Trion ComfortSTEAM Installation, Operation & Maintenance Manual

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Comfort

STEAM

Humidication System

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Installation, Operation, & Maintenance Manual

COMFORTSTEAM

READ AND SAVE THESE INSTRUCTIONS

LIRE ET CONSERVER CES INSTRUCTIONS

TABLE OF CONTENTS

HOMEOWNER SECTION

1. Warranty Statement .................................................................................................................................3

2. Safety Warnings .......................................................................................................................................3

3. Warnings and Disclaimer .........................................................................................................................4

4. Homeowner Instructions and User Manual .............................................................................................. 4

5. Start-Up .................................................................................................................................................... 5

6. How to Control the Humidity ....................................................................................................................5

7. Functions of the Electronic Circuit ...........................................................................................................6

8. What to do if a Malfunction Occurs .......................................................................................................... 7

9. Description of Error Codes .......................................................................................................................7

10. Cleaning the Tank ....................................................................................................................................8

11. Preventative Maintenance .......................................................................................................................9

CONTRACTOR INSTRUCTIONS SECTION

12. Unpacking the Unit ................................................................................................................................... 10

13. Dimensions and Available Models ...........................................................................................................11

14. Detailed View of Wiring ............................................................................................................................ 12

15. Installing the Steam Hose and the Steam Diffuser ................................................................................. 14

16. Installing the Humidier ........................................................................................................................... 16

17. Installing the Water Supply ...................................................................................................................... 18

18. Installing the Air Pressure Probe ..............................................................................................................19

19. Making Electrical Connections ................................................................................................................. 20

20. Installing and Connecting the Humidistat ................................................................................................. 20

21. Start-up and Test Procedure ....................................................................................................................21

22. Wiring Diagrams ...................................................................................................................................... 22

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1. Warranty

Humidier 5-Year Limited Warranty

This limited warranty covers Trion Residential Type Humidiers, excluding duct work, wiring and installation. Trion warrants that all new Trion humidiers are free from defects in material and workmanship under normal, non-commercial use and service. Trion will remedy any covered defects if they appear within 60 months from the date of original installation & subject to the terms and conditions of this Limited 5-Year

Warranty stated below:

1. THIS LIMITED 5-YEAR WARRANTY is granted by Trion Customer Service, 101 McNeill Road, Sanford, NC 27330.

2. This warranty shall extend only to any non-commercial owner who has purchased the residential humidier other than for purposes of resale.

3. All components are covered by this limited warranty except expendable items, such as evaporative pads, media lter pads and nozzles.

4. If, within the warranty period, any Trion residential humidier unit or component requires service it must be performed by a competent heating and/or air conditioning contractor (preferably the installing contractor). Trion will not pay shipping charges, or labor charges to remove or replace such defective parts or components. If the part or component is found by inspection to contain such defective material and workmanship it will be either repaired or exchanged free of charge at Trion’s option, and returned freight collect.

5. In order to obtain the benets of this limited 5-year warranty, the owner must notify the dealer or distributor of any defect within 30 days of its discovery. If after reasonable time you have not received an adequate response from the dealer or distributor, notify in writing to Trion Customer Service 101 McNeill Road, Sanford, NC 27330, or call 1-800-884-0002 or email customerservice@trioniaq. com Humidiers which have been installed or become part of real estate cannot be returned. Trion will receive, freight prepaid, only removable parts or components of such defective humidiers.

6. This limited warranty does not apply to any part or component that is damaged in transit or in handling, has been subject to misuse, neglect or accident; has not been installed, operated and serviced according to Trion’s instructions; has been operated beyond the factory rated capacity; or altered in any such way that its performance is affected. There is no warranty due to neglect, alteration or ordinary wear and tear. Trion’s liability is limited to replacement of defective parts or components and does not include the payment of the cost of labor charges to remove or replace such defective components or parts.

