Install Instructions

H7725A, H7726A, H7735A, H7736A WALL HUMIDITY/ TEMPERATURE SENSORS
31-00447M—01 2
Fig. 2.
2. Wire sensor as shown per Fig. 2.
3. Set the slide selector position (on back of device) to
accommodate either 2-wire or 3-wire outputs. This
selector must be ‘up’ for a voltage output.
4. To change between 0-5V and 0-10V, remove front
cover of device and adjust DIP 1 switch position (on
front of device). Replace cover.
Fig. 3.
5. To install in a junction box, mount device to box
using two screws. To install without junction box,
rotate top and bottom drywall clamps completely
counter-clockwise. Place into drywall cutout, then
turn clamp screws clockwise until they are secured
tightly against the drywall. Sensor must be installed
in the orientation shown.
6. Apply power to sensor.
OPERATION
Press center MENU button to access (1 press) %RH offset
mode. A red LED will blink to indicate %RH offset setting.
The down W arrow and up V arrow can be used to
decrease or increase offset values in 0.1 increments up to
±5%.
DIMENSIONS
Fig. 4. Dimensions in inches [mm].
TROUBLESHOOTING
Table 1. Troubleshooting.
CALIBRATION
Honeywell RH sensors are factory calibrated to NIST
traceable standards. No field calibration is necessary or
recommended. However, to facilitate compliance with
commissioning requirements field calibration offsets are
allowed.
1. Locate calibration instrument and sensor in close
proximity to each other in a controlled environment
free of drafts, people, and equipment to reduce influ-
ence on RH and temperature.
2. Allow both readings to stabilize (10-30 minutes).
Compare reading of sensor to calibration instru-
ment, and calculate difference.
PWR
I
V
GND
+
-
DIP SWITCHES
BUTTONS
DOWN, MENU, UP
MENU
DIP
UP
DN
1
010V
05V
2
N/A
N/A
1
ON
2
Symptom Solution
No output
Check wiring. Ensure power supply
meets requirements.
Temp or RH
reading error
Verify control panel software is
configured for correct output scaling.
Verify accuracy of test instrument.
Observe installation and calibration
guidelines.
Verify unit is securely installed on duct
without excessive air leakage.
Offset calibration only if necessary.
Sensor damage,
contamination,
or long-term
drift
Replace sensor element. Consult
factory for ordering information.