MH Series TM EVAPORATIVE HUMIDIFIER/COOLER Installation Manual 2544832-A
PROPRIETARY NOTICE This document and the information disclosed herein are proprietary data of WALTER MEIER LTD. Neither this document nor the information contained herein shall be reproduced used, or disclosed to others without the written authorization of WALTER MEIER LTD., except to the extent required for installation or maintenance of recipient’s equipment. All references to the NORTEC name should be taken as referring to WALTER MEIER LTD. LIABILITY NOTICE WALTER MEIER LTD.
TABLE OF CONTENTS Subject Page 10-00 INTRODUCTION 1. INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 GENERAL 2 1.2 NOTES ON THE INSTALLATION AND OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. SAFETY OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.
3. TAKING OUT OF SERVICE / DISPOSAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 3.1 TAKING OUT OF SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 3.2 DISPOSAL / RECYCLING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 4. PRODUCT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . .
10-00 INTRODUCTION 10-00 Page 1 2008-12-03
1. INTRODUCTION 1.1 GENERAL Thank you for purchasing the Nortec MH Adiabatic Air Humidifier. The Nortec MH Adiabatic Air Humidifier incorporates the latest technical advances and is designed to meet all recognized safety standards. Nevertheless, improper use of the Nortec MH Adiabatic Air Humidifier may result in danger to the user or third parties and/or damage of material assets.
Symbols used in this manual The catchword “CAUTION” designates notes in this installation and operating instructions that, if neglected, may cause damage and/or malfunction of the unit or other material assets. The catchword “WARNING” used in conjunction with the general caution symbol designates safety and danger notes in this installation and operating instructions that, if neglected, may cause injury to persons.
2. FOR YOUR SAFETY 2.1 SAFETY OVERVIEW General Every person working with the Nortec MH must have read and understood the installation and operating instructions before carrying out any work. Knowing and understanding the contents of the installation and operating instructions is a basic requirement for protecting all personnel against any kind of danger, to prevent faulty operation, and to operate the unit safely and correctly.
Danger that may arise from the unit Danger: Some components of the Nortec MH are mains powered. One may get in touch with live parts when the control unit or the distribution boxes are open. Touching live parts may cause severe injury or danger to life. Prevention: Before carrying out any work set the Nortec MH out of operation (switch off the unit, disconnect it from the mains and stop the water supply) and secure the unit against inadvertent power-up.
In case of danger If safe operation is no longer possible, then the Nortec MH should immediately be shut down and secured against accidental power-up. This can be the case under the following circumstances: • if the Nortec MH is damaged • if the Nortec MH is no longer operating correctly • if connections and/or piping are not sealed • if electrical cables are defective All persons working with the Nortec MH must report any alterations to the unit that may affect safety to the owner without delay.
3.2 PRODUCT DESIGNATION The product designation and the most important unit data are found on the rating plate: 3.
3.4 MHB Flow Model 3.4.1. MHB Flow Construction Model 1 2 3 4 5 6 7 8 9 Water connection on unit R 3/4 " (outside thread) Volume controlling valves (adjustable manually) Water tub Open drain 1.5” PVC (1.66” (42 mm) OD) Water hoses Spray bar cap with distribution pipes Humidification boxes Mist eliminator (for air speed above humidification boxes >3.8 m/s) (750 fpm) Control unit on/off Figure 1.
3.4.2. MHB Flow System Overview Figure 2. System Overview – MHB Flow Functional description The MHB Flow model provides On/Off control by means of the MHB control unit and an external On/Off humidistat. In case of a humidification/cooling request the supply valve opens and the water flows via the pressure reducing valve (accessory), the water filter (accessory) and the manually adjustable volume controlling valves to the distribution pipes above the humidification boxes.
3.5 MHTC Flow Model 3.5.1. MHTC Flow Construction Model 1 2 3 4 5 6 7 8 9 10 11 Water connection on unit R 3/4 " (outside thread) Volume controlling valves (adjustable manually) Step valves (1 to 3) Water tub Open drain (outside diameter 1.5" PVC (1.66" (42 mm) OD) Water hoses Spray bar cap with distribution pipes Humidification boxes Mist eliminator (for air speed above humidification boxes >750 fpm) (3.8 m/s) UV water treatment (option) MHTC Total Control Unit Figure 3.
3.5.2. MHTC Flow System Overview Figure 4. System Overview – MHTC Flow Functional description The MHTC Flow model provides multistep control by means of the MHTC Total Control unit and the step valves (1, 2 or 3 step valves depending on the humidifier capacity). The MHTC Total Control unit (for wall mounting) processes analog sensor/control signals and uses them to control the step valves.
