Defensor Mk5 Technical Documentation

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3.5 Functional description The Defensor Mk5 steam humidifier is an unpressurized steam generator for direct (with fan unit) and indirect (with steam distribution pipe) room air humidification in ventilating and air-conditioning systems. In conjunction with a steam distribution pipe “Process” the unit may be used for humidification in laboratory and process applications. The Defensor Mk5 operates on the resistance heating principle and is therefore suitable for operation with raw water, fully demineralized water and partially softened water. Water supply The water is taken via a filter valve (accessory “Z261”) to the steam humidifier. It reaches the steam cylinder via the inlet valve (level controlled) and the open water cup. Level regulation The water level in the steam cylinder is continuously monitored with the level unit. If the water level reaches a preset level (owing to the evaporation process) the level unit supplies a signal to the controller. This opens the inlet valve and the steam cylinder is filled up. When the preset operating level is reached, the level unit supplies another signal to the controller to close the inlet valve. The pressure equalizing pipe between the steam connection and the level unit ensures that the water levels are the same in the steam cylinder and the level unit. Steam generation regulation The steam is produced in the steam cylinder by several resistance heating elements. An external or the internal regulator for connection as required control the steam production fully variably from 0 to 100 %. Flushing The evaporation process increases the concentration of minerals in the water of the steam cylinder. A suitable volume of water must be flushed through the steam cylinder from time to time and replaced by fresh water to ensure that this concentration does not exceed a specific value unsuitable for operation. The Mk5 steam humidifier performs an auto-adaptive flushing. This consists of the following two forms of flushing: – Automatic flushing takes place as soon as the water in the steam cylinder exceeds the upper operating level (e.g. by foaming of the water). – Flushing dependent on time performs the flushing process at preselected time intervals (see section 6.1 “Adjustments”). Automatic or time-dependent flushing takes place depending on the water quality and the operating data. If the lowest operating level is reached during the flushing process, the inlet valve remains open until the water level in the steam cylinder has reached the normal working level again. If the lowest operating level is not reached, the inlet valve is closed. Lime collector tank The minerals precipitated by the evaporation process accumulate at the bottom of the steam cylinder. Units designed for operation with untreated water are equipped with an additional lime collector tank located directly underneath the steam cylinder. This way the minerals do not accumulate in the steam cylinder but mainly in the collector tank thus extending the service intervals and reducing the maintenance costs. Units designed for operation with fully demineralized water do not have a lime collector tank as fully demineralized water contains only small amounts of minerals. 9
4 Basic planning 10 All the data necessary for the selection and layout of a Defensor Mk5 humidifier system are provided in the following chapters. The following planning steps are required: • Selecting the unit (see chapter 4.1) • Selecting the control system (see chapter 4.2) • Selecting options (see chapter 4.3) • Selecting accessories (see chapter 4.4) 4.1 Selecting the unit The selection of the unit is reflected in the type description: 1. Application 2. Supply water quality 3. Required maximum steam capacity 4. Required heating voltage 1. Application The type series can be selected on the basis of the following table: Scope of use Type series For direct or indirect room air humidification with standard requirements for control precision. For direct or indirect room air humidification in laboratory and process applications where there are increased requirements for control precision. Visual Process Achievable control precision – Visual: ±5 %rh (assuming optimum control distance, PI-control and use of untreated water) ±2 %rh (assuming optimum control distance, PI-control and use of fully demineralized water) – Process: ±2 %rh (assuming optimum control distance, PI-control and use of untreated water) ±1 %rh (assuming optimum control distance, PI-control and use of fully demineralized water) 2. Supply water quality Description unit with a lime collector tank for operation with untreated water and partially softened water. Unit without a lime collector tank for operation with fully demineralized water with a conductivity value
Page 1 and 2: 1115661 EN neutral 0407 Steam humid
Page 4 and 5: Contents 1 Introduction 4 1.1 To th
Page 6 and 7: 2 For your safety Intended use Stea
Page 8 and 9: The type designation is structured
Page 12 and 13: 3. Calculating the maximum required
Page 14 and 15: 4.2 Selecting the control system Th
Page 16 and 17: 4.3 Options The following table pre
Page 18 and 19: 4.4.2 Accessory details Steam distr
Page 20 and 21: 4.5 Additional planning instruction
Page 22 and 23: Minimum distances to observe min. 6
Page 24 and 25: 5.3 Steam installation 5.3.1 Positi
Page 26 and 27: 3/7 2/7 2/7 2/5 1/5 1/5 1/5 2/6 1/6
Page 28 and 29: 5.3.3 Installing the steam hose Imp
Page 30 and 31: - Steam distribution pipe is mounte
Page 32 and 33: Water supply The water feed pipe (m
Page 34 and 35: 5.5 Electric installation Up Uc 1 2
Page 36 and 37: Legend to wiring diagram A1 Control
Page 38 and 39: Control voltage supply Uc Caution!
Page 40 and 41: 5.5.4 Inspecting the electrical ins
Page 42 and 43: Setting the maintenance interval (
Page 44 and 45: Remote operating and fault indicati
Page 46 and 47: Description of the operating parame
Page 48 and 49: inlet valve cor. 100 serial interfa
Page 50 and 51: Call-up of the setting level Mk5 Vi
Page 52 and 53: Integr.time[min] 010 softstart off
Page 54 and 55: 6.6 Maintenance 6.6.1 Notes on main
Page 56 and 57: Removal and dismantling of the stea
Page 58 and 59: 6.6.3 Notes on cleaning Cleaning th
Page 60 and 61:
6.7.2 What, if..? Most operational
Page 62 and 63:
6.7.3 Replacing unit fuses Warning
Page 64 and 65:
© Axair Ltd. 2000, Printed in Swit
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Defensor Mk5 Technical Documentation

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