Instruction Manual V2.2
Contents
1. Ground connection UA il 20 On Standby LED L _ On Standby ped Qn O Switch iiid Fan LED Neutral 3L Alarm LED connection Steam LED Transformer Fan ij LE LI mu Rey ON JON 5900090 L Drain LED IN FAN H STAT A DIP switch to adjust the Connect the fan control dry contact so that it will start the fan tank flush interval when there is a demand from the humidistat The dry contact is rated at 3 amps 240 VAC The built in air flow switch is factory wired to these terminals Connect the humidistat supplied with the humidifier to the control board according to the wiring diagram supplied The alarm function is not available on residential models Fig 13b tc lt 2 Description of Wire Harness Color Grounds the electronic board to the tank for the level sensors Blue Blue Powers the electric valve with Pair 24 VDC Overheat signal Pair White Reads the low water level Yellow Reads the high water level Fig 13c Page 16 Note Please read sections 14 and 15 before proceeding 14 Installing the Steam Diffuser and the Steam Hose 14 14 Proper installation of the diffuser and steam hose is critical for the trouble free operation of the humidifier Please find an accessible location on the duct and m2. 17 5 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 humidifier for a warm air installation or connect the plastic tube to the LOW barbed connector on the PD Switch located below the electronic control board for a cold air return installation of the probe Please see Fig 17c This end is connected to PD Switch HIGH warm air LOW cold air Fig 17c Page 23 CONTRACTOR tc lt 2 18 Making Electrical Connections NOTE All internal wiring is done at the factory All external wiring shall be done by a qualified electrician and must conform to procedures regulations and local codes 18 1 A dedicated breaker in the main panel or fused disconnect must be installed 18 2 Ensure that the wire size and protection equipment conform to the sizes required by the Electrical Code 18 3 Wire according to the wiring diagram supplied in the cover of the unit 18 4 Starting the fan is mandatory with this type of humidifier The electronic controller board has a control 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 relay that starts the furnace fan motor Please refer to the furnace instruction manual to find the right wiring diagram The standard rating of these contacts is 3A 240V
3. 16 6 Open the water supply valve fully counter clockwise to bring water to the humidifier and let the water pressure enter the system 16 7 Follow the water supply path completely and carefully check for leaks at the fittings tc lt Z 22 17 Installing the Air Pressure Probe 17 1 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 humidifier 17 2 The probe can be installed in either the warm air or cold air return duct as close as possible to the humidifier but before the steam diffuser A 48 long plastic tube is supplied to connect the pressure probe to the humidifier 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 17 3 Drill a hole 3 8 dia in an accessible location in the air duct 17 4 Insert the probe and fasten it s base to the duct using two sheet metal screws The arrow visible on the probe flange indicates the air flow direction in the duct i e the curved end of the probe has to face the air flow Please see Fig 17a and Fig 17b Warm Air Duct Air Pressure On _ c Air flow 2 Cold Air Duct ZE Air flow Fig 17b
4. 8 Other known benefits of whole house water conditioners softeners are improved operation and longevity of plumbing appliances and fixtures 1 2 This humidifier 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 will not cause any damage to the property Make sure all water connections are properly installed or a water leak could occur 1 3 This humidifier is intended for use on ducted forced air furnaces and heat pumps 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 1 4 Do not install a humidifier where the surrounding temperature may be 32 F 0 C or colder Freezing water will damage the humidifier 8 Do not install the humidifier directly on the furnace housing 6 Always check that you are not about to cut or drill into an air conditioning coil or electrical accessory during installation 1 7 Do not install a humidifier if the city water pressure exceeds 90 psi Check the local codes related to pressure reduction 1 8 Do not install the diffuser in the supply duct if the pressure exceeds 0 5 Water Column 0 125 kPa 1 9 The installation wiring and plumbing of the humidifier must comply with national and local electrical plumbing and building codes 1 10 Electrical wiring and water tubes must not come in contact with sharp edges or hot surfaces 1 11 Make certain a