7. Trion will not be responsible for loss of use of any product; loss of time, inconvenience, or any other indirect, incidental or consequential damages with respect to person or property, whether as a result of breach of warranty, neglect or otherwise. SOME

STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION

OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE

LIMITATION OR EXCLUSION IN THE PRECEDING SENTENCE

MAY NOT APPLY TO YOU.

8. THIS WARRANTY GIVES YOU SPECIFIC RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE

TO STATE.

9. Any warranty by Trion of merchantability, tness for use or any

other warranty (express, implied or statutory), representation or guarantee other than those set forth herein, shall expire at the expiration date of this express limited warranty. SOME STATES

DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED

WARRANTY LASTS, SO THE LIMITATION IN THE PRECEDING SENTENCE MAY NOT APPLY TO YOU.

10. Trion reserves the right to make changes in the design and material of its products without incurring any obligation to incorporate such changes in units completed on the effective date of such change.

2. Safety & Warnings

DANGER

RISK OF ELECTRIC SHOCK

Before cleaning, servicing, or parts replacement, the unit must

be disconnected from all sources of electricity.

WARNING

Improper installation, adjustment, alteration, service, or main-

tenance may cause property damage, injury, or death. This

appliance must be installed according to these instructions.

Read these instructions thoroughly before installing or servic-

ing the unit.

CAUTION

Read these instructions thoroughly before installing this unit.

Check data label and verify electrical specications agree

with those at the point of installation.

WARNING

Failure to install this unit in a position that is level and plumb

may impair the unit’s ability to drain if an overow condition

presents itself. Damage to personal property may also result.

WARNING

Installation in freezing conditions can result in unit failure.

Damage to personal property may also result.

WARNING

A drain safety pan should be installed under the unit and any

supply water / drain connections to prevent damage to prop-

erty in the event of a water leak or faulty operation.

CAUTION

Trion recommends that this humidier be installed by a trained HVAC professional. Do not connect the unit to the power source until the installation is complete. A thorough checkout of the unit installation should be completed before operating the unit. Failure to follow these directions may void the manufacturer’s original warranty.

WARNING

Electrical power to the furnace must be disconnected before proceeding. Serious injury or death may result.

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Installation, Operation, & Maintenance Manual

HOMEOWNER / CONTRACTOR

3. Warnings and Disclaimer

Please read and understand the warnings and instructions fully before you begin this installation and keep them for future reference.

The manufacturer will assume no responsibility and the warranty will be void if the installer or the user does not adhere to the following precautions:

1. This humidier will be connected to and used under water pressure and it must be installed in such a way that if a leak occurs, the water could not cause any damage to the property. Make sure all water connections are properly installed or a water leak could occur.

2. This humidier is intended for use on forced warm air circulation furnaces, as well as multi-fuel furnaces, which have, at least, one supply duct connected to the furnace and where a positive air pressure can be measured.

3. Do not install a humidier where the surrounding temperature may be 32ºF (0ºC) or colder. Freezing water will damage the humidier and may burst the supply line, resulting in property damage.

4. Do not install the humidier directly on the furnace housing.

5. Always check that you are not about to cut or drill into an air

conditioning coil or electrical accessory during installation.

6. Do not install a humidier if the city water pressure exceeds 90 psi. Check the local codes related to pressure reduction.

7. Do not install the steam delivery stub or steam diffuser in the supply duct if the pressure exceeds 0.5” Water Column (0.125 kPa).

8. The installation, wiring and plumbing of the humidier must comply with national, state and local electrical, plumbing and building codes.

9. Electrical wiring and water lines must not come in contact with sharp edges or hot surfaces.

10. Make certain an appropriate drain system is installed and there is no resistance to the ow of the discharged water.

11. Do not set the humidity level higher than that recommended or condensation damage will occur.

12. Please beware of sharp edges when you cut into a metal duct.

13. Always shut the power off before you start the installation or

when doing maintenance. An electric shock from 120 or 240 volts could cause serious injury or death.

14. When you perform maintenance, please be careful because the unit can be extremely hot. Always allow enough time for the unit to cool down.

