Nortec Humidifier RESDELUX User Manual

RESDELUX  
Steam Humidifiers  
Installation, Operation,  
Maintenance and  
Troubleshooting Guide  
IMPORTANT: READ AND SAVE THESE INSTRUCTIONS. This  
guide to be left with equipment owner.  
1505691-B  
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HUMIDIFIER CONFIGURATION  
INSTALLATION  
To avoid any danger, never operate the  
humidifier with a door off.  
RECEIVING & UNPACKING EQUIPMENT  
1.  
Check packing slip to ensure ALL material has  
been delivered.  
To open the door, use the key to unlock, lift door  
up slightly and pull door forward.  
2.  
All material shortages are to be reported to  
NORTEC within 48 hours from receipt of goods.  
NORTEC assumes no responsibility for any  
material shortages beyond this period.  
LOCATION & MOUNTING  
HUMIDIFIERS  
RESDELUX Series humidifiers are designed to  
mount on a suitable wall or vertical surface. Do not sit  
on the floor due to additional clearances required for  
plumbing, electrical, and control access holes. The  
clearance dimensions shown in this manual are for  
reference only and are the minimum required for  
maintenance of the humidifier. Local and National  
Codes should be consulted prior to final location and  
installation of the humidifier. Walter Meier (NORTEC)  
does not accept responsibility for installation code  
violations.  
3.  
4.  
Inspect shipping boxes for damage and note on  
shipping waybill accordingly.  
After unpacking, inspect equipment for damage  
and if damage is found, notify the shipper  
promptly.  
5.  
All NORTEC products are shipped on an F.O.B.  
factory basis. Any and all damage, breakage or  
loss claims are to be made directly to the  
shipping company.  
1.  
Location of the humidifier should be below and  
as close as possible to the steam distributor  
location or blower pack. Net output will be  
reduced as a result of heat loss through long  
steam hose.  
PRE-INSTALLATION CHECKPOINT  
1.  
2.  
Ensure that available voltage and phase  
corresponds with humidifier voltage and phase  
as indicated on humidifier’s nameplate label.  
2.  
See Figure #2 for front clearance requirements  
for access during installation, maintenance and  
troubleshooting.  
Ensure that the dedicated external disconnect  
switch is of sufficient size to handle the rated  
amps as indicated on the nameplate label. Refer  
to local codes.  
Figure #2  
Clearance Requirements  
3.  
Report any discrepancy immediately.  
Wall  
Figure #1  
RESDELUX Series Humidifier  
Condensate  
Return  
Steam  
Outlet  
NOTE: Localandnational  
codesmaydeviate. Please  
Min. 36"  
Frontal  
Clearance  
consultapplicablecodes  
forclearancerequirements  
3.  
4.  
Where possible, mount humidifier at a height  
convenient for servicing.  
Nameplate  
Label  
To mount the humidifier use two #8 screws, 2”  
long, and secure into a standard 2”X4” wood  
stud or equivalent structure.  
PowerAnd  
Control  
Wiring  
Drain  
Water  
Supply  
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Figure #3  
Wall Mounting Detail  
nozzle will have to be mounted from the inside of  
the duct. Remove internal insulation material if  
necessary. (See Figure #5).  
Wall  
Figure #5  
Steam Distribution Nozzle Mounting Arrangement  
0.6”  
(1.6cm)  
FastenHumidifierTo  
WallUsingScrews2long  
(2)suppliedbyother  
12.1(30.7cm)  
5. Make sure humidifier is level.  
6. DO NOT mount humidifier on hot surfaces.  
3. When the steam distribution nozzle is located  
above the top surface of the humidifier: The  
nozzle must be at least 1 ft (305 mm) above the  
top surface of the humidifier. Locate the steam  
hose so that it slopes at an angle of at least 20°  
(Figure #6).  
7. DO NOT mount humidifiers in an area where  
freezing may occur.  
8. DO NOT mount humidifiers on a vibrating surface.  
10. DO NOT mount the humidifier to a duct or plenum.  
STEAM DISTRIBUTOR NOZZLE (in duct location)  
Figure #6  
Steam Plumbing Arrangement Above Humidifier  
min. 2º  
min. 10º  
1. When installing the steam distribution nozzle of  
the RESDELUX humidifier it must be located in  
the supply duct at least 4 feet from any  
.
mm)  
Rmin  
obstructions such as bends, fans, filters, etc. to  
prevent wetting (see figure #4).  
(300  
min. 10º  
12”  
Figure #4  
Steam Distributor Nozzle in Duct Location  
mm)  
(150  
min  
6”  
Nortec  
Humidifier  
To be 2” (50mm) longer  
then duct static pressure  
or minimum.  
