® Va p o r-lo g i c 3 H umidifie r Control S yste m Ins tal l ati o n a n d Op erati o n Man u al
Ta b l e o f c o n t e n t s Overview Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Summary of features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control input signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TP modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SSR modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1BHF JJ t %3* 45&&.
1SPEVDU PWFSWJFX Accurate, responsive microprocessor control Vapor-logic3 provides comprehensive control for DRI-STEEM humidifiers. With extensive capabilities and easy-to-use keypad, the Vapor-logic3 efficiently controls all humidifier functions. Navigating the keypad to adjust or review humidifier functions is an intuitive process of walking through easily read screen menus.
Summary of features Summary of features t Self-diagnostic test at startup t End-of-season automatic drain t 3FBM UJNF DMPDL allows time-stamped alarm tracking and three ways to program drain and flush cycles: 1. Usage (unit drains after a set number of pounds [kg] of water cycle through) 2. Usage and interval (time) (unit drains at a preset time after a set number of pounds [kg] of water cycle through) 3.
Control input signals DRI-STEEM offers three control options for all its humidification systems controlled by Vapor-logic3: on-off control, demand signal control, and transmitter control. On-off control On-off control—the simplest control scheme—does exactly what its name implies: the output device turns fully on, then fully off. Most residential furnaces use this type of control. The humidistat that controls the humidifier has a differential between the on and off switch points.
Control input signals, continued Transmitter control With transmitter control, the Vapor-logic3 board receives a linear signal that corresponds to the actual humidity level measured in the space being controlled. (With a transmitter provided by DRI-STEEM, the signal is 4 to 20 mA, which corresponds to 0 to 100% RH). The Vapor-logic3 controller employs an internal PID loop that uses this humidity measurement along with a user–defined humidity set point to calculate a demand level.
51 NPEVMBUJPO TP modulation (electric humidifiers) The standard form of modulation with an electric humidifier is time proportioning (TP) modulation. With TP modulation, the outputs cycle on and off at a certain rate to approximate humidifier demand as the example below illustrates. To calculate the example, imagine that each contactor represents 25% of the output of the humidifier. With a 55% system demand, you need two full contactors plus 5/25 of a third contactor.
SSR modulation DRI-STEEM electric humidifiers are available with two basic types of solid state relay (SSR) modulation: SSR modulation with contactors and 100% SSR modulation. SSR modulation with contactor sequence On systems that employ SSR modulation with contactors, the operation of the unit is the same as with TP modulation. In this scenario, one of the cycling contactors is replaced with an SSR. The SSR now is the device that carries out all of the cycling duties.
7B M W F B O E C V S O F S N P E V M B U J P O STS and LTS valve modulation With a valve system, the demand signal simply determines how far the valve strokes. In other words, if the system demand is 25%, the valve strokes 25%. GTS burner modulation A GTS burner assembly consists of a variable speed blower, a constant air/gas ratio modulating gas valve, and a burner. The burner output modulates from its minimum capacity up to its full-rated capacity.
8 B U F S M F W F M D P O U S P M T U B O E B S E XBUFS NPEFMT Figure 8-1: Water level control for standard water systems A B C Probe system Standard or softened water systems use conductivity probes to measure and control water levels for optimum operating efficiency. Water conductivity must be at least 100 μS/cm for the probe system to operate.
8B U F S M F W F M D P O U SP M % * 3 0 N P E F M T Float valve system DI/RO water systems (except for steam injection) use a float valve system to control water levels for optimum operating efficiency. DI/RO systems are used where water/steam purity is important, where demineralized water is needed to improve performance or lessen maintenance requirements, or where a potable water source has minimal or no conductivity, thus requiring a float rather than a probe to sense water levels.
*OTUBMMJOH UIF LFZQBE EJTQMBZ Keypad/display installation t *OTUBMMJOH NPEVMBS DBCMF The six-wire RJ-11 plug/cable provides AC power to the keypad/ display and completes the FTT-10A digital communication between the keypad/display and the Vapor-logic3 control board. t *OTUBMMJOH UIF LFZQBE EJTQMBZ Note that the keypad/display requires an ambient temperature range of 32 °F to 122 °F (0 °C to 50 °C) to operate properly.
Main control board connections Figure 11-1: Vapor-logic3 main control board Testing input configuration: Measure 1-5 VDC across terminals 22-23 for 4-20 mA signal by others or 4-20 mA transmitter. Measure 21 VDC for on-off control when open and 0 VDC for on-off control when closed. For VAV/duct RH or temp comp inputs measurements are the same. VL3-OM-010 DRI-STEEM Vapor-logic 3 *OTUBMMBUJPO BOE 0QFSBUJPO .
Main control board connections Vapor-logic3 main control board connections J1 Wire terminal supplies 24 VAC to power the Vapor-logic3 control board. t %PVCMF UFSNJOBM 5 UP 7"$ 7" NBYJNVN MPBE t 5SJQMF UFSNJOBM 5 UP 7"$ DPNNPO J2 RJ-11 female modular jack connection for supply voltage and FTT-10A communication to keypad/display J3 RJ-45 female modular jack connection for FTT-10A communication J4 Wire terminal connection for FTT-10A communication to LonTalk network.
Main control board connections, continued Important note about J14/J17, J15/J18, and J16/J19 All external wiring connection diagrams show shunts on J14/J17, J15/J18, and J16/J19. The shunts and appropriate software are configured by DRI-STEEM based on original customer orders. Field modification of these shunts requires control input modification: See Page 31, “Changing control input.
