Product data

Options and accessories (cont)

LOW AMBIENT CONTROLS

Standard units are designed to operate in cooling at outdoor temperatures down to 25 F (for size 004-012 units) and 40 F (for size 014,016 units).

With accessory Motormaster control (condenser-fan cycling) units can operate at outdoor temperatures down to –20 F. The head pressure con-

trols, which mount in the condenser section, control the condenser-fan motor to maintain correct condensing temperature.

MOTORMASTER IV CONTROL

(CONDENSER FAN CYCLING)

MOTORMASTER I, III CONTROL

(CONDENSER FAN SPEED MODULATOR)

MOTORMASTER II CONTROL

(CONDENSER FAN CYCLING)

When used with accessory/optional economizer, the baro-

metric relief or power exhaust accessory helps to relieve

building overpressurization.

NOTE: This is not available with horizontal supply adapter

curb.

BAROMETRIC RELIEF/POWER EXHAUST

(014,016 Shown)

EMERGENCY HEAT CONTROL PACKAGE

Emergency heat control package allows emergency operation

of electric heat and fans by bypassing compressor circuits and

outdoor thermostats.