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Depending on the type of HRV/ERV installation, you may have
timers in areas such as restrooms. The timer will override the
Operational Mode (regardless of the setting) and initiate high
speed ventilation. Upon completion of the timer cycle, the
HRV/ERV will return to your selected Operational Mode and
speed setting
DET-II 20/40/60 Minute Timer
Initiates high speed ventilation for 20, 40 or 60 minutes. The
20/40/60 Minute Status Lights indicate high speed operation.
Lockout Mode is useful if you wish to disable the timer. Set
lockout by holding the Select Button for 5 seconds. Unlock by
holding for 5 seconds.
Connect to 3 wire 20 gauge low voltage wire. Mounts in a
standard 2" x 4" electrical box.
Optional Timers
Select Button
20/40/60 Minute
Status Lights
Key Features
• The Dehumidistat measures the indoor humidity level and will
initiate high speed ventilation when the moisture level in the
home exceeds the set point on the control.
• Once the humidity in the house is reduced, the HRV will revert
back to its previous setting.
• The Dehumidistat should be set to OFF for all season except the
heating season.
• Connect to 3 wire 20 gauge low voltage wire.
Humidity Control
Your HRV will produce a dehumidifying effect when outdoor
humidity levels are lower than indoor humidity levels. Never use
the dehumidistat feature when outdoor temperatures are above 59
F (15 C).
Note: The indoor humidity level is measured at the control.
Setting the Dehumidistat
Press and release the DEHUMIDISTAT button until the
DEHUMIDISTAT LIGHT is at the desired setting. After 5
seconds the dehumidistat light will either flash or be on
continuous.
A flashing light indicates the humidity level is higher than the
setting and the unit is operating on high speed ventilation. A
continuous light indicates the humidity level is lower than the
setting. Refer to the unit's Operation & Installation Manual for
instructions on how the Dehumidistat works.
The DH-II Dehumidistat
%
80
20
Instruction card
Dehumidistat Indicator
LEDs
Set to the desired humidity
level. High speed ventilation
will initiate when the indoor
moisture level exceeds the set
point on the control
ON/OFF
button
Summary of Contents for Heat Recovery Ventilator HRV 120SRD
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