Main control board connections, continued J22 Wire terminal connection allows for remote fault indication via isolated relay contacts (1 amp max.). Terminal 10 is the isolated common connection; terminal 9 provides the normally closed connection, and terminal 11 provides the normally open connection. J23 Wire terminal connection provides optically isolated input connections for the airflow proving switch and safety interlock circuit.
GTS expansion board connections Figure 15-1: GTS expansion board VL3-OM-003 J1 ¼" push-on connector for earth ground J2 Combustion air blower 2 control t 5FSNJOBM 1PTJUJWF QPMBSJUZ 7%$ TVQQMZ N" max.) t 5FSNJOBM #MPXFS UBDIPNFUFS GFFECBDL t 5FSNJOBM 1VMTF XJEUI NPEVMBUJPO TQFFE DPNNBOE UP blower t 5FSNJOBM $PNNPO J3 Combustion air blower 1 control t 5FSNJOBM 1PTJUJWF QPMBSJUZ 7%$ TVQQMZ N" max.
GTS expansion board connections, continued J4 Important: When this jumper is left open, the GTS expansion module is configured to control burners 1 and 2. When jumped, the module is configured to control burners 3 and 4. J5 Ribbon cable connector for Vapor-logic3 main controller connection J6 Ribbon cable connector for additional Vapor-logic3 expansion modules J7 Wire terminal supplies 24 VAC to power the GTS expansion module.
Va p o r s t r e a m e x p a n s i o n b o a r d connections J1 1¼" (6.4 mm) push-on connector for earth ground J2 Not used J3 Ribbon cable connector for Vapor-logic3 main controller connection J4 Ribbon cable connector for additional Vapor-logic3 expansion modules J5 Wire terminal supplies 24 VAC to power the Vaporstream expansion module.
Installation checklist Before installing your Vapor-logic3 control system, review this checklist to ensure proper installation of the product. Failure to follow the recommendations listed below could result in failure or damage to the humidifier or microprocessor. ☐ Before you start, read this manual and information. ☐ See wiring diagram and information located inside the control cabinet door. Return all information to the control cabinet after installation.
Ty p i c a l i n s t a l l a t i o n Figure 19-1: Typical humidification system layout Line voltage Dispersion assembly 24 VAC control wiring Electrical supply Keypad/display Control cabinet Typical humidifier OM-3007 DRI-STEEM Vapor-logic 3 *OTUBMMBUJPO BOE 0QFSBUJPO .
(FOFSBM XJSJOH QSPDFEVSFT IMPORTANT: Proper wiring prevents electrical noise Do not use shielded (screened) cable for probe wiring. Electrical noise can produce undesirable effects on electronic control circuits, thereby affecting controllability. Electrical noise is generated by electrical equipment such as inductive loads, electric motors, solenoid coils, welding machinery, or fluorescent light circuits.
(FOFSBM XJSJOH QSPDFEVSFT continued t 8IFO XJSJOH FYUFSOBM FMFDUSJDBM DPOOFDUJPOT UP IVNJEJTUBUT room/duct humidity and temperature transmitters, or control signal input connections from a building control system, use 18-gauge (1 mm2) (minimum) plenum-rated, twisted-pair wire, with cable shield (screen) wire for grounding. t 3FUVSO BMM TIJFMEFE TDSFFOFE DBCMF DPOOFDUJPOT UP UIF DPOUSPM cabinet for grounding. Do not ground shield (screen) at the device end.
Control cabinet connections Control cabinet installation and wiring The Vapor-logic3 control board is shipped mounted with all internal wiring completed within a control cabinet. All software is custom programmed into your Vapor-logic3 system according to the original order requirements. Some control cabinets are factory mounted on the humidifier. Vapormist and Humidi-tech control components are located under the shroud.
Control cabinet connections, continued Vaporstream control cabinet Figure 23-1: Vaporstream control cabinet penetration locations Low voltage conduit knockout Allow minimum of 36" (914 mm) from front of cabinet for access Incoming power conduit knockout.
Control cabinet connections, continued STS and LTS control cabinet Control cabinets for all STS and LTS humidifiers are shipped loose. An available option is to order the cabinet mounted and wired to the humidifier. GTS control connections GTS control components are an integral part of the GTS humidifier assembly. Knockouts are located on the front of the humidifier below the keypad. Conduit penetrations are made by installer. Choose the high voltage conduit location closest to power terminals.
4 F O T P S E F W J D F Q M B D F N F O U B O E IVNJEJUZ DPOUSPM PWFSWJFX Recommended sensor locations Other factors that affect humidity control Sensor or transmitter location has a significant impact on humidifier performance. In most cases, we recommend that you do not interchange duct and room humidity devices. Room humidity devices are calibrated with zero or little airflow; whereas duct humidity devices require air passing across them.
8JSJOH TFOTPS EFWJDFT /PU Figure 26-1: Vapor-logic3 input wiring detail of a typical system configuration OM-2027 Notes: t 5IJT ESBXJOH TIPXT B UZQJDBM TZTUFN DPOmHVSBUJPO UIBU JODMVEFT B EVDU BJSnPX TXJUDI B XBMM NPVOUFE IVNJEJUZ USBOTNJUUFS N" BO PO PGG IJHI limit switch, and a temperature compensation transmitter (4-20 mA). See the following pages in this manual for other input wiring instructions.
Installation: Wiring detail Calculation of transmitter % RH Wiring on-off humidistats DRI-STEEM provides two types of on-off control: wall-mounted humidistat and duct-mounted humidistat. On-off control can also be achieved using a signal from another source, such as a building automation system (signal by others). The wiring diagram (located on the inside of the humidifier control cabinet) shows proper wiring for these controls. 3) (mA reading) – 4 0.16 Example: 12 mA – 4 0.