NHB, NHP, NHMC,  
RESDELUX ONLY  
Min. 12”  
4. Steam distribution nozzle below top surface of  
humidifier: The steam hose must first rise to the  
minimum height of 1 ft (305 mm) above the top  
surface of the humidifier and thereafter slope a  
minimum 5° in a uniform manner toward the  
nozzle. A separate drain line must be provided for  
condensate that collects at the steam distribution  
nozzle (Figure #7).  
2. The steam distribution nozzle can be mounted in  
the bottom wall or on the vertical walls of the duct.  
If the duct wall is more than 3/4" (20 mm) thick, the  
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Figure #7  
Steam Plumbing Arrangement Below Humidifier  
3.  
4.  
Avoid condensate traps in the hose, see Figure  
#8.  
Use wall clips (p/n 158-5001) to support the  
steam and condensate hoses and maintain 1”  
clearance from the wall. The connection can also  
be made with ¾” copper pipe with 1” thermal  
insulation rated for 215°F (101°C).  
min. 10º  
min. 2º  
CONDENSATE HOSE (supplied)  
min. 10º  
Nortec Humidifiers  
All Models  
Under normal circumstances, when the steam  
distribution nozzle is above the top surface of the  
humidifier, the condensate hose is routed back to the  
top of the humidifier and fed through the opening  
provided to the fill cup. Cut the ends diagonally and  
simply insert ½" in the appropriate hole in the top of  
the humidifier. Install a 3/8” copper tubing trap at the  
lowest point in the condensate system. Connect to the  
hose with a clamp Figure #6.  
mm)  
(150  
min  
6”  
To be 2” (50mm) longer  
then duct static pressure  
or minimum.  
min. 2º  
min. 10º  
BLOWER PACK CONNECTION  
min. 20 %  
Nortec Humidifiers  
All Models  
The RESDELUX humidifier can be purchased with  
an optional blower pack for direct room humidification.  
The blower pack is field installed on the RESDELUX  
humidifier cabinet or located remote from the  
RESDELUX humidifier.  
min. 20 %  
mm)  
(150  
min  
6”  
The blower pack is powered directly from the  
RESDELUX control board. It cannot be powered  
separately.  
mm)  
(150  
min  
6”  
On a call for humidity, blower fans are powered  
and remain powered for about two minutes after steam  
production is interrupted.  
STEAM HOSE INSTALLATION  
1.  
2.  
The length of the steam hose must not exceed 4’  
(1.2m).  
Cabinet Mounting of the Blower Pack  
The RESDELUX blower pack comes with a basic  
hardware kit. The kit contains all the hardware  
required to cabinet mount the blower pack.  
It must not be restricted in any way (i.e. - a kink  
resulting from a short radius bend).  
Figure #8  
Steam Hose Routing  
NOTE: Mounting of the blower pack must be  
performed before the RESDELUX humidifier is  
installed and wired.  
Avoid Water Traps  
Avoid kinks  
1.  
2.  
3.  
Remove the RESDELUX humidifier and blower  
pack from their shipping boxes.  
Place the RESDELUX humidifier upright on a flat  
surface.  
Remove the 7/8” knockout on the top of the  
RESDELUX humidifier. There are two  
knockouts, select the one closest to the large  
opening.  
Proper  
Slope  
Gentle  
Sweeping  
Turns  
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4. Put the power leads from the blower pack through  
this opening as you position the blower pack on  
top of the RESDELUX humidifier  
switched off at the electrical panel, or that it is  
unplugged (RESDELUX/C).  
3. Find a suitable location for mounting the remote  
blower pack. The surface should be flat with  
adequate clearances for the top, side, and front:  
5. Push the blower pack forward until the locating  
tabs on the bottom of the blower pack with slots in  
the top of the RESDELUX push forward to engage.  
Table #1  
Clearances of Remote Mounted Blower Pack  
6. Use two Phillips screws with star washers in the  
Blower Pack screw support tabs to secure to the  
RESDELUX unit.  
Minimum Ceiling Minimum Side Minimum frontal  
Clearance  
inches (cm)  
Clearance  
inches (cm)  
Clearance  
inches (cm)  
7. Remove the front door and service cover from the  
RESDELUX humidifier.  
18” (45)  
18” (45)  
60” (150)  
8. Connect the power leads for the blower pack to  
terminal P7 on the RESDELUX control board  
located next to the capacity adjustment  
potentiometer.  
4. Minimum slope of steam hose is 20°. Steam lines  
longer than 5 ft require condensate trap installation  
(see Figure #6).  
9. Use the short piece of steam hose and hose  
clamps supplied with the basic hardware kit to  
connect the steam cylinder to the blower pack  
steam distributor.  
5. RESDELUX blower pack has two teardrop (or  
keyhole) openings on the back of the cabinet for  
mounting purposes. They are located 8 ¼” apart,  
and 1” from the top of the blower pack cabinet.  