5. White Wire Main drain E 2 Pull 1 Lift P s Overflow Sensor Overflow Pan Overflow Tube Rigid Drain Pipe Fig 8a Page 8 8 5 Pull the plastic tube attached to the bottom of the overflow pan 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 overflow pan from the unit by lifting the front of the pan off the screw and pulling it towards you slightly loosen the front screw if nescessary Please see Fig 8a Also remove the main drain tube from the rigid drain pipe attached to the wall and check that both tubes are clean and clear from deposits 8 6 CAUTION Check that the water tank is not too hot to handle Unfasten the latch around the water tank and remove the tank bottom from the main body of the tank vessel by pulling it down carefully in a twisting motion Reminder there should be a small amount of water in the tank After you remove the tank clean the round o ring gasket but don t discard it NOTE This round gasket is mandatory and the tank will not seal properly without it likely resulting in a water leak ER IN WN 8 7 There will be varying degrees of scale on the tank bottom sidewalls and interal components which is a normal byproduct of boiling water containing minerals Simply discard the scale from the bottom of the tank leaving the scale on the tank sidewalls and elements it will not adversely affe
6. see Fig 15 a for necessary clearances around the humidifier WARNING Never install the humidifier directly on the furnace cabinet as this could void your furnace warranty ACU STEAM 12 CONTRACTOR tc lt 2 15 5 drain pipe has to be installed under the unit and connected the main house drain We recommend a 1 minimum 1 0 tube or standard 1 1 2 1 0 ABS plumbing tube to do the installation Please also install a siphon P trap with a drain cap if required The two flexible tubes main drain and overflow coming from the humidifier and which will be inserted in the rigid pipe require a minimum free vertical length of 18 below the cabinet It is very important to leave an air gap between the rigid pipe and the tubes to allow the siphon to function properly The flexible tubes cannot touch any water contained in the drain pipe Please see Fig 15b _ Water Hammer Absorber ACU STEAM 0000000 0 00 0 OQ OO O0 O O O Min length 18 Min len Warning These two tubes ca
7. 2 min Upto 5sec Up to 12min Up to 20 sec Up to 9 minutes total for drain cycle 1 Steam cycle see below The unit will repeat this cycle until the humidistat is satisfied or the selected number of cycles is reached before going to the draining cycle If there is no more demand for humidity the unit will automatically go on ready mode until the next demand If there is no demand for 7 days the unit will flush and drain the tank Page 26 NOTE The Acu Steam board has a memory that remembers the last sequence of operation when the power is turned off hence the unit might start at step 2 or 3 when you put the power back on Also timings may slightly vary depending on the capacity of the unit 1 5 kW 3 kW or 4 kW the pressure of the water inlet and the quality of the water 20 12 Please don t forget to leave this instruction manual with the customer Page 27 CONTRACTOR STAGOW WOSN3SuOOdlnO 91 5 AVHHUN d IWISIGQIINH LONG YOWOOY 5 JN3NJHOSNLIV3H 3H WOSN3SQOOH Sd WJAWOJSNVHL DAN JNWAOmIOJH IA WOSN3ST3AJIHOH SH WOSN3STAAJIMOl STI MWH3HLOLAVIdHd DDVH a AvIdHONLUVH3dO HOLMS WIHIN3U3dJK 390553994 Ad 1nOdfnO 3S3H WANWYN W TOd ONLIV H3dO 380338 SNOLLONYLSNI NOLIV TIVISNI ATIC1H3VO vad 53000 SPLITS NNOLIVN S THOT OL 3ONVQHOCOV NI FUM qNVISOdAI W
8. AC or 6A 9 120VAC Please do not exceed these ratings 18 5 Adjusting the DIP switches located on the lower right corner of the circuit board see Fig 18a will change how the humidifier determines automatic tank flushes The humidifier will completely drain and refill with fresh water after a set number of refill 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 flush the tank at different intervals To keep deposits in the tank to a minimum by default the tank will flush every 30 cycles which equals approximately 5 hours of operation NOTE The total cycles are cumulative across humidistat cycles This means that if the humidistat satisfies 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 refill If there is no call for humidity for 7 consecutive days the tank will be drained and wait for future demand from the humidistat Cycle selection for the DIP switch settings should be based on water hardness conditions as stated in the chart below Depending on the water quality the unit may drain more frequently that the DIP switch setting Switch numbers on DIP switch Cycles Before Tank Flush Water Hardness Soft 0 60 mg L Moderate 60 120 mg L OF OFF X 60 Hardi20 180mg 30 DEFAUL
