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SYSTEM SETUP
ONOFF
MODEL70 MODEL70
REMOVABLE
SENSOR
BOARD
10006367 8.09
B2203506D
No tools required – snap the front cover back on the backing plate, being careful to align the 6-pin
terminal block on the cover with the receptacle on the backing plate.
1. Turn the HVAC equipment back on to normal operating set points.
2. Turn the Dehumidifier main power on using the toggle switch at the rear (outlet) of the unit.
3. Press the “ON” button on the Model 70 to allow the Dehumidifier to operate.
The Model 70 Control should show a solid “ON” on the display.
4. The factory default setting is 3 bars. Adjust the buttons to obtain a different set point level,
if desired. NOTE: After initial power-up, the dehumidifier will not run until 2–6 minutes have
elapsed for system initialization.
4. Slide excess cable back into the wire entry
wall opening and fill the hole with insulation.
Failure to seal the hole can cause drafts to
enter the control and effect humidity (moisture
level) sensing accuracy.
5a. If connecting to a Central Dehumidifier
with Integrated Sensor Control Board
(Figure 4):
Ensure that Switch 1 in the “SYSTEM SETUP”
block on the Integrated Sensor Control Board
has been set to “MODEL 70 ON”.
5b. If connecting to a Central Dehumidifier
with Removable Sensor Control Board
(Figure 5):
• There is no switch that is required to be
moved as the dehumidifier auto senses the
connection to a Model 70 during power up.
• In coastal areas, due to high concentrations
of salt present in the air, we recommend
removing the sensor board from the
dehumidifier after the Model 70 is
installed.
RESEARCH PRODUCTS CORPORATION
1015 E. Washington Ave. • Madison, WI 53703 • Phone: 608/257-8801 •Fax: 608/257-4357 • www.aprilaire.com
STEP 5. REASSEMBLE THE CONTROL
STEP 6. PERFORM CHECK-OUT
F
igure 4 – Integrated Sensor Control Board
Figure 5 – Removable Sensor Control Board
90-1489
90-1486