 . . . . . . . . . . . . . . . . . . . . .
Refrigerant Circuit 54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Input 54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evaporator Airflow 54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Puron Items 54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP CHECKLIST 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions