Install Instructions

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 humidier. When such distance is not obtainable, additional

ductwork bafing may be needed to permit adequate humidication.

In the same vicinity, you will also need to locate a cold water pipe and a

120-volt power source for the humidier transformer that is within 5 feet of

the humidier. (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 ow-thru humidier

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 humidier 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 humidier.

CAUTION: If the heating system contains a multi-speed

blower motor, it is necessary to isolate the humidier

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

humidier 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 humidier 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 ow is in the

direction indicated.