Carrier R-22 Spezifikationen PDF herunterladen (Seite 12)

Pressure differential (difference between cylinder

load point and unloader points)

Turn the adjusting screw 햵 counter-clockwise to its back stop

position. In this position the differential is 41 kPa. The pressure

differential is set by turning the adjusting screw clockwise. Each

full turn increases the differential by 10 kPa. Approximately 10

turns clockwise will increase the pressure to 152 kPa.

The capacity control factory settings for 4-cylinder units are:

475 kPa gauge control setpoint (cylinder load point), 70 kPa

differential, 405 kPa gauge cylinder unload point.

The settings for 6-cylinder units are: the left cylinder bank

setpoint is 482 kPa gauge (70 kPa differential); the right

cylinder bank setpoint is 469 kPa gauge (70 kPa differential).

Fig. 7 - Pressure-operated control valve

Modifications

It is possible to convert pressure-controlled capacity reductions to electrically controlled reductions or to add capacity reductions

in accordance with the table below.

38AJ/AZ Pressure-controlled Possibility of changing Possibility of 2

unloader standard press. to electric unloader pressure-contr. unloaders

008 -- -

010 -- -

012 -- -

014 yes yes yes

018 yes yes yes

024 yes yes yes

030 yes yes yes

036 yes yes yes

046 yes yes yes

062 yes yes yes

074 yes yes yes

Low and high pressure switch control and condensing pressure pressostat control

Pressostat control: High pressure, kPa Low pressure, kPa Condensing pressure, kPa

38AJ/AZ Opens Closes Opens Closes Opens Closes

008-012 2500 2150 50 150

014-036 2900 2200 50 150 870 1820

046-074 2900 2500 240 390 870 1820

Legend:

1 Control setpoint adjustment screw

2 Valve body

3 Sealing cap (covering the differential adjustment screw)

4 Differential pressure adjustment screw

1 2 ... 7 8 9 10 11 12 13 14 15 16

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Carrier R-22 Spezifikationen Seite 12