DRI-STEEM MODEL STS and STS- DI STEAM-TO-STEAM HUMIDIFIERS Installation, Operation, For toll-free technical support call 1-800-328-4447
TABLE OF CONTENTS To the purchaser and the installer and Maintenance Manual DRI-STEEM Humidifier Company General information Installation Operation Maintenance Notes Warranty
STS AND STS-DI HUMIDIFIER OVERVIEW Standard water models (STS) Automatic steam valve To steam supply Steam trap Condensate return Steam outlet Water seal Air gap Open drain Heat exchanger Manual drain or optional motorized drain valve OM-938 Deionized water models (STS-DI) Steam outlet Note: Float valve Automatic steam valve Heat exchanger Steam trap Manual drain valve Condensate return Water seal Air gap Open drain OM-939 Note:
STS AND STS-DI DIMENSIONS AND WEIGHTS STS and STS-DI, all sizes STS and STS-DI (single heat exchanger) sizes 25S, 25C, 50S, 50C, 100S, 100C, 200S, 400C, and 400SNC ¼" pipe thread (DN8) water makeup valve Side view Front view J K A* 5/16" (8 mm) diameter slotted mounting holes C OM-940a D E H B ¾" pipe thread (DN20) drain OM-940b Table 4-1: Humidifier weights Model number STS-25 Shipping weight lbs kg lbs Operating * w eight kg STS and STS-DI (dual heat exchanger) size 800C and 800SNC Front view ¼" pipe thread (DN8) water makeup valve STS-50 STS-100 STS-200 STS-400 STS-800 A* F G D J K E ½" (12 mm) diameter slotted mounting holes Note: H B ¾" pipe thread (DN20) drain OM-940c
STS AND STS-DI DIMENSIONS Table 5-1: Mechanical dimensions for STS and STS-DI units with copper heat exchanger(s) STS and STS-DI model numbers Description 25C 50C 100C 400C 800C inches mm inches mm inches mm inches mm inches mm A Overall height* B Face width C Face length D Distance from bottom to supply inlet E Distance from bottom to return outlet F G H J K Distance from bottom to supply inlet of second heat exchanger Distance from bottom to return outlet of second heat exchanger Distance from side to heat exchanger Pressurized steam supply inlet Pressurized steam return outlet Table note: Table 5-2: Mechanical dimensions for STS and STS-DI units with stainless steel heat exchanger(s) STS and STS-DI model numbers Description 25S 50S 100S 200S 400SNC 800SNC inches mm inches mm inches mm inches mm inches mm inches mm A Overall height* B Face width C Face length D Distance from bottom to supply inlet E Distance from bottom to return outlet F Distance from bottom to supply inlet of second heat exchanger G Distance from bottom to return outlet of second heat exchanger H Distance from side to heat exchanger J Pressurized inlet steam supply K Pressurized outlet steam return Table notes:
STS AND STS-DI CAPACITIES Table 6-1: Capacities for units with copper heat exchangers Output capacities with copper heat exchangers Model number psi kpa psi Steam pressure* kpa psi kpa psi kpa 5 34 10 69 13 90 15 103 Table 6-2: Capacities for units with stainless steel heat exchangers O utputcapac ti ei s w tih sta ni el ss steelheatexchangers M odel num ber psi kpa psi Steam kpa pressure* psi kpa psi kpa 5 34 10 69 13 90 15 103 Table 6-1 and 6-2 notes: Notes about heat exchangers and water type:
STS AND STS-DI LOCATION Locating the humidifier Figure 7-1: STS clearance recommendations Top: 18" (457 mm) Left side with control cabinet mounted: 36" (914 mm) Left side: 6" (152 mm) Rear: 6" (152 mm) Angle iron support leg Front: 36" (914 mm) Right side: 6" (152 mm) Bottom: 24" (610 mm) DC-1452
STS AND STS-DI MOUNTING IMPORTANT: Mounting methods Support legs (STS/STS-DI models 25, 50, 100 only) Trapeze hanger (STS/STS-DI models 25, 50, 100 only) H-legs (STS and STS-DI models 200, 400, 800 only) Wall brackets (STS/STS-DI models 25, 50, 100 only) A STS m odel 25C 25S 50C 50S 100C 100S ni ches A m m ni ch se 15½ 394 24 610 21 533 30 762 B m m DRI-STEEM optional brackets (two required) B DC-1454
