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Accessory
Compressor Start Assist Capacitor
and Relay
Crankcase Heater
Evaporator Freeze Thermostat
Liquid Line Solenoid Valve
Low---Ambient Pressure Switch
Puron Refrigerant Balance Port
Hard Shutoff TXV
Support Feet
Winter Start Control
* For tubing set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 35 ft. (10.7 m) vertical differential (total equivalent length), refer to the
Residential Piping and Long Line Guideline.
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.
Federal regulations require that you do not vent refrigerant
to 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.
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. Rated tubing diameters shown in Table 2 are
recommended up to 80 ft. (24.38 m).
acceptable alternate vapor diameters and associated capacity losses.
For tubing requirements beyond 80 ft. (24.38 m), substantial
capacity and performance losses can occur. Following the
recommendations in the Residential Piping and Longline
Guideline will reduce these losses. Refer to Table 2 for field tubing
diameters. Refer to Table 1 for accessory requirements.
There are no buried- -line applications greater than 36- -in. (914.4
mm) allowed.
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 1 – Accessory Usage
Required for
Low Ambient
Cooling Applications
Utilizing 2--- Stage
Cooling Applications
Thermostat on 17 SEER
Models Only
(Below 55° F / 12.8° C)
(Below 55° F / 12.8° C)
No
Yes
(standard on some units)
(standard on some units)
Yes (kit required)
Infinity Control
(no kit required)
No
Yes (kit required)
Infinity Control
(no kit required)
Yes
(standard w/factory
(standard w/factory
approved indoor unit)
approved indoor unit)
Recommended
Recommended
Yes (kit required)
Infinity Control
(no kit required)
See Product Data for
Required for
Low Ambient
Required for Long Line
Applications*
Utilizing UI
No
No
Yes
Yes
(standard on some units)
Standard with
No
No
No
Standard with
No
Yes
Yes
(standard w/factory
approved indoor unit)
No
Standard with
No
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.
NOTE: If the indoor furnace coil width is more than the furnace
casing width, refer to the indoor coil Installation Instructions for
transition requirements.
WARNING
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal injury
or equipment damage.
PuronR refrigerant systems operate at higher pressures than
standard R- -22 systems. Do not use R- -22 service equipment
or components on PuronR refrigerant equipment.
Refrigerant Tubing Connection Outdoor
Connect vapor and liquid tubes to fittings on vapor and liquid
service valves (see Table 2.) Use refrigerant grade tubing.
Table 2 – Refrigerant Connections and Recommended Liquid
and Vapor Tube Diameters (In.)
LIQUID
Connection
UNIT SIZE
& Max. Tube
Diameter
724
3/8
124
3/8
736, 136
3/8
748, 148
3/8
760, 160
3/8
* 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 Longline Guide
line --- 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
3
Required for Sea
Coast
Applications
(within 2 miles/3.2 km)
No
No
No
No
No
Yes
(standard w/factory
approved indoor unit)
Recommended
No
RATED VAPOR*
Connection
Tube
Diameter
Diameter
3/4
3/4
7/8
7/8
7/8
7/8
7/8
1-1/8
7/8
1-1/8
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