Installation of the blower pack is now complete.  
For instructions on mounting the RESDELUX  
humidifier please see the location and mounting  
section.  
6. Measure the screw locations and use two #8  
screws, 2” long. The screws should be anchored in  
a standard 2” x 4” wood stud or equivalent to  
ensure adequate support of the blower pack and  
connecting steam hose.  
Figure #9  
Blower Pack Cabinet Assembly  
7. Remove the 7/8” knockout on the top of the  
RESDELUX humidifier and insert the closed finger  
grommet into the opening.  
8. Put the power leads from the blower pack through  
this opening. If the wire leads are not long enough  
field splice the additional requirement, or get a wire  
extension kit (P/N 1502326) available from  
NORTEC.  
Figure #10  
Steam Absorption Distances  
Steam absorption space size in inches for ambient humidity  
30% RH, room temperature and selected steam outputs of  
RESDELUX humidifier.  
H
W
Remote Mounting of the Blower Pack  
F
1. The remote mounted blower pack should be  
located at least 7’ off the floor to prevent the  
discharged steam from coming in contact with  
pedestrian traffic or any obstruction.  
0”  
2. When installing the remote blower pack, ensure  
the primary voltage to the RESDELUX has been  
Steam Output  
4 lbs/hr  
F
W
H
36"  
42"  
48"  
12"  
16"  
18"  
12"  
18"  
18"  
6 lbs/hr  
8 lbs/hr  
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NOTE: Improper wiring could damage the blower  
pack or RESDELUX PCB.  
more corrosive. Some hardware changes may  
be required, at the time of order or in the field.  
9.  
Remove the front door and service cover from  
the RESDELUX humidifier.  
3.  
4.  
DO NOT supply hot water to the humidifier.  
Minerals will adhere more easily to surfaces and  
the fill valve’s small flow regulating orifice could  
become plugged.  
10. Connect the power leads for the blower pack to  
terminal P7 on the RESDELUX control board  
located next to the capacity adjustment  
potentiometer.  
ALWAYS supply and install a shut off valve in  
the water supply line dedicated to the humidifier  
to facilitate servicing. Use ½" O.D. copper to  
within 4 feet of the humidifier. Reduce copper to  
1/4" O.D. and connect to the factory-supplied  
1/4" olive compression fitting under the  
humidifier.  
11. Replace the electrical service cover and front  
door.  
Once the power is restored the RESDELUX  
humidifier is ready for service.  
Figure #12  
Drain Pump (if necessary)  
PLUMBING  
For humidifiers installed in some cities including  
the City of Los Angeles:  
Humidifier  
A city-approved spring-loaded double ball CHECK  
VALVE must be supplied and installed by contractor  
on each of the potable water inlets to each humidifier.  
Recommended valve manufacturer: Watts Regulator  
phone number 508-688-1811. Size: Depending on  
supply line 1/4", 3/8" or ½" NPT inlet and outlet.  
Model: #7.  
Drain Canal  
Drain Line  
Line  
All water supply and drain line connections should  
be installed in accordance with local plumbing codes.  
142-9527  
Pump  
Floor  
Surface  
WATER SUPPLY LINE  
DRAIN LINE  
1.  
2.  
The Humidifier is intended to operate on potable  
(cold) tap water.  
1.  
The humidifier is equipped with a 7/8" O.D.  
unthreaded horizontal drain outlet from the drain  
canal on the bottom of the humidifier. A  
field-supplied funnel or reducer(see Figure #11)  
is recommended. It will prevent backup in the  
drain pan and in the cylinder due to partially  
blocked or poorly installed drain lines.  
If the raw water is very hard, NORTEC can  
provide longer cylinder life on softened water;  
however, softened water is more conductive and  
Figure #11  
Drain Connection  
2.  
3.  
The drain line should not drain into a sink used  
frequently by personnel, or where plumbing  
codes prohibit it. Route to a floor drain or  
equivalent for safety reasons, since drain water  
from humidifier can be very hot.  
NOTE: Steam hose should not reach bottom of the funnel.  
Keep drain lines as short as possible. Keep  
drain lines sloped down, not level and not up  
since low spots in drain lines will accumulate  
sediment and cause backup. The drain line  
should be 7/8" O.D. copper pipe or larger. Do  
not use plastic pipe for drain lines.  
ClampAnd  
DrainCanal  
7/8"I.D. Hose  
AirGap  
FactorySupplied  
7/8" O.D. Copper  
PipeOr7/8"I.D.  
Copper Reducer To  
ServeAsFunnel  
Drain(ByOthers)  
(Min. 11/4OD)  
Hose(NotSupplied)  
4.  
Each drain line from these humidifiers must be  
routed without dips or sags to terminate above  
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current) across terminals 1 and 2 on the low voltage  
control terminal.  
Control Installation  
1.  
