Carrier 50ET - Manual

HEATING A COOLING
50ET.QT
Single-Package Units
Installation, Start-Up and Service Instructions
Heat Pump and Cooling Unit Chassis Only, Sizes 212-230
CONTENTS
Page
SAFETY CONSIDERATIONS.................................... I
INTRODUCTION....................................................... 1
INSTALLATION ....................................................... 1-4
Step 1 — Check Equipment and Jobsite................I
• UNPACK UNIT
• INSPECT EQUIPMENT
• INSPECT WALL SLEEVE
Step 2 — Install Chassis in Wall Sleeve...............1-3
• INSTALL ACCESSORY OUTDOOR GRILLE
• INSTALL ACCESSORY COLD CLIMATE
PACKAGE IF REQUIRED
• SLIDE CHASSIS INTO SLEEVE
Step 3 — Install Accessory Thermostat
and Connect Thermostat Wiring........................... 3,4
• TO MOUNT THERMOSTAT IN UNIT
• TO MOUNT THERMOSTAT REMOTELY
Step 4 — Set Indoor Fan Motor Speed...................4
Step 5 — Install Accessory Electric Heater
If Required.................................................................4
START-UP................................................................4,5
SERVICE...................................................................5-I4
SAFETY CONSIDERATIONS
Installing and servicing air conditioning equipment
can be hazardous due to system pressure and electrical
components. Only trained and qualified service personnel
should install or service air conditioning equipment.
Untrained personnel can perform basic maintenance,
such as cleaning and replacing filters. All other opera­
tions should be performed by trained service personnel.
When working on air conditioning equipment, observe
precautions in literature and on tags and labels attached
to unit.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available.
A WARNING
Before installing or servicing unit, turn off main
power to system. There may be more than one
disconnect switch. Turn off accessory heater power
if applicable. Electrical shock can cause personal
injury._________________________________________
IMPORTANT: Final wiring inspection by local
authorities must be done before chassis is installed
in sleeve.
A WARNING
The Model 50ET,QT chassis is an uncased unit and,
therefore, requires special care in handling to prevent
injury to installer and damage to unit. A portable
lifting device must be used to move and position unit.
Be careful of sharp edges when handling chassis.
INTRODUCTION
Install Model 50ET air conditioner or 50QT heat pump
chassis in accessory wall sleeve. See Table 2 for part
numbers. Wall sleeves are shipped separately with accom­
panying installation instructions. All electrical power,
ductwork and condensate drain hookups are made at
time of wall sleeve installation.
IMPORTANT; Carrier standard outdoor grille or
deluxe outdoor grille must be ordered separately and
installed in wall sleeve before chassis is installed. Do
not run unit without proper outdoor grille in place.
See Table 2 for part numbers.
INSTALLATION
Step 1 — Check Equipment and Jobsite
UNPACK UNIT — Move to final location. Lift card­
board carton off chassis taking special care not to
damage unit.
INSPECT EQUIPMENT for damage prior to installa­
tion. To remove metal cover plate, remove 6 screws. File
claim with shipping company if shipment is damaged or
incomplete.
Leave chassis bolted to skid and replace metal cover
plate and carton until ready for installation into wall
sleeve.
INSPECT WALL SLEEVE installation for damage.
Condensate drain pan must be free of debris and installed
in accordance with local building regulations. Electrical
connector on left side of sleeve should be free of dirt,
grease, paint, etc. Connector must be properly wired
before chassis installation. Duct connection panel must
be level and duct connections complete. Do not rest
weight of ductwork on duct connector panel. Inspect
nameplate on sleeve to ensure wire and fuse sizing is
correct for model size and heater accessory to be installed.
NOTE: If remote thermostat location is desired, location
must be determined and field wiring must be installed
before wall completion.
Step 2 — Install Chassis in Wall Sleeve —
Remove sleeve filler panel and save screws.
INSTALL ACCESSORY OUTDOOR GRILLE — In­
stall outdoor grille using screws saved Refer to instruc­
tions shipped with outdoor grille.
INSTALL ACCESSORY COLD CLIMATE PACK­
AGE IF REQUIRED — Cold climate accessory should
be installed where the outdoor ambient temperature
consistently falls below 30 F. Refer to Table 2 for correct
accessory part number. Refer to instructions packaged
with aceessory for installation.
IMPORTANT. Be sure disconnect, per NEC,
installed with the wall sleeve is in OFF position
before proceeding with chassis installation.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.
Book |1 |1 |4 |4 PC 131 Catalog No 535-078 Printed inUS A Form 50ET,QT-3SI Pgl 5-85 Replaces: 50QT-10SI
For replacement items use Carrier Specitied Parts Tab Ilbl5ahal5a