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10. T Very Hard 180 mg L 959 KA Drain LED G PUV IN FAN H STAT A Li DIP switch Fig 18a Page 24 19 Installing and Connecting to a Humidistat 19 1 See wiring diagrams in section 21 for proper connection When using an ACU STEAM electronic humidistat with outdoor sensor please refer to the instructions included with the humidistat see page 4 sections 4 1 through 4 5 explain the functions of the Acu Steam wall and duct humidistats If you decide to use a standard mechanical humidistat by others connect the mechanical humidistat between the terminals marked GND ground amp IN input on the humidifier electronic board Page 25 CONTRACTOR 20 Start up and Test Procedure 20 1 Turn the breaker ON to supply power to the humidifier The green light comes ON to confirm that the unit is ready to work 20 2 Test of the On Standby button Press the white button once The green light goes OFF then flashes 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 humidifier The green light will come ON confirming that the unit is ready to work 20 3 Turn the humidistat clockwise past the middle of the scale to create a demand for humidity 20 4 tank fills to the proper water level 20 5 The fan control starts the fan
11. User and Maintenance Manual for the Homeowner and Installation Instructions for the Contractor ACU STEAM Humidifier by Thermolec ACU STEAM 5 gt O Q OQ 0 0 Please read this manual carefully before beginning installation Important Notice to the Contractor Once the installation is complete please leave this manual with the customer for future reference October 2014 V2 2 1 Warnings and Disclaimer Installation Precautions and Recommendations Please read and understand the warnings and provided instructions fully before you begin this installation and keep them handy 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 recommendations 1 1 Water quality and hardness can significantly affect the maintenance frequency of your Acu Steam humidifier If the cold water supply exceeds 180 mg L the water is classified as hard and excessive scaling inside the tank reservoir is possible If the water supply exceeds 180 mg L a water conditioner softner is recommended to minimize the maintenance frequency see section
12. a few minutes to bring the water to a boil The steam exits the water tank through the steam hose moves through the steam diffuser installed in the warm air duct and is released into the duct where it mixes with the moving air 3 7 As water evaporates the electric valve opens as needed to replenish the water in the tank 3 8 When the humidity reaches the desired level the humidifier stops producing steam In order to remove scale and keep the tank as clean as possible the humidifier drains after a certain number of steam producing cycles see section 18 5 page 24 of install manual for more details If there is still a demand from the humidistat after draining the tank refills and starts to produce steam again This process is part of the self cleaning feature 3 9 When the humidistat is satisfied 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 Page 3 z I 4 How to Control the Humidity 4 1 Humidity level and comfort are personal matters but it is generally acknowledged that a Relative Humidity of 35 45 is desirable However you should take the outside temperature into consideration before setting the humidity level in order to avoid condensation on the windows Usually a narrow strip of condensation around or at the bottom of the window is considered as normal 4 2 If y
13. ake sure you have a minimum length of 35 of straight duct downstream without elbows or other obstructions on which the steam could condensate to allow the steam to disperse easily into the airflow 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 14a For a vertical duct make the 1 1 8 hole in the middle of the duct Please see Fig 14b Note For High Velocity systems the diffuser should be installed in the RETURN and not the warm air duct W 9 Air flow Air flow Fig 14a HORIZONTAL DUCT Fig 14b VERTICAL DUCT 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 14 2 Insert 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 14c Fig 14d 6 to 12 _____ Note Acu 15 models are supplied with two diffusers hoses and clamps if there are dual ducts install one diffuser in each duct with equal lenth of hose on each When installing in the same duct keep a distance of 6 to 12 between diffusers Please see Fig 14d Fig 14c Pa