Wall Humidistat: Mount any wall humidistat  
Caution: This is the “common” wire from the  
transformer that is connected to the ground. It will  
short on/off control loop if it touches a grounded  
metal surface.  
(control or high limit) over the standard electrical  
box at a height similar to a typical thermostat.  
Any wall humidistat should be in a location  
representative of overall space being humidified  
and not in the path of the blower pack or air  
supply grille. Do not mount on an outside wall  
where temperature fluctuation can affect the  
control response.  
A - Wall or Duct Mounted Control On/Off  
Humidistat: Wired to close when there is a drop in  
humidity and open when the setpoint is reached. Set  
to desired % RH.  
2.  
3.  
Duct Humidistat: Mount the duct humidistat In a  
location representative of overall air humidity,  
(usually the return duct). Do not mount it directly  
in front of the steam distributor or in a turbulent  
or mixing zone. Mount it where the air’s humidity  
and temperature are uniform and representative  
of spaces being humidified.  
B - Duct Mounted Safety High Limit On/Off  
Humidistat (if used): Wired to close when there is a  
drop in humidity and open when the safety setpoint is  
reached. Set to approximately 85% RH as a safety to  
help prevent saturation and wetting in the duct (not  
required when using blower pack kit).  
C - Duct Mounted Safety Air-Proving On/Off  
Switch (if used): Wired to close when sensing air flow  
and open when no air flow is sensed. Used as a  
safety to prevent saturation of the duct when there is  
no air flow (not required when using blower pack kit).  
High Limit Duct Stat: Mount the duct high limit  
humidistat downstream of the steam distributors  
far enough that, under normal humidity and air  
flow conditions, steam will have been fully  
absorbed (typically at least 10 feet). It must be  
located to sense high humidity only when  
uniform and representative air is over-humidified  
or approaching saturation.  
Figure #14  
External Wiring Of On/Off Controls  
4.  
5.  
Duct Air Proving Switch: Mount the duct  
air-proving switch so that it is able to sense air  
flow or lack of it. Wire it to close when air flow is  
sensed and open when air flow fails.  
A
B
C
Check operation of all on/off controls before  
starting the humidifier.  
Note: For wiring interface with a fan, see wiring  
diagram provided on page 13. Steam humidifier will  
turn on fan when increase in humidity is required.  
External  
1
2
Internal  
OPERATION  
1.  
NORTEC offers various versions of A, B and C  
to suit each application. In general, A is  
essential for in space applications, C is essential  
for induct applications, whereas B is highly  
recommended in ducted applications.  
INTRODUCTION  
The NORTEC RESDELUX humidifier is designed  
to provide clean steam humidification at an economical  
price. It utilizes NORTEC’s patented electronic  
Auto-Adaptive internal control system for high  
efficiency and low waste of water and electricity.  
2.  
3.  
Field wiring from the humidistat to the humidifier  
and between devices should be a minimum of 18  
AWG and kept as short as possible.  
RESDELUX OPERATION  
Low voltage control terminal strips are provided  
in the electrical compartment. Internal sides are  
factory wired. External sides are for field wiring.  
(See Figure #14).  
When the humidifier is first turned on, the  
controller starts with a self test procedure, which takes  
about 10 seconds. The test consists of activating for a  
short time the drain valve, fill valve, and power relays.  
The sound of the working solenoids is an indication of  
4.  
Each humidifier is supplied with a wiring diagram  
inside.  
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valves operation. Green and yellow lights flash during  
this time.  
A flashing yellow light indicates a fault of the  
humidifier and the controller shuts off the humidifier.  
Please refer to troubleshooting section.  
If there is no call for humidity, the humidifier is  
standing by and green light flashes. When control loop  
is closed, the green light is steady on and the  
humidifier starts its operation. The controller waits 10  
seconds before energizing the on-board relays. When  
the relays energize, heating voltage is delivered to the  
cylinder. After a 30 second delay, the fill valve is  
activated (if the output from the cylinder is below 100  
%). If controller detects increase of amperage above  
allowed range, the unit will activate drain valve for 2  
seconds.  
For periods of time with no call for humidity, longer  
than 2 days, the humidifier automatically drains water  
from cylinder.  
MANUAL CAPACITY ADJUSTMENT  
The RESDELUX humidifier is rated in lbs/hr of  
steam output capacity. Set to 100%, it will operate at  
full output until the humidistat has sensed that the  
humidity has reached setpoint, it will then stop when  
the control circuit 1-2 is interrupted. See Figure #13.  
During operation, the controller measures the rate  
at which water is converted to steam and thus the  
mineral content of water inside the cylinder. When this  
rate exceeds the design optimum, a drain of the  
cylinder takes place. The amount of water drained is  
just enough to keep the contained water at design  
levels.  