15. To prevent electric shock or injuries, never operate the humidier without the cover as there are high voltage and high temperatur components inside.

16. This humidier will only work with standard potable water, not with technical water. The maximum water supply temperature is 86 ºF (30 ºC).

4. Homeowner Instructions and User Manual

Figure 1 - External View

Figure 2 - Top and Side View

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5. Start Up

The startup of the humidier is done as follows:

• Put the main power ON at the electrical panel. The green

pilot light comes ON. The humidier is ready to work.

• Open the water supply valve.

• Adjust the knob on the humidistat.

Note: The humidier may perform a ush cycle prior to producing humidity. If the yellow drain LED is lit and the unit appears not to be operating properly, allow the unit at least 15 minutes to begin normal operation. This is considered normal as the control system ensures that all systems are stable before operation.

Working Principle:

• Unlike other types of humidiers which produce humidity

by passing warm air on a water curtain, a rotating pad or another type of media, this humidier produces humidity from steam dispersed directly into the supply duct.

• A humidistat (installed either on the wall or the air return

duct) controls the unit. Adjust the setpoint of the humidistat according to your need or comfort. Please read the next section about the humidity control.

• When the humidistat senses a need for humidity, it starts the

humidication process.

• The tank lls with water.

• The electronic control starts the fan in the furnace to move

the air as the humidier starts boiling water and producing steam. If the fan cannot start (i.e. there is no air movement to transport the steam or insufcient air pressure), the humidier stops itself. Please note that it may take a few minutes to bring the water to a boil. The steam exits the water tank through the steam hose, moves to the steam delivery tube installed in the warm air duct and is released into the duct where it mixes with the moving air.

• As water evaporates, the electric valve opens as needed to

replenish the water in the tank.

• When the humidity reaches the desired level, the humidier

stops producing steam. In order to eliminate the residues and keep the tank as clean as possible, the humidier also drains after a certain number of boiling / rell cycles. This is determined by the DIP switches on the lower right corner of the electronic control board. If there is still a demand from the humidistat after draining, the tank rells and starts to produce steam again. This process is part of the selfcleaning feature.

• When the humidistat is satised, the fan continues to run for

a short period of time in order to eliminate the steam from the ducts and the unit goes to ready mode, waiting for the next call from the humidistat.

6. How to control the humidity

Humidity between 35-40% is desirable. However, you should take the outside temperature into consideration before setting the humidity level in order to avoid condensation on the windows.

If you installed a ComfortSteam humidistat and an outdoor sensor, a setpoint adjustment will be done automatically as the outdoor temperature falls. The outdoor sensor reduces the setting of the humidistat according to the outdoor temperature during cold days without having to set the humidistat knob manually.

It does the opposite during mild days. Please see the below table for the percentage of relative humidity on the electronic humidistat label. The middle of the scale corresponds to the middle of the comfort zone, approximately 35% RH (Relative Humidity).

If you are using a mechanical or other humidistat, the adjustment according to the outside temperature will have to be done manually. For your information, the following table shows the recommended setting of the humidistat according to the outside temperature. Please see Fig. 3.

Outside Temp Recommended Setting

-22°F (-30°C) 15%

-13°F (-25°C) 20%

-4°F (-20°C) 25% +5°F (-30°C) 30% +14°F (-10°C) 35% above: +23°F (-5°C) 40%

Figure 3

No matter which humidistat system you are using, please be aware that the humidity level cannot adjust quickly. It may take some time to build up the humidity to your comfort level. Depending on the dryness of the house, carpets, furniture, drapes and wood will absorb moisture before you can feel the change.

HOMEOWNER

Comfort

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If the house remains unoccupied during the winter season, set the humidistat to the minimum set point in order to prevent condensation.

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7. Functions of the Electronic Circuit

The electronic board located inside the unit controls all the humidier functions. The front panel is equipped with pilot lights indicating the status of the humidier. Please see Fig. 5. Please see below for a reference to the description of the functions.

