Specifications

Page 52 • DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual
Drain valve
Always check the drain valve to determine whether it should be
cleaned before installing a new steam cylinder. Typically, the drain
valve port is as dirty as the used steam cylinder.
1. Remove steam cylinder (see “Removing steam cylinder” on
Page 10).
2. Remove the three screws and washers securing drain cup plate
to drain cup (see Figure 52-1).
3. Disconnect 2-pin Molex plug from 24 VAC drain valve coil.
Note locations for reassembly.
4. Remove hose clamp and hose from drain valve body. Take
drain valve assembly to a sink for disassembly and cleaning.
5. Slide black, plastic cap off the drain valve coil. Remove hex nut
on top of coil, and slide coil off actuator (see Figure 52-2).
6. Loosen actuator with a wrench and unscrew from plastic valve
body.
7. Clean exposed plunger, spring, actuator, and plastic drain valve
body with clean water.
8. Reassemble. Tighten actuator 1/8 turn past hand tight.
9. Clean out end of hose. Reconnect it to drain valve body with the
hose clamp.
10. Read note in Figure 52-1, then fit mounting screws with
washers, and insert through drain cup plate.
11. Plug Molex plug into its mating wire harness plug.
Maintenance procedures
Figure 52-2:
Drain valve body
OM-7631
Maintenance
Drain valve body
Plunger
Spring
Actuator
Drain valve coil
Nut
Cap
Figure 52-1:
Drain valve assembly
Drain valve body
Ground plate
Drain cup plate
Drain cup
Insert
OM-7630
Drain valve coil
Verify that
• ground plate is in groove of drain cup,
• insert is in place through ground plate
loop.
Failure to get ground plate and insert solidly
connected to frame will compromise ground
plane safety circuit.
See “Start-up procedure” on Page 48 if returning
humidifier to operation.