8JSJOH TFOTPS EFWJDFT DPOUJOVFE Variable air volume (VAV) option This option is identified as a “V” in the third-from-last place of your program code configuration string (for example: EV11400285A7VOX). See Pages 32-33 for more information about the program code configuration string. When the VAV control option is requested, DRI-STEEM provides a duct mounted humidity transmitter (4 to 20 mA output, 0 to 100% RH range). Install using shielded cable (see Figure 28-1).
8JSJOH TFOTPS EFWJDFT DPOUJOVFE Temperature compensation offset option This option is identified as a “T” in the second-from-last place of your program code configuration string (for example: EV11400285A7OTX). When selected as an option, DRI-STEEM provides a temperature compensation (temp. comp.) transmitter. The temperature compensation transmitter continually monitors interior window glass temperature and transmits this temperature to Vapor-logic3.
8JSJOH TFOTPS EFWJDFT DPOUJOVFE Temperature compensation transmitter placement To place the temperature compensation transmitter, follow these steps. See Figure 30-1 below. 1. Position the temperature compensation transmitter control box on a wall adjacent to a window frame facing north or northeast. 2. Place flat surface of temperature sensor tip on lower corner of glass surface. 3. Temporarily hold the sensor tip in place with strips of masking tape. 4.
8JSJOH TFOTPS EFWJDFT DPOUJOVFE Changing control input You can configure the control input on the Vapor-logic3 board to read either an external demand signal or RH signal. It also can read different types of analog signals from building automation systems, humidistats, or RH transmitters. Follow these steps when a signal change is needed: Figure 31-1: Vapor-logic3 main control board detail Jumper connectors: R = Resistive input I = Current input V = Voltage input 1.
Configuration string programming 'JSNXBSF WFSTJPOT Y Y Y Y Y Y BOE Y Y POMZ Important: Vapor-logic3 configuration string * For Vapor-logic3 firmware versions 5.x.x and 7.x.x (systems with multitank capability) see Pages 50-51 for configuration string settings. A Type of units: & 6 4 &OHMJTI JODI QPVOE . .
Configuration string programming, continued 'JSNXBSF WFSTJPOT Y Y Y Y Y Y BOE Y Y POMZ Important: H Operating mode 4JOHMF TUBHFE &YUFSOBMMZ TUBHFE 443 BEEFE JO WFSTJPO TUSJOH MFUUFS & JEFOUJGJFT number of heat stage contactors when 100% SSR) (54 5JNF QSPQPSUJPOJOH 51 443 443 TFRVFODJOH 4UFBN WBMWF * For Vapor-logic3 firmware versions 5.x.x and 7.x.x (systems with multitank capability) see Pages 50-51 for configuration string settings.
I n t e r o p e r a b i l i t y u s i n g L o n Ta l k The Vapor-logic3 controller uses LonTalk as its field bus protocol, which enables previously disparate systems and products to interoperate by providing communication through Standard Network Variable Types or SNVTs (“snivits”). Any device can be installed on a network and logically connected to other devices via SNVTs as long as the SNVTs are the same type.
C o n n e c t i n g L o n Ta l k Connect the keypad/display Important: Requirements: Lon network manager software (user should be proficient with the Lon network manager software). LonMaker prohibits commissioning into domain 0 (zero). Customers using network managers other than LonMaker must ensure that the domain of their network is not 0 (zero) before commissioning Vapor-logic3 nodes.
C o n n e c t i n g L o n Ta l k , c o n t i n u e d Figure 36-1: LonMaker example Figure 36-2: LonMaker New Device Wizard 1BHF t %3* 45&&.
C o n n e c t i n g L o n Ta l k , c o n t i n u e d 3. If using the service pin to identify the board on the network, press the service pin (next to the blinking LED on the main board). Figure 37-1: Display service pin and LED locations 4. Repeat steps 1–3 for the display. The service pin for the display is an unmarked key on the keypad (see Figure 37-1). Add a functional block 1. Drag and drop a “Functional Block” to the LonMaker drawing window (see figure on Page 36). 2.
- P O 5B M L / F U X P S L W B S J B C M F B O E DPOGJHVSBUJPO JOQVUT OWJ BOE ODJ Table 38-1: LonTalk network variable inputs (nvi) available with Vapor-logic3 nvi SNVT Description nviTimeStamp 4/75@UJNF@TUBNQ Set the date and time of day. nviMode 4/75@DPVOU 4FU UIF NPEF PS DVSSFOU TUBUVT PG UIF IVNJEJmFS 5IF EFmOFE PQUJPOT BSF 1. Auto 2. Standby 3. Drain (manual) OWJ4QBDF@41 4/75@MFW@QFSDFOU Set the humidity set point for the space being humidified.
- P O 5B M L / F U X P S L W B S J B C M F P V U Q V U T OWP Table 39-1: LonTalk network variable outputs (nvo) available with Vapor-logic3 nvo SNVT Description nvoTimeStamp 4/75@UJNF@TUBNQ Read the current date and time that the unit is set to. nvoMode 4/75@DPVOU 3FBE UIF DVSSFOU NPEF PG UIF VOJU 5IF EFmOFE PQUJPOT BSF 1. Auto 2. Standby 3. Drain (manual) OWP4QBDF@3) 4/75@MFW@QFSDFOU Read the relative humidity content of the air in the space being humidified (percent RH).