The red pilot light, which is a warning light, can either glow all the time or ash when activated.

In case of error, the humidier enters stand-by mode. The ashing of the pilot lights indicates which error happened. The error recognition sequence is as follows:

• The green pilot light near the power button blinks once;

• The red light ashes a certain number of times, this is the error code;

• A pause with no light at all;

• Another blink of the green light, once;

• Another series of ashing of the red light;

• And so on until the condition is reset or service is performed. Shutting the power OFF at the breaker in the main panel or

depressing the power button until the green light is fully on will reset the error code.

The COMFORTSTEAM humidistat also has two pilot lights to indicate the current status.

The green light is lit when the humidistat is demanding for humidity, thus activating the boiling cycle. The red light indicates a warning and reproduces the same warning code as the red light on the humidier control panel. If ever the red light is lit or ashing on the humidistat, you know immediately that the humidier needs attention.

Figure 5 - Modes

Icon Display Status Description

HOMEOWNER

On/Standby

Green Light

White

Button

Fan

White Light

Warning

Red Light

Steam

White Light

Filling Cycle

Blue Light

OFF The humidier has no power – Breaker is OFF.

Blinking The humidier has power, but is in standby mode.

ON The humidier has power and is functional.

Press to put the humidier in stand-by mode. The green light is blinking. Press and keep depressed 3 seconds to power or reset the humidier. The green light is ON.

ON The fan control is activated.

ON An abnormal condition occurred.

Please refer to the error code table in Section 7.

ON The humidier is heating water to produce steam.

ON The electric water valve is open thus lling the humidier.

Draining Cycle

Yellow Light

White Button ON Not active on residential models.

ON The humidier is in draining mode.

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8. What to do if a malfunction occurs

• Shut the main power OFF and restart the humidier to see if the error code disappears.

• If you see a water leak, follow the water supply tube and close the valve installed on the water pipe located near the humidier.

• Please refer to the error code table to identify the possible cause of the malfunction and the actions that you can take.

• Should the problem persist, please call your service company. They are the best qualied to help you quickly. Describe the

problem to them and mention the error code you observed on the front panel. They may help you solve the problem over the phone. If needed, they will x the problem themselves or call our technical service.

• Should you attempt to look at the unit yourself, please apply all appropriate safety measures. - Shut the main power OFF and

wait for the unit to cool before you open it.

9. Description of error codes

Number of

ashes of the

red light

OFF No error The humidier is working

Continuous ONThere is water in the

1 Problem with the

2 Inadequate water

4 Inadequate

5 Not enough air ow

6 Temperature inside

Error Description Humidier Status Actions to be taken by the

ne

Risk of overow. Humidier

pan under the tank.

water level sensors inside the unit.

supply.

drainage.

or pressure in the supply duct

the tank exceeded the high temperature limit and the safety switch has tripped.

stops itself.

Internal problem - Humidier cannot read the water level properly and stops itself.

Humidier cannot ll properly and stops itself

- Heating elements and supply valve are switched

off.

Humidier cannot drain properly - Risk of overow the unit stops itself.

Humidier stops itself. Turn the main power OFF,

This is a very serious condition. The humidier stops itself and cannot start without service.

Owner

None

Turn the main power OFF, then

- Open the unit and check for leaks - Check the drain tube Close the supply valve and call for service

Turn the main power OFF, then call your service company.

Turn the main power OFF, then - Check the water supply circuit - Check if the water supply valve is open. - Call your service company

Turn the main power OFF, then

- Close the supply valve - Call your service company.

then - Check the air lter in the furnace. It may be clogged up Call your service company.

Turn the main power OFF, then call your service company

Reset

Automatic Reset when switching main power ON again.

Automatic Reset when error conditions disappear.

Only the service company can reset the unit after checking all functions.

HOMEOWNER

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Installation, Operation, & Maintenance Manual

10. Cleaning the tank

As with any device evaporating water, some minerals normally dissolved in the water may create deposits inside of the unit. Even though the unit is draining and ushing itself during normal operation , it will require a bit of maintenance from time to time.

