Quest IQ Evolution OMM
10
September 2020
•
Outdoor Air (OA) Intake
option
(opening, damper and filter (4)) is available, although very rarely used.
•
Refrigeration coils -
Evaporator
(7) and
Reheat
(internal condenser) (8) - are located directly downstream of
the
Main Filter Rack
(9).
o
Evaporator Bypass Damper
(10) is located next to the evaporator coil. It helps to control compressor
suction pressure by adjusting the amount of air, bypassing the evaporator.
•
Space heater
(11) location, if the dehumidifier is equipped with one, may vary:
o
Hot water
coil is usually located directly downstream of the
reheat
coil;
o
Electric heater
is externally
mounted directly on the dehumidifier’s supply air duct connection.
o
Gas heater
(duct heater or boiler package)
normally is installed externally.
•
Compressor
(13),
Receiver
(14) and other components are located within the
Compressor Compartment
(3)
.
o
Some larger compressors may have VFD (variable frequency drive), located in
Main Electric Panel
.
o
Dehumidifier with
water-cooled
air conditioning option (equipped with dry cooler or connected to
external water-cooling source) would have
plate heat exchanger
(16) as a part of compressor circuit.
•
Main Electric Panel
contains
Main Control Board
(17),
Operator Panel
(18) and other electrical components.
Economiser Option.
Pic. D.1-B shows
dehumidifier, equipped
with Economizer Coil
option:
•
Additional
Economizer
Section
(91) is
located between
Evaporator coil
and
Main Filter
Rack
. Section
includes
Economizer Coil
(92) and three-
way
Mixing
Valve
(93):
o
Economizer coil and mixing valve are piped with plate heat exchanger and external AC water-
cooled equipment (dry cooler etc.)
Control System
The dehumidifier control system is composed of sensors, spread throughout the dehumidifier,
Main Control
Board
,
Operator Panel
and other electric components, located in the
Main Electric Panel.
91
92
93
Pic. D.1-B