- P O 5B M L / F U X P S L W B S J B C M F P V U Q V U T OWP DPOUJOVFE Table 40-1 (continued): LonTalk network variable outputs (nvo) available with Vapor-logic3 nvo SNVT Description nvoAlarm 4/75@BMBSN These outputs are expressed using a 64-bit map. The user will see a 64-bit number of 1s and 0s.
- P O 5B M L / F U X P S L W B S J B C M F P V U Q V U T OWP%JHJUBM@*0 Table 41-1: Vapor-logic3 digital input states (nvoDigital_IO) Bit map position 0 Device 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Airflow proving switch External interlock switch On-off high limit switch SDU or Area Type fan control 0 /P airflow Open Open Fan off X X X X X X X X X X X X 1 Airflow Closed Closed Fan on X X X X X X X X X X X X 0 0 0 1 0 0 0 0 1 0 0 0 State Ex
Multiple tank configurations: Introduction Important: One master controller, multiple slave tanks Information on this page applies to Vapor-logic3 firmware versions 5.x.x and 7.x.x only (systems with multi-tank capability). Vapor-logic3 has the capability to operate multiple DRI-STEEM humidifier tanks under the control of one Vapor-logic3 controller. This is called operating in multi-tank mode.
Multiple tank configurations: 1SJPSJUZ HSPVQT Priority groups Important: All humidifier tanks in a multi-tank group are assigned to a priority group. There are four priority groups: 0, 1, 2, and 3. Information on this page applies to Vapor-logic3 firmware versions 5.x.x and 7.x.x only (systems with multi-tank capability). The purpose of priority groups is to identify tanks as trim tanks or redundant tanks, and/or to define fuel or other preferences.
Multiple tank configurations: 8FBS MFWFMJOH GBVMU UPMFSBODF Important: Tank wear leveling Information on this page applies to Vapor-logic3 firmware versions 5.x.x and 7.x.x only (systems with multi-tank capability). The master controller monitors tank wear and assigns steam production to tanks to equalize wear as much as possible within the multi-tank group. The Vapor-logic3 controller calculates tank wear by dividing the amount of steam produced by the internal surface area of each tank.
Multiple tank configurations: Installation To install a multi-tank group, read the following instructions: Important: 1. Make wiring connections. a. Determine which control board is the master controller and connect all required control inputs to that board by following the instructions in this manual beginning on Page 10. b.
Multiple tank configurations: Multi-tank status screen Figure 46-1: Multi-tank status screen Current total output is 27% of system capacity Current total output is 120 lbs/hr Total system demand is 121 lbs/hr 5BOL OBNF " other readouts are 1, B through P 5BOL TUBUVT Steaming; other readouts are warm, preheating, cold, draining, off-line 1SJPSJUZ HSPVQ OVNCFS other readouts are 1, 2, or 3 Tank output is 20% of its capacity Current demand for this tank is 20 lbs/hr 5ZQF PG UBOL .
Multiple tank configurations: 6TJOH UIF LFZQBE EJTQMBZ Using the keypad/display Important: The keypad/display communicates with every humidifier tank's controller in the multi-tank group.
Multiple tank configurations: Configuring humidifier tanks Important: Information on this page applies to Vapor-logic3 firmware versions 5.x.x and 7.x.x only (systems with multi-tank capability). Humidifier tanks ordered as a multi-tank group are configured at the factory.
Multiple tank configurations: Configuring humidifier tanks to communicate with the same (renamed) tank. For convenience when using the Multi-Tank status screen, we recommend that the tank names not skip any letters, but this is not a requirement. 8. If the priority group setting for this tank is to be changed, it can be done now. This is done by setting the priority group number in the fourth digit of the configuration string (see Figure 48-1). Note: The default priority group is 1. 9.
Multi-tank configuration string 'JSNXBSF WFSTJPOT Y Y BOE Y Y POMZ Important: Vapor-logic3 configuration string * For Vapor-logic3 firmware versions other than 5.x.x and 7.x.x (systems without multi-tank capability) see Pages 32-33 for configuration string settings. A Type of units: & 6 4 &OHMJTI JODI QPVOE . .
Multi-tank configuration string, continued 'JSNXBSF WFSTJPOT Y Y BOE Y Y POMZ Important: H Operating mode 4JOHMF TUBHFE &YUFSOBMMZ TUBHFE 443 TUSJOH MFUUFS & JEFOUJGJFT OVNCFS PG IFBU TUBHF contactors when 100% SSR) (54 5JNF QSPQPSUJPOJOH 51 443 443 TFRVFODJOH 4UFBN WBMWF * For Vapor-logic3 firmware versions other than 5.x.x and 7.x.x (systems without multi-tank capability) see Pages 32-33 for configuration string settings.
Using the keypad Figure 52-1: Vapor-logic3 keypad/display Components of the keypad/display The Vapor-logic3 keypad/display (see Figure 52-1) consists of : t " ¨ QJYFM CBDLMJU MJRVJE DSZTUBM EJTQMBZ -$% t " QPXFS MJHIU t "O BMBSN MJHIU t &JHIU LFZT – Four arrow keys – An Enter key – Three soft keys The three soft keys are located directly beneath the LCD. Each soft key’s function is determined by the screen currently displayed. The function appears on the screen directly above each soft key.
Using the keypad, continued The menu system The Vapor-logic3 keypad/display organizes the control and monitoring of the humidification system into six top-level menus: t 4UBUVT t $POUSPM .PEFT t "MBSNT t 4FU 6Q t %JBHOPTUJDT t 3FQPSUT WFSTJPOT VQ UP Y Y PS .5 4UBUVT WFSTJPOT Y Y Each of these menus controls or monitors a different aspect of the humidifier. To access any of these screens, activate the Main Menu of the keypad by pressing the Main soft key whenever it is visible.
