3
Make Piping Connections
!
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.
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. POE oil in compressor is
extremely susceptible to moisture absorption. Always keep
ends of tubing sealed during installation.
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 more 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 Long Line Guideline for Split--System
Air Conditioners and Heat Pumps will reduce these losses. Refer to
Table 1 for accessory requirements. Refer to Table 2 for field
tubing diameters.
There are no buried--line applications greater than 36 in. (914.4
mm).
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.
Outdoor Unit Connected to Factory Approved Indoor
Unit
Outdoor unit contains correct system refrigerant charge for
operation with 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.
Table 1 – Accessory Usage
Accessory
REQUIRED FOR LOW---AMBIENT
COOLING APPLICATIONS
(Below 55
°
F / 12.8
°
C)
REQUIRED FOR LONG LINE
APPLICATIONS* (Over 80 ft. / 24.38 m)
Crankcase Heater
Yes
Yes
Compressor Start Assist Capacitor and Relay
Yes
Yes
Evaporator Freeze Thermostat
Yes
(For non ---Infinity systems only)
No
Liquid Line Solenoid Valve
No
See Long---Line Application Guideline
Low---ambient Pressure Switch
Yes
(For non ---Infinity system only)
No
Support Feet
Recommended
No
Thermal Expansion Valve (TXV)
Hard Shutoff
Yes
Yes
Winter Start Control
Yes
(For non ---Infinity systems only)
No
* For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Residential Split--- System Longline Application Guideline.
Table 2 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.)
UNIT SIZE
LIQUID
RATED VAPOR
up to 80 ft. (24.38 m)*
Connection and Tube
Diameter
Connection
Diameter
Rated Tube
Diameter
18, 24, 30,
3/8
3/4
3/4
36, 37, 42, 43, 48
3/8
7/8
7/8
60
3/8
7/8
1---1/8
* Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length linesets.
Notes
:
1. Do not apply capillary tube or fixed orifice indoor coils to these units.
2. For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 35 ft. (10.7 m) vertical differential 250 ft. (76.2 m) Total Equivalent Length),
refer to the Residential Piping and Application Guideline --- Air Conditioners and Heat Pumps using Puron refrigerant.
3. For alternate liquid line options on 18---42 size units, see Product Data or Residential Piping and Application Guideline
the environmentally sound refrigerant
This product has been designed and manufactured to meet
Energy Star
criteria for energy efficiency when matched
with appropriate coil components. However, proper
refrigerant charge and proper air flow are critical to achieve
rated capacity and efficiency. Installation of this product
should follow all manufacturing refrigerant charging and air
flow instructions.
Failure to confirm proper charge and
air flow may reduce energy efficiency and shorten
equipment life.
Use of the AHRI Certified
TM Mark indicates a
manufacturer’s
participation in the
program For verification
of certification for individual
products, go to
www.ahridirectory.org.
Ready for use in a Hybrid Heat
r
Duel Fuel system.
24AN
B
6
