DriSteem Vapor-Logic Guía de instalación descargar pdf (Pagina 46)

TROUBLE-SHOOTING GUIDE

PROBLEM POSSIBLE CAUSE RECOMMENDED ACTION

HUMIDITY BELOW

DESIRED LEVEL

Unit operating but fails to meet

required humidity output

Unit undersized; replace with a larger unit or add

additional humidifier.

Skimmer rate is too high.

If drain valve will not close fully, determine the cause

and clean, repair or replace as needed.

If drain pipe water seal is allowing steam to go down

the drain, repair as needed.

If there is an improper water seal height, increase to

recommended height. (See humidifier O&M manual)

If there is excessive internal steam pressure,

determine the cause of the high pressure (i.e.: high

duct static pressure, undersized orifices in dispersion

tubes, water, or crushed vapor hose, etc.) and repair

as required.

Replace leaking gasket or vapor hose.

Recalibrate if controls are out of calibration.

If fill valve is stuck open, repair or replace.

If zone valve will not open, repair or replace.

No call for humidity from

humidistat or control and high

limit humidity transmitters

Low or no signal strength from humidistat.

Check for proper wiring.

Check humidity transmitters. (4-20 mA output)

Adjust set point if VAPOR-LOGIC set point is too low.

Heating elements not operating If heaters are burned out, refer to previous section on

HEATER BURNOUT.

Humidistat calling for humidity (out of calibration)

Check for control voltage if limit controls (air flow

proving switch, zone valves, etc.) are not allowing unit

to operate.

Check fuses and replace if they are blown.

Check if the (optional) heater overtemperature has

been tripped. Reset if necessary.

Excessive outside air volume Verify proper operation of fans, dampers, VAV

systems, etc.

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DriSteem Vapor-Logic Guía de instalación Pagina 46