Nortec Steam Humidifiers - Manual (Page 12)

(Life varies from 500 to 2000 operating hours, as
illustrated in Figure #16.)
The RESDELUX control board constantly monitors
unit performance and will shut down the humidifier and
alert the customer to change the cylinder. The yellow
light will flash 4 times in sequence.
HOW TO REMOVE THE STEAM CYLINDER
It is advisable to keep a spare cylinder in stock
throughout the humidification season. When ordering
a replacement steam cylinder, always quote the three
or five digit model number on the label applied to the
cylinder or quote the unit’s serial number, model and
voltage located on the spec label (nameplate).
1. Turn off the water supply to the unit.
2. The used cylinder must be drained completely
before removal. If the water has just been
boiling, allow it to cool before draining. Push the
ON/OFF/DRAIN switch to the MANUAL DRAIN
position. Leave it in this position just long
enough to drain the cylinder (usually not longer
than 3 minutes).
3. When completely drained, push the main
ON/OFF/DRAIN switch back to the OFF position.
4. Once drained, disconnect all power supplies to
the unit.
5. Open the front cover door.
6. Cylinder plugs are attached to the primary
voltage cylinder wires. Remove cylinder plugs
from cylinder pins by pulling vertically.
7. Using a slotted screwdriver, loosen the steam
hose clamp(s) and pull the steam hose off the
cylinder vertically.
8. The cylinder is now ready to be lifted out of the
unit. CAUTION: Cylinder and any undrained
water might still be HOT.
9. Remove the used cylinder as previously
described. NORTEC does not recommend the
use of any acid solutions to clean the used
cylinder. Always replace a used cylinder.
HOW TO INSTALL THE REPLACEMENT CYLINDER
1. Reverse procedure should be followed to install
a new cylinder. Main power supply to the unit
must be disconnected until the cylinder is
completely installed and reconnected.
2. The cylinder plug wires are color-coded in
accordance with colored dots beside the
electrode pins on the top of the cylinder.
- 9 -
Grains
of
Hardness
Capacity Adjustment Setting
CaCO
mg/L
(ppm)
3
Cylinder Life Expectancy
(average operating hours)
30
20
10
5
100% 50% 25%
500
400
200
100
500 1000 2000 4000 8000
Figure #16
Water Conditions vs. Cylinder Life
Figure #17
Cylinder Replacement
Plunger Spring
Holding Coil
Sleeve
Male Slip-on
ConnectionTabs
Actuator
Figure #18
Reassembly Of The Drain Valve And Fill Valve