.FOV TUSVDUVSF PWFSWJFX GPS WFSTJPOT Y Y Y Y Y Y BOE Y Y POMZ Main Menu (Soft key) Idle (Soft key) Main – Returns to the Main Menu screen (Soft key) Control – Switches display to the Control Modes screen (Soft key) Alarms – Switches display to the Alarms screen 1 Status (Soft key) Main – Returns to the Main Menu screen (Soft key) Back – Scrolls to the previous Status item (Soft key) Next – Scrolls to the next Status item 2 Control Modes 1 Auto Mode 2 Test Mode Test Status (only on Version 3.0.
.FOV TUSVDUVSF PWFSWJFX GPS WFSTJPOT Y Y BOE Y Y POMZ Main Menu (Soft key) Idle (Soft key) Main – Returns to the Main Menu screen (Soft key) Control – Switches display to the Control Modes screen (Soft key) Alarms – Switches display to the Alarms screen 1 Status (Soft key) Main – Returns to the Main Menu screen (Soft key) Back – Scrolls to the previous Status item (Soft key) Next – Scrolls to the next Status item 2 Control Modes 1 Auto Mode 2 Test Mode Test Status (only on Version 3.0.
Main menu: Idle screen Idle Screen The Idle screen provides a convenient way to monitor the humidifier’s basic operation. Depending on system options, the system set point, the actual space condition, and/or the system demand predominantly appear on the Idle screen. This is the Idle Screen displayed with Vapor-logic3 versions 2.x.x, 3.x.x, 4.x.x and 6.x.x The top line of the display shows the current mode of the humidifier: Auto, Test, Standby, or Manual Drain. For Vapor-logic3 versions 5.x.
Idle screen status messages Table 57-1: Idle screen status messages Readout display xref Description Filling The unit is filling with water. Skimming The unit completed a fill cycle and now is skimming. Draining The unit is draining. Flushing The unit is flushing. /P %VDU "JS 'MPX The airflow proving switch is open and has disabled the humidifier (terminals 12 and 13). Interlock Disable The interlock circuit is open and has disabled the humidifier (terminals 14 and 15).
Main menu: Status screen Status Use the Status screen to view the operating parameters of the humidification system. The configuration string determines which parameters appear. The parameters that can appear are listed below: t 3) 4FUQPJOU t 3PPN 3) t %FXQPJOU 4FUQPJOU t .
Main menu: Control modes screen Control modes Use the Control Modes screen to set the operational mode of the humidifier. You can choose from auto, test, standby, or manual drain. *O "VUP .PEF the humidifier operates normally. All inputs and outputs are monitored and controlled. If there is a call for humidification, the system reacts. *O 5FTU .PEF the controller sequentially cycles on each of the 24 VAC outputs for four seconds (30 seconds for the drain valve) so that their operation can be confirmed.
Main menu: Alarms screen Alarms screen Use the Alarms screen to clear system alarms and to view the alarm log. To scroll through the alarm log, use the vertical arrow keys. The alarm log contains a record of the previous 10 faults (alarms) that occurred on the humidifier. The first column displays the alarm name. The second column displays the status of the alarm. When viewing the alarm log, only the first alarm (which is highlighted) is active.
Fault messages Tank level fault (previous name: Fill Time Fault) The Vapor-logic3 controller keeps track of how much water converts to steam. If this total amount exceeds a preset limit without energizing the fill valve, the controller assumes a low water condition is present. This shuts down the humidifier and logs a tank level fault. The humidifier will not resume operation until you clear this fault. Each time the fill valve energizes, the total is reset to zero.
Fault messages, continued t Tank level fault (Tank Level Flt) (previous name: Fill Time Flt) The unit has run too long without the fill valve opening. Fill valve may be stuck open, heating devices may be damaged, or heater control may be faulty. t Low level probe fault (LL Probe Fault) The sensor has indicated that the water in the tank reached the middle or top probe without reaching the lower probe. t .
Main menu: System Set Up screen System Set Up Use the System Set Up screen to set the operational parameters of the humidifier. To modify a value, use the Next and Back soft keys to locate the parameter you want to change. Once the parameter is located, use the vertical arrow keys (or + and – keys) to change values; use the left and right arrow keys to move to a different digit on the parameter being modified.
Main menu: Set Up screen, continued Table 64-1: Set Up menu information Set Up menu parameter Set Up menu description Range Default ADS Day Day to start ADS sequence Sunday (1) through Saturday (7) 1 ADS Hour Hour to start ADS sequence UP NJEOJHIU UP QN 0 ADS Interval /VNCFS PG EBZT CFUXFFO "%4 DZDMFT 1 day to 180 days 1 day ADS Duration Auto drain sequence duration 0 minutes to 120 minutes 4ZTUFN EFQFOEFOU STS 14 mins. GTS 18 mins. Vaporstream 12 mins.
Adjusting set point Adjusting set point through the Set Up menu You can adjust your unit’s set point using the Set Up menu, which is under the Main menu (see the menu structure diagram on Pages 54-55). Once you access the Set Up menu, you can adjust a number of parameters including the set point of the unit. To adjust the humidity set point, your unit must be configured for a humidity transmitter. You can enter a desired humidity set point anywhere in the range of 20% to 80%.
1*% UVOJOH Adjusting set point with PID loop When your unit is equipped with a humidity or dew point transmitter, you can adjust and control the set point through the keypad/display, using a proportional, integral, and derivative (PID) control loop. With a PID loop, you can “tune” your system for maximum performance using the proportional (Kp), integral (Ki), and derivative (Kd) gain terms.
