Nortec Industries GS Series - Manual (Page 27)

On initial start-up, the solenoid operated fill valve
fills the tank. The water level reaches the backup float
first and then the main float. If the backup and main
floats do not read the same water level during the
operation of the unit, the unit will shut down on a fault.
The unit will continue to fill the unit to the top green
position. The drain pump will then be energized to
drain the water level down to just below the bottom red
position and then the fill valve will energize again to fill
the unit to the middle yellow position. During this time
the software is performing a test on the fill valve and
drain pump.
If a demand signal is present, the unit will then
begin the combustion sequence. As the unit operates,
the fill valve with be pulsed to maintain the water level
between the yellow and green positions. During steam
production the unit will also check if the floats and
drain pump are operational by activating a drain
sequence every 24 hours. (adjustable to time of day)
START UP PROCEDURE
START-UP CHECKLIST
Before the GS humidifier is operated for the first
time, a complete inspection must be performed to
ensure that the installation and all water, gas, steam,
electrical and venting connections to the humidifier
conform to the guidelines in this manual. Complete
the checklist on pages 25 & 26 before commissioning
the unit.
Qualified personnel must correct any deficiencies
with the installation before commissioning takes place.
Prior to starting the humidifier, it is necessary to
ensure that no dirt or dust has accumulated in the
electronics compartment or the burner area. A build
up of dust on the electronics can cause overheating
and early failure of the components. If necessary,
clean the area around thehumidifier to prevent
contaminants from being drawn into the combustion
blowers.
FILLING THE SYSTEM
Before the GS unit will initiate combustion it must
be filled with water and the internal controller must
have completed a self-test to verify that the water fill
system, level controller, and drain pump are
functioning correctly.
· Close the shut-off valve in the gas supply line
· Remove any demand signal to the unit
· Open the shut-off valve in the water supply line
· Switch the humidifier on
· The fill valve will energize and the tank will begin
to fill (fill time is approximately 10 to 30 minutes
depending on unit size). Once the float chamber
has registered low water level, the unit will
perform an internal test of the fill and drain
system as described in the Water Management
section
· At the completion of the test, the float chamber
will indicate middle float position (green LED) and
the unit will go into standby mode until a demand
signal is received
· Proceed to the safety shut-off test
TESTING THE IGNITION SAFETY SHUT-OFF
Test the ignition system safety shut-off in the
following method.
· Close the shut-off valve in the gas supply line
· Set the demand signal to the humidifier to 100%
· Ensure all external controls connected to the
security loop are closed
· Switch the humidifier on
- 23 -
Float Chamber
Presure Equalizer
Aux. Drain
Drain Pump
Dual Fill Valve
Drain Outlet
Vacuum Break Fill Chamber
Main Fill to System
Internal Trap
Figure #24
Plumbing Connections