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Field connections, low voltage, Operation, System variations – GeneralAire DH70 Dehumidifier User Manual

Page 5: Humidity control - standard, Remote humidity control (wall mounted)

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5

Field Connections, Low Voltage

When a remote Humidistat is utilized, set the unit mounted humidistat to the “OFF” position.

Typical Equipment Layout Specification & Duct Connection

Blower InterLock Connections (Low Voltage)

Fan Coil / Air Handler

Control Thermostat (Typ)

G

W

Y

Existing Field Supplied

Control Wiring (Typ)

Field Supplied Control Wiring

Disconnect Existing Control Wiring
From Fan (G) Control Terminal

Reconnect to Blue Wire From DVA

Connect Brown Wire From DVA

To Fan (G) Terminal

Org Brn

Blu

GT

GF

RF

R C D

G Gt Gf Rf

*

Remove Jumper for Independent Fan Control

R

Close on RH Rise

Optional Humidistat

*

R

G

W

Y

Air Handler

DH 70

Return Air

Supply Air

Out Side Air (OSA) Hood

Manual OSA Damper

24 Volt Motorized Damper

( Power Open- Spring Closed)

With Bug Screen

(Volume Adjustment)

Optional Outside Air Ventilation

Operation

The DH70 is designed to deliver dehumidified, filtered air to the living space, and is equipped with an onboard
humidistat and fan control and can be equipped with various accessories to enhance its operation, including a remote
humidistat, and your system may incorporate any or all of the described operational components

It is recommended that the indoor environment maintain a maximum relative humidity level of 50% to 60%. Other
factors may dictate a relative humidity level different than the recommended, such as musical instruments, antiques,
books/papers, or special situations. Winter minimum humidity levels of 30-35% may not be attainable without
supplemental humidification (Humidifier), and may not be desired during times of low outdoor temperatures.

System Variations:

Humidity Control - Standard

The system may be installed as free standing or incorporate ducting to an area or existing heating/cooling system.
Control is provided by Humidistat with a dial stem type adjustment built into the unit. Set the desired humidity set
point by turning the dial stem flat to the corresponding set point indicated on the face of the unit. This humidity
control unit will operate the compressor and circulation fan when the dehumidification system is activated, working
only when there is a call, or demand for dehumidification.

Remote Humidity Control (Wall Mounted)

When a remote Humidistat is utilized, set the unit mounted humidistat to the “OFF” position.
This control provides the same control functions as above but with greater precision and can be located in the space
for easier access, and may include additional features. Available as an accessory item these controls may have
different features; refer to instructions included with the control.