Operating Ambient; Elevate Unit; Make Piping Connections - Carrier 25HNA6 Installation Instruction

Operating Ambient
The minimum outdoor operating ambient in cooling mode is
55°F/12.78°C without low ambient cooling enabled, and the
maximum outdoor operating ambient in cooling mode is
125°F/51.67°C. On Infinity communicating systems only (for
both 25HNA6 and 25HNA9), low ambient cooling is available to
0°F/-17.78°C.
The maximum outdoor operating ambient in heating mode is
66°F/18.89°C on all models.
Elevate Unit
UNIT OPERATION HAZARD
Make Piping Connections
PERSONAL INJURY AND UNIT DAMAGE
HAZARD
Failure to follow this warning could result in personal
injury or death.
Relieve pressure and recover all refrigerant before system
repair or final unit disposal. Use all service ports and open
all flow-control devices, including solenoid valves.
Failure to follow this caution may result in equipment
damage or improper operation.
Do not allow water and/or ice to build up in base pan.
Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate
drainage of unit.
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Locate the unit in such a way that it is stable in all
circumstances including adverse weather conditions.
In Long-Line Applications, Install Liquid-Line
Solenoid Valve (LSV)
For refrigerant piping arrangements with equivalent lengths greater
than 80 ft. (24.38 m) and/or when elevation difference between
indoor and outdoor unit is greater than ---20 ft. (---6.10 m), follow
all requirements of the Long-Line Guideline--Air Conditioners
and Heat Pumps Using Puron® refrigerant. If required by
Long-Line Guideline, install LSV kit, part no. KHALS0401LLS,
specifically designed for Puron® refrigerant heat pumps. LSV
should be installed within 2 ft. (0.61 m) of outdoor unit with flow
arrow pointing toward outdoor unit. Follow the Installation
Instructions included with accessory kit.
IMPORTANT: Flow arrow must point toward outdoor unit.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not leave system open to atmosphere any longer than
minimum required for installation. POE oil in compressor is
extremely susceptible to moisture absorption. Always keep
ends of tubing sealed during installation.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
If ANY refrigerant tubing is buried, provide a 6 in. vertical
rise at service valve. Refrigerant tubing lengths up to 36 in.
(914.4 mm) may be buried without further special
consideration, Do not bury lines longer than 36 in. (914,4
mm).
Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. For tubing requirements beyond 80 ft. (24.38
m), substantial capacity and performance losses can occur.
Following the recommendations in the Application Guideline and
Service Manual-Residential Split-System Air Conditioners and
Heat Pumps Using Puron® Refrigerant will reduce these losses.
Refer to Table 1 for field tubing diameters. Refer to Table 2 for
accessory requirements.
Outdoor Unit Connected to
Factory-Approved
Indoor
Unit
Outdoor unit contains correct system refrigerant charge for
operation with factory-approved, ARI-rated indoor unit with
highest sales volume when connected by 15 ft. (4.57 m) of
field-supplied or factory-accessory tubing, and factory-supplied
filter drier. Check refrigerant charge for maximum efficiency.