System 27 NOVA. Modular Electronic Humidity Control System. Feature and Benefits

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1 PSC9717 European Refrigerati Ctrols Catalogue Catalog Secti 2 Product Bulletin W27 System 27 NOVA Modular Electric Humidity Ctrol System Introducti System 27 NOVA is a family of modular electric modules designed for a wide variety of ctrol cfiguratis in refrigerati, heating, ventilati, air-cditiing and other related fields. The humidity ctrol modules can be used as a stand ale device or in cjuncti with other modules such as display modules, signal cverter modules etc. to achieve a wide variety of single or multiple stage applicatis. Typical applicatis are: - computer rooms; - clean rooms; - fruit storage/ripening; - food processing; - industrial processes. System 27 NOVA Modular Humidity Ctrols Descripti The modular ccept was specially designed to make ctrol cfigurati easier and still er the flexibility necessary to answer the many individual ctrol requirements encountered today. Feature and Benefits q Modular design q Plug-in quick cnector wiring system q Adjustable differential and humidificati/dehumidificati setting q Interchangeable humidity transmitters with different housings q Attractive DIN-rail mount housing q Setpoint shift output functi Provides the flexibility to realise the required ctrol set up without redundancy and makes future expansi easy. Eliminates wiring between modules and reduces installati cost. Provides flexibility to match any combinati of heating or cooling applicatis. Matches various applicatis. Easy and quick to install. Modules can be used for multiple setpoint applicatis Johns Ctrols Inc. Catalogue Secti 2

2 2 W27 The System 27 NOVA family includes the following modules: W27 Humidity Ctrol Modules HT-9000 Humidity Sensor These e- or two-stage humidity ctrol modules can be used as a low cost ctrol for stand ale applicatis or, when cnected in parallel, for multistage applicatis. The ctrol output(s)is a single-pole, double-throw (SPDT) relay with LED indicati. It features humidificati and dehumidificati modes of operati and an adjustable differential. D27W Humidity Display Modules A display cnected to a humidity ctrol module gives a digital indicati of the measured humidity or setpoint. It is also possible to cnect a sensor directly to the D27W (the sensor is powered by the D27W). The display can be cnected to a humidity ctrol module very easy by using the quick cnector system. Y27M Signal Cverter This module cverts a voltage input signal to a standardised output signal of 0 to 10 Vdc or 4 to 20 ma. The input signal can either be obtained from a humidity sensor or a humidity ctrol module. The signal cverter can be used for those applicatis where an analogue output is required. Such as; to a motor, motor actuated valve, recorder etc. Sensors are available for room, duct or build-in applicatis. Please refer to the HT-9000 humidity sensor bulletin. Note The System 27 modules are intended to ctrol equipment under normal operating cditis. Where failure or malfuncti of the modules could lead to an abnormal operating cditi that could cause persal injury or damage to the equipment or other property,other devices (limit or safety ctrols) or systems (alarm or supervisory systems) intended to warn of or protect against failure or malfuncti of the modules must be incorporated into and maintained as part of the ctrol system. Applicati examples At page 6 you will find some applicatis examples. For more detailed informati about wiring and adjustment reference should be made to the installati sheets. Repair and Replacement Repair is not possible. In case of an improperly functiing ctrol, please check with your nearest supplier. When ctacting the supplier for a replacement you should state the type-model number of the ctrol. This number can be found the dataplate. Catalogue Secti Johns Ctrols Inc.

3 W27 3 Accessories dim. in mm 30 Fig. 1 WRE027N600 Quick Cnector for cnecting System 27 NOVA modules. Dimensis (mm) Fig. 2 System 27 NOVA Modules 2001 Johns Ctrols Inc. Catalogue Secti 2

4 4 W27 One Stage Humidistat Type Number Selecti Table W27 Humidity Ctrol Modules Order Power Setpoint range Additial number supply W27N14 V ac/dc 10 to 100% R.H. * Mode: field adjustable W27N230 V ac * Differential: 2 to 10% R.H. * SPDT ctact 10(5)A 250 V ac * Setpoint shift: 0 to 20% R.H. Two Stage Humidistat Order Power Setpoint range Additial features number supply W27N12 24 V ac/dc 10 to 100% R.H. * Mode: field adjustable W27N V ac * Differential: 2 to 10% R.H. * 2x SPDT ctact 10(5)A 250V ac * Setpoint shift: 0 to 20% R.H. Humidity Display Modules Order Power Additial features number supply D27W1N4 24 V ac * Can be used as stand ale or in D27W2N4 230 V ac cjuncti with a humidity ctrol module * Display range: 0 to 100% R.H Y27M Signal Cverter Order Power supply Setpoint range (V) Span range (V) number Y27M4 V ac 0 to 10 0 to 10 Y27M2 230 V ac 0 to 10 0 to 10 Catalogue Secti Johns Ctrols Inc.

5 W27 5 Wiring & Adjustments One-stage Humidistat W27Nx1 Two-stage Humidistat W27Nx2 R Mode selector Setpoint Mode selector R Setpoint stage Mode selector Setpoint Setp. stage Setp Humidity/Display module D27WxN4 Signal Cverter Module Y27Mx Comm Voltage output Current output A B C M N Span adj. Reading out a humidistat DA RA A B C M N 20 ma/10v Output 4 ma/0v Reading out a sensor (stand ale) Reverse acting 20 ma/10v 20 ma/10v Output Input 4 ma/0v 4 ma/0v Setpoint adj. Input Direct acting 2001 Johns Ctrols Inc. Catalogue Secti 2

6 6 W27 Applicatis Two stage humidity ctrol with readout Three stage humidity ctrol R R R A B C S ~ ~ 0 0 St age 1 Stage 2 Stage 3 Stage 1 Stage 2 One stage humidity ctrol with read-out and analogue out-put 0 to 10V analogue output R A B C M N ~ 0 Humidificati or Dehumidificati Catalogue Secti Johns Ctrols Inc.

7 W27 7 Notes 2001 Johns Ctrols Inc. Catalogue Secti 2

8 8 W27 Specificatis General System 27 NOVA Outtput relay rating SPDT 10(5)A 250 V ac 10 A 30 V dc Operating ambient -10 to +50 C temperature Storage temperature -40 to +70 C Operating (storage) R.H. 10 to 90 % R.H. (n cdensing) Terminals screw type max. wire thickness 2,5 mm 2 Power supply 230 V ac +10% / -15% ; 50/60 Hz 24 V ac/dc +10% / -15% ; 50/60 Hz Additial specificati for display modules Power supply Resoluti Accuracy 230 V ac +10% / -15% ; 50/60 Hz 24 V ac +10% / -15% ; 50/60 Hz 1% R.H. ± 2% R.H. Signal cverter Power supply Output load 230 V ac +10% / -15% ; 50/60 Hz 24 V ac +10% / -15% ; 50/60 Hz voltage output Rmin = 1 k Ω current output Rmax = 500 Ω The performance specificatis are nominal and cform to acceptable industry standards. For applicatis at cditis beyd these specificatis, csult the local Johns Ctrols ice or representative. Johns Ctrols shall not be liable for damages resulting from misapplicati or misuse of its products. Johns Ctrols Internatial, Inc. Headquarters: Milwaukee, WI, USA European Headquarters: Westendhof 8, Essen, Germany European Factories: Lomagna (Italy), Leeuwarden (The Netherlands) and Essen (Germany) Branch Offices: Principal European Cities. This document is subject to change Catalogue Secti 2 Printed in Europe 2001 Johns Ctrols Inc.