Inspection And Maintenance - DriSteem Vapormist Humidi-tech CRUV Manuel

Va p o r m i s t / H u m i d i - t e c h / C R U V, s t a n d a r d w a t e r, s e r v i c e i n s t r u c t i o n s
Cool down humidifier
Before performing service or maintenance procedures, allow
the tank to cool down. Insulated and uninsulated tanks will
have hot surfaces
Note: Fresh make‑up water is used to speed up cooling. Do
not close the manual water supply before cooling down
the humidifier; otherwise the tank could stay hot for
several hours.
1. Verify that there is no call for humidity and that the
aquastat set point (adjusted using the keypad/display Setup
screens) is less than room temperature (default setting
is 40 °F [4 °C]) so that the heaters do not energize while
cooling down the tank.
2. Verify that the tank is in Auto mode so it will fill after
draining begins.
3. Drain the tank:
a. Manually open the drain valve by moving the valve
lever located on the back of the drain valve to the
manual open position. The fill valve will open after
enough water has drained out of the tank.
b. Let the fill water run until the tank is cooled; then shut
off the field‑installed manual supply water shut‑off
valve.
c. Let the tank drain; then manually close the drain valve.
Shut down humidifier
Follow the procedure below before performing service or
maintenance procedures (after the tank has cooled down and
drained):
1. If the humidifier is equipped with a Vapor‑logic3 controller,
use the keypad to change the control mode to Standby.
2. Shut off all electrical power to the humidifier using
the field‑installed fused disconnect, and lock all power
disconnect switches in the OFF position.
3. Close the field‑installed manual water supply shut‑off valve.
Page 4 • DRI-STEEM Vapormist/Humidi-tech/CRUV, Standard Water, Service Kit Manual

Inspection and maintenance

Annually (also recommended when maintenance is performed)
1. All safety devices in the control circuit should be cycled on
and off to verify they are functioning. These include:
• High limit switch
• Airflow proving switch
• Low water level probe. Pull out probe plug; fill valve
should energize.
2. Measure current draw of heaters and verify amp values per
stage by comparing to the wiring diagram located inside
the subpanel cover. This identifies any burned out heaters.
Only qualified electrical personnel should perform this
task.
3. Inspect tank and gaskets for leaks.
Seasonally (or as required, depending on water quality)
Clean the evaporating chamber. See the facing page of this
Service Kit manual for Vapormist instructions; see the back
page for CRUV instructions.
Off-season maintenance
Perform complete inspection and cleaning of the following:
• Heaters
• Probe rods
• Skimmer port and water seal
• Humidifier tank
After cleaning, the humidifier should remain empty until
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humidification is required.
Note: Steps 4 and 7 below apply only to Vapormist humidifiers.
Off-season shut-down procedure
1. If the tank is hot, cool it down first. See cool‑down
instructions at left.
2. Drain evaporating chamber.
3. Switch off electrical power.
4. Remove enclosure.
5. Shut off water supply to makeup valve.
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6. Examine the evaporating chamber (see facing page of this
Service Kit manual), and clean if necessary.
7. Replace enclosure.
8. Leave chamber dry, power off, and the water shut‑off valve
closed until the next humidification season.
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