STS AND STS-DI PIPING Drain piping To allow normal operation and prevent steam from escaping through the drain line, the installer must provide a water seal of a sufficient height to contain the pressure developed in the humidifier system. Figure 9-1: Field piping overview Water supply shut-off valve, by installer Shock arrester recommended to eliminate water hammer, by installer ¾" pipe thread (DN20) dispersion unit condensate return inlet ¼" (DN8) water supply line; water pressure range 25 psi to 80 psi (172 kpa to 582 kpa); water conductivity minimum 2 grains/gallon (100 μs/cm) Steam vapor outlet Install level Condensate return piping from dispersion unit Air vent tube 6" (152 mm) minimum H2: Air vent height must be equal to or greater than H2 (see table on next page). Unions, by installer Vacuum breaker, by installer Strainer From steam source Condensate return to nonpressurized system, by gravity only ¾" (DN20) minimum condensate drain piping rated for 212 F (100 C) Trap 12" (305 mm) minimum drop to trap H1 Skim and overflow piping (see table on next page) Pitch 1 /8"/ft (1%) Install level Manual or electric drain valve If run is over 10' (3 m), increase pipe to 1¼" (DN32). Overflow line Water seal line Water seal line MUST be below drain valve to ensure humidifier drains correctly. 1" (25 mm) air gap Open floor drain. Refer to local governing codes for drain pipe size and maximum temperature requirements. DC-1451
STS AND STS-DI PIPING Drain piping, continued STS humidifier STS-DI humidifier Alternate water seal and drain valve piping Drain connection Open drain Skimmer outlet Air gap Dashed lines indicate provided by installer Top of water seal must be below skimmer outlet H1 (see table below) OM-945 Use when water seal must be elevated above flow line of drain connection, such as when the humidifier is mounted near the floor. Table 10-1: H1 and H2: Heights required to overcome humidifier internal pressure Unit output Water seal height (H1) All STS models STS models 25C, 25S, 50C, 50S, 100C, 100S, 200S, 400C Air vent height (H2) STS model 800C lbs/hr kg/h inches mm inches mm inches mm up to 138 62 12 305 27 686 -- 139 to 183 63 to 83 15 381 30 762 -- -- 184 and greater 84 18 457 33 838 42.25 1073
STS AND STS-DI PIPING Note: Water supply piping STS model STS-DI model VAPORLOGIC 3 Installation and Operation Manual
STS AND STS-DI PIPING Steam supply piping Note for STS-800 models: Figure 12-1: Steam supply piping Steam main Steam trap, required for proper operation (by DRI-STEEM ) Alternate vacuum breaker position 12" 12" Vacuum breaker (by installer) OM-941 End of branch trap (by installer) Swing check valves (by installer) Gravity condensate return
STS AND STS-DI WIRING Caution: Only qualified electrical personnel should perform installation procedures. Electrical wiring diagrams provided with humidifier and control cabinet Electrical installation Wiring requirements CAUTION:
STS AND STS-DI WIRING CAUTION: Control wiring Grounding requirements Figure 14-1: Humidifiers with LW417 To humidifier probe head on tank Brown, top probe rod (full water condition) Orange, middle probe rod (refill water condition) Violet, bottom probe rod (low water condition ) V O BR OM-829a Figure 14-2: Humidifiers with VAPOR-LOGIC 3 Brown or black, top probe rod (full water condition) Orange or white, middle probe rod (refill water condition) Violet or red, bottom probe rod (low water condition on standard water models) Probe wiring OM-VL3-11 IMPORTANT:
STS AND STS-DI STEAM DISPERSION INSTALLATION STS dispersion tube installation with condensate drain Vapor hose Hard piping Tube mounting Minimum condensate drain line sizing Figure 15-1: Single tube and escutcheon plates 2.5" (64 mm) 1.5" (38 mm) (83 mm) 3.25" 3.25" 3.25" (83 mm) 3.25" (83 mm) (83 mm) ¼" pipe thread (DN8) end Premolded high temperature resin steam inserts Mounting nut, 3 /8" (M10) ½" (DN15) O.D. copper tubing (condensate drain) Movable escutcheon plate (plate can be mounted within limits of 2.5" [64 mm]) OM-351a Figure 15-2: Single tube with condensate wasted to floor Vapor hose, tubing, or pipe 90% long sweep or two 45 elbows STS humidifier 5" (127 mm) water seal 1" (25 mm) air gap Pitch* 6" (152 mm) minimum Duct ¼" pipe thread (DN8) Condensate drain tube, by installer (¾" [DN20] minimum)** Open drain Single dispersion tube with condensate drain Mounting nut, 3 /8" (M10) Pitch tube toward drain 1/8"/ft (1%) ½" (DN15) O.D. condensate drain tube, pitch ¼"/ft (2%) DC-1473a continued...