3.6 MHB Reflow Model 3.6.1. MHB Reflow Construction Model 1 2 3 4 5 6 7 8 9 10 11 12 13 Water connection on unit R 3/4 " (outside thread) Level-controlled supply valve Circulation pump Overflow Drain Drain valve Volume controlling valves (adjustable manually) Water tub Water hoses Spray bar caps with distribution pipes Humidification boxes Mist eliminator (for air speed above humidification boxes >750 fpm) (3.8 m/s) MHB Control Unit Figure 5.
3.6.2. MHB Reflow System Overview Figure 6. System Overview – MHB Reflow Functional description The water tub is filled up to a preset upper level via the level-controlled supply valve. When the water level in the tub drops below a certain limit, the level-controlled supply valve opens until the upper limit is reached again. The pump is activated whenever the float is high and continues to operate for a preset time after the float level drops.
3.7 MHTC Reflow Model 3.7.1. MHTC Reflow Construction Model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Water connection on unit R 3/4 " (outside thread) Level-controlled supply valve Circulation pump Overflow Drain Drain valve Step valves (1 to 3) Volume controlling valves (adjustable manually) Water tub Water hoses Spray bar cap with distribution pipes Humidification boxes Mist eliminator (for air speed above humidification boxes >750 fpm) (3.8 m/s) UV water treatment (option) MHTC Total Control Unit Figure 7.
3.7.2. MHTC Reflow System Overview Figure 8. System Overview – MHTC Reflow Functional description The water tub is filled up to a preset upper level via the level-controlled supply valve. When the water level in the tub drops below a certain limit, the level-controlled supply valve opens until the upper limit is reached again. The MHTC Reflow model provides multistep control by means of the MHTC Total Control unit and the step valves (1, 2 or 3 step valves depending on the humidifier capacity).
In case of a humidification/cooling request, the circulation pump starts and one, two, or all three step valves open (depending on the request). The water flows via the manually adjustable volume controlling valves to the distribution pipes above the humidification boxes. The distribution pipes evenly supply the water to the entire surface of the humidification boxes where it flows down and humidifies the air flowing through the humidification boxes.
10-10 INSTALLATION 10-10 Page 17 2008-12-03
1. INSTALLATION 1.1 IMPORTANT NOTES ON THE MOUNTING AND INSTALLATION WORK Qualification of personnel All mounting and installation work must be carried out only by well qualified personnel authorized by the owner. It is the owner’s responsibility to verify proper qualification of the personnel. General note Strictly observe and comply with all information given in the present installation and operating instructions regarding the mounting of the unit and the installation of water and electricity.
1.2 UNIT MOUNTING 1.2.1. Note on the locating the unit Usually, the design and dimensioning of the ventilation duct/air handler as well as the location of the Nortec MH inside the duct are determined, recorded and specified when planning the entire system.
1.2.2. Mounting Process Figure 1. Mounting Process – Step 1 Align the water tub to the centre of the duct, then use a level check water tub to the duct lengthwise and crosswise. Shim the tank as required until it is level. Note: Install four self-tapping screws 1/4 UNC x 3/4" on each side of the tub to secure it in place.
Figure 2. Mounting Process – Step 2 Fix the cross beam “B” to the water tub using four hexagon socket screws 1/4 UNC x 1/2" and washers.
Figure 3. Mounting Process – Step 3 Hint: With close space conditions we recommend to install the EPDM sealing profile to the vertical supports before installing the supports. Please refer to step 7 for more information. Carefully mount the left “D” and the right vertical support “E” onto the threaded bolts of the water tank, then fix each support with four 1/4 UNC nuts and washers (do not overtighten the nuts).
Figure 4. Mounting Process – Step 4 Carefully mount the vertical intermediate support(s) “F” (number depending on the unit size) onto the threaded bolts of the water tub, then fix each support with two 1/4 UNC nuts and washers to the water tub (do not overtighten the nuts) and with a hexagon socket screw 1/4 UNC x 1/2" and a washer to the cross beam.
Figure 5. Mounting Process – Step 5 Fix the front bracket “G” to each vertical support using two hexagon socket screws 1/4 UNC x 1/2" and washers.
Figure 6. Mounting Process – Step 6 Fix one mounting bracket “H” to each vertical support and intermediate support using a hexagon socket screw 1/4 UNC x 1/2", a 1/4 UNC nut and a washer (see figure above). Important: With multiple intermediate supports all mounting brackets must be mounted to the supports on the same side. The mounting brackets fixed to the outermost supports must be mounted always outside (between duct wall and support) and point inward.
