Unitary Ducted Split AC
14
5.3.5 Elevate Unit
CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
Unit must be kept free of an accumulation of water and/or ice in the basepan.
Elevate unit per local climate and code requirements to provide clearance above estimated
snowfall level and ensure adequate drainage of unit. If using accessory support feet, use installation
instructions from kit for installation.
5.3.6 Make Piping Connections
WARNING
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.
CAUTION
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 inch vertical rise at service valve.
Refrigerant tubing lengths up to 36 inch may be buried without further special consideration.
Do not bury lines longer than 36 inch.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
To prevent damage to unit or service valves, observe the following:
Use a brazing shield
Wrap service valves with wet cloth or use a heat sink material.
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
80ft., substantial capacity and performance losses can occur. Follow the recommendations in the
Long Line Guideline for long line application. Refer to Table 8 for accessory requirements. Refer
to Table 9 for field tubing diameters. If refrigerant tubes or indoor coil are exposed to atmosphere,
they must be evacuated to 500 microns to eliminate contamination and moisture in the system.
Table 8—Accessory Usage
Accessory
Required for low-ambient
applications(below 55°F)
Required for long line
applications(Over 80
ft.)
Required for sea coast
applications(within 2
miles)
Crankcase Heater
Yes
Yes
No
Evaporator Freeze
Thermostat
Yes
No
No
