Specifications

7. Re-install the chamber (see Figure 31 for drawing item numbers):
• Using both hands, lift the chamber (Item 6 in drawing) up around the heaters
until the threaded fasteners penetrate the cover flange.
• Hold the chamber in place with one hand and pull the handle (Item 5)
toward you and up onto the threaded fastener on the front bottom of the
chamber. Make sure gasket is centered on chamber flange.
• Push the handle up against the backing nut (Item 9) and run nut (Item 4)
up the threaded fastener so it holds the handle in place.
• Tighten nut (Items 2 and 3) down on the threaded fasteners extending
through the cover flange.
• Tighten nuts (Items 2, 3, and 4) to complete the process of returning
the chamber to its position prior to removal.
• Reconnect the drain hose to the drain valve connection in the back
left corner.
• Reconnect the drain valve electrical plug.
8. Verify electrical connections:
• Verify that all power terminal screws and lugs are tight from power block to heaters.
• Verify that all electrical plugs located under the shroud are completely plugged in (transformer, contactor, drain valve,
and fill valve).
• Check continuity of control relay (smaller top relay) on Model 1150. Replace if shorted.
9. Move the drain valve lever back to the auto position.
10. Turn on the water supply.
11. Turn on the electrical power.
12. Allow the steam chamber to fill with water and initiate a humidity demand
signal (see Figure 32 for drawing item numbers).
• IMPORTANT: Verify that the gasket seal is not leaking prior to
leaving the humidifier unattended.
– If a leak is observed in the left front or side of the gasket, loosen
backing nut (Item 7 in drawing) one turn and tighten fastener nut
(Item 2) down onto the cover flange. Continue this one turn at a time
until the leak stops.
– If a leak is observed in the right front or side of the gasket, loosen backing
nut (Item 8) one turn and tighten fastener nut (Item 3) down onto the cover
flange. Continue this one turn at a time until the leak stops.
– If a leak is observed in the rear of the steam chamber, loosen backing nut (Item 9) two turns and tighten up fastener nut
(Item 4) onto the handle. Continue this two turns at a time until the leak stops. Replace gasket if necessary.
13. If this maintenance occurred at the end of a humidification season, turn the demand for humidity down to the minimum
setting and the humidifier will go into an end-of-season drain after 72 hours.
14. If this maintenance occurred during the humidification season, turn the demand for humidity to the desired set point.
OM-4020
2
3
4
5
6
Chamber cover
9
1
FIGURE 31 – Chamber with
Open Fastener
OM-4019
1
2
3
5
6
4
9
7
8
FIGURE 32 – Steam Chamber
with Closed Fastener
Chamber cover
37