Unit installation

Humidifier

Approximately 30 seconds after the contactor pulls in, the fill valve coil should energize. There is also

a visible fill relay on the printed circuit board. It is the one located farthest from the C.T. core. The

points on this relay must be touching in order for the fill valve coil to be energized. If the points do not

touch after the built-in time delay, the sensor input may be interfering. To confirm, remove the black

and red sensor wires from terminals 6 and 10 on the PC board. Wait 30 seconds and, if the fill relay

points do not touch, replace the sensor. If they still do not touch, the basic PC board may be faulty. To

confirm, disconnect the red wire from terminal 18 and touch it to terminal 14. If the fill valve coil acti-

vates, the basic PC board should be replaced. If it still does not activate, the fill valve coil should be

replaced. After the necessary components have been changed, water will start filling the cylinder and

begin to submerge the electrodes. Because of the high voltage across the electrodes, the water can now

conduct electricity.

Red “Change Cylinder” light on—Water at top of cylinder:

This is a common occurrence on startup. See 10.0 - Startup and 11.0 - Operation.

Water remains at high level and won't concentrate:

This is normal on cold startup and can be accelerated by adding a maximum of 1/2 tsp. of dissolved

salt to the cylinder on fill cycle through the plastic fill cup. See A.1.4 - Low Water Conductivity.

If the unit has been operating extensively, observe for normal fill-boil-fill-boil cycle; no drainage

should occur. If drainage occurs, check for leaking drain valve or back pressure.

Unit drains continually:

May be caused by foaming and/or back pressure, or leaking drain valve.

If cylinder is almost empty, check for magnetic pull on drain solenoid indicating miswiring. If there is

no pull, drain actuator is blocked open; remove, disassemble and clean.

If drain is occurring through activated drain valve, valve is miswired or electronics are faulty; consult

factory.

If drain is occurring through the overflow on the fill cup, this is due to abnormal restriction on the

steam line and back pressure forcing water out of the cylinder so water cannot concentrate and level

remains high. Review installation of steam line to ensure there are no blockages or excessive static

pressure in the air system.