Installation Guide

INSTALLATION AND USER GUIDE FOR DEHUMIDISTAT CONTROL (PART NO. VTDEHUMW)
 Cut a 2
7
/8” x 1¾” hole in a wall, at a
convenient location for the control.
Route a cable (type 22/4) for the
control from the unit to this hole. See
figure at right.
 Temporarily place the control over the
hole and mark both mounting screw
hole positions.
Remove the control, drill both screw
holes (3/16” Ø) in wall and insert the wall
anchors (included).
Ø 3/16", typ.
VC0215A
 Unplug the ventilation unit.
23846 rev. 03
VC0191
!
VC0216
Mount the control to the wall.
Strip the end of the cable to access the 4 wires (about 3”). Strip the
end of each wire (about 1/4”). Connect the wires to the terminals,
regardless of the wire color. Note which wire color has been
chosen for each terminal. See illustration below.
VC0236
Gnd
D+
12V
D-
Perform the electrical connection to the terminal
connector of the unit, as shown below. For more details, refer to
the installation manual of the ventilation unit.
NOTE: To avoid miswiring, refer to the notes taken at step

to match the wire color with the right terminal.
Gnd
D+
12V
D-
VC0235
Electrical wiring must be done by quali ed personnel in accordance with all applicable codes and standards.
Before connecting wires, unplug the unit or switch power off at service panel and lock service disconnecting means
to prevent power from being switched on accidentally. Always wear safety glasses and gloves while performing
these instructions.
WARNING
The illustrations in this document are generic; your control appearance may be slightly different from the ones shown.
READ AND SAVE THESE INSTRUCTIONS
INSTALLATION
NOTE: If the control is to be installed in an electric box, go to step .
 Plug the ventilation unit and test the wall control.
HOW TO USE THE CONTROL
The main button works following this
sequence:
• Click 1 = 30% RH
• Click 2 = 35% RH
• Click 3 = 40% RH
• Click 4 = 45% RH
• Click 5 = 50% RH
• Click 6 = 55% RH
• Click 7 = Dehumidistat disabled
• and so on
The indicator lights up as per the selected
RH. If the set point is exceeded, the system
will operate in MAX speed until the set
point is reached. The dehumidistat will
deactivate if outside temperature exceeds 75°F (24°C).
• Press the CONT button to get continuous exchange ventilation
in MIN speed (CONT light LED indicator) or MAX speed (CONT
dark LED indicator). To quit this mode, press the CONT button.
• Press the INT button to get intermittent ventilation. The INT
indicator will light up. Within a one hour period, the system will
operate in MIN speed for 20 minutes. To quit this mode, press
the INT button.
• If the maintenance indicator is lit, it means that the filter
needs to be cleaned or replaced. Once the filter is cleaned
or replaced, press the INT button for five seconds to reset the
maintenance indicator. If the maintenance indicator flashes, the
LCD screen on the unit will give the error code. Refer to the
Troubleshooting section in the ventilation unit user guide for
more information.
• At unit first boot, INT and CONT indicators blink alternately for
about 1 minute. If indicators continue blinking after this period,
it means that the communication cannot be established with
the ventilation unit. Make sure wires are correctly connected to
the wall control and unit terminals (refer to step 7).
!
If ducts have to go through an unconditioned space (e.g.: attic), always use insulated ducts to prevent condensation
formation inside and outside ducts, which could cause material damage and/or mold growth. Moreover, if fresh air
to building duct and/or stale air from building duct goes/go through an unconditioned space, the unit must be set
to operate continuously in cold conditions (below 10°C/50°F). Continuous air movement inside ducts will prevent
condensation formation. The unit can be stopped temporarily for maintenance and/or repair purposes in such
conditions. (Refer to section 2.2 from unit User and Installer Manual for more details.)
CAUTION