1*% UVOJOH DPOUJOVFE The integral term The integral term is an accumulation of RH error over time multiplied by the integral gain. The way this works is as follows: every ½ second when the demand is updated, the instantaneous RH error (RH set point – actual RH) is added to a temporary variable that accumulates the error. This accumulated error is multiplied by the integral gain to create the integral term. The integral gain affects how fast the humidifier corrects a droop condition.
1*% UVOJOH DPOUJOVFE The derivative term The derivative term is the measured change in error over time multiplied by the derivative gain (differentiating error with respect to time). Its basic operation is as follows: if the actual measured RH is below set point and is rising, the derivative term subtracts from the demand in anticipation of the approaching set point.
1*% UVOJOH DPOUJOVFE PID setup tips Kp = Proportional gain factor A large PID band (10% to 20%) yields tighter and more stable control with longer response times. A small PID band produces quicker response times, but control may become unstable if the RH regularly goes outside the band. Ki = Integral gain factor Kd = Derivative gain factor As a rule, start with a PID band of 10%. When the humidifier is operating at steady state, make sure the RH does not go outside the PID band.
VA V, t e m p c o m p c o n t r o l o p e r a t i o n VAV control With VAV control, the system is equipped with a duct RH transmitter. This transmitter monitors the RH in the duct downstream from the steam dispersion unit and transmits the duct RH to the Vapor-logic3 controller. The controller then compares the measured duct RH with the high limit set point (Duct High Lim RH), which is entered through the keypad/display in the Set Up screen.
% F X Q P J O U D P O U S P M U B O L Q S F I F B U operation Dew point control Dew point control functions in exactly the same way as RH control except the dew point is being measured instead of the RH. The dew point transmitter sends a signal to the Vapor-logic3 controller. Users can modify the dew point set point and PID parameters through the keypad/display just as they can with an RH transmitter.
Aquastat, freeze protection operation Aquastat operation The aquastat set point is the minimum tank temperature the Vapor-logic3 controller should maintain when there is no call for humidity. It is adjusted through the Set Up screen. This feature shortens the tank preheat time, which provides an even quicker response to a call for humidity.
4%6 GBO PQFSBUJPO TFOTPS PGGTFUT SDU operation If your humidifier is equipped with a Space Distribution Unit (SDU) or an Area-type fan, it is enabled after the Vapor-logic3 receives a call for humidity and the tank temperature rises above 150 °F (66 °C). When the humidifier no longer receives a call for humidity, it stops heating and the SDU or Area-type fan continues to run for the SDU Duration to ensure that steam gets dispersed.
"VUPNBUJD ESBJO TFRVFODF "%4 Automatic drain sequence for potable water (not softened) Table 74-1: System-dependent defaults for automatic drain sequence (ADS) Humidifier ADS duration (drain time in minutes) AFS duration (flush time in minutes) Vapormist 8 1 Humidi-tech 8 1 CRUV 8 1 Vaporstream 12 1 STS 14 1 LTS 14 1 GTS 18 1 When configured to run a potable water humidifier with an automatic drain valve, Vapor-logic3 uses an automatic drain sequence (ADS) to help reduce mineral acc
"VUPNBUJD ESBJO TFRVFODF "%4 continued *OUFSWBM When the ADS mode is set to “Interval,” the humidifier enters a drain and flush sequence after a user-defined interval of time, ignoring the amount of water converted to steam. The interval is established by setting the “ADS day,” “ADS hour,” and “ADS interval” parameters in the Set Up menu (the “Lbs of H2O until ADS” parameter is not used when the ADS mode is set to Interval). Once the ADS day is reached, the drain and flush occurs at the ADS hour.
"VUPNBUJD ESBJO TFRVFODF "%4 FOE PG TFBTPO ESBJOJOH &04 Draining when using softened water When using softened water and when the program code indicates either “S” or “T” for the “Type of water level control” being used (see the configuration string nomenclature on Pages 32 and 33), then draining occurs for a one-minute duration every 28 days to remove residue from the drain valve mechanism. End-of-season draining occurs as described below.
4 F S W J D F J O U F S W B M T F U U J O H E B U F B O E time Service interval The Vapor-logic3 controller tracks the amount of water converted to steam by the humidifier. When the amount of water converted to steam exceeds the Service set point (a user-defined amount of water in pounds or kilograms adjusted in the system Set Up screen), the “Service Humidifier” message appears on the Idle screen. The humidifier continues to operate after the message appears.
Main menu: Diagnostics screen Diagnostics The Diagnostics screen allows you to monitor all of the analog and discrete inputs to the Vapor-logic3 control system. Use the Next and Back to scroll through the input signals on your system. The Diagnostics screen is useful when troubleshooting. For example, to troubleshoot the RH signal input, select RH Signal on the Diagnostics screen. The screen displays the input signal in milliamps and what this signal translates to in terms of relative humidity.
Main menu: Reports screen Reports The Reports menu displays up to four report options to help the user gain historical data on the humidification system. Information contained in each report is explained below. The Reports menu is not available with Vapor-logic3 versions 5.x.x and 7.x.x (systems with multi-tank configuration capability). Water usage report The Water Used report displays how many pounds (kilograms) have been converted to steam in the humidifier. For Vapor-logic3 versions 3.0.
Main menu: Reports screen, continued Figure 80-1: Oscillating RH demand graph RH/dew point/demand graph The RH (or dew point or demand) graph provides a graphical depiction of RH change over time. Examples of this are shown in Figures 80: 1–3. The vertical axis either displays RH in 1% increments, dew point in 1 degree increments, or demand in 2.5% increments depending on system configuration. On the RH graph, the RH set point is denoted by SP in the middle of the vertical axis.
