INSTALLATION INSTRUCTIONS
62-0208—3
H7625A, H7635A
Humidity/Temperature Sensors
WALL-MOUNT MODELS
APPLICATION
The H7625A, H7635A Wall-Mount Humidity/Temperature
Sensors are universal Relative Humidity transmitters that
can be powered with either a +18 to 36 Vdc or 24 Vac
supply. The sensors use a half-wave bridge rectifier to
convert AC power to a usable DC voltage. The device
also includes a 20K ohm temperature sensor for optional
use.
The humidity sensors are designed with a field selectable
4 to 20 mA, 0 to 5 Vdc, or 0 to 10 Vdc output signal
equivalent to 0 to 100% RH. All units are shipped from
the factory with a default setting to accept AC power with
three-wire, 0 to 10 Vdc loop-powered output.
INSTALLATION
When Installing this Product...
1.
Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2.
Check ratings given in instructions and on the
product to ensure 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
Electrical Shock or Equipment Damage
Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
CAUTION
Equipment Damage Hazard.
Improper wiring can damage the sensor
beyond repair.
Follow the wiring instructions carefully.
Location
Install the device where it cannot be affected by:
— drafts, or dead spots behind doors and in corners.
— hot or cold air from ducts.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall
behind the device.
Mounting
The housing base mounts over standard 2 in. x 4 in.
single gang junction box or flush to the wall:
1.
Install the sensor about 5 ft (1.5m) above the floor
in an area with good air circulation at average
humidity and temperature. (See Fig. 1.)
2.
Ensure the device receives adequate airflow.
3.
Wire the device. (See Fig. 4 through 3.)
4.
Ensure proper DIP switch settings.
5.
Apply power to the unit.
6.
Snap the cover into position.
7.
Turn out the 1/16 in. allen screws at the bottom of
the enclosure until the cover cannot be removed.
Fig. 1. Typical sensor location.
5 FEET
(1.5 METERS)
YES
NO
NO
NO
M4823A