14. an tank SS siphon tube and silicon drain tube if necessary Check if the FF motoris running If not turn FF to continuous operation Check fbw sensor pitot tube in duct for blockage then make Sure plastic tube is connected properly from fbw sensor to PD switch under PC board in unit see manual Change furnace fiter if needed Turn power off This is a serious condition and will likely require assistance from a service technician Call 1 800 336 9130 Automatic Reset when Overfbw pan dries Up Automatic Reset when switching main power ON Automatic R eset after 5 min or after switching power off and on Automatic Reset when switching main power ON Automatic Reset when error conditions disappear After pushing on the thermal cut out button automatic reset when switching main power ON Legend SS stainless steel FF furnace fan SW supply water HLS high level sensor LLS low level sensor Page 7 ER N WN I 8 Maintenance WARNING The water tank and its contents can become extremely hot Please be careful before proceding As with any evaporative water device some minerals normally dissolve in the tank water will create varying degrees of deposits inside the tank Even though the unit drains and cleans itself during normal operation it will require a minimum annual maintenance check see sections 8 5 through 8 8 to assure all humidifier functions and component
15. ct the operation of the unit Clean the scale from the bottoms of the stainless steel water discharge and water supply tubes using vinegar or a cleaning product designed to remove scale lime or calcium to enable unresricted water flow If scale is excessive affecting the flow of water replace the drain tube and sensors when necessary normally every 2 4 years these replacement parts are included in a maintenance kit available from your installing contractor DO NOT use any acids when cleaning your Acu Steam humidifier 2 I 8 8 Once completed reinstall the o ring gasket around the bottom tank collar Please see Fig 8b Align the two arrows located at the front of the tank and the fixed part while lifting the tank in place Please see Fig 8c Apply even pressure to secure the tank properly in the tank cover Then close the latch holding the tank in position The clamp should close with minimal pressure Verify that the o ring gasket and tank are seated properly by checking for leaks when re starting the humidifier Fig 8b Page 9 8 9 Put the overflow pan under the tank by sliding the slot on the back screw and hooking the key hole on the front screw 8 10 Reconnect the white wire of the overflow sensor on the overflow pan 8 11 Put the overflow and main drain tubes back into the rigid drain pipe 8 12 Putthe cover back on the humidifier and lock it with the quarter turn screw 8 13 When finished turn the mai
16. cycle The red light indicates a warning and reproduces the same warning code as the red light on the humidifier control panel If ever the red light is lit or flashing on the humidistat you know immediately that the humidifier needs attention Display Status Description On Standby Green light OFF The humidifier has no power Breaker is OFF 5 Blinking The humidifier has power but is in standby mode ON The humidifier has power and is functional White button Press to put the humidifier in standby mode The green light is blinking Press and keep depressed 3 seconds to power or reset the humidifier The green light is ON Fan White light ON The fan control is activated Page 5 ER N WN ER WN I Warning light Steam White light Filling cycle 54 Blue light Draining cycle Yellow light White button ON ON ON ON An abnormal condition occurred Please refer to the error code table in Section 7 The humidifier is heating water to produce steam The electric water valve is open thus filling the humidifier The humidifier is in draining mode Not active on residential models Page 6 6 What To Do if a Malfunction Occurs 6 1 disappears 6 2 located near the humidifier 6 3 you can take 6 4 6 5 Should the problem persist please call your service company for they are the best qual
17. e recommend installing a strainer in the water line to protect the solenoid valve See section 1 1 for additional information and recommendations concerning water quality 16 1 At the end of the water hammer absorber connect the water supply tube using the same type of fitting 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 16a NOTE The brass sleeve supplied in kit 10S is to be used only if the plastic supply tube is replaced by a copper tube Either system works with this humidifier but only plastic tubing is supplied Fig 16a Keep the supply valve closed for now you will open it during the start up procedure 16 2 Take the 5 16 dia plastic tube and push one end on the connector located at the bottom of the overflow pan Please see Fig 16b and Fig 16c Fig 16c 16 3 Install the overflow pan under the tank by sliding the slot on the back screw and hooking the key hole on the front screw Please don t tighten the screws 16 4 Reconnect the white wire for the overflow sensor on the overlow pan Page 21 CONTRACTOR 16 5 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 to allow the siphon to work properly It is important to leave an air gap between the soft tubes and the rigid pipe