STS AND STS-DI STEAM DISPERSION INSTALLATION STS dispersion tube installation with condensate drain, continued Figure 16-1: Multiple tube with condensate returned to humidifier Vapor hose, tubing, or pipe Duct Single dispersion tube with condensate drain Mounting nut, 3 /8" (M10) 90% long sweep or two 45 elbows Pitch* ½" (13 mm) air vent 6" (152 mm) minimum 6" (152 mm) minimum ¼" pipe thread (DN8) 5" (127 mm) water seal Pitch tube toward drain 1 /8"/ft (1%) ½" (DN15) O.D. condensate drain tube, pitch ¼"/ft (2%) STS humidifier ¾" (DN20) condensate return connection (on face plate) H2 (see table, Page 10) DC-1473b Condensate drain tube, by installer (¾" [DN20] minimum)** Figure 16-2: Multiple tube with condensate wasted to floor Duct Multiple dispersion tube Vapor hose, tubing, or pipe 90 long sweep or two 45 elbows STS humidifier Pitch* Water seal 5" (127 mm) 1" (25 mm) air gap 6" (152 mm) ¼" pipe thread (DN8) Open drain Pitch tube toward drain 1/8"/ft (1%) ½" (DN15) O.D. condensate drain tube, pitch ¼"/ft (2%) Condensate drain tube provided by installer, ¾" (DN20) minimum Mounting nut, 3 /8" (M10) DC-1048a Notes: 1. Dashed lines indicate provided by installer. 2. Review drawings and tables on all pages of this document.
STS AND STS-DI STEAM DISPERSION INSTALLATION Selecting the location Overhead installation Figure 17-1: Overhead installation Secure rods to overhead construction Provide 18" (457 mm) minimum clearance above cover Threaded rod 3/8" (M10) diameter Angle or channel sized to properly support humidifier Humidifier drain to appropriate building waste. Do not drain humidifier directly into drip pan. 1¼" (DN32) minimum 25% larger than humidifier Drip pan recommended in overhead installations (by installer) to DC-1453 prevent possible water damage
RAPID-SORB LOCATION Horizontal duct installation Before you start Locating the RAPID-SORB IMPORTANT: Note: Pitch Figure 18-1: RAPID-SORB installed in a horizontal airflow with header outside the duct 90 long sweep or two 45 elbows Vapor hose, tubing, or pipe 90 long sweep or two 45 elbows Vapor hose, tubing, or pipe L-bracket Dispersion tube Tubelets (steam orifices) Slip coupling or hose cuff Pitch: 1 /8"/ft (1%) STS humidifier Header ¾" pipe thread (DN20) condensate drain ¾" (DN20) copper 1" (25 mm) air gap Open drain Duct Airflow Support bracket 5" (127 mm) DC-1471 Figure 18-2: RAPID-SORB installed in a horizontal airflow with header inside the duct L-bracket Dispersion tube Tubelets (steam orifices) Slip coupling or hose cuff Pitch: 1 /8"/ft (1%) STS humidifier Header ¾" pipe thread (DN20) condensate drain ¾" (DN20) copper 1" (25 mm) air gap Open drain DC-1472 6" (152 mm) Airflow Duct Support bracket 6" (152 mm) 5" (127 mm)
RAPID-SORB PIPING IMPORTANT: FAILURE to follow the recommendations on these pages and all enclosed documents can result in excessive back pressures on the humidification system. This will result in unacceptable humidification system performance such as leaking gaskets, blown water seals, erratic water level control, and spitting condensate from dispersion tube. When using vapor hose When using tube or pipe Figure 19-1: Drip tee installation (piping over obstruction) 90 long sweep or two 45 elbows Pitch* Dashed lines indicate provided by installer. Obstruction Insulate tubing and hard pipe to reduce steam loss STS humidifier To dispersion device 6" (150 mm) minimum Tubing or pipe drip tee, by installer 8" (200 mm) minimum ¾" (DN20) 1" (25 mm) air gap Funnel or floor drain DC-1470
