Bryant R-22 Spezifikationen PDF herunterladen (Seite 18)

SSP-SVX15C-EN

gauge ports.

9. Leak test the entire system. Using proper

procedures and caution, as described in the

previous section, repair any leaks found and repeat

the leak test.

Insulating and Isolating

Refrigerant Lines

Insulate the entire suction line with refrigerant piping

insulation. Also insulate any portion of the liquid line

exposed to temperature extremes. Insulate and isolate

liquid and suction lines from each other. Isolate

refrigerant lines from the structure and any duct work.

IImmppoorrttaanntt::

1. To prevent possible noise or vibration

problems, be certain to isolate

refrigerant lines from the building.

2. All suction and hot gas bypass piping (if

installed) should be insulated from the

termination in the air handler to the

condensing unit cabinet entry. Failure to

do so can cause condensate drip off and

performance degradation.

3. Prior to starting a unit, it is advisable to

have the approved oils available in the

event oil needs to be added to the

system.

NNOOTTIICCEE

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Table 2. R-22 TWA approved oils

Unit Model Number

Approved Oils

TWA090A, TWA120A,

TWA180B, TWA240B

Trane Oil Part Number OIL00027

(1 quart container)

For units equipped with compressors containing site

glasses, the oil level must be visible through the sight

glass when the compressor is running under stabilized

conditions and a few minutes after the compressor has

stopped.

Refrigerant Charging Procedure

If charging by weight, refer to Table 3, p. 18 for starting

change. If refrigerant adjustments are needed because

of length of line, refer to ”Charging Charts and

Superheat,” p. 25.

Charge by weight through the gauge port on the liquid

line. Once the charge enters the system, backseat

(open) the liquid line service valve and disconnect the

charging line and replace the cap on the gauge port.

NNootteess::

• R-22 should only be charged in the liquid

state.

• When possible, always charge the

refrigerant into the liquid line of the unit.

• If the entire charge can’t be charged into the

liquid line, the balance of the unit charge can

be metered through a charging manifold set

as liquid — preferably through a schrader

valve into the suction line to the compressor

— only while the compressor is running.

• Check and adjust superheat using Table 6, p.

25, then re-check charging charts to

determine if charge corrections are

necessary.

NNOOTTIICCEE

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lliinnee ooff tthhee uunniitt wwiitthh tthhee ccoommpprreessssoorr ooffff..

Figure 11. Outdoor units - refrigerant piping

IInnssttaallllaattiioonn

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 39 40

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