18. ge 17 CONTRACTOR IMPORTANT For horizontal ducts that are only 8 to 10 inch high install the diffuser at the very bottom of the duct with only the top two screws and rotate approximately 30 away from the airflow to avoid condensation forming at the top of the duct Please see Fig 14e Air flow 14 3 Install one end of the steam hose onto the steam diffuser using a hose clamp and tighten it 14 4 After installing the humidifier Section 15 use the second supplied hose clamp to install the other end of the steam hose 4 feet long 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 humidifier top steam outlet fitting The steam must flow without obstruction WARNING Do not let the hose sag when it is connected to the duct Please see Fig 14f A sufficient slope with no horizontal section is mandatory to allow any condensation to flow back naturally to the water tank Please see Fig 14g If condensation water accumulates in the hose the steam will not be able to escape normally through the diffuser and will lead to a malfunction of the humidifier Please keep in mind that the hose will soften when heated and will have a tendency to sag Warm air duct Warm air duct Continuous slope without sagging is MANDATORY x Cut hose to the shortest length
19. ified to help you Describe the problem to them and mention the error code you observed on the front panel They may be able to help you solve the problem over the phone If not they can call our technical service department 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 T Description of Error Codes Number of flashes of the red light Error Description Humidifier Status Actions to be Taken by the Technician Shut the main power OFF and restart the humidifier to see if the error code flashing red light If you see a water leak follow the water supply tube and close the valve installed on the water pipe Please refer to the error code table to identify the possible cause of the malfunction and the actions that ER N WN HOME O Countinuous The fbod sensor under the tank senses water in the pan The two water level sensors are miswired or do not read the water level properly supply valve was open for more than 6 minutes Inadequate drainage The tank did not drain or the draining cycle is too long The air pressure switch does not detect enough air pressure OR the high limit HSTAT optional senses extremely high humidity in the duct Temperature inside the tank exceeded the high temperature cut out setting Inadequate water supply The Humidifer immediately suspend
20. ig 2c Water Level Sensors Electric Valve Steam Outlet Acu 15 model has two steam outlets L Water Tank Fig 2c Internal Drain Outlet Factory installed with hose Page 2 3 Startup 3 1 The startup of the humidifier is done as follows e Adjust the knob on the humidistat to the humidity level percentage desired e Confirm that the water supply valve is open e Put the main power ON at the electrical panel The green pilot light comes ON on the LED panel The humidifier is ready to work R Working Principle E N WN 3 2 Unlike other types of humidifiers which produce humidity by passing warm air through a moist pad Acu Steam produces humidity from steam dispersed directly into the supply duct 3 3 Ahumidistat installed either on the wall or the air return duct controls the unit You set the knob of the humidistat according to your desired level of humidity 35 4596 recommended Please read the next section about the Acu Steam humidity control 2 I 3 4 When the humidistat senses a need for humidity it starts the humidification process 3 5 The tank fills with water 3 6 The electronic control starts the blower fan in the furnace to move the air as the humidifier starts boiling water and producing steam If the fan cannot start i e there is no air movement to transport the steam or insufficient air pressure the humidifier stops itself Please note that it may take