RAPID-SORB PIPING Table 20-1: Steam loss of interconnecting vapor hose, tubing, and pipe Description Hose Tubing Pipe Nominal hose, tubing or pipe size inches DN Noninsulated lbs/hr/ft kg/h/ m Steam loss lbs/hr/ft Insulated kg/h/ m Insulation thickness inches Note: mm Table 20-2: Maximum steam carrying capacity and length of interconnecting vapor hose, tubing, and pipe* V aporhose C opperorsta ni el ss steeltub ni g and Schedu el 40 steelp pi e H ose D.I. M ax mi um capac tiy M ax mi um el ngth** Tube or p pi e s zi e*** M ax mi um capac tiy M ax mi um eve ol ped el ngth d ni ches D N bl s h/ r kg/ h ft m ni ches Notes: D N bl s h/ r kg/ h ft m
RAPID-SORB ASSEMBLY AND INSTALLATION Header outside the duct To assemble
RAPID-SORB ASSEMBLY AND INSTALLATION Header inside the duct To assemble
RAPID-SORB ASSEMBLY AND INSTALLATION Steam supply connections to RAPID-SORB header Condensate drain connections to RAPID-SORB header
STS AND STS-DI START-UP PROCEDURE Introduction Start-up and checkout procedures CAUTION: Only qualified electrical personnel should perform the start-up procedure. VAPOR-LOGIC Installation and Operation 3 Manual VAPOR-LOGIC Installation and Operation 3 Manual VAPOR-LOGIC 3 Installation and Operation Manual.
STS AND STS-DI START-UP PROCEDURE LW417 electronic water level control module (for standard water units only) Water refill Low water condition Electronic probe control for maintaining proper water level IMPORTANT: Timer logic input wire (see diagram on next page) must be connected per wiring diagram for proper automatic drain and flush and end-of-season drain operation. The Power light s blinking off twice at one-second intervals indicates that these functions have been disabled. Verify wiring with diagram supplied with unit. A Fill valve off B Fill valve on C Low water OM-211-2
STS AND STS-DI START-UP PROCEDURE Automatic drain and flush End-of-season drain Onboard diagnostics Test cycling the drain/flush system Failure to do so will result in a drain/flush cycle every 2 minutes IMPORTANT: Timer logic input wire (see diagram below) must be connected per wiring diagram for proper automatic drain and flush and end-ofseason drain operation. The Power light s blinking off twice at one-second intervals indicates that these functions have been disabled. Verify wiring with diagram supplied with unit. Figure 26-1: LW417 circuit board Bottom water probe input (violet) Middle water probe input (orange) Top water probe input (brown) Ready water output (blue) Fill valve output (tan) Timer logic input (red) Drain valve output (gray) 24 VAC common input (white) 24 VAC hot input (black) Ready water light Full light Variable skim times Ground mounting holes, 3 / 16 " diameter Power light Drain light Slide switch settings OM-918
STS AND STS-DI OPERATION AND MAINTENANCE INFORMATION STS water quality recommendations Water quality makes a difference Note: Adjusting skim duration STS-DI water requirements
STS OPERATION AND MAINTENANCE INFORMATION Standard water unit maintenance Cool down Standard drain valve: Alternative method with VAPOR-LOGIC option VAPOR-LOGIC 3 Installation and Operation Manual Manual Drain Auto Manual Drain Safety IMPORTANT: Standby OFF OFF Inspection Annual (also recommended when maintenance is performed) continued...