If the humidifier is oversized, the humidistat will be  
quickly satisfied (less then 10 minutes) and stop the  
humidifier. As the humidity level drops the humidistat  
starts the humidifier again. It is quickly satisfied and  
stops again. The resultant short-cycling can be easily  
overcome. A manual capacity adjustment  
potentiometer is provided on the RESDELUX main PC  
board to increase the runtime to about 15 minutes. It  
is marked “CAPACITY ADJUSTMENT” and is  
During start up, when mineral content in the water  
is low, water will reach the top of the cylinder at which  
point the yellow indicator light will come on. This is  
normal operation with a fresh cylinder. After a period of  
time the water level will drop and the yellow light will  
turn off.  
adjustable from 25 to 100% of operating rating.  
OTHER POTENTIOMETERS  
Do not adjust any other potentiometers on the PC  
board. They are factory-set and not to be adjusted in  
the field.  
High water level in the cylinder also indicates that  
the cylinder is near the end of its service life as  
electrodes become coated with minerals. The yellow  
light coming on more often would be the first indication  
of approaching the end of the cylinder life.  
MAINTENANCE  
As with all automatic and mechanical devices,  
humidifiers require periodic maintenance and  
servicingeither by the user or competent service  
personnel to provide continued customer  
satisfaction, longer equipment life and reduction in  
customer cost.  
Figure #15  
Operation Schematic  
CONDENSATE RETURN  
(OPTIONAL)  
WARNING! DISCONNECT THE UNIT FROM  
THE POWER SUPPLY BEFORE SERVICING.  
The plumbing and electrical compartments contain  
high voltage components and wiring. The access door  
is equipped with a lock. Access should be limited to  
authorized personnel only.  
FILL  
CUP  
STEAM HOSE  
1” AIR  
GAP  
1
2
3
ELECTRODES  
1. INLET CHAMBER  
2. FILL CHAMBER  
3. WATER OVERFLOW  
CHAMBER (SAFETY DRAIN  
IN CASE OF FILL VALVE/  
CONTROL BOARD FAILURE)  
Note: Review periodic maintenance. Checklist on page  
16.  
CYLINDER  
STEAM CYLINDER  
STRAINER  
FILL  
VALVE  
WHEN TO REPLACE THE STEAM CYLINDER  
TAP WATER  
SUPPLY  
DRAIN  
VALVE  
DRAIN  
PAN  
DRAIN  
CONNECTION  
After a period of operation (not on initial startup),  
the water level will approach the top of the cylinder.  
DRAIN CANAL  
(OPEN TO ATMOSPHERE)  
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(Life varies from 500 to 2000 operating hours, as  
illustrated in Figure #16.)  
cylinder or quote the unit’s serial number, model and  
voltage located on the spec label (nameplate).  
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.  
1.  
2.  
Turn off the water supply to the unit.  
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).  
Figure #16  
Water Conditions vs. Cylinder Life  
Capacity Adjustment Setting  
50%  
100%  
25%  
30  
20  
500  
400  
3.  
4.  
When completely drained, push the main  
ON/OFF/DRAIN switch back to the OFF position.  
Once drained, disconnect all power supplies to  
the unit.  
200  
10  
5.  
6.  
Open the front cover door.  
Cylinder plugs are attached to the primary  
voltage cylinder wires. Remove cylinder plugs  
from cylinder pins by pulling vertically.  
100  
5
500  
1000  
2000  
4000  
Cylinder Life Expectancy  
8000  
(average operating hours)  
7.  
8.  
9.  
Using a slotted screwdriver, loosen the steam  
hose clamp(s) and pull the steam hose off the  
cylinder vertically.  
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  
The cylinder is now ready to be lifted out of the  
unit. CAUTION: Cylinder and any undrained  
water might still be HOT.  
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.  
Figure #17  
Cylinder Replacement  
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.  
Figure #18  
Reassembly Of The Drain Valve And Fill Valve  
Actuator  
MaleSlip-on  
ConnectionTabs  
Sleeve  
Plunger  
Spring  
HoldingCoil  
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3. This color-coding must be adhered to when  
replacing cylinder plugs on pins.  
12. Push the two slip-on terminals back onto the two  
tabs on the coil. The terminals, although not  
identical, are reversible.  
4. The electrode plug with the orange wire always  
goes on the single pin surrounded by a plastic  
shoulder.  
WARNING: To prevent the possibility of electrical  
shock the green ground wire must be reinstalled  
before power is restored.  
5. Ensure that cylinder plugs fit snugly on the pins.  
EXTENDED SHUTDOWN  
6. If a cylinder plug becomes loose the cylinder  
harness must be replaced (P/N 158-1305 see  
parts list).  