21. iring diagrams 21 1 1 1 I 1 1 1 i 1 eNe INV3LS SIVIELCITIIOLIOS 9 S v YNALWILINAA LIND LINDYD YOLOVYELNOD Page 28 YOLOVYELNOOD WISH YO WOO 5 B 50 UNE TLNSA Gs O ie cen Iw x pH LINDY NV 1 bese Q vol TAGOW ag asel tasted oq 1 1 i T 1 d WIE OE S EUN s N9V IEEE ERI MEME EN ru M Y NOLLdO IVISIIINDHIAVIISTOV NOLLdO bod JVILSKIIADH QUVONVILS ttt YOSNSS HOOMINO 95 pro NOLDANNODGNNOYD Nd ME bd NIYIN Y EM bd JVISKIWOH IOndSOWOOH JVISH ME IN3NJHONUVSH 3H bd MWOSN3SQOOH Sd bd MJAHOJSNVHL 1 bd 3ANAOMMID3I TA MOSNJSH AHIHOH bd WOSN3SHAHIMOT 5 MATBHLOLAVIHd DDVS AVHHSNuVH3dO Di HOLMS MhHINgH34dKidunSS3Hd 5904 200 170 19599 WONVW W davoga EUM O QN3931 ONUYY3dO CNV SNTHIM 330339 YAISIGINNH WALS 5 NOLIV TIVISNI ATIDH3HVO QV3H 53000 yL NNOLINN S IVDO TOL 3ONNCTHODOV FUM INVLYOdNI O SLIVICLCITIOLOS 9 Page 29 YOLOVYELNOD Page 30 Detailed Error Codes 22 YOLOVYELN
22. long NOTE The electronic humidistat and the outdoor reset sensor are optional The humidistat can be either wall type RH or duct type DH 11 2 Water Tank Detailed View Please see Fig 11a Top View Manual Thermal Cut Out Electric Valve CONTRACTOR Tank Cover Acu 15 model has two steam outlets Fig 11a Internal Drain Outlet Water Tank Factory installed with hose Page 13 12 Dimensions and Available Models 12 4 Humidifier dimensions Fig 12a v ACU STEAM 12 2 Available models Fig 12b Capacity Model Lbs Hr Power Voltage Current Kg Hr Kw A a tc lt 2 V 4 8 2 2 1 5 120 9 6 10 4 4 3 240 i 12 8 15 2 14 13 Detailed View and Wiring View of the top of the unit Fig 13a Black Electric Steam Outlet Heating Element Black Acu 15 model has two steam outlets Yellow Thermal White Cut out Blue Blue Red Red Overflow Pan Page 15 CONTRACTOR View and list of the wire harness by color and function Please see Fig 13b amp Fig 13c c mo SS 88 5 mm ccr gt Overflow Sensor
23. n appropriate drain system is installed and there is no resistance to the flow of the discharged water 1 12 not set the humidity level higher than that recommended or condensation damage could occur 1 13 Please beware of sharp edges when you cut into a metal duct 1 14 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 1 15 Caution when you perform maintenance please be careful because the unit can be extremely hot Always allow enough time for the unit to cool down 1 16 To prevent electric shock or injuries never operate the humidifier without the covers as there are high voltage and hot components inside 1 17 This humidifier will only work with non demineralized water The maximum water supply temperature is 86 F 30 C ER N WN CONTRACTOR Page 1 Instructions and User Manual for the Homeowner 2 View of the unit 2 1 External view of the humidifier Fig 2a ER 000000 Oooo 0080 ACU lt STEAM WN I 2 2 Water Tank Top View Please see Fig 2b 2 3 Water tank Side View Please see F
24. n power back ON ER WN I Page 10 9 Preventative Maintenance 9 1 In order to avoid problems due to accumulation of deposits we suggest that you replace the silicone drain tube and the low and high water level sensors every 2 to 4 years We also suggest you replace the round o ring gasket around the tank All these components are available in a kit Contact your service company for more information 9 2 To prepare for the Summer Season e Perform a complete maintenance as described in section 8 e Shut the main power OFF e Close the water supply valve e Dry the inside of the tank ER N WN 11 ER N WN 2 I 10 Warranty 10 1 Thermolec Ltd warrants against defects in materials and workmanship of the steam humidifier and all its components for a period of two 2 years from the date of installation An Extended Limited Warranty coverage applies to the following components 10 years on the element and 5 years on the tank 10 2 Any claim under warranty shall be considered only if the product has been properly installed by a certified technician and operated in accordance with Thermolec s written instructions 10 3 Any misuse of the steam humidifier or any repair by persons other than a certified technician carried out without Thermolec s written consent voids the warranty 10 4 All defective parts must be claimed within the warrant
25. nnot touch g water in the drain pipe Keep a minimum _ Keep this hose straight distance of 6 between the end of the For the correct operation of the tubes and any water in the drain pipe at all times Immersing the tubes in water will interfere with draining and affect the operation of the unit siphon this tube must have a minimum length of 18 An air gap is mandatory between the tubes and the rigid drain pipe Rigid pipe Mn 6 Minimum in _ Water Fig 15b 15 6 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 15 7 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 humidifier on the wall then install two screws at the bottom of the unit and tighten them partially 15 8 Level the unit and tighten the four screws firmly Page 20 16 Installing the Water Supply and drain pan connections Important Notes e Close the main water supply valve before beginning e We recommend installing a quarter of a turn shut off valve not supplied near the unit This supply valve not supplied must be attached to a cold water pipe only easily accessable from the Acu Steam unit Since the unit is draining hot water cold water is added to reduce the temperature before sending the water to the drain e In case of hard water or water containing particles w
