Carrier 38AKS028-044 - Manual (Page 19)

Fan Adjustment — Adjust fan as shown in Fig. 14.
Oil Charge — Compressors are factory charged with oil
as follows:
COMPRESSOR
AMOUNT
pints (liters)
06E9265 20.0 (9.4)
06E9275 20.0 (9.4)
06E9299 19.0 (9.0)
When additional oil or a complete charge is required, use
only Carrier-approved compressor oil:
Petroleum Specialities Inc. . . . . . . . . . . . . . . . . . .Cryol 150
Texaco, Inc. . . . . . . . . . . . . . . . . . . . . . . . . .Capella WF-32
Witco Chemical Corp. . . . . . . . . . . . . . . . . . . .Suniso 3 GS
IMPORTANT: Do not use drained oil or use oil that
has been exposed to atmosphere. Refer to Carrier Train-
ing Booklet, GTAC II, Module 5, for procedures to
add oil. To remove oil, isolate the compressor, reclaim
internal compressor charge, and use the compressor drain
plug.
Liquid Shutoff/Charging Valve — Valve is located
inside the compressor compartment and is provided with
1 ⁄
4
-in. flare connection for field charging.
Capacity Control — Capacity control is by 2 suction
pressure actuated unloaders. Each controls 2 cylinders. Un-
loaders are factory set (see Table 1A or 1B) but may be field
adjusted. Number 1 unloader is on cylinder bank on same
side of compressor as terminal box.
CONTROL SET POINT — The control set point (cylinder
load point) is adjustable from 0 to 85 psig (0 to 586 kPag).
To adjust, turn control set point adjustment nut (Fig. 15) clock-
wise to its bottom stop. In this position, set point is
85 psig (586 kPag). Then, turn adjustment counterclockwise
to desired control set point. Every full turn counterclock-
wise decreases set point by 7.5 psig (52 kPag).
PRESSURE DIFFERENTIAL — The pressure differential
(difference between cylinder load and unload points) is ad-
justable from 6 to 22 psig (41 to 152 kPag). To adjust, turn
pressure differential adjustment screw (Fig. 15) counter-
clockwise to its backstop position. In this position, differ-
ential is 6 psig (41 kPag). Then, turn adjustment clockwise
to desired pressure differential. Every full turn clockwise in-
creases differential by 1.5 psig (10 kPag).
NOTE: Dimension in ( ) is in millimeters.
Fig. 14 — Location of Prop on Motor Shaft from
Outside of Orifice Ring
Fig. 15 — Capacity Control Valve
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