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HE360 HUMIDIFIER AND INSTALLATION KIT
69-2631ES—03 10
Installing the Pressure Switch
IMPORTANT
Do not install the switch in an area where temperature exceeds rating of
-40 °F to 190 °F (-40 °C to 88 °C).
1. Disconnect power from the humidi-
fier before installing.
2. Mount the switch vertically with
pressure connectors facing down,
using provided self-tapping screws
to secure the switch to the duct.
3. Cut 3/4-in. diameter holes in the
supply and return ducts within 10
feet of the switch to ensure the pro-
vided tubing reaches the pressure
tap elbows. See Fig. 9.
4. Insert the black rubber gaskets into
the duct holes.
5. Connect the tubing to the tubing fit-
ting elbows and insert the tubing
fitting elbows into the black rubber
gaskets in each duct.
6. Connect the other end of the tubing
to the applicable pressure connec-
tion on the switch.
a. Connect supply duct tubing to
the + connection.
b. Connect return duct tubing to
the – connection
7. You may cut the tubing to fit the
connection length between the
elbow fitting and switch. It is also
recommended to secure the hose
to existing structures to avoid acci-
dental disconnection.
Fig. 9. Mounting the pressure switch.
Fig. 10. Install tubing.
M27303
A
B
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
M27304
INSIDE
OF DUCT
CONNECT TUBING TO + CONNECTION IF PRESSURE TAP IS
MOUNTED TO SUPPLY DUCT. CONNECT TO – IF PRESSURE
TAP IS MOUNTED TO RETURN DUCT.
1
1
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