American Standard ASYSTAT625A Installer's Manual

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® U.S. Registered Trademark
Copyright © 2003 • All Rights Reserved
INSTALLER’S GUIDE
69-1699
ASYSTAT625A
Humidity Control
APPLICATION
The humidity control provides automatic low voltage
control of humidifiers in central heating and cooling
equipment for both humidification and dehumidification
applications. See Fig. 1. It has an spst, snap-acting,
dust-proof switch that opens when humidity rises above
the control setting. It is designed for wall or surface duct
mounting.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a haz-
ardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable
for your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Personal Injury Hazard.
Power supply can cause electrical shock.
Disconnect power supply before beginning
installation.
Location and Mounting
A mounting template is included for mounting the
humidity control next to your thermostat. See Fig. 2.
However, the humidity control can be mounted in any
other convenient location in the living area or equipment
room.
NOTE: The humidity control electrical connections are
not shared with the thermostat.
Fig. 1. Humidity control.
Wall Mounting
IMPORTANT
Mount the control in an area with average
room temperature and average relative
humidity.
Select a location for mounting the humidity control:
1. Hold the mounting template (included) next to
your thermostat. Select the mounting side for the
humidity control. The template is reversible for
mounting on either the left or right side of the
humidity control. See Fig. 2.
2. Mark the holes for the two mounting screws
(included). Then mark the hole for the low voltage
wiring on the template that corresponds with the
side selected in step 1.
3. Remove the template and drill the holes.
4. Run low voltage wiring to the location and pull
about 6 in. (152 mm) of wire through the hole.
5. Plug hole with nonflammable insulation to prevent
drafts from affecting the control operation.
6. Remove the humidity control case from the base.
See Fig. 1.
7. Position the base on the wall with the arrow up.
8. Use the two in. (25 mm) mounting screws to
secure the base to the wall.
M19844
CASE REMOVAL
SLOT
HOLE FOR WIRING
THE DUCT MOUNTING
INSTALLATIONS
Hum
id
ity Cont
rol
Pub. No.: 12-5034-01