Start-up checklist Your humidification system may not have all of the options listed below. If an item does not apply to your system, skip to the next item and continue the process. ☐ Before you start, read this manual and other information sent with your humidifier. ☐ Verify that the field wiring is done per the instructions in this manual and per the unit wiring diagram. ☐ If your humidifier uses potable or softened water (non-DI water), check probe voltages in the Diagnostics menu.
Start-up checklist, continued Start-up checklist (continued) ☐ Check the flush duration (default is 1 minute). ☐ Check the RH set point and set at the desired level. ☐ Confirm that the control input signal is consistent with the Vapor-logic3 configuration string. Identify the factory-set Vapor-logic3 configuration string on the wiring diagram or on the outside of the control cabinet door. Refer to the configuration string descriptions on Pages 32 and 33.
Start-up checklist, continued Start-up checklist (continued) ☐ Confirm that the high limit humidistat input is closed or that the variable air volume (VAV) control system high limit transmitter is connected. *.1035"/5 $POGJSN UIBU UIF UBOL IBT TVGGJDJFOU XBUFS If the tank does not contain water and the heat outputs are activated, or the burners are fired by the Vapor-logic3 control system, a serious failure will result.
Tr o u b l e s h o o t i n g i n t r o d u c t i o n 1. Review troubleshooting index. If you have a control-related problem, first check the problem list in this section. If you have a tank-related or dispersion-related problem, you may also need to refer to those specific product manuals. 2. Review possible causes and recommended actions. The troubleshooting guide on the following pages presents possible causes and recommended actions for typical problems. 3. If you’re still having problems, call us.
Index to troubleshooting guide Below is an index to possible control-related problems described on the following pages. To find solutions, refer to the page number.
Tr o u b l e s h o o t i n g g u i d e Table 86-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Green power indicator light is off t /P DPOUSPM WPMUBHF t $IFDL GPS QSPQFS TVQQMZ WPMUBHF t )FBUFS GVTFT PQFO t $IFDL IFBUFS GVTFT GPS WPMUBHF QSFTFOU BU USBOTGPSNFS t 5SBOTGPSNFS TFDPOEBSZ DJSDVJU breaker tripped t $IFDL GPS XJSJOH TIPSUT SFTFU CSFBLFS t 'JFME XJSJOH OPU JOTUBMMFE t 1SPWJEF mFME XJSJOH UP B SFNPUF GBVMU JOEJDBUPS GSPN Vapor-logic3 terminal block J22 (se
Tr o u b l e s h o o t i n g g u i d e Table 87-1: Vapor-logic3 troubleshooting guide Problem Possible cause Fill fault In fill sequence, Vapor-logic3 allows 40 minutes for the water to reach the maximum upper water level. If the water does not reach the designated level, and the probe system is not satisfied, a fault is indicated. Tank is not full Action t 'JMM BOE ESBJO WBMWF XJSJOH BSF reversed.
Tr o u b l e s h o o t i n g g u i d e Table 88-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Drain fault t 5BOL ESBJO PVUMFU t *G UIF IVNJEJmFS UBOL ESBJO PVUMFU JT QMVHHFE DMFBO t 8BUFS EFUFDUJPO QSPCFT t $MFBO QSPCF PS SFQMBDF QSPCF SPE BTTFNCMZ t %SBJO WBMWF XJSJOH t $IFDL ESBJO WBMWF XJSJOH t $IFDL UP CF TVSF ESBJO WBMWF JT XJSFE UP UFSNJOBMT BOE on control board. t 3FTFU 7BQPS MPHJD3.
Tr o u b l e s h o o t i n g g u i d e Table 89-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Low level probe fault (LL probe fault) t -PX DPOEVDUJWJUZ XBUFS TVQQMZ t *G DPOEVDUJWJUZ JT MFTT UIBO 4 DN BEE TBMU UP JODSFBTF conductivity. Consult DRI-STEEM for further advice. t .FBTVSF 7"$ GSPN QSPCFT UP HSPVOE XIFO XBUFS JT JO contact with probes. t %JSUZ PS PYJEJ[FE QSPCFT t $MFBO QSPCF SFNPWJOH PYJEBUJPO BOE PS NJOFSBMT PS replace if needed.
Tr o u b l e s h o o t i n g g u i d e Table 90-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action ”Clean probes and tank” message t -PX XBUFS DPOEVDUJWJUZ t $IFDL DPOEVDUJWJUZ 8BUFS DPOEVDUJWJUZ NVTU CF BU MFBTU 100 μS/cm. If conductivity is low, add salt to increase conductivity. Consult DRI-STEEM for further advice. appears on idle screen xreftag t 4ZTUFN EFUFDUFE B OFFE UP DMFBO PS t 3FNPWF BOE DMFBO QSPCF SPET replace probe.
Tr o u b l e s h o o t i n g g u i d e Table 91-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Probe assembly fault (Probe Assy Flt) xreftag t %FUFSJPSBUJPO PG QSPCF SPE assembly t 3FQMBDF QSPCF SPE BTTFNCMZ t )VNJEJmFS JOUFSMPDL TXJUDIFT BOE or over-temperature thermostat t 7FSJGZ UIBU TXJUDI PS UIFSNPTUBU JT XJSFE t 7FSJGZ JOUFSMPDL TXJUDI JT TFU DPSSFDUMZ BOE IVNJEJmFS DPWFS is on.