26. ns unoccupied during the winter season set the humidistat to the minimum set point in order to prevent condensation Page 4 5 Functions of the Electronic Circuit 5 1 The electronic board located inside the unit controls all the humidifier functions The front LED panel is equipped with pilot lights indicating the status of the humidifier Please see Fig 5a Please refer to Article 5 2 for the description of the functions The red pilot light which is a warning light can either glow all the time or flash when activated In case of error the humidifier enters standby mode The flashing of the pilot lights indicates which error happened The error recognition sequence is as follows e The green pilot light near the power button blinks once e The red light flashes a certain number of times this is the error code e A pause with no light at all e Another blink of the green light once e Another series of flashing of the red light e And so on until the condition is reset or service is performed e 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 Mode On Standby Green Fan White Warning Red Steam White Fill Blue Drain Yellow Fig 5a 5 2 The ACU STEAM 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
27. ou installed an ACU STEAM humidistat and an outdoor sensor this adjustment will be done automatically through a function called outdoor reset The outdoor sensor automatically reduces the humidistat setting according to the outdoor temperature during cold days it does the opposite during mild days Please see Fig 4b 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 3596 RH Relative Humidity Note There are no numbers printed on the Humidistat itself 4 3 If you are using a humidistat by others the humidity adjustment according to the outside temperature might 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 4a gt AC UZS TEAM Outside Temprature Recommended Setting 22 F 30 C 15 13 F 25 C 20 4 F 20 C 25 5 F 1 Mis 3096 14 F 10 35 above 23 F 5 C 40 Fig 4a RH we Fig 4b 4 4 No matter which humidification system you are using please do not forget 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 4 5 If the house remai
28. possible even though 4 feet is supplied tc Z Min 12 WRONG Fig 14f Unit must be installed a minimum of 12 below the bottom of the duct ACU STEAM Warm air Duct IDEAL CORRECT Fig 14g Fig 14h 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 14h Page 18 15 Installing the Humidifier For ease of service keep a minimum space of 24 in front of the unit 15 1 Remove both covers by first turning the 1 4 turn screw to the left and swing open the tank cover and unhook it Then unscrew the two screws holding the electrical cover and pull it towards you 15 2 Remove the white wire connected on the water pan at the bottom of the unit This is the overflow sensor 15 3 Remove the overflow pan by lifting the front off its holding screw and pull towards you Do not remove those screws from the humidifier middle wall 15 4 The humidifier must be installed on a vertical flat surface i e wall or vertical furnace duct Because of the length of the steam hose supplied select the location of the unit as close as possible within a maximum of 4 feet of the diffuser Please
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30. s are operating properly 8 1 Drain the water from the tank Most of the time there will be water in the tank even when the humidifier is in standby mode since it only drains once per set amount of steam cycles see section 18 5 for drain cycle settings First turn down the humidistat to avoid a steam cycle Please note that when using an ACU STEAM electronic humidistat if the relative humidity is extremely low the humidifier may still run with the knob at the minimum setting because of a range limiter inside the cover If this occurs you will need to remove the humidistat cover by pulling it off and turning the knob completely counter clockwise The main power to the humidifier the breaker at the main panel not the power button on the unit needs to be turned off and then back on Once the power is reset the unit will start filling with water blue LED will light and keep filling until draining starts yellow LED This process can take a number of minutes Once draining has completed turn the main power off There should be approximately one inch of water in the tank Wait a few minutes or until the unit has cooled before proceeding with the following steps 8 2 After draining the tank TURN THE MAIN POWER OFF 8 3 Remove the cover by turning the 1 4 turn screw to the left 8 4 Unplug the white quick connect wire connected on the overflow pan at the bottom of the unit This wire is connected to the overflow sensor Please see Fig 8a
