1. Check that the HE-6800 is mounted in a location
indicative of the space temperature (for example,
away from drafts or sunlight).
2. Verify that the wiring is correct.
3. Check all supply voltage connections. See Figure 1,
Figure 2, or Figure 3, if necessary.
4. Check the settings:
- Verify that any scaling modifications, setpoint
adjustments, and overrides have been saved
and downloaded to the controller.
- Check the override status (Temporary
Occupancy mode vs. Unoccupied mode) at the
controller.
- Check the setpoint settings.
5. Confirm DIP switch positions if:
- the LED remains on or is dim
- the room sensor reading is outside of the
normal range for the space being sensed
Note:
Make sure the DIP switch setting is
correct for the controller used with the HE-6800.
6. Replace the HE-6800 if the troubleshooting
suggestions fail to remedy the problem.
Accessories
Contact the nearest Johnson Controls representative to
order any of the parts listed in Table 4.
Note:
Review the technical specifications of the
accessories prior to their use in an application.
Repair Information
Do not field repair the HE-6800 Series Humidity
Transmitters. As with any electrical device, keep the
air vents clean and free from dust or obstruction.
If an HE-6800 Series Humidity Transmitter fails to
operate within its specifications, replace the unit. For a
replacement transmitter, contact the nearest Johnson
Controls representative.
Table 4: Optional Accessories
Product Code
Number
Description
1
ACC-INSL-0
Wallbox Mounting Pad (10 per Bag)
ACC-INSL-1
Surface Mounting Pad (10 per Bag)
NS-
WALLPLATE-0
Adapts an HE-6800 Series Humidity
Transmitter (3-3/16 x 3-3/16 in. [80 x 80
mm]) to a Standard 3-3/16 x 4-3/4 in.
(80 x 120 mm) Wallbox
T-4000-119
Allen-Head Adjustment Tool (30 per
Bag)
1
These foam pads help prevent drafts from entering the
unit through the wall, and make installation easier when
mounting on an uneven surface.
Technical Specifications
Table 5: HE-6800 Series Humidity Transmitters with Temperature Sensor technical specifications
Specification
Description
Power Requirements
4.5 to 7.5 mA at 14 to 30 VDC and 5K ohm Load, or 18 to 25 mA at 20 to 30 VAC
and 5K ohm Load
Terminations
9-Position Screw Clamp Terminal Block
Wire Size
16 to 24 AWG (1.3 to 0.6 mm Diameter); 18 AWG (1.0 mm Diameter)
Recommended
Temperature Measurement Range
32 to 131°F (0 to 55°C)
Full Range
0 to 100% RH
Humidity
Measurement
Range
Calibrated Range
10 to 90% RH
HE-6800 Series Humidity Transmitters with Temperature Sensor Installation Guide
5