Johnson Controls HE-6800 User Manual

HE-6800 Series Humidity Transmitters with

Temperature Sensor Product Bulletin

LIT-12011625

2021-03-26

HE-6800 Series Humidity Transmitters with Temperature Sensor

The HE-6800 Series Humidity Transmitters with
Temperature Sensor provide both humidity and
temperature sensing in room wall-mount applications.The
transmitter offers local warmer/cooler temperature
setpoint adjustment and temporary occupancy override.
The humidity sensor provides RelativeHumidity (RH)
accuracy of ±2% or ±3% RH and measures RH over the
entire range of 0 to 100%.

A warmer/cooler dial is included on certain models for
minor temperature adjustments from the setpoint. All
models feature an occupancy override button that allows
the user to override time-of-day scheduling when the
space is occupied outside of the normal occupied hours
schedule. The transmitter also includes DIP switches to
enable or disable override and Light-Emitting Diode (LED)
functions. In addition, all models feature a user-selectable
0 to 5 VDC or 0 to 10 VDC humidity output switch, and a
power supply selection switch.

The HE-6800 Series Humidity Transmitters include screw
terminal block terminations that provide flexibility for field
wiring. All models include a 6-pin modular jack access port
for connecting accessories to the Zone Bus. This feature
allows a technician to commission or service the controller
via the transmitter.

Table 1: Features and Benefits

Features Benefits

Controller
Configuration DIP
Switch

Power Supply Selection
Switch

User-Selectable
Humidity Output

Occupancy Light­Emitting Diode (LED)
Indicator

Manual Override
Pushbutton (PB)

Warmer/Cooler
Setpoint Dial (Select
Models)

Allows users to adjust the
room comfort and choose
occupancy features that
match the application and
transmitter.

Enables transmitter use
in high input voltage
applications.

Provides either a 0 to 5 VDC
or 0 to 10 VDC output for
compatibility with various
controllers.

Displays the current operating
mode of the controller
(VMA12 and VMA14 Series
only).

Overrides time-of-day
scheduling when the space is
occupied outside of normal
occupied hours schedule.

Allows for minor temperature
adjustments from the
setpoint.

Figure 1: HE-6800 Series Humidity Transmitters with
Temperature Sensor

Product overview

A manual override PB allows the occupant to control the
space temperature. This feature allows the end user to
signal the controller that the space is occupied after hours
or on weekends.

An LED is standard for all models. When used with a
VMA12 or VMA14 Series Controller, the green LED displays
the current operating mode of that controller: On =
Occupied, Off = Unoccupied, andFlashing = Standby.

The controller compatibility DIP switch programs the
HE-6800 Series Humidity Transmitter to:

• disable the PB and LED indicator

• enable the PB with LED indicator

• enable the PB without LED indicator
The DIP switch matches the PB and LED indication with

features recognized by more recent Johnson Controls
controllers. Specifically, the DIP switch allows for matching
controller features to disable the occupancy LED and/or
PB.

The HE-6800 Series Humidity Transmitter also features
a 0 to 10 VDC or 0 to 5 VDC selector DIP switch and a
power supply selection DIP switch. The VDC output
selector switch enables you to change the output for %
RH. The power supply DIP switch enables you to use the

®

HE-68xx-xN00WS

transmitter in high input voltage applications (such as 24
VAC).

The HE-6800 Series Humidity Transmitter has terminal
block wiring connections, and includes a selection of a
1000-ohm nickel, 1000-ohm platinum, or 10,000-ohm
thermistor temperature sensing element. The unit can
be used with Application Specific Controllers (ASCs) or for
universal applications.

Important: The HE-6800 Series Humidity
Transmitter and Temperature Sensor is intended
to provide an input to equipment under normal
operating conditions. Where failure or malfunction
of the transmitter could lead to personal injury or
property damage to the controlled equipment or
other property, additional precautions must be
designed into the control system. Incorporate and
maintain other devices, such as supervisory or alarm
systems or safety or limit controls, intended to warn
of or protect against failure or malfunction of the
transmitter.

HE-6800 Series Humidity Transmitters withTemperature Sensor Product Bulletin2