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HUMIDI-TECH

TROUBLESHOOTING GUIDE

Note:

Probe rod corrosion or aging probe head material may cause level control system failure. This

generally does not occur in the first two years of operation.

PROBLEM

POSSIBLE CAUSE

RECOMMENDED ACTION

Humidifier does not
heat.

Incorrect or nonexistent supply

voltage to unit

Check main line safety switch.
Check main line fuses.
Check for proper supply voltage.

Incorrect or nonexistent control

voltage

Reset control transformer circuit breaker.

Check for 24 VAC control circuit voltage at T-1 and T-2 on the
control board.

Humidistat not calling

Set humidistat to call. Inspect for faulty humidistat.

Safety controls open

Check safety controls, airflow switch, and high limit humidistat.

Humidifier will not fill.

No water pressure at valve

Check water supply/shut-off valves.

Faulty water fill valve

Check for 24 volts at the fill valve.

Plugged strainer

Check strainer.

Plugged valve

Check valve.

Faulty control board

Verify control voltage across the fill valve output.

Humidifier does not
stop filling.

Lack of tank to probe electrical
continuity

Water conductivity must be 100 µS/cm or 34.2 mg

. Add salt to

the tank. If this does not solve the problem, consult factory for
further advice.

Fill valve stuck open

Check valve for foreign matter.

Drain valve not closed

Verify that lever on drain valve is in closed position.

Fill valve installed backward

Check for correct water flow through valve by noting arrow.

Autodrain mode

Humidifier may be in periodic drain and flush. Check controller
display.

Low output

Electric drain valve not seating

Correct the cause of leakage or replace valve.

Fill valve stuck open

Check valve for foreign matter.

Unit short-cycles

Controller cycle rate set too low

Adjust heater cycle time using the VAPOR-LOGIC

keypad

setup menu. See the VAPOR-LOGIC

manual if you need

more information.

Reduced or no output

even though water is

at the proper level

Heater malfunctioning

Verify that proper voltage is being applied to heaters. Check
heater amp draw and compare to wiring diagram ratings.

Malfunctioning control system

Replace heater contactor if not functioning. Verify auxiliary

limit controls (humidistat, airflow proving switch, etc.) and
reset, replace or calibrate as needed.

Troubleshooting guide for standard water models

VM99-C-0302-M-0302.pdf 24

11/19/2009 9:51:09 AM

Содержание HUMIDI-TECH

Страница 1: ...READ AND SAVE THESE INSTRUCTIONS HUMIDI TECH and HUMIDI TECH DI ELECTRIC STEAM HUMIDIFIERS Installation Operation and Maintenance Manual ...

Страница 2: ...res for both the HUMIDI TECH and HUMIDI TECH DI humidifiers DRI STEEM Humidifier Company General information Product overview 3 Dimensions 4 Electrical specifications capacities and weights 5 Installation Locating and mounting the humidifier 6 Piping 6 Wiring 9 Dispersion Using space distribution units SDU E and SDU I 11 Using dispersion tubes 14 Using a RAPID SORB dispersion assembly 16 Drip tee ...

Страница 3: ...aters Keyholes for wall mounting Water fill DN10 3 8 female DN40 or DN50 flexible vapor hose pipe or tubing connects to dispersion tube s or to an SDU Condensate return line Duct Electrical area Electrical conduit knockouts DN20 threaded skimmer port and overflow drain Water fill access hole Condensate return line Electrical area Removable evaporating chamber INCOLOY alloy sheathed immersion heate...

Страница 4: ...DN20 frame drain 57 mm DC 1167 13 mm hole in base for water fill line Power wire knockout Steam outlet 276 mm 57 mm Top view 614 mm Power wiring knockout Left side view Front view 614 mm 16 mm 19 mm 38 mm 146 mm Bottom view Control wiring knockout 50 mm 25 mm Control or SDU wiring knockout ...

