Armstrong EHF-2 Installation And Maintenance Manual Download Page 12 | Manualshive

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Installation and Maintenance

EHU-600 Series Humidifiers

12

10. Wiring Diagram

Figure 12-1: EHU-600 Wiring Diagram

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Summary of Contents for EHF-2

Page 1: ...midifier to function to its full capability be certain to install in accordance with Armstrong recommendations These installation and maintenance guidelines should be used by experienced person nel as...

Page 2: ...Control humidistat 8 High limit duct humidistat 9 Fan interlock switch 10 Wiring diagrams 11 Capacity chart 12 Physical data 13 Submittal drawings C Principle of Operation Page 15 1 Operation 2 Sugge...

Page 3: ...applicable building plumbing and electrical codes 3 Site Selection See Fig 3 1 Electronic steam humidifiers should be installed in locations that allow routine inspection and accessibility for mainte...

Page 4: ...a wall by means of 3 8 diameter lag screws or other suitable fasteners capable of supporting the maximum operating weight of the humidifier Model EHU 600 Making sure the humidifier is level hold it ag...

Page 5: ...se only wire with copper conductors rated 90o C or higher for high voltage and grounding g Avoid running high voltage wire next to PC board Use bottom knockout for high voltage wire inlet 3 Water Fill...

Page 6: ...and type of steam dispersion tube has been selected See Chart 6 1 for proper dispersion tube lengths The standard dispersion tube has a built in slope to allow for gravity drainage of condensate back...

Page 7: ...city per Tube Figure 7 4 Disperson Tube Below Steam Outlet on Humidifier c Insert the dispersion tube into the duct so the holes face upward Never install the tube with the holes facing downward Faste...

Page 8: ...e 8 6 If the optional 10 ft flexible steam hose is used cut the steam hose to length as required Wipe out the inside of each hose end before installing Connect the cut end of the hose to the dispersio...

Page 9: ...mounted control humidistats Armstrong Part C1472 are also available for installation where sensing and control from return air or exhaust air ducts is preferable Mounting The Armstrong Control Humidis...

Page 10: ...e humidifier steam output at the proper modulated rate to maintain 40 RH The humidstat will send a 1 9 to 3 9 Vdc signal to the humidifier as the space humidity drops from 42 5 to 37 5 RH 2 5 RH throt...

Page 11: ...trong Part A9023 All Pressure and electrical connections and set point adjustments are on side for each installation Temperature limit 32 F to 180 F Maximum surge pressure 10 psig Rated pressure 45 H2...

Page 12: ...Installation and Maintenance EHU 600 Series Humidifiers 12 10 Wiring Diagram Figure 12 1 EHU 600 Wiring Diagram...

Page 13: ...7 4 8 45 17 7 7 20 9 1 23 10 5 30 13 7 35 16 50 22 8 55 25 60 27 3 69 31 4 86 39 2 36 3 5 8 50 19 8 7 22 10 26 11 8 33 15 38 17 3 55 25 61 27 8 66 30 77 35 96 43 7 42 0 8 6 60 22 10 26 11 8 30 13 7 38...

Page 14: ...ply Front 151 2 394 35 16 84 35 16 84 L Electrical Supply Side 31 8 80 2 51 2 51 M Electrical Supply Front 41 2 114 21 2 64 21 2 64 N Fan Height EHF 2 13 330 N A N A N A N A N Fan Height EHF 3 16 406...

Page 15: ...uce steam Fig 15 1 When the water level rises as shown in Fig 15 2 increased electrical current flows through the water producing more steam This increase will continue until the required output of st...

Page 16: ...HU 600 Series has a patented self regulating maximum output feature that eliminates manual adjustment and improves humidity control In low demand situations units with greater capacity can quickly ove...

Page 17: ...circuit shall provide automatic protection from excessive current and high water overflow k The humidifier fill water line s shall have an air gap to prevent backflow syphoning of contami nated water...

Page 18: ...the tank water After extended use repeated lighting of the Tank Full light indicates that in spite of periodic draining of mineral laden water the steam generator should be inspected and either clean...

Page 19: ...k See Figure 19 1 7 Disconnect the control wiring to terminals 3 and 23 High Limit Humidistat and terminals 2 and 24 Air Proving Switch then jumper them out with the tabs provided or a short piece of...

Page 20: ...y increasing the water s conductivity b If Tank Full light illuminates with water level below midway point in the tank the back pressure due to duct static or steam dispersion piping is too high Consu...

Page 21: ...verify that it is working Look at the tube mounting plate there is anArmstrong A Logo or UP sticker which should be pointing up If not the tube will not drain properly See Figure 21 1 22 When using EH...

Page 22: ...so this maintenance is required when you can least afford to perform it Hopefully understanding the problem and possible solutions will help avoid problems in the first place How water affects the EH...

Page 23: ...mineral accumulations from the water This is a bottom blowdown so if minerals stick to the sides of the steam generator they will accumulate The standard drain interval is every 30 minutes for the EHU...

Page 24: ...proper operation The water is too pure when the Tank Full light comes on excessively e Magnetic Treatment Magnetic coils designed to allow water to be magnetized have been found useful in some instanc...

Page 25: ...ution Muriatic acid can cause severe chemical burns if not handled properly Wear rubber gloves and eye protection when using Read and follow carefully the safety procedures on the package a Obtain sev...

Page 26: ...or tank Make sure all electrical connections are tight see Page 6 Check unit for proper operation 4 Electrode Installation Models EHU 601 and EHU 602 Three Phase a Clean the inside of the steam genera...

Page 27: ...crew as shown Tighten the nuts and screw A 7 16 socket on an extension makes this step and the next much easier and safer c Set the two flat washers in place as shown Then set the inner electrode in p...

Page 28: ...Figure 28 1 Model EHU 600 3 Phase Figure 28 2 Model EHU 600 1 Phase Model EHU 600 is shown above Models EHU 601 and EHU 602 are similar but some part numbers are different Parts Description 1 Hose Cla...

Page 29: ...nk This signals that the diagnostics routine has begun For the purpose of the diagnostic function the lights on the front panel of the humidifier correspond to assigned input and output circuits Note...

Page 30: ...dified or stat is mis wired or malfunctioning If All the lights are on then all controls are allowing the humidifier to fill In case of component malfunction consult your Armstrong Represen tative or...

Page 31: ...cker with Contactor cycles or B W G or without sensor or pigtail chatters Unit fills continuously G B W 5 demand lights flicker with Contactor chatters or without sensor or pigtail Unit will not fill...

Page 32: ...remedy with respect to the above limited warranty or with respect to any other claim relating to the products or to defects or any condition or use of the products supplied by Armstrong however cause...

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