31. s the ongoing operation Heating elements and supply valve are switched off The power green light is blinking Humidifer attempts to operate then stops because of wrong information from water level sensors The power green light is blinking Humidifer immediately suspends the ongo ing operation Heating elements and supply valve are switched off The power green light is blinking Humidifer immediately suspends the ongoing operation Heating elements and supply valve are switched off The power green light is blinking Humidifer immediately suspends the ongoing operation The unit goes back to normal operation as soon as the error condition disappears The power green light is blinking The high temperature cut out has tripped The humidifer immediately suspends the ongoing operation Heating elements and supply valve are Switched off The power green light is blinking Turn power off Check for leaks around the tank clamp SW valve and drain tube Make sure tank arrows align and gasket is sealing properly Turn power off Clean or replace HLS or LLS water sensors Check for proper wiring of HLS and LLS sensors Turn power off Check SW valve circuit for 24V DC atthe valve Referto manual p 20 and check for proper drain installation Make sure SW shut off valve is open SW valve is responding and SW tube is clear of debris Turn power off Check for proper drain setup by referring to manual p 20 Check and cle
32. to move the air as the humidifier starts boiling water and produces steam If the fan cannot start the humidifier suspends the ongoing operation If the air pressure is insufficient 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 20 6 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 7 As water evaporates in the tank the electric valve opens as needed to maintain the proper water level 20 8 When the humidity reaches the desired level the humidifier stops producing steam In order to eliminate the residues and keep the tank as clean as possible the humidifier drains after a certain number of boiling refill cycles If there is still a demand from the humidistat after draining the tank refills and starts to produce steam again 20 9 When the humidistat is satisfied the fan continues to run for a short period of time in order to eliminate the steam from the ducts 20 10 When everything is working fine put both covers back on the unit and attach them with the two screws electrical cover and by turning the 1 4 turn latch to the right tank cover tc lt Z 20 11 Sequence of Operation On Cycle Power Draining Cycle Filling Boiling Cycle Upto 5sec Upto3min Upto 4min Up to 2 min Up to
33. y coverage period and shall be replaced at no charge transport included by Thermolec Thermolec does not cover the labor costs to execute the said repairs 10 5 Thermolec will not be held responsible for accidental or consequential damages nor for operational delays caused by the replacement of said steam humidifier Thermolec Ltd 2060 Lucien Thimens St Montreal QC H4R 1L1 Tel 514 336 9130 Fax 514 336 3270 Web site www thermolec com Help line for technical assistance during business hours Monday to Friday 8 30am to 5 00 pm Eastern Time 1 800 336 9130 Page 12 Detailed Instructions for the Contractor 11 Unpacking the Unit 11 4 Contents Please inspect the carton s contents and report any missing parts or damage immediately 1 ea Humidifier 1 ea Main siphon tube 32 long already installed and coiled inside the unit 1 ea Steam hose 4 feet long x 1 inch 2 ea Steam hoses for Acu 15 1 ea Steam diffuser 12 or 16 depending on the humidifier model 2x 16 diffuser for Acu 15 1 ea Instruction and maintenance manual 1 ea Pressure Differential Switch mounted inside cabinet 1 Plastic bag containing installation material and hardware as follows 2 ea Adjustable hose clips for the steam hose 4 clips for Acu 15 1 ea Small bag KIT 10S 1 ea Water supply tube 1 4 dia x 7 long 1 ea Overflow tube for the overflow pan 7 16 dia x 24 long 1 ea Pitot tube with plastic tube 5 16 dia X 48
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