3
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.
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.
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. 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 Residential Piping and
Long--Line Guideline 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, AHRI--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.
NOTE: If the indoor furnace coil width is more than the furnace
casing width, refer to the indoor coil Installation Instructions for
transition requirements.
Table 1 – Refrigerant Connections and Recommended Liquid
and Vapor Tube Diameters (in.)
UNIT SIZE
LIQUID RATED VAPOR*
Connection
&Max.Tube
Diameter
Connection
Diameter
Tube
Diameter
024 3/8 3/4 3/4
036 3/8 7/8 7/8
048 3/8 7/8 1-1/8
060 3/8 7/8 1-1/8
* Units are rated with 25 ft. (7.6 m) of l ineset. 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 20 ft. (6.1 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.
Table 2 – Accessory Usage
ACCESSORY
REQUIRED FOR
L O W --- A M B I E N T C O O L I N G
APPLICATIONS
(Below 55°F/12.8_C)
REQUIRED FOR LONG LINE
APPLICATIONS*
REQUIRED FOR SEA
COAST APPLICATIONS
(Within2miles/3.22km)
Compressor Start Assist No Yes No
Crankcase Heater Standard Standard Standard
Evaporator Freeze Protection
Standard with Evolutiont Control
(Low Ambient not allowed with non ---
communicating thermostat)
No
No
Liquid---Line Solenoid Valve No Yes No
Low---Ambient Control
Standard with Evolution Control
(Low ambient not allowed with non ---
communicating thermostat)
No
No
Puron R efrigerant Balance Port
H a r d --- S h u t O f f T X V
Yes{ Yes{ Yes{
Support Feet Recommended
No
Recommended
* For tubing set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 20 ft. (6.10 m) vertical differential (total equivalent l ength), r efer to the Long
Line Guideline—Air Conditioners and Heat Pumps using Puron® Refrigerant.
{ Required on all indoor units. Standard on all new Puron refrigerant fan coils and furnace coils.
286B / 289B
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