Figure 7. Mounting Process – Step 7 The air gap between the outermost vertical supports and the duct walls as well as between the front bracket and the duct ceiling must be sealed using EPDM sealing profile (accessory). Cut the EPDM sealing profiles to the desired length (channel height and channel width plus cm allowance). Fix the EPDM sealing profiles to the outermost vertical supports and to the front bracket using the clamping brackets and self-tapping screws #10 x 3/4" supplied.
Figure 8. Mounting Process – Step 8 Fix hydraulic unit to the water tub and the cross beam using four hexagon socket screws 1/4 UNC x 1/2" and washers. Important: Remove the closing plug “H” from the circulation pump inlet before mounting the hydraulic units MHB Reflow or MHTC Reflow.
Figure 9. Mounting Process – Step 9 Assemble the drains according to the corresponding figure above (the drains can be assembled for draining to the right or to the left) and fix it to the water tank using the mounting bracket provided.
Figure 10. Mounting Process – Step 10 Starting from the bottom, install the humidification boxes in each row: Hook the mounting clips of the boxes into the corresponding openings of the supports, then push the humidification box downwards until it comes to a stop (arrangement of the humidification boxes according to the installation drawing included in the delivery). NOTE: In systems with an air speed >925 fpm (4.
Figure 11. Mounting Process – Step 11 Only for units with mist eliminator: Hook the mounting brackets into corresponding openings of the vertical supports, then push the brackets downwards until it comes to a stop (if necessary use a rubber mallet). Note: arrangement of the mounting brackets according to the detail figures above and the installation drawing included in the delivery.
Figure 12. Mounting Process – Step 12 Only for units with mist eliminator: Starting from the bottom, install the mist eliminator in each row: Hook the mounting clips of the mist eliminator into the corresponding openings of the mounting brackets, then push the mist eliminator downwards until it comes to a stop. Note: arrangement of the mist eliminator according to the installation drawing included in the delivery.
Figure 13. Mounting Process – Step 13 Mounting the spray cap bars: Push the two tongues on the back side of the trickling hood underneath the frame sheet of the humidification box (see detail above), then pivot the spray cap bars downwards. The two brackets on the front side of the spray cap bar must engage in the frame (see detail above) of the humidification box. Note: arrangement of the spray cap bars according to the installation drawing included in the delivery.
10-20 PLUMBING & ELECTRICAL INSTALLATION 10-20 Page 33 2008-12-03
1.0 WATER INSTALLATION 1.1 OVERVIEW WATER INSTALLATION Figure 1. MHB Flow – Water Installation Figure 2.
Figure 3. MHB & MHTC Reflow – Water Installation 1.2 NOTES ON WATER INSTALLATION Water supply The water supply is to be carried out according to the figure found in this chapter and the applicable local regulations for water installations. The indicated connection specifications must be observed. • The installation of the shut-off valve, pressure reducing valve and a water filter should be made as close as possible to the unit.
Water drain The water drain is to be carried out according to the figure found in this chapter and the applicable local regulations for water installations. The indicated connection specifications must be observed. • Make sure the drain line is installed with a constant down-slope to the siphon of the building. • Make sure the drain pipe is correctly fixed and easily accessible for inspections and cleaning purposes. • The minimum inside diameter of the drain pipe of 1.5" (38.
1.3.2 Mounting the MH Control Unit Figure 5. Mounting the MH Control Unit 1. Fix the control panel to the wall using 4 x ¼” screws (not provided). 2. Connect the multi conductor control cables from the hydraulic unit to the corresponding terminals in the control unit according the appropriate wiring diagram. Important: all cables must be lead into the control unit via strain reliefs installed into the openings in the bottom of the control panel housing. 3.
1.3.3 Wiring Diagram Nortec MH Flow Figure 7.
1.3.4 Wiring Diagram Nortec MH Reflow Figure 8.
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10-30 OPERATION 10-30 Page 41 2008-12-03
1.0 OPERATION 1.1 PUTTING INTO OPERATION Proceed as follows when putting the Nortec MH into operation: • Examine the Nortec MH and installation for possible damage. Damaged devices or devices with damaged installation may present danger to human life or cause severe damage to material assets. Damaged units and/or units with damaged or faulty installation must not be operated. • • • • • • 1.
1.3 NOTES ON OPERATION During operation of the Nortec MH the humidification system has to be inspected weekly. On this occasion check the following: • the water for any leakage. • the humidifier and the other system components for correct fixing and any damage. • the electric installation for any damage. • unit models with MH control unit: Check operating information in display level and whether or not a warning or error message is present. If the inspection reveals any irregularities (e.g.