Before disconnecting power to the humidifier at  
the end of humidification season, ALWAYS DRAIN the  
cylinder first. Otherwise, the electrodes are subject to  
harmful corrosion which shortens cylinder life. Do  
NOT leave the switch in the DRAIN position  
MANDATORY CLEANING OF THE DRAIN  
VALVE  
indefinitely as the drain coil could burn out. Leave the  
switch in the OFF position and “open” the main  
external fused disconnect to stop power to the  
humidifier. Close the shut off valve in the water supply  
line feeding the humidifier. Lock the cabinet door(s) to  
prevent unauthorized tampering. All doors are factory  
supplied with keyed locks. DO NOT LEAVE THE KEY  
IN THE LOCK. ACCESS SHOULD BE LIMITED TO  
AUTHORIZED PERSONNEL ONLY.  
Always clean the drain valve before installing a  
new cylinder since the valve port may be as dirty as  
the used cylinder.  
1. Note the ring terminal for drain valve green ground  
wire is sandwiched between the drain valve body  
and drain pan.  
2. Remove the two screws securing drain valve body  
to the drain pan. Disconnect the two slip-on  
terminals from the two tabs on the (24 Vac) drain  
valve coil.  
3. Remove the hose clip and hose connection from  
drain valve body.  
4. The drain valve assembly is now free to be taken  
to a sink for disassembly and cleaning.  
5. Remove the snap-fit red cap from the coil  
assembly and slide coil off the actuator.  
6. Loosen the actuator with a wrench and unscrew  
from the plastic valve body.  
7. Clean the exposed core, spring and plastic drain  
valve port.  
8. The tapered end of the spring must be installed  
toward the solenoid. Reassemble and tighten the  
actuator 1/4 turn past hand-tight.  
9. Clean out the end of the hose, then reconnect it to  
the drain valve body with the clamp.  
10. Inspect the o-ring to make sure it is in good  
condition.  
11. Fit mounting screws through the drain valve body,  
one through the ring terminal on green ground  
wire.  
- 10 -  
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is provided in the section titled OPERATION. For  
a more detailed understanding please contact  
your NORTEC representative.  
TROUBLESHOOTING  
PLEASE READ THIS SECTION BEFORE  
REFERENCING SPECIFIC DIAGNOSTIC  
MESSAGES.  
3.  
4.  
When contacting your local representative or  
NORTEC for troubleshooting assistance, please  
ensure the serial number has been obtained for  
reference purposes.  
1.  
Ensure the installation detail conforms with the  
recommendations contained in the Installation  
section of this manual.  
Whenever the troubleshooting steps indicate a  
problem with the main PCB, first check all  
connections at the main control board.  
2.  
Understanding the Principle of Operation is an  
asset when troubleshooting. A basic description  
DIAGNOSTIC PROCEDURES - TROUBLESHOOTING  
The RESDELUX controller provides a number of messages to simplify troubleshooting procedures. The following  
table presents fault messages displayed by the controller, their meaning and possible corrective actions. Refer to the  
following section for detailed information about terms used in the table.  
Table #4 - Troubleshooting Guide  
Unit Status Lamp  
Symptom  
Corrective actions  
Yellow  
On  
Green  
On  
Maximum water level This usually happens on initial start-up after replacing the cylinder  
inside cylinder.  
(normal).  
Water is concentrated with minerals inside the cylinder.  
Let unit run, yellow light will disappear when the unit is at full  
output. This may take a day or two.  
Off  
Off  
Off  
No power to the  
board.  
Check for main power supply fault.  
Turn power switch to ‘Drain’ position. If drain valve is activated  
(sound of solenoid), check connection to the board or board itself.  
When no sound present, check fuse (replace with 1.5A if needed),  
transformer (voltage should be present between fuse holder and  
ground screw).  
1 flash  
sequence  
Over current.  
Check drain valve operation, drain time, possible drain restrictions.  
Check if fill valve leaks (not holding supply water).  
Back pressure may also cause very conductive water conditions.  
Was the humidifier short cycling?  
Operating amperage  
exceeded 130% of  
rated amps. Water is  
drained from the  
cylinder (drain valve  
on for 10 min.).  
Check for short cycling.  
2 flashes in Off  
sequence  
No current  
Check water level in the cylinder - should be more than ¼ full. If not  
check fill rate, 24 VAC voltage on fill valve terminals (unit must be  
on with call for humidity - green light steady on). Verify fresh water  
supply to the humidifier. Leaking drain valve can be at fault  
(minerals blocking the plunger).  
detection for 30  
minutes with  
continuous call for  
humidity.  
If cylinder is more than ¼ full, check primary power, connections to  
the cylinder, continuity of wires to cylinder.  
Are power wires connected to proper terminals on the cylinder?  
(Color coding)  
Possibly wrong cylinder type.  
Low water conductivity.  
4 flashes in Off  
sequence  
End of cylinder life - Check water level in the cylinder, should be about ¾ full.  
change cylinder.  
