R-407C, R-404A,and R-134aunits | Carrier 90MA, 90MU instruction

compressor equipped units and on the suction line on all other units.

Oil Charge - All units are factory charged with oil. On 06D compressors, observe the oil level in the sight glass at start-up. If unit oil level is below sight glass, add oil until level reaches approximately 1/4 sight glass.

If oil charge is above sight glass, do not remove any oil until the compressor crankcase heater has been energized for at least 24 hours.

When additional oil or a complete charge is required, use only the following Carrier approved oil.

R-407C, R-404A, and R-134a units

Castrol - Icematic SW68

ICI - Emkarate RL68HP

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations

Printed in U.S.A.	Pg 16	90MA-3SI SUPERCEDES FORM 62-02971-00 09-2009
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Carrier 90MA, 90MU specifications R-407C, R-404A,and R-134aunits

Contents

Single-PackageMarine Cooling Units COMPONENT ARRANGEMENT - *04/*06COMPONENT ARRANGEMENT - *08/*12 Installation, Operation and Service Instructions FPT = Female Pipe Thread MPT = Male Pipe Thread ODF = Outside Diameter Female FPT = Female Pipe Thread MPT = Male Pipe Thread Page FPT = Female Pipe Thread MPT = Male Pipe Thread ODF = Outside Diameter Female FPT = Female Pipe Thread MPT = Male Pipe Thread ODF = Outside Diameter Female FPT = Female Pipe Thread MPT = Male Pipe Thread FIGURE 2 - UNIT DIMENSIONS Step 4 - Rig and Place UnitFIGURE 1 - BASE UNIT INTERIOR DETAILS TYPICAL UNIT SHOWN FIGURE 3 - HORIZONTAL WHEEL CENTERING FIGURE 4 - CONCENTRIC WHEEL ALIGNMENTStep 10 - Make Condenser Connections FIGURE 5 - TYPICAL CONDENSER WATER PIPING FIGURE 6 - CONNECTION LOCATIONS FIGURE 7 - CONDENSATE DRAIN TRAP OPERATION Step 12 - Make Electrical ConnectionsTo start unit To Shut Down Unit FIGURE 8 - FAN PULLEY ADJUSTMENT SERVICEReturn-AirGrille Removal FIGURE 9 - GRAVITY FLOW METHOD Water Regulating ValveFIGURE 10 - FORCED CIRCULATION METHOD Charging the System 90MU R-407C, R-404A,and R-134aunits FOR NOTES AND LEGEND, SEE FIGURE FIGURE 12 WIRING SCHEMATIC - 90MA/MU*04/*0690MA-3SISUPERCEDES FORM FIGURE 13 COMPONENT ARRANGEMENT - 90MA/MU*04/*06 90MA-3SISUPERCEDES FORM FOR NOTES AND LEGEND, SEE FIGURE FIGURE 14 - ELECTRICAL SCHEMATIC - 90MA/MU*08/*1290MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM 90MA-3SISUPERCEDES FORM