Start Up | 34
Warning: Damaged units or improperly installed units must not be operated. Damaged or
improperly installed units may present a danger to persons and property.
Request – 100%
Humidifying 30 lb/hr
04/30/09 14:30:29
Security loop: Closed
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Start Up Procedure
1 Examine the humidifier and installation for damage and or improper installation.
2 Ensure that the door is in place and secured with its retaining screw.
3 Open the supply water shut off valve.
4 Turn on the mains power using the installed disconnect.
5 Turn the On/Off switch on the front of the humidifier to On.
The LCD display will illuminate and the humidifier will perform a
self-diagnostic sequence during which the LED’s and internal
components will be momentarily activated.
If an error is detected during the self-diagnostic sequence a Fault
will be displayed. See troubleshooting section for information on
diagnosing and correcting faults.
After the system test the humidifier is in normal operation mode.
Note: NHTC display shown. The information on the LCD depends on the configuration of the
NHTC/PC and the actual operating conditions. It may vary from the display shown.
6 If On/Off or a control humidistats have been installed check and adjust the control setpoint
on the control and high limit humidistat (see NORTEC Digital Controls on page 36). If
transducer controls have been installed then adjust the humidity setpoint using the keypad
and display (see Set P on page 53)
7 When either the external humidistat or internal controller generate a demand for humidity
higher than 20% and the security loop is closed the main contactor will engage, the fill valve
will activate (after a delay) and the cylinder will slowly fill with water.
Note: While the cylinder is filling with water there should be no water flowing down the drain. If
water is flowing down the drain it can indicate excessive backpressure or a leaking drain
valve. See General Troubleshooting on page 69.
8 It can take 15 – 20 minutes or longer for a large humidifier to fill, for the water to be heated
up by the submerged electrodes and for steam to be produced.
The green humidifying LED on the
front of the humidifier will light up
and the display will indicated
“Humidifying” and the amount of
steam being produced (NHTC only)
as soon as the electrodes are
submerged and drawing current.
Request – xx%
Idle 0 lb/hr
04/30/09 14:25:22
Security loop: Closed
Menu
Note: If operated on low conductivity water it may take several hours for the NHTC/PC to
reach full output capacity. This is normal. During this time the humidifier will periodically
indicate high water level, not perform any drains and will concentrate the cylinder water.
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