Specifications

42
VAPORMIST INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
2. Seasonally (or as required, depending on water quality)
• Remove the evaporating chamber:
– Remove the two fasteners on each side of the cover enclosure (see
Figure 41-1).
– Remove the enclosure. See “Electric shock hazard” Warning at right.
Note: If the humidifier has an SDU mounted directly above it, remove
the SDU cover before removing the humidifier cover.
– If the tank is hot, cool it down first. See “Cool down humidifier” on
Page 41.
– Shut off the water supply.
– Allow the tank to drain completely.
– Shut off the electrical supply.
– Disconnect the fill line at the supply side of the fill valve.
– Disconnect the electrical plugs between the tank components and
the back of the electrical panel (includes: power plug, fill plug, drain
plug, water level control plug, tank temperature sensor plug, and
thermal trip plug).
Important: Disconnect by pulling on plug housing. Do not disconnect
by pulling on cord or wires.
– Disconnect the drain union on the back left corner of the frame.
– Disconnect the steam supply hose from the top of the tank.
– Lift the tank foot above the frame flange, and slide the tank assembly
forward to remove.
• Loosen the four cover bolts and remove the cover assembly from the
tank.
• Clean the tank interior using a putty knife or similar flat instrument.
• Clean and inspect probe rod assembly:
– Unplug the probe plug assembly, and leave ground wire connected
to tank.
– Unscrew probe rod assembly using the probe tool (see Figure 42-1),
and clean plastic probe housing, ensuring that all passageways for
water flow are clear.
– Clean probe rods using steel wool or similar mild abrasive material.
– Inspect composite plastic probe housing. If any signs of cracking,
roughness, or deterioration, replace assembly.
– When sliding probe housing into bracket from which it hangs, orient
housing so neither water flow slot directly faces tank wall at back
end of bracket.
mc_061610_1500
MAINTENANCE
Tap/softened water
Remove and install probe assembly with
supplied probe tool. Attach a 3/8" square
drive to the probe tool.
When installing, torque probe assembly to 120
in-lbs (10 ft-lbs; 13.6 N-m). Probe tools can be
ordered from your DriSteem representative (Part
No. 185101).
Probe tool
OM-7395X
mc_060310_0735-NA
WARNING
Electric shock hazard
Do not remove humidifier electrical
panel cover, heater terminal cover, or
subpanel access panels until electrical
power is disconnected. Improper wiring
or contact with energized circuits
can cause property damage, severe
personal injury, or death as a result of
electric shock and/or fire.
Only qualified electrical personnel
should perform maintenance
procedures.
mc_060310_0840
FIGURE 42-1: PROBE TOOL