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Thermostatic Expansion Valve (TXV) is a precision device
used to modulate the flow of refrigerant entering the
evaporator coil at the same rate as the refrigerant being
boiled off in the evaporator coil. The TXV also provides the
necessary pressure drop within the system to separate the
high and low pressure sides of the system. This separation
allows the low pressure refrigerant to absorb heat.
The cabinet of the Model 1750/1770 is fully insulated with a
1" insulation that is designed to reduce unit operating
sound levels, prevent condensation from forming on the
exterior of the unit, and prevent the possibility of heat gain
when the unit is located in higher temperature locations,
such as mechanical rooms or above ceilings.
The evaporator coil features a unique lanced fin and
double row tube design, giving the Model 1750/1770 better
surface contact with the moisture-laden air. The R-22
refrigerant within the coil provides the maximum
temperature differential required for the air to reach
dewpoint sooner, removing more moisture. These features
provide the unit with a 60% SHR rating at 80˚F and 60% RH.
The Model 1750/1770 can be controlled two ways; by using
the control that is integrated into the cabinet of the unit, or
by using a separate Model 70 control mounted in the
occupied space. When the integral control is utilized, it is
designed as a “set it and forget it control”, the only
interaction required is through a “more” or “less” dry
adjustment knob located on the inlet side of the unit. When
the Model 70 control is utilized, it becomes the sensor,
determines unit operation, and display the space RH%.
Inlet and Discharge connections are designed for 8"
insulated, flexible duct or can be ducted with standard 8"
round or spiral duct.
The unit is equipped with a safety disconnect switch that
will completely shut the power off during any service or
maintenance.
The internal blower is a direct drive forward curved blower
designed to deliver the air flow required for air “sampling”
and distribution. The unit is designed to deliver the proper
amount of air quietly and efficiently.
SPECIFICATION SHEET
DEHUMIDIFIER
MODEL 1750/1770
Model 1750
Model 1770
PRODUCT SPECIFICATIONS
5
6
7
5
4
1
2
3
2
1
5
6
7
4
3
MODEL 1750 PERFORMANCE
AT INLET AIR CONDITIONS AND 275 CFM
MODEL 1770 PERFORMANCE
AT INLET AIR CONDITIONS AND 500 CFM