%3*45&&. 7BQPSMPHJD *OTUBMMBUJPO BOE 0QFSBUJPO .BOVBM t 1BHF
Operation
Vapor-logic4 returns to the Home screen on the keypad/display
after a user-defined period of idleness. The Home screen displays
the items most frequently viewed: Actual space RH or dew point,
RH or dew point set point, tank/system output or steam demand,
humidifier mode, and tank activities such as filling skimming,
heating, boiling, and draining.
There is a tank level indicator on the right side of the screen. See
the table below for a description of tank level indicators.
Above the tank level indicator is a tank temperature display
showing actual tank temperature.
Changing mode and set point from the Home screen
Mode and Set point can be changed from the Home screen.
Press the Up or Down arrow key until the Set point or Mode is
highlighted, press Enter, press Up or Down arrow key to change
value, press Enter to confirm. All other parameters shown on the
Home screen are for viewing only and cannot be changed. Go to
the Setup menu to change these items.
Tank activities defined
r 'JMMJOH
Fill valve remains open until water reaches operating
level.
r 4LJNNJOH
Fill valve is open to allow water to flow through the
overflow port, skimming off precipitated minerals. (Potable and
softened water systems only.)
r %SBJOJOH
Tank is draining.
r 'MVTIJOH
Fill and drain valve are open to flush tank. (Potable
and softened water systems only.)
r )FBUJOH
Water in tank is heating.
r #PJMJOH
Water in tank is boiling and there is a demand for
humidity.
r )PU
Water is at boiling temperature and there is no demand for
humidity.
r 8BSN
Water temperature is equal to or greater than 100 °F
(38 °C) and not boiling.
r $PME
Water temperature is less than 100 °F (38 °C).
r &04ESBJO
Humidifier is in end-of-season drain.
r &NQUZ
There is no water in the humidifier and there is no
demand for humidity.
5 I F ) P N F T D S F F O L F Z Q B E E J T Q M B Z
Table 35-1:
Tank-level indicators
Icon
Indicates in:
Potable or softened
water systems
(see Figure 35-2)
DI/RO
water systems
Water level is above the top
probe.
Water is above
low water level.
Water level is between the
mid and top probes.
N/A
Water level is between the
low and mid probes.
N/A
Water level is below
the low probe (heat is
disabled).
Water is below
low water
level (heat is
disabled).
Figure 35-1:
Keypad/display Home screen
Tank-level icons indicate water level at the
water level control probe. See Page 51 for
more information about water level control.
Top probe
Mid probe
Low probe
Figure 35-2:
Water level control for standard
water systems
VLC-OM-030
MAIN
MESSAGE
AL AR M
212˚
F
SET PT
SPACE RH
OUTPUT
59%
Filling
MODE: Auto
35%
34%
TANK A
