User and Maintenance Manual for the Homeowner and Installation Instructions for the Contractor ACU-STEAM™ Humidifier by Thermolec ACU STEAM ! 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. April 2014 V2.
1. Warnings and Disclaimer – Installation Precautions and Recommendations 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 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.
Instructions and User Manual for the Homeowner View of the unit 2.1 External view of the humidifier. HOME OWNER 2. ACU Fig. 2a STEAM ! 2.2 Water Tank Top View. Please see Fig. 2b. 2.3 Water tank Side View. Please see Fig. 2c. 6QR 8KGY Fig. 2b /CPWCN 6JGTOCN %WVÄ1WV * 9CVGT .GXGN 5GPUQTU 'NGEVTKE 8CNXG * 5VGCO 1WVNGV *GCVKPI 'NGOGPV 6CPM %QXGT *Acu-15 model has two steam outlets 6CPM .CVEJ +PVGTPCN &TCKP 1WVNGV (CEVQT[ KPUVCNNGF YKVJ JQUG 9CVGT 6CPM Fig.
Startup 3.1 The startup of the humidifier is done as follows : Adjust the knob on the humidistat to the humidity level (percentage) desired. Confirm that the water supply valve is open. 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. Working Principle : 3.
4. How to Control the Humidity HOME OWNER 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.
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.
HOME OWNER ! Warning Red light ON An abnormal condition occurred. Please refer to the error code table in Section 7. Steam White light ON The humidifier is heating water to produce steam. Filling cycle Blue light ON The electric water valve is open thus filling the humidifier. Draining cycle Yellow light ON The humidifier is in draining mode. White button Not active on residential models.
6. What To Do if a Malfunction Occurs 6.1 Shut the main power OFF and restart the humidifier to see if the error code (flashing red light) disappears. 6.3 Please refer to the error code table to identify the possible cause of the malfunction and the actions that you can take. 6.4 Should the problem persist, please call your service company for they are the best qualified to help you. Describe the problem to them and mention the error code you observed on the front panel.
8. Maintenance WARNING : The water tank and its contents can become extremely hot. Please be careful before proceding. HOME OWNER 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 components are operating properly. 8.
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. 8.
HOME OWNER 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 Put the cover back on the humidifier and lock it with the quarter-turn screw. 8.13 When finished, turn the main power back “ON”.
9. Preventative Maintenance 9.2 To prepare for the Summer Season Perform a complete maintenance as described in section 8 Shut the main power OFF Close the water supply valve Dry the inside of the tank Page 11 HOME OWNER 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.
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. HOME OWNER 10.
Detailed Instructions for the Contractor 11. Unpacking the Unit 11.1 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 I.D.
12. Dimensions and Available Models 12.1 Humidifier dimensions Fig. 12a 11 5/8” ACU STEAM 14” ! CONTRACTOR 9” 13” 12.2 Fig. 12b Available models Model Acu-5 Acu-10 Acu-15 Capacity Lbs/Hr (Kg/Hr) 4.8 (2.2) 9.6 (4.4) 12.8 (5.9) Power (Kw) Voltage (V) Current (A) 1.5 120 12.5 3 240 12.5 4 240 16.
Detailed View and Wiring Fig. 13a View of the top of the unit. Black Electric Valve Steam Outlet Heating Element Black Acu-15 model has two steam outlets High Level Low Level CONTRACTOR 13.
White Yellow Red Red Blue Blue Green View and list of the wire harness by color and function. Please see Fig. 13b & Fig. 13c.
Note: Please read sections 14 and 15 before proceeding. 14. Installing the Steam Diffuser and the Steam Hose 14.1 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 make 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.
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 30º away from the airflow to avoid condensation forming at the top of the duct. Please see Fig. 14e. Air flow UP 14.3 Fig. 14e Install one end of the steam hose onto the steam diffuser using a hose clamp and tighten it. CONTRACTOR 14.
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.
15.5 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, 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.
16. Installing the Water Supply and drain pan connections Important Notes : Close the main water supply valve before beginning. 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.
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 Fig. 16d 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. CONTRACTOR 16.4 Reconnect the white wire for the overflow sensor on the overlow pan. 16.5 Cut the two drain tubes and insert them in the rigid pipe.
17 Installing the Air Pressure Probe 17.1 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 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.
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.
19. Installing and Connecting to a Humidistat CONTRACTOR 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).
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.
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. Please don’t forget to leave this instruction manual with the customer. CONTRACTOR 20.
24VAC F2 FAN CIRCUIT HE N L2 L1 NO R R K1 COM K2 COM CONTROL FUSE NO GREEN GREEN GND G NEUTRAL CIRCUIT DE VENTILATEUR 120/240VAC RED RED BLUE BLUE GREEN HUMIDISTAT IN GND STANDARD HUMIDISTAT OPTION TRANSFORMER FAN WHITE H-STAT A G 24 IN STEAM HUMIDIFIER CONTROLLER 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 BLUE BLUE MODE A A HLS RED RED ELECTRIC WATER VALVE 24VDC GREEN S-15 ACU-STEAM HUMIDISTAT OPTION LLS V1 ACU-STEAM ROOM OR HSTAT 24V YELLOW CONTRACTOR GND Page 28 S
Page 29 24VAC F2 NEUTRAL CIRCUIT DE VENTILATEUR FAN CIRCUIT HE N NO NO R R GREEN CONTROL FUSE K1 COM K2 COM RED RED BLUE BLUE GREEN HUMIDISTAT IN GND STANDARD HUMIDISTAT OPTION TRANSFORMER MODE A A HLS RED RED ELECTRIC WATER VALVE 24VDC GREEN ACU-STEAM ROOM OR HSTAT S-15 ACU-STEAM HUMIDISTAT OPTION WHITE H-STAT A G 24 IN LLS V1 YELLOW CONTRACTOR FAN STEAM HUMIDIFIER CONTROLLER 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 24V GND BLUE BLUE GND GREEN ST1 L G COM ODR 120
Page 30 CONTRACTOR
Page 31 After pushing on the Turn power off. This is a serious condition and thermal cut-out button, will likely require assistance from a service automatic reset when technician. Call 1-800-336-9130. switching main power ON The high temperature cut-out has tripped. The humidifier immediately suspends the ongoing operation. Heating elements and supply valve are switched off. The power green light is blinking. Temperature inside the tank exceeded the high temperature cut-out setting.
