• away from steam or water pipes, warm air stacks,
unconditioned areas (no heating and no cooling), or
sources of electrical interference
Note:
The HE-6800 Series Humidity Transmitter is
shock and vibration resistant; however, be careful
not to drop the unit or mount it where it could be
exposed to excessive vibration.
The following ambient operating conditions apply:
• Temperature: 32 to 131°F (0 to 55°C)
• Humidity: 10 to 95% RH, noncondensing; 86°F (30°C)
maximum dew point
To mount the transmitter to the wall:
1. Use a 1/16 in. (1.5 mm) Allen wrench or Johnson
Controls T-4000-119 Allen-Head Adjustment Tool to
loosen the security screw on the top of the unit.
2. Insert a blade screwdriver into the slot next to the
security screw location, and then carefully pry the
top edge of the transmitter assembly away from its
mounting base and remove.
Important:
Do not remove the Printed Circuit
Board (PCB). Removing the PCB voids the
product warranty.
3. Pull out approximately 6 in. (152 mm) of cable from
the wall, and insert the cable through the hole in
the mounting base.
4. Align the mounting base on the wall, and use the
base as a template to mark the location of the two
mounting holes on the surface.
Note:
Make sure the mounting base is
positioned correctly with the security screw
located on the top edge of the base.
5. Secure the mounting base to the wall using the
appropriate mounting hardware (field furnished).
6. Set DIP switches for the desired operation. See the
sections for additional information.
7. Align the tabs on the bottom edge of the mounting
base with the slots on the bottom edge of the
transmitter assembly, and rotate the assembly onto
its mounting base.
Note:
Make sure the terminal block pins align
with the holes in the terminal block.
8. Use a 1/16 in. (1.5 mm) Allen wrench or Johnson
Controls T-4000-119 Allen-Head Adjustment Tool to
tighten the security screw and fasten the network
transmitter assembly to the mounting base.
Wiring
NOTICE
Risk of Property Damage
Do not apply power to the system before checking
all wiring connections. Short circuited or improperly
connected wires may result in permanent damage to
the equipment.
NOTICE
Risque de dégâts matériels
Ne pas mettre le système sous tension avant
d'avoir vérifié tous les raccords de câblage. Des
fils formant un court-circuit ou connectés de façon
incorrecte risquent d'endommager irrémédiablement
l'équipement.
Important:
Use copper conductors only. Make all
wiring connections in accordance with local, national,
and regional regulations.
Keep wires as short as possible to minimize sensor error.
Each 250 ft (76 m) run of 18 AWG wire or 50 ft (15 m) of
24 AWG wire creates 1F° (0.56C°) error for a nickel sensor
or 1.5F° (0.83C°) error for a platinum sensor due to wire
resistance.
To maintain less than 1F° (0.56C°) error for nickel or 1.5F
° (0.83C°) error for platinum, hold the total resistance of
all sensor wiring below 3 ohm. When wiring the HE-6800,
do not run low voltage wiring in the same conduit as
line voltage wiring or other conductors supplying highly
inductive loads.
Internal Wiring Diagrams
Internal wiring diagrams are shown in Figure 1 and Figure
2. Terminal block designations are shown in Figure 3.
The terminals are identified in Table 1. See the
section and Figure 4 for an explanation of
the LED and Pushbutton (PB) modes. Make connections
pairing the following wires:
• sensor (Terminal 1 and Terminal 2)
• setpoint (Terminal 3 and Terminal 4)
• Zone Bus and Common (COM)(Terminals 6 and 7)
Shielding is not required. If used, follow the system
controller’s recommendations for grounding the shield.
Note:
The Manual Override PB does not respond
when the DIP switch positions are all down (LED
mode NO PB, as shown in Figure 2 and Figure 4).
Manual Override is selected for either Terminals 1 and 6 to
short sensor (with DIP switch set for LED Off) or Terminal
HE-6800 Series Humidity Transmitters with Temperature Sensor Installation Guide
2