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CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Tap/softened water
MAINTENANCE
Before performing service or maintenance procedures and before shutting off
electrical power, cool down the humidifi er according to the instructions below
for your controller type. Insulated and uninsulated tanks will have hot sur fac es.
Note: Fresh make-up water is used to speed up cooling. Do not close the
manual water supply before cooling down the humidifi er; otherwise the
tank could stay hot for several hours.
COOL DOWN HUMIDIFIER (LW SERIES CONTROLLER)
1. 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.
2. Let the fill water run until the tank is cooled; then shut off the field-installed
manual supply water shut-off valve.
3. Let the tank drain; then manually close the drain valve.
COOL DOWN HUMIDIFIER (VAPOR-LOGIC CONTROLLER)
• 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.
• Models with a standard drain valve:
– Manually open the drain valve by moving the valve lever located on
the back of the drain valve to the manual open position. The fi ll valve
eventually opens.
– Let the fi ll water run until the tank is cooled, then shut off the fi eld-
installed manual supply water shut-off valve.
– Let the tank drain, then manually close the drain valve.
• Models with optional drain valves:
– For drain valves without the manual open lever, use the keypad to
perform the cool down process.
– Go to the control modes screen and select Manual Drain.
– Allow approximately half the water to drain out of the tank.
– In the Control Modes screen select Auto; the fi ll valve opens and the
humidifi er cools down.
– When the fi ll valve closes, select Manual Drain in the Control Modes
screen and let the tank drain dry. The humidifi er should be cool enough
to work on.
– For more information about using the keypad, see the
Vapor-logic
Installation and Operation Manual.
WARNING
Hot surface and hot water hazard
Do not touch the tank or drain piping
until the unit has had suffi cient time to
cool, or serious injury can occur.
Opening the drain valve when the
tank is hot can discharge water with a
temperature up to 212 °F (100 °C) into
the plumbing system. This can cause
damage to the plumbing system if the
humidifi er is not properly connected
to a water tempering device such as a
DriSteem Drane-kooler
™
.
mc_060110_1640
Shut down humidifier
Follow the procedure below before performing
service or maintenance procedures (after the
tank has cooled down and drained):
•
If the humidifi er is equipped with a Vapor-
logic controller, use the keypad to change
the control mode to Standby.
•
Shut off all electrical power to the humidifi er
using the fi eld-installed fused disconnect, and
lock all power disconnect switches in the
OFF position.
•
Close the fi eld-installed manual water supply
shut-off valve.
