Installing The Humidistat - Honeywell HE220 Notice D'installation

HE220, HE260 HUMIDIFIER AND INSTALLATION KIT
IMPORTANT
With low-speed airflow or variable speed sys-
tems it is recommended to run tubing to both the
supply and return ducts.
INSIDE
OF DUCT
1 CONNECT TUBING TO + CONNECTION IF PRESSURE TAP IS
MOUNTED TO SUPPLY DUCT. CONNECT TO – IF PRESSURE
TAP IS MOUNTED TO RETURN DUCT.
Fig. 12. Install tubing.
8. You may cut the tubing to fit the connection length
between the elbow fitting and switch. It is also rec-
ommended to secure the hose to existing structures
to avoid accidental disconnection.

Installing the Humidistat

Installing on Mounting Duct
1. Apply the template to the duct location chosen
for the humidistat. Make sure the template is
level before drilling the holes.
2. Refer to the template (provided with the H8908
Humidistat Installation Instructions) to drill the
control assembly opening and mounting holes
for the H8908.
3. Remove the H8908 case from the base.
4. Position the foam gasket on the H8908 base.
5. Position the base on the duct with the arrow up.
6. Secure the base to the duct using the four
1 in. (25 mm) mounting screws provided with humi-
distat.
7. Connect the low-voltage wires to the leads and
replace the H8908 case. See Fig. 14.
NOTE: For wall mounting instructions, see the H8908
Installation Instructions.
HUMIDISTAT BASE
WIRE SLOT
Fig. 13. Humidistat base and rear view.
69-2516EF—01
1
M27304
REAR OF HUMIDISTAT
HUMIDISTAT WIRES
M20179
WIRING
CAUTION
Hazardous Voltage.
Can cause personal injury or equipment
damage.
Disconnect power supply before installing or
servicing equipment.
IMPORTANT
All wiring must comply with applicable local
code, ordinances and regulations.
Wire the humidifier solenoid valve, pressure switch,
humidistat and transformer. See Fig. 15.
TRANSFORMER
HUMIDIFIER
SOLENOID
VALVE
Fig. 14. Wiring the controls.
NORMALLY OPEN (NO)
TERMINAL 1/4 (6) X 1/32 (1)
THICK QUICK CONNECT
ATTACH
WIRE TO HVAC
ADAPTOR
C TERMINAL
Fig. 15. Close-up of pressure switch wiring.
1. Run the two-strand thermostat wire from the humid-
ifier to the humidistat, and from the humidistat to the
pressure switch and back to complete the wiring
loop to the humidifier. This is illustrated in Fig. 14.
2. Cut lengths of thermostat wire to reach between
components, leaving adequate wire at both ends for
connections.
NOTE: Humidistat and pressure switch can be wired in
any order.
3. At the humidifier, connect the black and white con-
ductors to the two black humidifier wires.
4. At the transformer, connect both black conductors
to the two transformer terminals. Use a wire nut to
connect together the two white conductors.
6
HUMIDISTAT
AIR PRESSURE
ATTACH ADAPTER
WIRE TO HUMIDIFIER
C TERMINAL
COMMON (C) TERMINAL
1/4 (6) X 1/32 (1) THICK
C
1
1
QUICK CONNECT
2 3
2 3
2 3
NO NC
+
PI
SWITCH
M28974
M27398A