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10-40 MAINTENANCE & TROUBLESHOOTING 10-40 Page 45 2008-12-03
1.0 MAINTENANCE 1.1 IMPORTANT NOTES ON MAINTENANCE Qualification of personnel All maintenance work must be carried out only by well qualified and trained personnel authorized by the owner. It is the owner’s responsibility to verify proper qualification of the personnel. General note The instructions and details for maintenance work must be followed and upheld. Only the maintenance work described in this documentation may be carried out. Only use original Nortec spare parts to replace faulty parts.
In any case the Nortec MH is to be maintained at least twice annually. On units equipped with a MH control unit (MHTC Flow, and MHTC Reflow) the maintenance interval can be programmed. As soon as the maintenance time has elapsed, a maintenance message is displayed to draw your attention to the pending maintenance. To determine the maintenance interval time, the above described procedure can be used. 1.3 MAINTENANCE WORK Component Humidification boxes and mist eliminator boxes.
disinfectant. Water installation Check water the water hoses of the humidifier for cracks and correct fastening, replace defective hoses. Carefully clean the hoses with a combined detergent and disinfectant. Check water supply line for sealing and seal if necessary. Dismantle water filter (if present) and clean it. 10-40 Page 48 2008-12-03 Spray Bar Cap Dismantle the spray bar cap and check the holes in the water distribution pipes for mineral deposit.
1.4 DISMANTLING AND INSTALLATION WORKS 1.4.1 Dismantle and install the mist eliminator and humidification boxes. 1. Undo the hose clamps, then pull off the hoses from the connections on the spray bar caps. 2. Lift the spray bar caps on the water connection side and remove them to the front. 3. Starting from the top remove the mist eliminator boxes (push box upwards and remove it to the front). 4.
1.4.2 Dismantle and install the UV lamp (option) 1. Pull the retaining clip out to release the UV light plug. 2. Carefully lift the plug and pull the UV lamp out of the housing. 3. Remove glass tube to the top. 4. Clean glass tube outside and inside with a lint-free and soft cloth. The installation of the UV lamp follows the reverse dismantling order. CAUTION! When installing the UV lamp, make sure to hold the lamp until it is completely inserted.
1.5 RESETTING THE MAINTENANCE INDICATION When maintenance work has been completed the maintenance indication must be reset on the unit models flow MHTC Flow, and MHTC Reflow (yellow LED lights). For that purpose, please observe the information given in the separate operating instructions for the MH control unit. 2.0 TROUBLESHOOTING Important! Most operational malfunctions are not caused by faulty equipment but rather by improper installation or disregarding of planning guidelines.
Note: On units equipped with a MH control unit (MHTC Flow, MHB Reflow, and MHTC Reflow) malfunctions during operation are indicated by a corresponding event message in the display. For that purpose, please observe the information given in the separate operating instructions for the MH control unit. 2.2 NOTES ON FAULT ELIMINATION In order to eliminate faults, the Nortec MH must be set out of operation as described in this manual.
4.0 PRODUCT SPECIFICATIONS 4.1 TECHNICAL DATA Control Control supply charge Circulation pump supply voltage Control signals Control characteristics Control accuracy Max. admissible air speed above humidification boxes Water supply Water drain Admissible water supply pressure Admissible water temperature Water quality Pressure drop Admissible ambient temperature (Control unit) Admissible ambient humidity (Control unit) Degree of protection of Control unit Degree of protection of pump, valves, etc.
4.2 UNIT DIMENSIONS UH: 25.4…120.0 (645…3045) (Increments of 2.95”) UW: 23.8…118.3 (604…3004) (Increments of 3.94”) UD: Max. humidification efficiency 85% 85% 85% 95% 95% 95% UA: Depth Humidification box 8” (200 mm) 8” (200 mm) 8” (200 mm) 12” (300 mm) 12” (300 mm) 12” (300 mm) MHB / MHTC Flow 3.8” (97 mm) MHB / MHTC Reflow 5.9” (131 mm) 10-40 Page 54 2008-12-03 Depth Mist eliminator ---4” (100 mm) ---4” (100 mm) Depth UD 22.5” (573 mm) 22.5” (573 mm) 26.5 (673 mm) 26.5 (673 mm) 26.5 (673 mm) 30.
WARRANTY (1) WALTER MEIER INC. and/or WALTER MEIER LTD. (hereinafter collectively referred to as THE COMPANY), warrant for a period of two years after installation or 30 months from manufacturer’s ship date, whichever date is earlier, that THE COMPANY’s manufactured and assembled products, not otherwise expressly warranted (with the exception of the cylinder), are free from defects in material and workmanship.
U.S.A. Walter Meier (Climate USA) Inc. CANADA Walter Meier (Climate Canada) Ltd. 826 Proctor Avenue Ogdensburg, NY 13669 TEL: 1-866-NORTEC-1 EMAIL: northamerica.climate@waltermeier.com WEBSITE: www.humidity.