Страница 5: ...perating weight kg Steam capacity kg h I max A Steam capacity kg h I max A VM 2 2 2 5 8 0 2 7 36 43 VM 4 4 5 0 16 0 5 4 8 7 36 43 VM 6 6 7 5 24 0 8 2 13 0 40 55 VM 8 8 10 0 31 9 10 9 17 3 40 55 VM 10 10 12 5 39 9 13 6 15 2 42 63 VM 12 12 15 0 47 9 16 3 17 3 42 63 VM 14 14 17 5 19 1 20 2 42 63 VM 16 16 20 0 21 8 23 1 42 63 VM 21 21 26 3 28 6 30 3 43 69 VM 25 25 31 3 34 0 36 1 43 69 VM 30 30 37 6 40...

Страница 6: ...sider the following when selecting the location of the humidifier Convenient access to duct Electrical and plumbing connections Required clearances External water seal requirements Electrical power supply water makeup piping and drain piping must also be considered Electrical power supply connections are made at the lower or upper right rear corner of the unit Water makeup and drain piping connect...

Страница 7: ...kPa and 550 kPa water conductivity minimum 100 µS cm Water supply line Spill funnel Plumb to floor drain 25 mm air gap DN20 tank drain skimmer and P trap piping rated for 100 C If piping run is over 3 m increase pipe to DN32 after P trap Open floor drain Refer to governing codes for drain pipe size and maximum temperature requirements Cover Electrical conduit knockouts provided top and bottom Comb...

Страница 8: ... with knockout diameters of 28 6 mm and 34 9 mm Install level DC 1139 DN20 frame drain and P trap piping rated for 100 C Two keyholes for wall mounting 406 mm on center 300 mm 50 mm Frame drain Strainer by installer If water piping to humidifier is non metallic we recommend a 50 mm water seal in the supply line to isolate steam during DI RO water system maintenance Notes Offset humidifier from spi...

Страница 9: ...must be a good radio frequency earth Ground wire should be same size as power wiring Shielded screened cable drain wire connection to lug Note For maximum E M C effectiveness all humidity temperature and airflow controls should be wired using multicolored shielded screened plenum rated cable with a drain wire for the shield screen The drain wire should be connected to the shield screen ground term...

Страница 10: ...70 35 144 1 174 95 50 174 1 201 7 120 70 400 Volt three phase I max A Breaker size 0 8 0 10 8 1 10 4 13 10 5 12 8 16 12 9 16 20 16 1 20 25 20 1 25 6 32 25 7 32 40 32 1 40 50 40 1 50 4 63 50 5 64 80 64 1 80 100 80 1 100 125 100 1 128 160 128 1 160 200 A Wire size mm2 Ground wire size mm2 0 15 7 2 5 2 5 15 8 21 4 4 21 1 27 6 6 27 1 37 5 10 10 37 6 51 16 16 51 1 66 7 25 16 66 8 82 5 35 16 82 6 100 5 ...

Страница 11: ...less the SDU I fan mixes room air and steam to ensure complete absorption before discharge as humidified air The SDU I is available for models VM 2 through VM 10 SDU E For higher capacity units The Space Distribution Unit External Absorption SDU E is designed for higher capacity dispersion The SDU E is available for all HUMIDI TECH models except Models VM 16 through VM 34 using three phase 400 V p...

Страница 12: ...l public When performing HUMIDI TECH maintenance If the SDU E or SDU I is installed immediately above the HUMIDI TECH disconnect both hose clamps on the steam hose grip the hose and rotate it to break it loose from the tubing and then slide the hose up onto the SDU steam tube until sufficient clearance is provided to move the tank SDU E mechanical detail DC 1078 57 mm DN40 or DN50 steam inlet 614 ...

Страница 13: ... 1027 As steam is discharged from the SDU E it quickly cools and turns to a visible fog that is lighter than air As this fog is carried away from the SDU E by the airstream it tends to rise toward the ceiling If this fog contacts solid surfaces columns beams ceiling pipes etc before it disappears it could collect and drip as water The greater the space relative humidity the more the fog will rise ...

