50JZ 7-14 kW (024-048)
Single-Package 50Hz Heat Pump Units
with Puron® (R-410A) Refrigerant
Installation, Start-Up and Service Instructions
NOTE:
Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS .....................................................1
Introduction ....................................................................................2
Receiving and Installation..............................................................2
Check Equipment......................................................................2
Identify Unit ........................................................................2
Inspect Shipment .................................................................2
Provide Unit Support................................................................2
Roof Curb ............................................................................2
Slab Mount ..........................................................................2
Ground Mount .....................................................................2
Provide Clearances....................................................................2
Rig and Place Unit....................................................................3
Inspection.............................................................................4
Installation............................................................................4
Select and Install Ductwork .....................................................5
Converting Horizontal Discharge Units To
Downflow (Vertical) Discharge Units ................................7
Provide for Condensate Disposal .............................................7
Install Electrical Connections...................................................9
High-Voltage Connections ..................................................9
Routing Power Leads into Unit ........................................11
Connecting Ground Lead to Ground Lug ........................11
Routing Control Power Wires (24-V) ..............................11
PRE-START-UP ..........................................................................14
START-UP ...................................................................................14
Check for Refrigerant Leaks ..................................................14
Start-Up Adjustments..............................................................14
Checking Cooling and Heating Control Operation ..........14
Checking and Adjusting Refrigerant Charge....................16
Refrigerant Charge ............................................................16
No Charge..........................................................................16
Low Charge Cooling .........................................................16
Heating Mode Change.......................................................16
To Use Cooling Charging Charts .....................................16
Indoor Airflow and Airflow Adjustments ........................16
Defrost Control .......................................................................18
Quiet Shift..........................................................................18
Defrost................................................................................18
MAINTENANCE.........................................................................20
Air Filter..................................................................................21
Indoor Blower and Motor.......................................................21
Outdoor Coil, Indoor Coil, and Condensate Drain................21
Outdoor Fan ............................................................................22
Electrical Controls and Wiring...............................................22
Refrigerant Circuit ..................................................................22
Indoor Airflow ........................................................................22
PURON® Systems Items .......................................................22
System Information.................................................................23
Phase Monitor Control ......................................................23
Loss of Charge Switch......................................................24
Check Defrost Thermostat ................................................24
TROUBLESHOOTING ...............................................................24
Start-Up Checklist........................................................................24
NOTE TO INSTALLER — READ THESE INSTRUCTIONS
CAREFULLY AND COMPLETELY before installing this unit.
Also, make sure the Owner’s Manual and Service Instructions are
left with the unit after installation.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service personnel. When working on air-conditioning
equipment, observe precautions in the literature, tags, and labels
attached to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
Improper installation, adjustment, alteration, service, mainte-
nance, or use can cause explosion, fire, electric shock, or
other occurrences, which could cause serious injury or death
or damage your property. Consult a qualified installer or
service agency for information or assistance. The qualified
installer or agency must use only factory-authorized kits or
accessories when modifying this product.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the product or in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words — DANGER, WARNING, CAU-
TION, and NOTE. Danger identifies the most serious hazards,
which
will
result in severe personal injury or death. Warning
indicates a condition that
could
cause serious personal injury or
death. Caution is used to identify unsafe practices, which
would
result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which
will
result in
enhanced installation, reliability, or operation.
1. The power supply (volts, phase, and hertz) must correspond to
that specified on unit rating plate.
2. The electrical supply provided by the utility must be sufficient
to handle load imposed by this unit.
3. This installation must conform with local building codes and
with IEC (International Electrical Code). Refer to provincial
Visit www.carrier.com
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 5a 5a
PC 101
Catalog No. 005-00008
Printed in U.S.A.
Form 50JZ-C1SI
Pg 1
2–02
Replaces: New