STS OPERATION AND MAINTENANCE INFORMATION Standard water unit maintenance, continued Seasonal (or as required, depending on water quality) Cleaning tank Cleaning the probes Cleaning skim overflow port -season maintenance
STS -DI MAINTENANCE INFORMATION Deionized water unit maintenance Cool down Standard drain valve: End-of-season drain option (VAPOR-LOGIC 3 only): VAPOR-LOGIC 3 Installation and Operation Manual Manual Drain Auto Manual Drain Safety IMPORTANT: Standby OFF OFF Inspection Annual (also recommended when maintenance is performed) -season maintenance On units with Teflon coated heat exchangers, do not use a sharp object when cleaning.
STS AND STS-DI TROUBLESHOOTING GUIDE Sym ptom Poss bi el cause R ecom m ended actoi n H um di fi ei rw lli notheat No control transformer output Verify control voltage. Set humidistat to call. Humidistat is not calling Inspect for faulty humidistat. Safety controls open (high limit, air proving, etc.) Check safety controls. Faulty control board S ee VAPOR-LOGIC o LW417 troubleshooting guide. 3 r Probe corrosion Replace probes.* Steam stop valve closed Verify valve is opened. Steam trap plugged Clean trap body. Low or no steam Verify steam is present. Steam strainer plugged Clean strainer. H um di fi ei rw lli notf lli No water pressure Verify manual water supply valve (172 kpa) supply pressure. is open, minimum 25 psi Faulty water fill valve Verify action of fill solenoid valve; verify contol voltage present at coil. Audible click should be heard as solenoid operates. Plugged water strainer Clean strainer. Plugged valve Clean valve. Faulty control board Verify control voltage. H um di f nilli g fi ei rdoes notstop Lack of tank-to-probes continuity Jumper wires violet, orange, and then brown to ground. If water stops, verify tank ground. Water conductivity less than 100 micromhos/cm minimum (2 grains per gallon) Check water supply conductivity; then consult factory. Manual drain not fully closed Close manual ball valve. Fill valve stuck open Check valve for foreign matter. Fill valve installed backward Check for correct water flow through valve; note arrow. Low output Automatic drain valve not seating Clean ball and seat of valve. Manual drain not fully closed Close manual ball valve. Excessive skimming amount Reduce skim time. Fill valve stuck open Check valve backward. for foreign matter. Check if valve installed Low supply steam pressure Check steam supply pressure. specified on unit. Provide steam pressure as Steam valve inoperable Valve not opening fully. Check signal to valve. Steam trap blocked. Trap not passing condensate. Scale coated heat exchanger Clean heat exchanger.