Страница 14: ...able at right shows hose kit sizes by humidi fier model A hose kit includes vapor hose a dispersion tube and hardware Note that the capacities of models VM 30 and VM 34 require multiple tube assemblies and therefore cannot use a hose kit For multiple tube assemblies see information on RAPID SORB on Page 16 HUMIDI TECH DISPERSION Humdifier models Hose kit vapor hose dispersion tube and hardware Max...

Страница 15: ... humidifier above the level of dispersion tube see the drawing on Page 17 Failure to follow the recommendations on this page may result in excessive back pressures on the humidifier This may lead to dispersion tube s spitting steam blowing through water seals or leaking gaskets See the Hose Kit Sizing table on the previous page Mounting nut M10 Pitch tube toward drain 1 Single dispersion tube with...

Страница 16: ...difier above the level of the RAPID SORB see the drawing on Page 17 Failure to follow the recommendations on this page may result in excessive back pressures on the humidifier This may lead to dispersion tube s spitting steam blowing through water seals or leaking gaskets DC 1448 Duct Stainless steel support by DRI STEEM HUMIDI TECH humidifier Header pitch 1 minimum DN20 copper Open drain Refer to...

Страница 17: ...nt sagging or low spots Obstruction Pitch 1 HUMIDI TECH humidifier Tubing or pipe drip tee by installer DRI STEEM part numbers for 304 stainless steel inline tees 1 DN40 No 162710 2 DN50 No 162712 Funnel or floor drain Refer to governing codes for drain pipe size and maximum temperature requirements 25 mm air gap 200 mm minimum 150 mm recommended To dispersion device DC 1450 Dashed lines indicate ...

Страница 18: ...g or low spots To minimize loss of capacity and efficiency insulate tubing and piping Developed length equals measured length plus 50 of measured length to account for pipe fittings Vapor hose Copper or stainless steel tubing and Schedule 40 steel pipe Hose I D DN Maximum capacity kg h Maximum length m Tube or pipe size DN Maximum capacity kg h Maximum developed length m 40 68 3 40 68 6 1 50 113 3...

Страница 19: ...f a low water condition and is common to all DI humidifiers The wiring diagram is located inside the electrical panel cover HUMIDI TECH START UP AND OPERATION Electrical Verify electrical connections before start up Do not remove the electrical panel cover or heater terminal cover until electrical power is disconnected Safety first Verify that all wiring connections have been made in accordance wi...

Страница 20: ...and connected to the J2 female connector on the control board 6 Turn on water supply Confirm drain valve is closed HUMIDI TECH START UP AND OPERATION 7 Turn on power The keypad will display the introduction of VAPOR LOGIC3 and will then enter AUTO mode 8 The system will initiate filling of the tank with water The keypad will display Filling as part of the idle screen information 9 Airflow switch i...

Страница 21: ...ension and an even boil Skimming will remove most entrained contaminants that have not yet precipitated as scale 2 Draining and flushing will remove entrained contaminants and assist in removing precipitated contaminants like scale and silica To inspect and service standard water models 1 Remove the evaporating chamber Remove the two fasteners on each side of the cover enclosure see figure below R...

Страница 22: ... color coded Reconnect the drain union Reconnect the vapor hose 8 Verify electrical connections Verify that all DIN rail mounted components are securely fastened to DIN rail Verify that all power terminal screws and lugs are tight from power block to heaters See the table on this page for torque specifications Verify that all plugs located under the humidifier cover are completely plugged in 9 Mov...

Страница 23: ...the drain union on the back left corner of the frame Disconnect the steam supply hose from the top of the tank Lift the tank foot above the frame flange and slide the tank assembly forward to remove 2 Loosen the four cover bolts and remove the cover assembly from the tank 3 Inspect the tank interior for debris or pitting 4 Inspect the valve inlet for debris 5 Check the operation of the float valve...