WARNING:

• The water tank and its contents can become extremely hot. Please be careful when you handle it.

• The tank may have water inside.

To drain the humidier, ensure that the humidistat is calling for humidity (You may have to adjust the setpoint higher to make this happen), then cycle the main power and the unit will enter a drain cycle. It may take a few minutes for the tank to begin lling as it needs to do to envoke the siphon draining system. Once the unit is drained, there will be approximately one inch of water in the bottom of the tank. At this time the main power should be turned off and the unit should be allowed to cool.

Wait until the unit has cooled before proceeding with the following steps.

1. Before proceeding, ensure the main power is OFF.

2. Remove the cover by turning the two 1/4 turn screws to the left.

3. Unplug the white quick connect wire connected on the water pan at the bottom of the unit. This wire is connected to the overow

sensor. Please see Fig.6

HOMEOWNER

Figure 6

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10. Cleaning the tank continued

4. Pull the plastic tube attached to the bottom of the unit out of the rigid drain pipe on the wall. You do not have to remove the plastic

tube attached to the bottom of the pan. Remove the overow pan from the unit by slightly loosening the front screw then lifting the front of the pan off the screw and pulling it towards you. Please see Fig. 6. Remove the main drain tube from the rigid drain pipe attached to the wall and check that they are both clean and clear from deposits.

5. Check that the water tank is not too hot to handle. Unfasten the latch around the water tank and remove the tank from the main

body of the humidier by pulling it down. When you remove the tank, it is possible to clean the round o-ring gasket, but don’t discard it.

NOTE :This round gasket is mandatory and the unit will not work properly without it.

6. Soap or vinegar can be used to clean the water tank, the heating element and the tips of the level sensors. Other cleaning

products used to remove scale, lime or calcium are also available on the market, but DO NOT use a metal brush or any strong acids to clean the tank as they may damage the stainless steel.

4. Once completed, reinstall the round gasket around the water tank collar. Please see Fig. 7. Align the two arrows located at the

front of the tank and the xed part while lifting the tank in place. Please see Fig.8. Apply even pressure to secure the tank properly in the top part. Then close the latch holding the tank in position. Verify that the o-ring gasket and tank are seated properly.

Figure 7

Figure 8

5. Put the overow pan under the tank by sitting it back on its holding screws.

6. Reconnect the white wire of the overow sensor on the water pan.

7. Put the overow and main drain tubes back into the rigid drain pipe attached to the wall.

8. Put the cover back on the humidier and lock it with the two quarter-turn screws.

9. when nished, turn the main power back “ON” and readjust the humidistat to it’s previous setpoint.

11. Preventative Maintenance

Preventive maintenance to be performed every two years.

HOMEOWNER

In order to avoid problems due to accumulation of deposits, we suggest that you replace the centre metal tube, the silicone drain tube and the low level sensor. We also suggest you replace the round o-ring gasket around the tank. All these components are available in a tune-up kit. To prepare for the Summer Season

• Shut the main power OFF

• Shut the water supply valve

• Perform a complete maintenance as described in section 8

• Dry the inside of the tank

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12. Unpacking the Unit

Contents: Please inspect the carton’s contents and report any missing parts or damage immediately. 1 Steam Humidier Unit 1 Main Drain tube (32” long – already installed and coiled inside the unit) 1 Steam hose (2 feet or 4 feet long x 1 inch I.D.) -depending on model 1 Steam delivery tube (6” L) or diffuser (12”, 15” or 19” L, depending on the humidier model) 1 Instruction and maintenance manual

1 Plastic bag containing installation material and hardware as follows: 2 Adjustable hose clips for the steam hose 1 Water hammer absorber (Red rubber hose with two brass ttings) Not supplied with model CFS-05B 1 Small bag - KIT #10S 1 Water supply tube (1/4” dia. x 7’ long) 1 Overow Drain tube for the pan (7/16” dia. x 24” long) 1 Pitot tube with plastic tube (5/16” dia. X 48” long)

NOTE : The electronic humidistat and the outdoor reset sensor are optional. They may be purchased separately. The humidistat can be either wall type (RH) or duct type (DH).

