York K3EU180 Nomenclature, Accessories-Fieldinstalled Cont, Application Flexibility, Steam Coils

036-21300-002-A-0905

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ACCESSORIES-FIELD INSTALLED (CONT.)

HOT WATER COILS

These drainable coils have 2 rows of 1/2" copper tubes, 12 aluminum fins per inch, a casing that is finished to match the exterior of the basic unit, but no water control valve. The coils slide out of their casings for easy field installation. They should be mounted over the return air opening on 5, 7-1/2 and 10-ton units—between the unit coil and blower sections on 15-ton units.

STEAM COILS

These non-freeze coils have 1 row of 1" copper tubes, a 5/8" copper tube inside each 1" tube to distribute the steam evenly across the entire length of the coil, 8 aluminum fins per inch, a casing that is finished to match the exterior of the basic unit, but no steam control valve. The coils slide out of their casings for easy field installation and are pitched in their casings to facilitate condensate drainage. They should be mounted over the return air opening on 5, 7-1/2 and 10-ton units—between the unit coil and blower sections on 15-ton units.

SUSPENSION KIT

Suspension kit 1HH0451 is available for 15-ton units installed horizontally. The accessory includes two channel iron sup- ports and the hardware to secure them to the top of the unit. The hanger rods must be supplied by the field.

THERMOSTATS

Wall-mounted thermostats and subbases (24-volt) with sys- tem and fan switches are available to control the operation of these split system air conditioners.

APPLICATION FLEXIBILITY

MODELS 5, 7-1/2 & 10 TON

These units are built in a single cabinet with two condensate drain pans. This allows the units to be installed in either the vertical or horizontal position for maximum flexibility.

On vertical applications, the air velocity across the cooling coil keeps the condensate from dripping off the finned sur- face onto the filters.

On horizontal applications, the unit must be installed with the condensate drain pan under the entire cooling coil.

•The Supply Air Plenum and the Return Air Grill accesso- ries can be used on either arrangement.

•The Base accessory can only be used on the vertical arrangement.

Units installed horizontally are designed for ceiling suspen- sion. Four 3/8"-16 weld nuts are provided in the angle sup- ports on the front of the unit (the side with the logo). Knockouts are provided in the exterior panels for access to these weld nuts. The hanger rods must be supplied in the field.

Unitary Products Group 3