User Guide

How to Check Your Humidier

for Proper Operation

For preseason startup, or to check your humidier for proper operation (for

example, after it has been serviced), follow this four-step procedure:

1. Turn on the water at the valve which leads directly to the humidier.

2. Make sure the water level is set at 1-3/8 inches. Turn the valve adjustment

screw clockwise () to lower the water level; turn it counterclockwise ()

to raise the water level.

3. Turn the humidistat to its highest setting and observe the humidier evap-

orator pad. If it does not rotate, turn your furnace on by setting the ther-

mostat higher until the furnace blower comes on. This should cause the

humidier evaporator pad to rotate.

NOTE: Wiring the unit to operate independently of or in conjunction with

the furnace blower is up to the discretion of the installer. On installations

where the unit is closely sized (i.e., the cubic footage of the home is at

or near the humidier’s peak volume capacity), independent operation

allows the unit to operate throughout the full blower cycle, thereby elimi-

nating the lag time involved in starting the humidier.

4. IMPORTANT: Reset the thermostat and humidistat to their correct

positions for automatic operation.

How Water Hardness Affects

Scheduled Maintenance

Your humidier will accumulate minerals, such as calcium and lime, after

operating for a short period—a sure sign that the humidier is producing

humidity. The amount of accumulation depends on the hardness of the water

in your area, which means that cleaning frequency will vary from region to

region. You can recognize that cleaning is necessary when the pores in the

evaporator pad begin to become plugged with mineral deposits.

At a minimum, your humidier will need to be cleaned at the end of every

humidifying season (i.e., the months when you heat your home). Depending

on the hardness of your water, mid-season cleaning may also be necessary.

In areas with particularly hard water, installation of a Skuttle Automatic

Flushing Timer (see page 5) will increase the intervals between cleanings.

WARNING: Excessive buildup of minerals is detrimental to the internal

parts of your humidier, as well as to the evaporative process.

NOTE: Under normal heating system conditions, the evaporative pad

should last one-to-two heating seasons before replacement is necessary.

Prolonged exposure to UV germicidal lamps will shorten the pad’s

lifespan.