Tr o u b l e s h o o t i n g g u i d e Table 92-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action (BT WBMWF GBVMU t 'BJMFE JHOJUJPO NPEVMF t .JTXJSFE HBT WBMWF t $IFDL JHOJUJPO NPEVMF t $IFDL HBT WBMWF XJSJOH #VSOFS GBVMU xreftag t /P HBT TVQQMZ UP VOJU t 7FSJGZ UIBU HBT TFSWJDF WBMWF JT PO BOE SFDFJWJOH NJOJNVN pressure to manifold per rating plate. t (BT WBMWF JT PGG PS UIFSF JT OP power to the valve.
Tr o u b l e s h o o t i n g g u i d e Table 93-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Unit does not fill with water. xreftag t .BMGVODUJPOJOH mMM WBMWF t 6OQMVH QSPCF IFBE 'JMM WBMWF TIPVME PQFO *G mMM WBMWF does not open, verify proper 24 VAC (terminals 1 and 2) to fill valve. If voltage is present and valve does not open, replace valve or valve coil.
Tr o u b l e s h o o t i n g g u i d e Table 94-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Fill valve does not close. t 0QFO ESBJO WBMWF t *G BVUPNBUJD ESBJO WBMWF JT MPDLFE JO UIF NBOVBM PQFO position, reset to automatic. t 3FQMBDF WBMWF JG UIFSF JT B CSPLFO SFUVSO TQSJOH PO UIF drain valve. t $MFBO PS SFQMBDF ESBJO WBMWF JG BO PCTUSVDUJPO JO UIF WBMWF does not allow complete closure.
Tr o u b l e s h o o t i n g g u i d e Table 95-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Reduced or no output (even though water level is correct). &MFDUSJD VOJUT t )FBUFS NBMGVODUJPOJOH t 7FSJGZ UIBU QSPQFS WPMUBHF JT CFJOH BQQMJFE UP IFBUFST t 7FSJGZ IFBUFS BNQFSBHF NBUDIFT XJSJOH EJBHSBN t *G IFBUFS DPOUBDUPS JT OPU GVODUJPOJOH SFQMBDF &MFDUSJD VOJUT t .
Tr o u b l e s h o o t i n g g u i d e Table 96-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Heater burnout t 8BUFS MFWFM JT UPP MPX t 3FQMBDF QSPCFT t *NQSPQFS XJSJOH t 7FSJGZ QSPQFS WPMUBHF BQQMJFE UP IFBUFS t 7FSJGZ QSPQFS FMFDUSJDBM DPOOFDUJPOT t .JOFSBM CVJMEVQ PO IFBUFST t 5IF IVNJEJmFS NBZ CF VOEFSTJ[FE *ODSFBTF IVNJEJmFS capacity or replace with larger humidifier. Consult DRI-STEEM. t *OTQFDU UBOL GPS TFWFSF NJOFSBM CVJMEVQ PO PS BSPVOE heater.
Tr o u b l e s h o o t i n g g u i d e Table 97-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Humidity is below desired level. t 6OJU JT PQFSBUJOH CVU GBJMT UP NFFU required humidity level. t 6OJU VOEFSTJ[FE SFQMBDF XJUI B MBSHFS VOJU PS BEE additional humidifier. t 4LJN EVSBUJPO JT UPP MPOH t *G ESBJO WBMWF EPFT OPU DMPTF GVMMZ EFUFSNJOF UIF DBVTF BOE clean, repair, or replace as needed.
Tr o u b l e s h o o t i n g g u i d e Table 98-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Humidity above set point t )JHI FOUFSJOH SFMBUJWF IVNJEJUZ t %FIVNJEJGZ t 6OJU PWFSTJ[FE t $POTVMU %3* 45&&. t 3FEVDFE BJSnPX t $IFDL GBOT EBNQFST 7"7 TZTUFNT FUD t *NQSPQFSMZ MPDBUFE IVNJEJTUBU PS humidity transmitters t 3FMPDBUF VTJOH HVJEFMJOFT FTUBCMJTIFE JO UIJT NBOVBM TFF Pages 25 26–33) 31 t .
Tr o u b l e s h o o t i n g g u i d e Table 99-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Tank does not heat up t 0WFS UFNQFSBUVSF UIFSNPTUBU switch located under heater wiring cover tripped t 3FTFU UIFSNPTUBU TXJUDI t )VNJEJmFS DPWFS JOUFSMPDL TXJUDI (Vaporstream models only) t )VNJEJmFS DPWFS OPU XJSFE BEKVTU JOUFSMPDL TXJUDI t $PNCVTUJPO BJS TXJUDI PS QPXFS vent switch (GTS only).
Tr o u b l e s h o o t i n g g u i d e Table 100-1: Vapor-logic3 troubleshooting guide Problem Possible cause Action Unit does not perform end-ofseason drain.
Replacement parts Figure 101-1: Vapor-logic3 replacement parts Figure 101-2: Vapor-logic3 replacement parts 1 4 2 5 3 OM-3007-3 3.x.x 4.x.x 5.x.x 6.x.x 7.x.x VL3-OM-011 Table 101-1: Vapor-logic3 replacement parts No. Description Qty. Part no. for Versions 2.x Part no. for Versions 3.x Part no. for Versions 4.x and 6.x Part no. for Versions 5.x and 7.
Notes 1BHF t %3* 45&&.
Notes DRI-STEEM Vapor-logic 3 *OTUBMMBUJPO BOE 0QFSBUJPO .
Expect quality from the industry leader Two-year Limited Warranty For over 40 years, DRI-STEEM has been leading the industry with creative and reliable humidification solutions. Our focus on quality is evident in the construction of the Vapor-logic3 and an industry-leading Two-year Limited Warranty.
