System information

3
RECEIVING AND INSTALLATION
Check equipment
Identify unit
The unit model number and serial number are stamped on the
unit rating/identification plate. Check this information against
shipping papers.
Inspect shipment
Inspect for shipping damage while unit is still on shipping
pallet. If unit appears to be damaged or is torn loose from its
anchorage, have it examined by transportation inspectors
before removal.
Forward claim papers directly to transportation company.
Manufacturer is not responsible for any damage incurred in
transit.
Check all items against shipping list. Immediately notify the
nearest Carrier office if any item is missing. To prevent loss or
damage, leave all parts in original packages until installation.
Provide unit support
Roof curb
Install accessory roof curb in accordance with instructions
shipped with curb. (Fig. 4) Install insulation, cant strips,
roofing, and flashing. Ductwork must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasketing material
supplied with the roof curb. Improperly applied gasketing
also can result in air leaks and poor unit performance.
Curb should be level (Fig. 5) to within 6 mm. This is necessary
for unit drain to function properly. Refer to accessory roof curb
installation instructions for additional information as required.
Slab mount
Place the unit on a solid, level concrete pad that is a minimum
of 100 mm thick with 50 mm above grade (Fig. 6). The slab
should extend approximately 50 mm beyond the casing on all
four sides of the unit. Do not secure the unit to the slab except
when required by local codes.
Ground mount
The unit may be installed either on a slab or placed directly on
the ground if local codes permit. Place the unit on level ground
prepared with gravel for condensate discharge.
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 precau-
tions 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.
WARNING: Improper installation, adjustment, alteration,
service, maintenance, 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-authorised
kits or accessories when modifying this product.
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 legislation.
Refer to national and local plumbing or waste water codes
and other applicable local codes.
WARNING: Before performing service or maintenance
operations on system, turn off main power to unit. Turn off
accessory heater power switch if applicable. Electrical shock
could cause severe injury or death.
CAUTION: Puron (R-410A) systems operate at higher
pressures than standard R-22 systems. Do not use R-22 service
equipment or components on Puron (R-410A) equipment.
Ensure service equipment is rated for Puron (R-410A).
INTRODUCTION
The 50JZ heat pump is fully self-contained and designed for
outdoor installation. Standard units are shipped in a horizontal
discharge configuration for installation on a ground-level slab.
Standard units can be converted to downflow (vertical) discharge
configurations for rooftop applications.