Check for foaming if water level lower or cylinder life shorter than  
expected.  
Change cylinder, clean drain valve.  
- 11 -  
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SHORT CYCLING  
When the ‘on time’ of the humidifier is less than  
PROCEDURES AND TERMS USED IN  
DIAGNOSING  
ten minutes upon a call for humidity. To correct short  
cycling, all humidifiers have a capacity adjustment  
which allows the output of the humidifier to be reduced  
as low as 25% of rated output, thus extending the ‘on  
time’ required to maintain output. Excessive short  
cycling may cause higher water conductivity (mineral  
content) than designed for the unit.  
PRINCIPLE OF OPERATION  
The conductivity of the water within the cylinder  
must be controlled in order for the humidifier to  
function properly. The fill and drain rates must be  
maintained. Filling too quickly can cause over-amping  
and automatic shutdown or blown fuses. Filling too  
slowly can cause insufficient steam output and  
foaming. Water supply pressure should be between  
25 and 110 psig. Draining too slowly can cause  
over-concentration and malfunction due to foaming.  
These are just some examples of what can go wrong if  
the fill and drain rates are not maintained.  
FOAMING  
A phenomenon which can occur in water when  
impurities, already in the water, reach an excess  
concentration as result of boiling away pure water and  
the continued boiling action agitating the contained  
water. The humidifier electronics are designed to  
prevent this occurrence although in extreme cases  
water will foam with little concentration, making it  
necessary to have the drain time of the water,  
contained in the cylinder, increased. Foaming is  
normally caused by short cycling, a restricted drain, or  
back pressure. The foam, generated in these  
instances, is conductive and may lead to a false full  
cylinder indication if the level of the foam approaches  
the top of the cylinder.  
FILL RATE  
Fill rates of suspect units should be checked. Fill  
rates should measure nominally at 1" to 1-1/2" of  
vertical rise in water level in the cylinder in one minute.  
Clogged fill valve will cause lower fill rate. The fill  
valve strainer is removable and can be cleaned.  
DRAIN TIME  
BACKPRESSURE  
Manual drain time of a half full cylinder takes  
approximately 25 seconds.  
Restriction of steam flow caused by improperly  
sloped steam lines, elbows changing the direction of  
the steam flow from horizontal to vertical without a  
condensate drain leg, and any plumbing detail allowing  
the accumulation of condensate.  
If time measurements are longer, repeat with the  
external drain disconnected (and draining into a pail)  
to verify that the external drain is impeding flow. If it  
still does not drain, check for a clogged strainer or  
drain.  
MONITORED LEG  
A clogged strainer or drain valve will cause  
shortened cylinder life. Determine what caused the  
strainer or drain valve to clog in the first place.  
Refers to the primary wire, to the cylinder, which  
loops through the current sensing device on the main  
PCB. This wire is terminated at the red cylinder plug  
at the cylinder.  
Do not assume that if a strainer and/or drain valve  
is clogged that it is to blame. If the external drain has  
been impeding flow then waste accumulates resulting  
in a clogged strainer or clogged drain.  
Clean the drain valve and install a fresh cylinder.  
Then measure the manual drain time with and without  
the external drain connected. Is the external drain  
impeding flow? NORTEC recommends an open  
external drain line. See the Installation section of this  
manual.  
RATED AMPERS  
This refers to amps listed on the humidifier  
specification label.  
- 12 -  
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SPARE PARTS LIST AND EXPLODED VIEW - RESDELUX  
Item Number  
Part Number  
Description  
1
151-9002  
158-1820  
153-5062  
158-1830  
158-1821  
158-7104  
185-3104  
145-6000  
145-5002  
132-6002  
132-6004  
131-3244  
145-5000  
145-5004  
149-5072  
132-6129  
158-1450  
142-1050  
132-8850  
132-8860  
132-5023  
132-5035  
132-1216  
132-5064  
163-1026  
158-3511  
150-1491  
158-3126  
132-3097  
158-1309  
158-1305  
135-4012R  
135-4012B  
132-4012W  
158-1311  
158-1312  
150-2326  
132-8810  
158-5001  
132-8841  
Cylinder type 202  
2
Steam distributor kit  
3
Steam distributor  
4
Steam blower pack  
5
Steam Hose 4’ long  
6
Cabinet front door  
7
Lock assembly with keys  
Drain valve complete  
8
8a  
Screw Drain Valve  
9
Drain valve coil assembly  
Drain valve o-ring  
10  
11  
Fill valve assembly  
11a  
11b  
12  
Fill valve gasket only  
Fill valve screw  
Brass fitting with gasket  
Elbow  
12a  
13  
Fill cup assembly kit with hoses and clamps  
Fill cup  
13a  
13b  
13c  
13d  
13e  
14  
Condensate hose (small dia.)  
