37
VAPOR-LOGIC
®
VERSION 6 INSTALLATION AND OPERATION MANUAL
To start up your humidifier, go to the Start-up Checklist in your humidifier’s
Installation, Operation, and Maintenance manual . The remainder of this page
is for XT humidifiers only .
Note: Connect a maximum of two cylinders to any single dispersion unit .
Connection of more than two cylinders requires separate dispersion . Reference
equipment installation and piping instructions in the XT series humidifier
Installation, Operation and Maintenance manual .
STAGING MULTIPLE XT HUMIDIFIERS
Up to four XT electrode steam humidifiers can be staged to operate in
sequence . In a sequenced application, one control input signal is divided by
user-selectable settings among the humidifiers connected in sequence . See the
Vapor-logic board connection points in Figure 37-1 .
CONTROL INPUT EXAMPLES
Table 37-1:
Control input example for four XT humidifiers in sequence
XT
humidifier
Control input
Result
H-1 (primary) Any valid Vapor-logic
control input
0 to 100% steam output corresponding to 4–20 mA
or 0–10 VDC control signal
H-2 (staged) 4–6 VDC*
0 to 100% steam output scaled across 4–6 VDC range
H-3 (staged) 6–8 VDC*
0 to 100% steam output scaled across 6–8 VDC range
H-4 (staged) 8–10 VDC*
0 to 100% steam output scaled across 8–10 VDC range
* User-selectable, 0–10 VDC in 0 .1 V increments .
Table 37-2:
Control input example for two XT humidifiers in sequence
XT
humidifier
Control input
Result
H-1 (primary) Any valid Vapor-logic
control input
0 to 100% steam output corresponding to 4–20 mA
or 0 to 10 VDC control signal
H-2 (staged) 5–10 VDC*
0 to 100% steam output scaled across 5–10 VDC range
* User-selectable, 0–10 VDC in 0 .1 V increments .
SETTING CONTROL INPUT RANGES
1 . Using the keypad/display or Web interface, go to the Tank setup menu,
then select Input signal, then Demand signal .
2 . Select Yes to enable user input .
3 . Scroll down to select the range for each staged input .
4 . Press the Enter key to confirm selections .
INSTALLATION
Connect
Steam
to RH
connection
points of staged
humidifiers .
Primary XT humidifier (H-1) board
Corner of Vapor-logic board opposite from
Ethernet connection shown
Connect
Ground
( )to Ground
connection
points of staged
humidifiers .
Multi-tank mode
Note: XT and Low-maintenance humidifiers do
not operate in multi-tank mode .
See “Multiple-tank operation” on Page 84 .
Contact DriSteem if you need assistance
staging XT humidifiers . See “Calling DriSteem
Technical Support” on Page 91 .
Step 3 – Startup
FIGURE 37-1: VAPOR-LOGIC BOARD
CONNECTIONS FOR STAGING MULTIPLE
XT HUMIDIFIERS
