Page 9
Referring to the appropriate Figure, choose a location on the horizontal part
of the duct that is at least 12 inches wide and, if possible, 2 or more feet from
the furnace. This distance allows air turbulence to subside slightly before
entering the humidifier. When such distance is not obtainable, additional
ductwork baffling may be needed to permit adequate humidification.
In the same vicinity, you will also need to locate a cold water pipe and a
120-volt power source for the humidifier transformer that is within 5 feet of
the humidifier. (If the distance is greater, you will need additional wire.)
It is acceptable to wire into the blower circuit, providing the blower is not
multi-speed (see CAUTION, below). The
Model 55
flow-thru humidifier
must be electrically wired to operate only during blower motor operation in
order to eliminate wasting water while the heater is not running. However,
we suggest that you wire the
Model 86
drum-type humidifier to operate
independently from the furnace’s blower. This allows the unit to operate
throughout the full blower cycle, thereby eliminating the lag time involved
in starting the humidifier.
CAUTION:
If the heating system contains a multi-speed
blower motor, it is necessary to isolate the humidifier
transformer. This will prevent premature burnout of the
transformer, caused by the inductive current produced
by the motor during high-speed operation. This can be
accomplished in various ways, such as using a pressure
sensor or fan sail switch to detect blower operation,
and using an independent electrical circuit to power the
humidifier transformer.
CAUTION:
You must comply with all local codes, ordi
-
nances and regulations pertaining to plumbing and elec-
trical wiring.
Installing the Mounting frame
At the selected location, hold the humidifier mounting frame (see
Figure 9 on page 10) on the bottom side of the duct so that the long
sides of the frame are parallel to the length of the duct, and the frame’s
hinged end is toward the heating unit, so that the air flow is in the
direction indicated.
1.