CONTRACTOR

Figure 9 - Detailed Water Tank View

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13. Dimensions and available models

Figure 10 - Humidifer Dimensions

Figure 11 - Available Models

CONTRACTOR

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Installation, Operation, & Maintenance Manual

14. Detailed View of Wiring

CONTRACTOR

Figure 12 - Top of Unit

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View and list of the wire harness by color and function.

CONTRACTOR

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Installation, Operation, & Maintenance Manual

PLEASE READ SECTIONS 15 AND 16 BEFORE PROCEEDING.

15. Installing the Steam Hose and the Steam Diffuser

Proper installation of the steam delivery tube/diffuser and steam hose is critical for the troublefree operation of the humidier. Please nd an accessible location on the duct and make sure you have a minimum length of 35” of straight duct downstream (without elbows or other obstructions on which the steam could condense), to allow the steam to disperse easily into the airow. Once a suitable location has been found make a 1 1/8” middle insertion hole in the warm air duct for the steam diffuser. For a horizontal duct, make the 1 1/8” hole in the lower third of the duct height. Please see Fig. 13a. For a vertical duct, make the 1 1/8” hole in the middle of the duct. Please see Fig. 13b.

Note: For High Velocity systems, the diffuser should be installed in the RETURN and not the warm air duct.

Figure 13a Figure 13b

Warning: Before installing anything on a duct, always check that you are not about to cut or drill into an air conditioning coil or

CONTRACTOR

electrical accessories.

• Insert the steam delivery tube/diffuser in duct and align arrow to point up. Fasten the steam diffuser to the duct using four #8 x 1/2” screws provided. in Kit #10S. Make sure the holes on the steam diffuser, where the steam exits from, are pointing up. Please see Fig. 13c.

• Install one end of the steam hose onto the steam diffuser using a hose clamp and tighten it.

Figure 13c

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PLEASE READ SECTIONS 14 AND 15 BEFORE PROCEEDING.

15. Installing the Steam Hose and the Steam Diffuser Continued

After installing the humidier (Section 15) use the second supplied hose clamp, to install the other end of the steam hose onto the steam outlet on the top of the water tank and tighten it. Never try to reduce the diameter of the steam hose or any added rigid piping. It has to be the same as the diameter of the humidier top steam outlet tting. The steam must ow without obstruction.

WARNING: Do not let the hose sag when it is connected to the duct. Please see Fig. 13d. A sufcient slope with no horizontal section is mandatory to allow any condensation to ow back naturally to the water tank. Please see Fig. 14e. If condensation water accumulates in the hose, the steam will not be able to escape normally through the steam delivery tube/diffuser and will lead to a malfunction of the humidier. Please keep in mind that the hose will soften when heated and will have a tendency to sag.

NOTE : If it is not possible to get enough slope for the condensation to return properly to the water tank, then an S-shaped steam trap (not supplied) must be installed at the lowest point of the steam hose. This steam trap hose should have a minimum height of 4”. Please see Fig. 13d.

Figure 13d

CONTRACTOR

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16. Installing the humidier

For ease of service, keep a minimum space of 24” in front of the unit.

• Remove the cover by turning the two 1/4 turn screws to the left and pull the cover towards you.

• Remove the white wire connected on the water pan at the bottom of the unit. This is the overow

• sensor.

• Remove the water pan by lifting the front off its holding screw and pull towards you. Do not remove those screws from the

humidier middle wall.

• The humidier must be installed on a vertical surface. Because of the length of the steam hose supplied, select the location of the unit as close as possible within a maximum of 2 feet of the steam delivery tube/diffuser. Please see Fig. 14 for necessary clearances around the humidier.

