Allied Lennox 4AC16LT Series Manual de instrucciones de instalación - Página 8

Navegue en línea o descargue pdf Manual de instrucciones de instalación para Aire acondicionado Allied Lennox 4AC16LT Series. Allied Lennox 4AC16LT Series 20 páginas. Split system air conditioner

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Capacity

4AC16LT -24, -36

4AC16LT -48

4AC16LT -60

Table 3.

To install an expansion valve (see Figure 9):

1. Separate the distributor assembly and remove the

piston orifice and used Teflon seal. Insert nozzle end

of the expansion valve along with a new Teflon seal

into the distributor and tighten to 20 - 30 ft. lbs. Use

backup wrench on all wrench flats. Over-tightening

will crush the Teflon seal and may cause a leak.

Attach liquid line portion of distributor assembly along

with new Teflon seal to the inlet of the expansion

valve. Tighten to 20 - 30 ft. lbs. Use backup wrench on

all wrench flats. Over-tightening will crush the Teflon

seal and may cause a leak.

Connect the external equalizer line to the equalizer

port on the suction line and tighten to 8 ft. lbs.

Strap the superheat sensing bulb to the suction

header.

If installing an expansion valve on an indoor coil that

previously used a fixed orifice, be sure to remove the

existing fixed orifice. Failure to remove a fixed orifice when

installing an expansion valve to the indoor coil will result in

improper operation and damage to the system.

Manifold Gauge Set

Manifold gauge sets used with systems charged with

R410A refrigerant must be capable of handling the higher

system operating pressures. The gauges should be rated

for use with pressures 1 - 800 on the high side and a low

side of 30" vacuum to 250 psi with dampened speed to

500 psi. Gauge hoses must be rated for use at up to 800

psi of pressure with a 4000 psi burst rating.

Liquid and Suction Line Service Valves

The liquid line and suction line service valves (Figure 9)

and service ports are used for leak testing, evacuation,

charging, and checking charge.

Each valve is equipped with a service port which has a

factory-installed Schrader valve. A service port cap protects

the Schrader valve from contamination and serves as the

primary leak seal.

Page 8 of 20

Part Number

A4TXV01

A4TXV02

H4TXV03

Issue 1827

To Access the Schrader Port

1. Remove the service port cap with an adjustable

wrench.

Connect gauge to the service port.

When testing is completed, replace service port cap.

Tighten finger tight, then an additional 1/6 turn.

To Open Liquid or Suction Line Service Valve

1. Remove stem cap with an adjustable wrench.

Use service wrench with a hex-head extension to

back the stem out counterclockwise as far as it will go.

Use a 3/16" hex head extension for liquid line service

valves and a 5/16" extension for suction line service

valves.

Replace the stem cap. Tighten finger tight, then

tighten an additional 1/6 turn.

To Close Liquid or Suction Line Service Valve

1. Remove the stem cap with an adjustable wrench.

Use a service wrench with a hex-head extension to

turn the stem clockwise to seat the valve. Tighten

firmly.

Replace the stem cap. Tighten finger tight, then

tighten an additional 1/6 turn.

Suction Line (Ball Type) Service Valve

Suction line (ball type) service valves function the same

way as the other valves; the difference is in the construction

(Figure 10).

The ball valve is equipped with a service port with a factory-

installed Schrader valve. A service port cap protects the

Schrader valve from contamination and serves as the

primary seal.

Leak Testing

After the line set has been connected to the indoor and

outdoor units, the line set connections and indoor unit

must be checked for leaks.

506467-01