To Next Page

To Previous Page

25VNA4: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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.

* Units are rated with 25 ft. (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 ft. (24.38 and 60.96 m) horizontal and / or greater than 20 ft. (6.1 m) vertical differential, an accessory Liquid Line Solenoid must be installed.

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. (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

longer than 36 in. (914.4 mm).

Table 1 – Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (in.)

UNIT SIZE

LIQUID VAPOR*

Connection

Diameter

Tube

Diameter

Connection

Diameter

Max (Rated)

Diameter

Minimum Tube

Diameter

25VNA424 3/8 3/8 3/4 3/4 5/8

25VNA436 3/8 3/8 7/8 7/8 5/8

25VNA448 3/8 3/8 7/8 1-1/8 3/4

25VNA460 3/8 3/8 7/8 1-1/8 3/4

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)

*. 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), an accessory Liquid Line Solenoid must be

installed.

REQUIRED FOR SEA

COAST APPLICATIONS

(Within 2 miles/3.22 km)

Stator Heater Standard Standard Standard

Evaporator Freeze Protection Standard with Infinity Control No No

Liquid-Line Solenoid Valve No Yes No

Low-Ambient Control Standard with Infinity Control No No

Puron Refrigerant Balance Port

Hard-ShutOff TXV

Yes

†