Step 7 -- Make Piping Connections
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.
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.
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
ram) vertical rise at service valve. Refrigerant tubing lengths
up to 36 in. (914.4 ram) may be buried without further
special consideration. Do not bury lines longer than 36 in.
(914.4 ram).
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. Follow
the pipe sizing recommendations in the 25VNA Product data to
manage these losses.
Refer to Table 1 for field tubing diameters. Refer to Table 2 for
accessory requirements.
Table 1 - Refrigerant Connections and Recommended Liquid and Vapor 1hbe Diameters (in.)
LIQUID VAPOR*
UNIT SIZE Connection Tube Connection Max (Rated) Minimum Tube
Diameter Diameter Diameter Diameter Diameter
25VNA024 3/8 3/8 7/8 7/8 5/8
25VNA036 3/8 3/8 7/8 7/8 5/8
25VNA048 3/8 3/8 7/8 1- 1/8 3/4
25VNA060 3/8 3/8 7/8 1- 1/8 3/4
Units are rated with 25 It. (7.6 m) of lineset. See Product Data sheet for performance data when using different size and length line sets.
Notes:
1. Do not apply capillary tube indoor coils to these units.
2. For Tubing Set lengths between 80 and 200 It. (24.38 and 60.96 m) horizontal and / or greater than 20 It. (6.1 m) vertical differential, an accessory Liquid Line
Solenoid must be installed.
Table 2 - Accessory Usage
REQUIRED FOR Installations with Radio
REQUIRED FOR LONG LINE REQUIRED FOR SEA
ACCESSORY LOW-AMBIENT COOLING APPLICATIONS* COAST APPLICATIONS Frequency Interference
APPLICATIONS Concerns in the Range
(Below 55°F/12.6°C) (Over 60 ft/24.38 m) (Within 2 miles/3.22 km) of 2 to 30 MHZ
Crankcase Heater Standard Standard Standard Standard
Evaporator Freeze Protection Standard with Infinity TM Control No No No
Liquid-Line Solenoid Valve No Yes No No
Low-Ambient Control Standard with Infinity Control No No No
Puron Refrigerant Balance Port Yes1" Yes]- Yes1" Yes1"
Hard-ShutOff TXV
Support Feet Recommended No Recommended No
Winter Start Control Standard with Infinity Standard with Infinity Standard with Infinity Standard with Infinity
Control Control Control Control
EMI Kit No No No Yes
For tubing set lengths between 80 and 200 It. (24.38 and 60.96 m) horizontal or 20 It. (6.10 m) vertical differential (total equivalent length), an accessory
Liquid Line Solenoid must be installed.
1- Required on all indoor units. Standard on all new Puron refrigerant fan coils and furnace coils.
Standard = Standard for all new Puron refrigerant fan coils and furnace coils.
To Next Page
Loading...
Need help?
General
