User Manual

COOLING COIL PIPING

HBX:

Installation,

Operation,

and

Maintenance

Instructions

COOLING COIL PIPING

These fan coil units are supplied with a direct expansion refrigerant coil. The

suction and liquid refrigerant lines must be sized in accordance with the

outdoor unit manufacturer’s recommendations.

CAUTION: When connecting piping to fan coil units, do not bend or reposition the coil header

tubing for alignment purposes. This could cause a tubing fracture

resulting in a

refrigerant leak when pressure is applied to the system.

Condensate drain lines must be installed with adequate slope away from the

unit to assure positive drainage. Since the drain pan is located on the suction

side of the blower, a negative pressure exists at the drain pan. HBX fan coil

units require a minimum trap of 1-1/2 inches provided in the drain line to

assure proper drainage.

WARNING: On units with plastic drain pans the drain connections must be made hand tight

only.

AUXILIARY

CONDENSATE

SWITCH

Auxiliary condensate switch may be installed in lieu on auxiliary drain line as

permitted by local code.

NOISE

These fan coil units are designed for quiet operation, however, all air

conditioning equipment will transfer some amount of noise to the conditioned

space. This should be taken into consideration when planning the location of

the equipment.