Specifications
FEATURES/BENEFITS (cont)
LIGHTWEIGHT, COMPACT SIZE — The small footprint of
these units provides additional benefits. Exclusive aero-
acoustics make these units the most compact in the industry.
Because they require minimal service and airflow clearances,
outdoor units can be located virtually anywhere — on the
ground, roof, balcony, under a deck, or even mounted to an out-
side wall.
The outdoor unit can be mounted on any type or weight roof,
and the indoor units take up little valuable, rentable space.
Because they are duct-free, not having to run large ductwork
leaves additional space to be rented or utilized, making the
building even more profitable.
In addition, the small size makes these units easily moveable.
When floor plans change, the units can be quickly reinstalled.
EASY-TO-USE CONTROLS — The microprocessor-based
control in the high-wall unit is easy to use, permitting quick
changes for maximum comfort. The microprocessor offers the
ultimate in comfort and efficiency. All units automatically restart
and retain their memories after a power failure, eliminating
unnecessary service calls and service disruption. High-wall
units are equipped with a wireless remote controller. Under-
ceiling and in-ceiling cassette units feature standard 24v con-
trols with new solid-state multifeatured electronic thermostats.
All units can be easily integrated into most building control sys-
tems, and offer auto-changeover from heating to cooling mode
and back.
WIDE RANGE OF ACCESSORIES — Customizing the duct-
free split systems to your application is easily accomplished
through the many accessories available. Low-ambient tempera-
ture capability (permitting cooling operation down to –20 F out-
door ambient) is easily added on all units.
Accessories for the high-wall and ceiling-suspended fan coils
include an internal condensate pump to provide installation flex-
ibility. Condensate pumps are standard on in-ceiling cassettes.
Ventilation-air capability is available as an accessory on ceiling
suspended units and in-ceiling cassettes. In addition, limited
ducting capability is available to connect in-ceiling cassettes (for
example, to duct to an adjacent room).
AGENCY LISTINGS — All systems are listed with ARI (Air Con-
ditioning & Refrigeration Institute), UL (Underwriters’ Labor-
atories), CSA (Canadian Standards Association), and CEC
(California Energy Commission).
LEGEND
1—Start Capacitor and Relay
2—Lockout
3—3-Pole Contactor
4—High-Voltage Terminal Block
5—Time Temperature Solid-State
Defrost Board (Not used with 619E
fan coil units)
6—Low-Voltage Terminal Block
7—Accumulator
8—Liquid Line Low-Pressure Switch
9—High-Pressure Switch
10 — Acoustic Lining
11 — Crankcase Heater
12 — Isolated Compressor/Control Area
13 — Discharge and Suction Pressure
Gage Ports
14 — Reversing Valve
UNIT SHOWN IS 538B HEAT PUMP
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