Страница 24: ...f tank to probe electrical continuity Water conductivity must be 100 µS cm or 34 2 mg O Add salt to the tank If this does not solve the problem consult factory for further advice Fill valve stuck open Check valve for foreign matter Drain valve not closed Verify that lever on drain valve is in closed position Fill valve installed backward Check for correct water flow through valve by noting arrow A...

Страница 25: ...ll valve inlet Humidifier does not stop filling Open drain valve Obstruction in drain valve will not allow complete closure Clean or replace valve Manual drain valve not closed Close drain valve Fill valve stuck open Check for foreign matter in valve water logged float broken float arm or worn valve stopper Reduced or no output even though water is at the proper level Heater malfunctioning Verify ...

Страница 26: ...26 HUMIDI TECH REPLACEMENT PARTS OM 778 1 HUMIDI TECH DI model HUMIDI TECH standard water model Note Refer to the tables on the next page for replacement part numbers ...

Страница 27: ...20 VM VMDI 2 4 4 700650 Nut assembly 20 VM VMDI 6 34 2 700650 18 Cover tank gasket 1 No Description Qty Part No 19 Washer No 8 external tooth pltd 2 700200 003 20 Nut 8 32 hex pltd 6 700200 002 21 Cover subpanel 1 120277 22 Fill adapter VM 2 4 1 160226 041 Fill adapter VM 6 16 1 160224 041 Fill adapter VM 21 34 1 160224 052 23 Panel insulation 1 309845 003 24 Sensor temperature 1 405760 25 Screw P...

Страница 28: ...external assembly 1 3 Switch airflow 1 406190 4 Screw 8 32 x 1 2 PHMS Philips 4 700170 007 5 Nut retainer 8 32 4 409593 001 6 Cap black 4 409593 002 7 Dispersion chamber for SDU with 1 outlet 1 160445 001 Dispersion chamber for SDU with 2 outlet 1 160445 002 OM 1503 This is an assembly of multiple parts Contact DRI STEEM customer service to order ...

Страница 29: ...roud 1 330001 002 2 Blower SDU99 external assembly 1 3 Switch airflow 1 406190 4 Screw 8 32 x 1 2 PHMS Philips 6 700170 007 5 Nut retainer 8 32 6 409593 001 6 Cap black 6 409593 002 7 Tubelet 0 375 x 0 375 molded 44 310280 006 This is an assembly of multiple parts Contact DRI STEEM customer service to order OM 1504 ...

Страница 30: ...001 020 Contactor 60 A 1 407001 021 9 Main board VL 3 1 408490 001 10 Display board VL 3 1 408490 002 No Description Qty Part No 11 Plug 4 prong female 4 409585 008 12 Terminal block 3 pole 1 408300 002 13 Fan cooling 1 408677 001 14 Housing 75 Amp white connector 4 409585 001 15 Plate plug retainer 2 409585 009 16 SSR 480 V 50 Amp 1 pole 408677 002 SSR 480 V 50 Amp 2 pole 408677 003 SSR 480 V 60 ...

Страница 31: ... 1 408677 001 11 Housing 75 Amp white connector 4 409585 001 12 Plate plug retainer 2 409585 009 13 Main board VL3 1 408490 001 No Description Qty Part No 14 Display board VL3 1 408490 002 15 Terminal DIN rail mount 8 408252 001 16 Terminal ground 1 408252 010 17 End cap DIN rail mount 1 408252 005 18 Jumper marathon terminal 2 408252 008 19 Relay 24V DPDT finder 1 407900 016 20 Relay socket 1 407...

Страница 32: ...ed warranty is made in lieu of and DRI STEEM disclaims all other warranties whether express or implied including but not limited to any IMPLIED WARRANTY OF MERCHANT ABILITY ANY IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE any implied warranty arising out of a course of dealing or of performance custom or usage of trade DRI STEEM SHALL NOT UNDER ANY CIRCUMSTANCES BE LIABLE FOR ANY DIRECT IN...

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