CONTRACTOR

REMINDER :

Figure 14

• Never install the humidier directly on the furnace body as this could void your furnace warranty.

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If a rigid drain pipe has to be installed under the unit and connected to the main house drain, we recommend a 1”

minimum I.D. tube or standard 1-1/2” I.D. ABS plumbing tube to do the installation. Please also install a siphon (P-trap) with a drain cap.

The two exible drain tubes coming from the humidier which are inserted in the rigid pipe require a minimum free vertical length of 18”. It is very important to leave an air gap between the rigid pipe and the tubes to allow the siphon to function properly. The exible tubes cannot touch the water contained in the siphon (Ptrap). Please see Fig. 15.

Figure 15

CONTRACTOR

• Since the unit is equipped with water level sensors, it is important to install it level from left to right and from back to front.

• Draw a level horizontal line on the wall and install two screws (# 8 minimum ) spaced at 11-5/8” from each other to hook the

humidier on the wall, then install two screws at the bottom of the unit and tighten them partially.

• Level the unit and tighten the four screws rmly.

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17. Installing the water supply

Important Notes :

• Turn off the main water supply before beginning.

• The supply valve (not supplied) must be attached to a cold water pipe only, close to the humidier. Since the unit is draining hot

water, cold water is added to reduce the temperature before sending the water to the drain.

• We recommend installing a quarter of a turn shut off valve (not supplied) near the unit.

• In case of well water or other water containing particles, we also recommend installing a little strainer in the water line to protect

the solenoid valve.

• Model CFS-05B comes with the water supply line factory installed. The water hammer absorber mentioned below is not included. Route water supply line as required.

The water intake tting on the top of the humidier must be wrapped with teon tape. Screw the water hammer absorber (piece of red rubber hose with two brass ttings) onto the water intake on the top of the humidier without stripping. Please see Fig. 16a. Also use the same double wrench method for tightening.

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Figure 16a

At the other end of the water hammer absorber, connect the water supply tube, using the same type of tting used on the water supply valve. Tighten the compression nut, without stripping, with two wrenches, one to hold the water hammer end, and one to turn the compression nut. Please see Fig. 16b.

NOTE : The brass ferrule supplied is to be used only if the plastic supply tube is replaced by a copper tube. Either system works with this humidier, but only plastic tubing is supplied.

Figure 16b

Keep the supply valve closed for now, you will open it during the start-up procedure.

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18. Installing the air pressure probe

The pressure probe (also called a Pitot tube) connected to the pressure differential switch inside the unit checks whether there is enough air pressure in the warm air duct to activate the humidier.

The probe has to be installed in the warm air duct, as close as possible to the humidier, but upstream (before the steam diffuser). A 48” long plastic tube is supplied to connect the pressure probe to the humidier. Warning : Before installing anything on a duct, always check that you are not about to cut or drill into an air conditioning coil or electrical accessories.

Drill a hole 3/8” dia. in an accessible location in the warm air duct.

Insert the probe and fasten it’s base to the duct using two sheet metal screws. The arrow visible on the probe ange indicates the air ow direction in the duct (i.e. the curved end of the probe has to face the air ow). Please see Fig. 17a and Fig. 17b.

Figure 17a Figure 17a

Push one end of the plastic tube onto the probe outlet. Slip the other end of the tube onto the plastic barbed connector at the end of the tubing already attached to the humidier. Please see Fig. 17c.

Figure 17c

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19. Making electrical connections

NOTE : All internal wiring is done at the factory. All external wiring shall be done by a qualied electrician and must conform to procedures, regulations and local codes.

• A dedicated breaker in the main panel (or fused disconnect) must be installed.

• The voltage of the available power supply must be the same as the one required by the humidier.

• Except for the 120 volt model, all other humidiers need a 3-wire connection (L1-L2-Neutral) in order to supply 120 volts to the

transformer located on the control board.

• Ensure that the wire size and protection equipment conform to the sizes required by the Electrical

• Code.

• Wire according to the wiring diagram supplied in the cover of the unit.

