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Honeywell HE220 Installation Manual page 5

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IMPORTANT
To prevent debris from clogging the solenoid in-
line filter, be sure to install the saddle valve han-
dle pointing toward the ceiling.
BRASS COMPRESSION NUT
Fig. 8. Installing feed tubing.
4. Use 1/4-in. (6mm) OD tubing and connect the sad-
dle valve to the inlet side of the solenoid valve on
the humidifier (See Fig. 9).
5. Repeat step 2, a - d for saddle valve fitting.
NOTE: Cut tubing to correct length so the tubing termi-
nates at the drain.
Fig. 9. Installing the drain tubing.
Air Pressure Switch Installation
IMPORTANT
Do not install the switch in an area where tem-
perature exceeds rating of -40F to 190F (-40C to
88C)
1. Disconnect power from the humidifier before install-
ing.
2. Mount the switch vertically with pressure connec-
tors facing down, using provided self-tapping
screws to secure the switch to the duct.
IMPORTANT
Calibration accuracy requires that the switch be
mounted vertically (as pictured in Fig. 10).
PLASTIC
COMPRESSION RING
BRASS INSERT
M20176
M20177
HE220, HE260 HUMIDIFIER INSTALLATION KIT
Fig. 10. Pressure switch—oriented vertically.
3. The return duct is recommended, however the
switch can also be mounted to the supply duct.
A
SUPPLY DUCT INSTALL - AIR LINE ONLY TO TAP A,
CONNECTED TO THE + PORT ON THE AIR FLOW SWITCH
RETURN DUCT INSTALL - AIR LINE ONLY TO TAP B,
CONNECTED TO THE – PORT ON THE AIR FLOW SWITCH
SUPPLY/RETURN DUCT INSTALL - AIR LINE CONNECTED
TO BOTH THE + AND – PORTS ON THE AIR FLOW SWITCH
Fig. 11. Mounting the pressure switch.
4. Cut a 3/4-in. diameter hole in the duct within 10 feet
of the switch to ensure the provided tubing reaches
the pressure tap elbow.
5. Insert the black rubber gasket into the duct hole.
6. Connect the tubing to the tubing fitting elbow and
insert the tubing fitting elbow into the black rubber
gasket.
7. Connect the other end of the tubing to the applica-
ble pressure connection on the switch.
e. Black connection if installed on the supply
f.
Grey connection if installed on the return
g. Both grey and black if installed on both
5
M27300
B
M27303
69-2518—03

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