Carrier 38AKS028-044 Installation, Start-up And Service Instructions Manual

Contents

Fan Adjustment — Adjust fan as shown in Fig. 14.Oil Charge — Compressors are factory charged with oilas follows:COMPRESSOR AMOUNTpints (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, useonly Carrier-approved compressor oil:Petroleum Specialities Inc. . . . . . . . . . . . . . . . . . .Cryol 150Texaco, Inc. . . . . . . . . . . . . . . . . . . . . . . . . .Capella WF-32Witco Chemical Corp. . . . . . . . . . . . . . . . . . . .Suniso 3 GSIMPORTANT: Do not use drained oil or use oil thathas been exposed to atmosphere. Refer to Carrier Train-ing Booklet, GTAC II, Module 5, for procedures toadd oil. To remove oil, isolate the compressor, reclaiminternal compressor charge, and use the compressor drainplug.Liquid Shutoff/Charging Valve — Valve is locatedinside the compressor compartment and is provided with1⁄4 -in. flare connection for field charging.Capacity Control — Capacity control is by 2 suctionpressure actuated unloaders. Each controls 2 cylinders. Un-loaders are factory set (see Table 1A or 1B) but may be fieldadjusted. Number 1 unloader is on cylinder bank on sameside of compressor as terminal box.CONTROL SET POINT — The control set point (cylinderload 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 is85 psig (586 kPag). Then, turn adjustment counterclockwiseto 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, turnpressure differential adjustment screw (Fig. 15) counter-clockwise to its backstop position. In this position, differ-ential is 6 psig (41 kPag). Then, turn adjustment clockwiseto 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 fromOutside of Orifice RingFig. 15 — Capacity Control Valve19