HM700A1000
Drain Valve Cleaning
Always clean the drain valve before installing a new cylinder.
Scale from the spent cylinder may have fallen into the drain
valve and could prevent its proper operation. To properly clean
the drain valve it must be removed and disassembled.
1.
Disconnect spade terminals from the drain valve.
2.
Remove the two screws holding the valve to the drain
pan.
3.
Squeeze the tabs of the spring clamp holding the hose
to the drain valve and slide it up the hose. Pull hose
from drain valve. Lift the drain valve from the drain pan.
4.
Unsnap red coil cap on solenoid and remove the sole-
noid from the valve.
5.
Loosen brass nut holding actuator to plastic housing
with a wrench and disassemble actuator.
6.
Clean actuator components and valve housing (inlet
port, outlet port, and cylinder port). Put new o-ring that
was supplied with new cylinder into valve.
7.
Reassemble actuator making sure tapered end of
spring is oriented as shown in Fig. 25. Tighten brass nut
1/4 turn past hand tight.
8.
Clean out end of hose and reattach to valve. Slide hose
clamp back in place and place valve into drain pan.
9.
Secure valve with 2 screws to drain pan.
Fig. 24. Drain valve.
Fig. 25. Drain valve actuator assembly.
Installing the New Cylinder
CAUTION
Make sure the new cylinder is a HM700ACYL2. Use
of any other model or remanufactured cylinders
will void the HM700 warranty.
1.
Insert cylinder into drain valve. Tilt cylinder forward and
fit end of steam hose to steam outlet. Tip cylinder back
into place.
2.
Tighten hose clamp being careful not to over tighten and
crush the plastic cylinder steam outlet.
3.
Attach color-coded cylinder plugs to the corresponding
color-coded cylinder pin. Push down completely.
Connect high water sensor plug. Spring-loaded plugs
should fit snuggly onto the cylinder pin. Replace if they
are loose or damaged.
4.
Re-fasten tie strap.
5.
Replace the humidifier cover and secure with two
screws.
6.
Turn on power to humidifier with the external
disconnect.
7.
Open supply water shut off valve.
8.
Turn the humidifier On/Off /Drain switch to On.
Extended Shutdown
Should it be required to disconnect power to the humidifier for
a period of extended shut-down, always drain the cylinder first.
1.
Switch the On/Off/Drain Switch to the Drain position.
2.
Wait until the humidifier is completely drained (usually
takes less than 10 minutes).
3.
Turn the On/Off /Drain switch to the off position.
4.
Shut off power to the humidifier with the external
disconnect.
5.
Close the supply water shut-off valve.
NOTE: As long as the HM700 is powered, it will
automatically drain the cylinder when there has
not been a call for humidity for an extended
period of time. This feature will reduce or prevent
the possibility of corrosion of the electrodes and
the accumulation of algae and bacteria growing
in the cylinder. The cylinder will remain empty
until there is a call for humidity at which time the
fill valve will open and refill the cylinder. The unit
will go through its normal process for optimum
operation.
STARTING AFTER EXTENDED SHUTDOWN
1.
Check to see the humidifier has not been damaged and
the installation has not been altered. See
n
Start Up
Procedure
o
on page 14.
2.
Turn on the power to the humidifier with the external
disconnect.
3.
Turn the On/Off/ Drain switch to the Drain position.
4.
Wait until there is no water flowing to drain. It usually
takes less than 10 minutes.
5.
Follow the start up procedure on page 14.
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