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26

STS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

Steam main

Alternate vacuum
breaker position

12"

12"

Vacuum breaker
(by installer)

Gravity condensate return

End of branch trap
(by installer)

Swing check valves
(by installer)

OM-941

Steam trap, required for proper
operation (by DriSteem)

The heat exchanger in the STS humidiﬁ er is designed for a maximum steam
pressure of 15 psi (105 kPa). The steam valve, trap, and strainer are shipped
loose for ﬁ eld installation.

Figure 26-1 shows piping from an overhead steam supply main with
condensate returned to a vented gravity ﬂ ow return system. Note the steam
trap installed at the bottom of the branch feeding the steam valve of the STS.
Failure to install this trap will cause water hammer, which could damage the
STS heat exchanger.

Vacuum breakers are necessary to ensure that condensate can drain from the
heat exchanger when the steam valve closes.

Lifting condensate with pressurized steam is not recommended. Premature heat
exchanger failure and erratic control can occur when using pressurized steam
to lift condensate. A steam condensate pump is recommended when lifting
condensate in a pressurized system.

Note:

For STS 800 models, to guarantee steam output
capacities, a dedicated steam valve and steam
trap is required for each heat exchanger.

INSTALLATION

Piping: Pressurized steam supply

FIGURE 26-1: STEAM SUPPLY PIPING TO STS HUMIDIFIER

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Содержание STS 100C

Страница 1: ...STS Steam to Steam Humidifier Installation Operation and Maintenance Manual READ AND SAVE THESE INSTRUCTIONS...

Страница 2: ...ons Read this manual before performing service or maintenance procedures on any part of the system Failure to follow all warnings and instructions could produce the hazardous situations described resu...

Страница 3: ...ing service or maintenance procedures on this humidi er after the tank has cooled down and drained 1 Follow the Cool down humidi er instructions on Page 50 tap softened water STS or Page 53 STS with R...

Страница 4: ...we will be happy to mail literature to you WARNINGS AND CAUTIONS ii OVERVIEW 2 Product overview 2 Tap softened water 2 RO DI water option 2 Water type conversion 2 Dimensions 4 Capacities electrical s...

Страница 5: ...of contents OPERATION 47 Start up procedure 47 Start up checklist 48 MAINTENANCE 49 Water quality 49 Tap softened water 50 RO DI water option 53 Outdoor Enclosure 55 REPLACEMENT PARTS 56 Humidifier ta...

Страница 6: ...n be converted in the eld for use with RO DI water and STS RO DI water humidi ers can be converted in the eld for use with tap softened water Contact your DriSteem representative or distributor for pa...

Страница 7: ...water control water level using a oat valve An optional low water cutoff switch is available as a remote water indicator mc_030910_1336 STS Humidi cation steam outlet Probe water level control Boiler...

Страница 8: ...slot B A E H D C OM 932 OM 931 J K L M B E F C H G J A D L K M Mounting hole 1 2 dia 12 mm slot Notes Tap softened water model shown See dimensions in Tables 5 1 and 5 2 Notes Tap softened water model...

Страница 9: ...5 3 75 95 C S and SNC in model numbers are explained in Table 6 1 Add 23 5 597 mm to overall height when STS is mounted on four support legs Add 22 5 572 mm to overall height when STS is mounted on tw...

Страница 10: ...20 327 790 358 800C 650 295 1275 578 1500 680 1600 726 mc_010411_1645 Table 6 2 STS humidifier models and capacities with stainless steel heat exchangers STS models Steam pressure at connection to STS...

Страница 11: ...al equipment see Figure 26 1 Plumbing connections supply water drain piping and condensate return piping Water seal requirements Avoid locations above critical equipment or processes to avoid damage t...

Страница 12: ...2 3 8 M10 threaded rod of length required 3 Angle or channel sized to properly support humidi er 4 Humidi er drain to appropriate building waste Do not drain humidi er directly into drip pan Install w...

Страница 13: ...sh with the front and back anges of the tank Wood stud wall Mount two horizontal 2 4 boards 100 mm 50 mm timbers 16 404 mm on center STS 25 Lag bolt coach screw the 2 4s to two studs STS 50 Lag bolt t...

Страница 14: ...75 66 1676 B Length 43 5 1105 53 1346 C Width 62 1575 78 25 1988 D Distance from bottom 22 559 22 559 mc_012511_1605 OM 7465 Table 10 1 Weather cover weights Weather cover size lbs kg STS 25 to 100 42...

Страница 15: ...on must comply with all governing codes The bottom of the weather cover is open to accommodate piping and electrical connections Electrical connections must be made with approved outdoor rated waterti...

Страница 16: ...trap in the branch line leading to the humidi er 5 The preferred location for the STS steam control valve is inside the Outdoor Enclosure If one of these valves must be located inside the building it...