Condensate hose (medium dia.)  
Clamp small house  
Clamp medium hose  
Drain canal round  
14a  
15  
Screw drain canal  
Gasket for round drain canal  
Power control board (provide unit serial number when ordering).  
Transformer 120/24 Vac  
Fuse 1.5A  
16  
17  
18  
19  
On/Off/Drain switch  
20  
Wire harness - drain & fill valves  
Wire harness - cylinder, complete  
Cylinder plug RED  
21  
21a  
21b  
21c  
22  
Cylinder plug BLACK  
High water sensor pin  
Power Supply  
23  
Blower Fan Assembly  
Wire extension for blower pack  
Steam Hose (Specify Length)  
Steam and condensate hose support bracket (Specify Quantity)  
Condensate Line (Specify Length)  
24  
Not Shown  
Not Shown  
Not Shown  
- 15 -  
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4
23  
24  
22  
5
2
3
21a  
16  
18 21b  
17  
21c  
1
7
6
13a  
13d  
13e  
13b  
20  
8a  
10  
19  
13c  
11b  
15  
14  
11a  
11  
8
9
12  
12a  
14a  
- 16 -  
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PERIODIC MAINTENANCE CHECKLIST  
PREVENTIVE MAINTENANCE AND SERVICE CHECK LIST FOR NORTEC’S RESDELUX  
Customer ______________________________________________________________  
Address ____________________________________________________________________________  
Equipment Location ________________________ Serial # _______________________  
Date Last Inspected _________________ Date of this Inspection __________________  
Inspected By ________________________________________________________________________  
Humidifier ___________________________________________________________________________  
Company Name _____________________________________________________________________  
Model Number ___________________________________________________________  
Inspect, Check, Clean, and Adjust all items listed.  
STEAM GENERATORS...................................................................................................r  
Replace cylinder, check drain valve, and fill valve.  
SUMP AND DRAIN LINES..................................................................................................................r  
Clean sump and drain lines and make sure drains and drain lines are free of restrictions.  
Check for leaks and proper water level.  
STEAM DISTRIBUTION.......................................................................................................................r  
Check steam line sloping, no leaks, no condensate around blower pack or distribution  
nozzle.  
CONTROLS......................................................................................................................r  
Humidistat, check for proper operation. All electrical terminals for tightness. Disconnect  
switch, check operation.  
KEY: r - Okay  
r - Needs Additional Service  
r - Repair or Replace  
Remarks: ______________________________________________________________  
_____________________________________________________________________________________  
_____________________________________________________________________________________  
_____________________________________________________________________________________  
- 17 -  
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LIMITED WARRANTY  
Walter Meier Inc. and/or Walter Meier Ltd. (hereinafter collectively referred to as THE  
COMPANY), warrant for a period of two years from date of shipment, that THE COMPANY’s  
manufactured and assembled products, not otherwise expressly warranted (with the exception of  
the cylinder) are free from defects in material and workmanship. No warranty is made against  
corrosion, deterioration, or suitability of substituted materials used as a result of compliance with  
government regulations.  
THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing  
replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the defective part(s)  
is returned freight prepaid by the customer. Parts used for repairs are warranted for the balance of  
the term of the warranty on the original humidifier or 90 days, whichever is longer.  
The warranties set forth herein are in lieu of all other warranties expressed or implied by law.  
No liability whatsoever shall be attached to THE COMPANY until said products have been paid for  
in full and then said liability shall be limited to the original purchase price for the product. Any  
further warranty must be in writing, signed by an officer of THE COMPANY.  
THE COMPANY’s limited warranty on accessories, not of Walter Meier’s manufacture, such as  
controls, humidistats, pumps, etc. is limited to the warranty of the original equipment manufacturer  
from date of original shipment of humidifier.  
THE COMPANY makes no warranty and assumes no liability unless the equipment is installed  
in strict accordance with a copy of the catalog and installation manual in effect at the date of  
purchase and by a contractor approved by THE COMPANY to install such equipment.  
THE COMPANY makes no warranty and assumes no liability whatsoever for consequential  
damage or damage resulting directly from misapplication, incorrect sizing or lack of proper  
maintenance of the equipment.  
THE COMPANY retains the right to change the design, specification and performance criteria  
of its products without notice or obligation.  
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Model #:  
Serial #:  
Cylinder #:  
Cylinder Last Replaced:  
_________________________  
MTH/DAY/YR  
_________________________  
MTH/DAY/YR  
_________________________  
MTH/DAY/YR  
E6518  
Walter Meier (Climate USA) Inc.  
826 Proctor Avenue, Ogdensburg, New York 13669  
Walter Meier (Climate Canada) Ltd.  
2740 Fenton Road, Ottawa, Ontario K1T3T7  
Tel: 866 NORTEC 1 Fax: 613 822 7964  
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