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TREATED EVAPORATOR AND CONDENSER COILS
When environmental conditions are harsh and airborne contaminants are a problem, a degrading of the coil surfaces could
occur. To help mediate this problem, coils could be treated with an optional acrylic or heresite coating. Please contact your
distributor for suggestions and application assistance.
CONDENSER DUCT
If your unit is operating in an office, server/computer room or other finished space, condenser duct may be used to handle
the hot condenser air or condenser make-up air. 12 inch round duct is used on the discharge of the MAC1211, 1811, and
3612/32. The MAC6012/32/34 use 1, 16 inch round duct. The MAC9032/34 use 2, 16 inch round duct.
CEILING PANEL/DUCT KIT ASSEMBLY
An optional ceiling discharge kit (CDK) may be used to discharge condenser warm air into a drop ceiling space. The CDK-
12 consists of a 2' x 2' lay-in ceiling panel, 8 feet of flexible duct, and a 12 inch diameter duct flange that attaches to the top
of the unit over the air discharge opening. The CDK-16 has similar components for larger, 16 inch diameter duct. Installation
can be accomplished in 2 steps:
1) Place the 2' x 2' drop-in ceiling panel in the drop ceiling above the unit.
2) Attach the duct flange to the unit with the machine screws supplied with the kit.
Installation is complete.
Non-ventilated ceiling must be large enough to handle the warm air generated by the unit. Best case is to vent into only
“VENTED” ceiling areas.
Check your local codes for any special “drop ceiling space” requirements. Comply with all ordinances.
OPTIONAL FEATURES
COLD AIR DISCHARGE NOZZLE KIT
Optional nozzles are used to direct the cold evaporator air to specific areas or spots. Thus the term “spot” cooling was
coined. Spot cooling is generally used in commercial and industrial applications such as production lines to cool people or
processes, or to cool equipment that generates heat such as computers or telecommunication products. You may have seen
them on the sidelines of sporting events to cool the athletes. The nozzles are made of Virgin white PVC 100, ribbon locked,
bendable, self-supporting, resistant to corrosion/ rust, abrasion, solvents, acid and chemicals. The black tips (finishing rings)
are made of soft plastic providing an attractive finish and protection from sharp edges. The nozzle construction is firm, and
when aimed at a spot, the nozzle will maintain that position until changed.
The NZ-5 is used on the MAC1211, 1811. It consists of 2, 5-inch nozzles with a compressed length of 16 inches and ap-
proximate extended length of 24 inches.
The NZ-6 is used on the MAC3612. It consists of 2, 6-inch nozzles with a compressed length of 16 inches and approximate
extended length of 24 inches.
The NZ-8 is used on the MAC6012, 32 and 34. It consists of 2, 8-inch nozzles with a compressed length of 16 inches and
approximate extended length of 24 inches.
The NZ-10 is used on the MAC9032/34. It consists of 2, 10-inch nozzles with a compressed length of 16 inches and ap-
proximate extended length of 24 inches.
DUCT FLANGE
An optional duct flange can be attached to the condenser discharge (hot) air opening on the top of the unit. Round duct can
then be attached to it. The CDF-12 (Condenser Duct Flange) is 12 inches in diameter and fits models MAC12 and 18. The
CDF-16 is 16 inches in diameter and is included (installed) on models MAC60 and 90.
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