LW417* TROUBLESHOOTING GUIDE Sym ptom M odu el Fu ll ni d ci atni g R eady w ater gil hts D ra ni Poss bi el cause R ecom m ended actoi n H um di heat fi ei rw lli not C ontrol transforme r Verify control voltage across secondary leads of transformer. Reset transformer circuit breaker. On On H umidistat is not calling Set humidstat to call. Inspect for faulty humidistat or wiring. S afety controls open Check safety controls, airflow switch, high limit humidistat, etc. Ready Water indicator off but enough water in tank F aulty control board Verify control voltage between input terminals B & W. O ff Not enough water in tank; water supply closed Low water conductivity Open water valve. If water in tank, minimum). add salt (100μS/cm [2 grains/gallon] Probe corrosion Wiring or module Clean water probe tips.** Connect jumper wire from violet to white indicator remains off, replace module. wire. If Ready Water Blinking green LED power light (on 1 sec., off 1 sec.) H um f lli di fi ei rw lli not H um di fi ei rdoes not stop f nilli g Low output U n ti shortcyc el s On On On On On & On On On On Water detection wire System detected faulty probe rod assembly Faulty full relay on LW417 board Wiring System in end-of-seaso n drain mode Check that tank has common water with 24 VAC common white wire. Clean or replace probe rod. detection wire to ground Unplug probe plug from humidifier probe head. Fill LED light should be off. Check for 24 VAC across fill valve coil. If not present, FULL relay is defective. Replace module. Ensure that Fill valve is wired to drain valve output. Water detection probe wiring is correct. Wiring distance between humidifier tank and water level control is not greater than 30 feet (9 m). Create a call for humidity to reset the system and energize fill valve. A utodrain mode Ten minutes must complete first. Faulty fill valve relay in LW417 Control module wiring Faulty control logic from LW417 O ff Faulty Ready Water detection Controls and safeties No call from humidistat or duct high limit humidistat Airflow proving switch miswired or is defective. Probes incorrectly wired or need cleaning If Full LED light on control module is on energized, module is defective. Replace. Check wires diagram. and fill valve is for proper connections to control module; see Ensure wiring distance between humidifier tank level control is not greater than 30 feet (9 m). If Full LED light on control module module is defective. Replace. and water is off and tank is full, Install jumper wire between violet and white wire leads, which should activate Ready Water LED light and relay. If not activated, module is defective. Replace. Ensure wiring distance bewteen humidifier tank and water level control is not greater than 30 feet (9 m). Do not used shielded (screened) cable when wiring water detection probe system between humidifier and controller; use 2 18-gauge (1 mm ) individual stranded wire. Replace airflow proving switch. Confirm that unit is wired per diagram. Clean probe rod tips with steel wool. VAPOR-LOGIC 3 Installation and Operation Manual
STS AND STS-DI TANK REPLACEMENT PARTS Figure 33-1: Tank replacement parts OM-946
STS AND STS-DI TANK REPLACEMENT PARTS LIST Table 34-1: Tank replacement parts list Note: Components may be in different location or orientation than shown in drawing on previous page. No. Description Part number
STS AND STS-DI CONTROL CABINET Figure 35-1: Control cabinet replacement parts Note: Components may be in different location or orientation than shown in drawing. OM-949 No. Descrpi toi n Partnum ber 1 Control cabinet, 12 x 12 407100-003 2 Subpanel, STS 165720-002 C 408632 3 3 ontrol board, VAPOR-LOGI C 3 Control board, LW417 408490-001 4 Transformer, 120V to 24V 408965-001 5 Terminal block 408252-001 6 Ground termina l 408252-010 7 Terminal jumper 408252-009 8 AREA-TYP E time delay relay 407900-010/016/018 9 DIN-rail end cap 408252-006 10 Terminal spacer 408252-005 11 DIN-rail, 6.5" (165 mm) 167765-006 12 Ground lug 409250-003 13 P-E switch 408100 14 Interlock switch 408470 15 Interlock switch bracket 165614 16 VAPOR-LOGI C keypad 408490-002 3 17 VAPOR-LOGI C keypad cable, 5' (1.5 m) 408490-009 3 * Specify humidifier model and serial numbers when ordering.
STS AND STS-DI MAINTENANCE SERVICE RECORD Date inspected Personnel Observation Action performed
STS AND STS-DI MAINTENANCE SERVICE RECORD Date inspected Personnel Observation Action performed
NOTES
NOTES
TWO-YEAR LIMITED WARRANTY Corporate Headquarters Europe ice Continuous product improvement is a policy of DRI-STEEM Humidifier Company; therefore, product features and specifications are subject to change without notice. Form No. STS-C-0103-M-0203 2003 DRI-STEEM Humidifier Company Part No. 890000-502 Rev A