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4_
5.
Peei off the paper from the back of the gasket
and stick the gasket on the return air pbnum.
Remove the humidistat knob by gently pulling
straight ouL Remove the cover screw and the
cover (Fig. 12).
Knob Cover
6_
7.
8_
g_
Screw (Under Knob)
Fig, 12
Mount the humidistat on the return air plenum
with the screws, furnished.
Follow the wiring diagram for the standard or
alternate method of wiring you selecL Use an
approved eUectrical cable containing copper
conductors only. Make all connections inside the
junction boxes and use approved strain relief or
conduit connectors to secure the cable to the
junction boxes per local code,
For maximum safety, the humidifier must be
grounded. Use separate wire or ground to the
grounded 120V electric supply junction box by
using electrical cable with ground wire, and
connecting to the green wire in the humidistat
junction box and the humidifier junction box.
TEST - Replace the cover on the humidifier
conduit box. Replace the cover and knob on
the humidistaL Turn electrical power on at the
fuse box, turn the humidifier switch on (it is on
the left side of the upper case exterior) and turn
humidistat knob to "TEST" position to check for
humidifier blower operation. The furnace may
have to be running for the humidifier blower to
operate depending on electrical wiring method
used. If the humidifier blower does not start,
turn off electricity at the fuse box. Go over each
step in the wiring process. Retrace aii the wiring.
Make sure everything is connected properly.
CAUTmON: Do not leave the humidistat set to the
"TEST" position.
After the humidifier blower operation has been
successfully tested, turn off electricity at the fuse
box and continue with water supply installation.
STANDARD WmRmNGMETHOD
To connect the wiring it is necessary to remove the
cover of the conduit box located on the left side of
the upper case assembly (Fig. 13).
When the humidifier is wired using the standard wiring
method, it operates whether the furnace blower is
running or not, (you wiii hear the humidifier run). It
sounds much like your furnace because a blower is
used to provide maximum humidity from this humidifier.
This air movement sound is normal.
Fig, 13
CAUTmON: Connect the humidifier to 120V, 60 Hz
A.C. electric power only. Turn off the power at the
fuse box before making any line voltage connections.
Foiiow iocai eiectricai codes. Be sure proper grounding
procedure is followed. If in doubt, consult a competent
electrician.
DIRECT LiNE WiRiNG METHOD FOR ANY
FURNACE
The easiest wiring method for the do-it-yourself
installer is direct line wiring. The humidifier will run
whenever the humidistat calls for humidity, whether
the furnace blower is running or not (Fig. 14).
Junction Box
Ground to copper or
galvanized water pipe.
Fig, 14