4
Table 1 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (in.)
UNIT SIZE
LIQUID
RATED VAPOR*
Connection
Diameter
Tube
Diameter
Connection
Diameter
Tube
Diameter
25HPA624
3/8
3/8
3/4
3/4
25HPA636
3/8
3/8
7/8
7/8
25HPA648
3/8
3/8
7/8
1---1/8
25HPA660
3/8
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 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, refer to the Residential Piping and Longline Guideline using Puron refrigerant.
Table 2 – 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)
REQUIRED FOR SEA
COAST APPLICATIONS
(Within 2 miles/3.22 km)
Crankcase Heater
Standard
Standard
Standard
Evaporator Freeze Protection
Standard with Infinity
t
Control
(Low Ambient not allowed with non---
communicating thermostat)
No
No
Liquid---Line Solenoid Valve
No
Yes
No
Low---Ambient Control
Standard with Infinity Control
(Low
ambient not allowed with non---commu-
nicating thermostat)
No
No
Puron Refrigerant Balance Port
Hard---ShutOff TXV
Yes
{
Yes
{
Yes
{
Support Feet
Recommended
No
Recommended
Winter Start Control
Standard with Infinity Control
(Low Ambient not allowed with non---
communicating thermostat)
No
No
* 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 length), refer 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.
25H
PA
6