Страница 17: ...or Enclosure DC 1478 B Standard steam outlet exits enclosure here Intake ventilation fan D C Pipe chase extending 1 25 mm above enclosure oor STS humidi er Electrical and cleanout access door Control...

Страница 18: ...oes off water drains out of the ll line to prevent freezing 2 Ensure that water lines are protected from freezing conditions Install heat tracing and insulation on ll piping inside the Outdoor Enclosu...

Страница 19: ...n outlets gasoline storage or other contaminants that could potentially cause dangerous situations Using or storing gasoline or other ammable vapors and liquids in open containers in vicinity of Outdo...

Страница 20: ...bility to verify handling equipment s capability to safely handle Outdoor Enclosure Outdoor Enclosure has two available steam distribution con gurations Standard con guration is a steam outlet on one...

Страница 21: ...ing piping from steam outlet to dispersion assembly STS OUTDOOR ENCLOSURE SEQUENCE OF OPERATION Power is applied to Outdoor Enclosure If ambient temperature in enclosure is below 50 F 10 C the strip h...

Страница 22: ...uire that the 212 F 100 C drain and skim water from the humidi er be tempered before it is discharged into the building drain piping The Drane kooler option will temper 6 gpm 22 7 L m of 212 F 100 C w...

Страница 23: ...Bite connection Make sure drain line is clean round and free from damage 4 Mark insertion depth on drain line according to table below for your ProBite connection size 5 Push drain line into ProBite c...

Страница 24: ...ent of the water supply assembly is a solenoid valve there may be noise issues that surface during a ll cycle During a ll cycle the supply water drops the water temperature in the tank and may collaps...

Страница 25: ...minimum continuous operating temperature DriSteem recommends installing a three foot 914 mm piece of noninsulated stainless steel pipe directly off the humidi er prior to connecting to the nonmetallic...

Страница 26: ...ated for 212 F 100 C Strainer Unions by installer Water supply shut off valve by installer Shock arrester recommended to reduce water hammer by installer Steam outlet Install level Install level Elect...

Страница 27: ...10411_1555 Shock arrestor by installer recommended to eliminate water hammer mc_010411_1550 tap Piping Tap softened water two heat exchangers FIGURE 23 1 FIELD PIPING OVERVIEW FOR TAP SOFTENED WATER S...

Страница 28: ...ller Condensate return to nonpressurized system by gravity only 12 305 mm minimum drop to trap If water piping to humidi er is nonmetallic we recommend a 2 50 mm metallic water seal or loop in the sup...

Страница 29: ...ow prevention is required however governing codes prevail Damage caused by chloride corrosion is not covered by your DriSteem warranty Dashed lines indicate provided by installer H1 see Table 24 1 3...

Страница 30: ...team trap installed at the bottom of the branch feeding the steam valve of the STS Failure to install this trap will cause water hammer which could damage the STS heat exchanger Vacuum breakers are ne...

Страница 31: ...icate provided by installer Tap softened water model shown Table 27 1 STS steam outlet sizes and types STS model Hose size Flange size 2 DN50 3 DN80 4 DN100 5 DN125 6 DN150 25 X 50 X X 100 X X X 200 X...

Страница 32: ...he humidi er must be rated for 105 C All STS humidi ers have a 120V single phase electrical supply for North America or 230V single phase electrical supply for Europe Verify current characteristics an...

Страница 33: ...E SHIELDED SCREENED CABLE FOR WATER LEVEL CONTROL DEVICES The tank temperature sensor can be run with 18 gauge 1 mm2 stranded wire if the control cabinet is located within 10 3 m of the humidi er For...

Страница 34: ...e window glass on north or northeast facing window SENSOR LOCATION IS CRITICAL Sensor location has a signi cant impact on humidi er performance See the recommendations below and Figure 30 1 Note DriSt...

Страница 35: ...coming in contact with any metal surface before re or smoke detection devices before a split in the duct otherwise the dispersion assembly can direct more moisture into one duct than the other When dr...

Страница 36: ...mixes that can affect humidi er system performance adversely Using hose from alternative manufacturers increases the possibility of tank foaming and accelerated aging Foaming causes condensate discha...

Страница 37: ...Maximum capacity3 Maximum developed length4 inches DN lbs hr kg h ft m inches DN lbs hr kg h ft m 2 50 250 113 10 3 2 50 220 100 30 9 1 When using steam hose use DriSteem steam hose for best results F...

Страница 38: ...To dispersion device Insulate tubing and to reduce steam loss 90 long sweep or two 45 elbows Obstruction Pitch Tubing drip tee by installer DriSteem part number for 304 stainless steel in line tee 2...

Страница 39: ...ater seal run the drain line to an open drain with a 1 25 mm vertical air gap Cut the drain line at a 45 angle on the end above the drain to permit a direct stream of water into the drain pipe while m...

Страница 40: ...of dispersion tube s and interconnecting piping for Single tube or multiple tube evaporative dispersion units Condensate drain Type of interconnecting piping Diameter of dispersion tube and interconne...