• Starting the fan is mandatory with this type of humidier. The electronic controller board has a small relay that supplies a

dry contact at the terminals marked “FAN” to start the furnace fan. The installer must use this contact to engage a bigger relay that starts the fan motor. Please refer to the furnace instruction manual to nd the right wiring diagram. The standard rating of these contacts is 3A @ 240VAC or 6A @ 120VAC. Please do not exceed these ratings.

• Adjusting the DIP switches, located on the lower right corner of the circuit board, will change how the humidier handles automatic tank ushes. The humidier will completely drain and rell with fresh water after a predetermined number of “rell cycles”. Every time the unit replenishes the tank while producing steam is counted as one cycle. The table below shows how to set the DIP switches in order to make the unit ush the tank at different intervals. Every 30 cycles equals approximately 5 hours of operation.

NOTE : Cycles are cumulative across humidistat cycles. This means that if the humidistat satises when the counter is at 15 cycles, the count will resume from 15 upon a new call for humidity. After the number of cycles, as set by the DIP switches, the tank will drain and rell. If there is no call for humidity for 7 consecutive days, the tank will be drained and wait for future demand from the humidistat.

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20. Installing and connecting the humidistat

See wiring diagrams in section 21 for proper connection. If you are using a COMFORTSTEAM electronic humidistat with outdoor sensor please refer to the instructions included with the humidistat. If you decide to use a standard mechanical humidistat, connect the mechanical humidistat between the terminals marked GND (ground) & IN (input) on the humidier electronic board.

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21. Start-up and test procedure

Take the 5/16 dia. plastic tube previously uncoiled and push one end on the connector located at the bottom of the overow pan. Please see Fig. 18a and Fig.18b.

Figure 18a Figure 18b

• Install the overow pan under the tank by sliding it on its holding screws. You don’t have to tighten the screws.

• Reconnect the white wire for the overow sensor on the water pan.

• Cut the two drain tubes and insert them in the rigid pipe. Note that the main silicon drain tube must have a minimum length

of 18” below the bottom of the unit to allow the siphon to work properly. It is important to leave an air gap between the soft tubes and the rigid pipe.

• Turn the handle of the water supply valve (fully counter-clockwise) to bring water to the humidier and let the water pressure

enter the system.

• Follow the water supply path completely and carefully check for leaks at the ttings.

• Turn the breaker “ON” to supply power to the humidier. The green light comes ON to conrm that the unit is ready to work.

• Test of the On/Standby button. Press the white button once. The green light goes OFF then ashes, indicating that the unit is in

standby mode but still powered. Press the white button again and keep it depressed for 3 seconds to power the humidier. The green light will come ON, conrming that the unit is ready to work.

• Turn the humidistat clockwise past the middle of the scale to create a demand for humidity.

• The tank lls to the proper water level.

• The fan control starts the fan to move the air as the humidier starts boiling water and produces steam. If the fan cannot start,

the humidier suspends the ongoing operation. If the air pressure is insufcient, the unit will stop by itself. Please note that it may take a few minutes to bring the water to a boil. The steam exits the water tank through the steam outlet and steam hose.

• The steam moves through the hose to the diffuser and is released into the warm air duct where it mixes with the moving air. 20.13

As water evaporates in the tank, the electric valve opens as needed to maintain the proper water level.

• When the humidity reaches the desired level the humidier stops producing steam. The unit may drain periodically in order to

eliminate the residues and keep the tank as clean as possible. The humidier also drains after a certain number of boiling – rell cycles. If there is still a demand from the humidistat after draining, the tank rells and starts to produce steam again.

• When the humidistat is satised, the fan continues to run for a short period of time in order to eliminate the steam from the ducts.

• When everything is working ne, put the cover on the unit and attach it by turning the 1/4 turn latch to the right.

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Please don’t forget to leave this instruction manual with the customer.

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22. Wiring diagrams

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101 McNeill Rd. | Sanford, NC 27330

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