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Off-season shut-down procedure
1. If the tank is hot, cool it down first. See cool‑down
instructions on facing page.
2. Drain evaporating chamber.
3. Switch off electrical power.
4. Shut off water supply to makeup valve.
5. Examine the evaporating chamber (see Service instructions
below), and clean if necessary.
6. Leave chamber dry, power off, and the water shut‑off valve
closed until the next humidification season.
Service
1. Open the humidifier evaporating chamber. If the tank
is hot, cool it down first. See cool‑down instructions on
facing page.
2. Inspect the tank interior for debris and pitting.
3. Inspect the valve inlet for debris.
4. Check the operation of the float valve and the condition of
the float seat.
5. Check the low water switch to make sure the float slides
freely on the stem.
6. Secure the chamber cover, making sure the cover gasket is
seated and the chamber is sealed.
Note: Although DI models do not require regular tank
cleaning, this service kit contains a new cleanout
plate gasket and nuts. If replacing the gasket, replace
the nuts also, and torque the nuts to 25 to 35 in‑lbs
(2.8 to 4.0 N‑m).
Va p o r s t r e a m , D I W a t e r, s e r v i c e i n s t r u c t i o n s
mc_062608_1425
DRI-STEEM Vaporstream Electric Humidifier, DI Water, Service Kit Manual • Page 5
Start-up
Perform the Annual safety checks in the Inspection and
maintenance section on page 4.
If resuming operation after service, do not leave the humidifier
unattended; allow it to cycle through multiple fill cycles to
verify that all serviced parts are functioning properly. See the
humidifier's Installation, Operation, and Maintenance manual
for start‑up details.
mc_052908_1005
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