Страница 41: ...r gap only in spaces with adequate temperature and air movement to absorb ash steam or condensing on nearby surfaces my occur Refer to governing codes for drain pipe size and maximum discharge water t...

Страница 42: ...ead end 1 2 O D DN15 condensate drain Condensate drain tube by installer 3 4 DN20 minimum Return line piping material must be suitable for 212 F 100 C water Note Condensate may be returned to the humi...

Страница 43: ...d Locate air gap only in spaces with adequate temperature and air movement to absorb ash steam otherwise condensation may form on nearby surfaces Refer to governing codes for drain pipe size and maxim...

Страница 44: ...t provides necessary access in and around the ductwork or air handler The Rapid sorb typically is installed centered side to side in a duct or is installed across the face of a coil in an air handler...

Страница 45: ...persion tubes and headers for Rapid sorb evaporative dispersion units Airflow Type of interconnecting piping Diameter of interconnecting piping Pitch of interconnecting piping Pitch of dispersion tube...

Страница 46: ...cut holes in the ductwork for the dispersion tubes Use the L bracket as a template to mark the holes on the duct floor 2 Temporarily loosely suspend or support the header below the final location Ver...

Страница 47: ...cated in the L bracket Dispersion tube and slip coupling must be fully engaged on header stub for O rings to provide a seal High end of L bracket can be fastened tight to duct or air handler Fastener...

Страница 48: ...ductwork or air handler for steam header penetration condensate drain piping and header support bracket fastener Allow 1 8 ft 1 header pitch toward the support bracket when you drill the hole for the...

Страница 49: ...rsion tube and slip coupling must be fully engaged on header stub for O rings to provide a seal High end of L bracket can be fastened tight to duct or air handler Fastener on low end of L bracket must...

Страница 50: ...from blowing out of the drain line After the water seal run the drain line to an open drain with a 1 25 mm vertical air gap Cut the drain line at a 45 angle on the end above the drain to permit a dir...

Страница 51: ...up checklist items See Page 48 7 Monitor humidifier operation through multiple fill cycles The humidifier operating status appears on the keypad display 8 On tap softened water units water skims from...

Страница 52: ...ay connector on the Vapor logic board Turn on the water supply and con rm that the drain valve is closed Turn on power to the humidi er and con rm the Main menu is displayed on the keypad display The...

Страница 53: ...n the softening process SKIM DURATION Skim duration determines the quantity of water skimmed with each ll cycle and is eld adjustable using the Vapor logic keypad display Skimming reduces the need for...

Страница 54: ...he control modes screen the ll valve opens and the humidi er cools down When the ll valve closes select Manual Drain in the control modes screen and allow the tank to drain dry The humidi er should be...

Страница 55: ...tank remove the four bolts that attach it to the tank Then lift the housing up out of the tank The scale should ake off easily from the probe assembly rods The bottom 3 8 10 mm is the sensing portion...

Страница 56: ...al if water quality causes the water seal to become clogged often with scale When the seasonal maintenance requirements are complete Re install the cleanout plate and torque the nuts to 25 to 35 in lb...

Страница 57: ...ve The oat valve opens Let the ll water run until the tank is cooled then shut off the eld installed manual supply water shut off valve Let the tank drain then manually close the drain valve Models wi...

Страница 58: ...al free water is used in the humidi er no cleaning or ushing should be necessary 2 Off season maintenance Perform a complete inspection of the following Heat exchanger Float valve Humidi er tank and g...

Страница 59: ...eypad control mode to Standby 2 Place all power disconnects in OFF position and lock in OFF position 3 Close the eld installed manual supply water shut off valve 4 Close the manual shut off valve on t...

Страница 60: ...56 STS INSTALLATION OPERATION AND MAINTENANCE MANUAL Humidifier tank OM 946 REPLACEMENT PARTS FIGURE 56 1 TANK REPLACEMENT PARTS...

Страница 61: ...late gasket STS 50 100 308015 002 Cleanout plate gasket STS 800 505340 7 Fill assembly Consult factory 8 Float ll assembly STS 25 50 100 505315 Float ll assembly STS 200 400 505305 Float ll assembly S...

Страница 62: ...ransformer 120V to 24V 408965 001 5 Terminal block 408252 001 6 Ground terminal 408252 010 7 Terminal jumper 408252 009 8 Relay 24V 3PDT Finder 407900 017 9 DIN rail end cap 408252 006 10 Terminal spa...

Страница 63: ...drawing Description Part number 1 500W strip heater 405800 052 2 1100W strip heater 405800 053 3 Cooling fan 405800 068 4 Gasket door or roof 308005 010 5 Stat high limit 405800 065 6 Stat heater 4058...

Страница 64: ...any other legal theory even if DriSteem has notice of the possibility of such damages By purchasing DriSteem s products the purchaser agrees to the terms and conditions of this Limited Warranty Extend...

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