27VNA3 Infinity® Variable Speed Heat Pump: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
5
Step 6 – Make Piping Connections
Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct size
and condition. Federal regulations require that refrigerant is not vented
into the atmosphere. Recover during system repair or final unit disposal.
For tubing requirements beyond 80 ft. (24.38 m), substantial capacity
and performance losses can occur. Follow the pipe sizing
recommendations in the 27VNA3 Product Data to manage these losses.
Refer to Table 1 for field tubing diameters. Refer to the Product Data for
accessory requirements.
Refrigerant pipe should be installed with the minimum length possible
and practical for the application. Piping should be protected from
physical damage in operation and in service and be in compliance with
national and local codes such as ASHRAE 15, ASHRAE 15.2, IAPMO
Uniform Mechanical Code, ICC International Mechanical Code, or CSA
B52. When piping is installed through studs in a wall, steel plates should
be used for protection with a minimum thickness of 16 gauge.
All field joints shall be accessible for inspection prior to being covered
or enclosed.
Note:.Do not apply capillary tube indoor coils to these units.
Outdoor Unit Connected to Factory-Approved
R-454B Indoor Unit
When outdoor unit is connected to factory-approved R-454B indoor
unit, the outdoor unit contains correct system refrigerant charge for
operation with smallest factory-approved, AHRI-rated indoor unit
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.
NOTE: If the indoor furnace coil width is more than the furnace casing
width, refer to the indoor coil Installation Instructions for transition
requirements.
Mechanical Line Set Connections
If using mechanical or crimp-type line set connections, follow crimp tool
manufacturer's instructions.
NOTE: Should the use of mechanical fittings cause failure of the fittings
or failure of the equipment, such would not be covered under the
standard warranty.
WARNING
!
PERSONAL INJURY AND ENVIRONMENTAL
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.
Federal regulations require that refrigerant is not vented into the
atmosphere. Recover during system repair or final unit disposal.
CAUTION
!
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. PVE oil in compressor is extremely
susceptible to moisture absorption. Always keep ends of tubing sealed
during installation.
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 in. (152.4 mm) 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).
Table 1 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (in.)
UNIT SIZE
LIQUID VAPOR
*
*.Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length line sets.
Connection
Diameter
Tube
Diameter
Connection
Diameter
Max (Rated)
Diameter
Minimum Tube
Diameter
27VNA336
3/8 3/8 7/8 7/8 5/8
27VNA348
3/8 3/8 7/8 1-1/8 3/4
27VNA360
3/8 3/8 7/8 1-1/8 3/4
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