Zehnder Rittling Centair CMEV.4e Installation Instructions Manual
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Zehnder Rittling Centair CMEV.4e Installation Instructions Manual

Mechanical extract ventilation (mev) system
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Centair
CMEV.4e / CMEV.4eHT
Mechanical Extract Ventilation (MEV) System
Installation Instructions
Commissioning Data:
To be completed by the Commissioning Engineer.
Refer to User/Homeowner Guide also supplied.

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Summary of Contents for Zehnder Rittling Centair CMEV.4e

  • Page 1 Centair CMEV.4e / CMEV.4eHT Mechanical Extract Ventilation (MEV) System Installation Instructions Commissioning Data: To be completed by the Commissioning Engineer. Refer to User/Homeowner Guide also supplied.
  • Page 2 Page General Description / Physical Specification Installation Instructions General Preparation Positioning / pplication Mounting Ducting Guidelines Electrical On Site Commissioning Declaration of Performance (DOP) Guarantee General Description / Physical Specification Overview 1.1.1 The CMEV.4e range is a ventilation system designed to provide improved indoor air quality in dwellings. s a whole house system, the unit constantly extracts air from rooms generating moisture and odours in dwellings (Kitchens, Wet Rooms, Utility Rooms and WC’s).

  • Page 3: Installation Instructions

    1.1.11 If the supply cord is damaged, it must be replaced by a special cord / assembly available from the manufacturer or its service agent. The replacement must be carried out by a qualified electrician in accordance with IEE or local regulations. 1.1.12 Observe appropriate safety precautions if working on steps or ladders.
  • Page 4 2.2.3 Figure 1 - Optional Fifth Spigot Carefully cut out spigot cap Discard waste material Connect ductwork as with a bladed tool responsibly appropriate 2.2.4 Figure 2 - Mounting Orientations Ceiling Mounted in cupboard Wall Mounted Loft Mounted on platform Mounting 2.3.1 Determine the duct inlet and exhaust configuration and the best orientation for the unit for this installation, also...

  • Page 5: Ducting Guidelines

    Ducting Guidelines 2.4.1 Please refer to design drawings for proposed ducting layout. 2.4.2 5 x 125mm nominal diameter spigots are provided for connection to ducting. Ductwork should be securely connected to spigots. Failure to do this will cause unnecessary air leakage and impair performance. 2.4.3 If applicable, Fire dampers MUST BE FITTED in accordance with Part B of the Building Regulations.

  • Page 6: Wiring Diagrams

    Wiring Diagrams 2.6.1 Two speed control via light switch (CMEV.4e / CMEV.4eHT) 2.6.2 Two speed control via GS2 switch (CMEV.4eHT only) 2.6.3 Three speed control via light switch for trickle & boost speeds and medium speed activation via remote sensor (CMEV.4e only) 2.6.4 Three speed control via GS2 switch for trickle &...
  • Page 7 BMS Connectivity – CMEV.4eHT Only 2.7.1 The CMEV.4eHT unit can be connected to a BMS system that can provide a variable 0-10 Volt output that will be used to control the fan operating speed, as shown within table 1.1 below: Voltage Speed Control 0V –...
  • Page 8 2.7.4 Wiring of the BMS to the CMEV.4eHT (See Figure 6) Remove the three screws connecting the lid. Carefully remove the lid to expose the PCB. Carefully pierce through the ‘closed’ top hole within the lids cable grommet and pass through the BMS cable (not provided).

  • Page 9: On Site Commissioning

    2.7.6 Fan Motor ssembly Replacement (See Figure 7) Realign the fan motor assembly ‘LINE INDIC TOR’ with the ‘UNLOCKED’ symbol on main fan housing. Ensure fan motor assembly has a positive fit, and push firmly into main fan housing. Rotate fan motor assembly until it stops.
  • Page 10 2.8.3 Valve Set-up • Switch the unit to the highest operating position. • Close external windows and doors. • With the system operating in boost mode, proceed to open the valves to their maximum. • Measure the total air volume at the valves. •...

  • Page 11: Performance Graphs

    Performance Graphs 2.9.1 irflow Characteristics for CMEV.4e / CMEV.4eHT Models Declaration of Performance Residential Ventilation Unit Greenwood Centair CMEV.4e / HT Greenwood Airvac Greenwood Airvac Supplier Name or Trade Mark Central Demand Control Local Demand Control Supplier Model Identifier and Options Installed...
  • Page 12 4.1.1 This Greenwood product (CMEV.4e / CMEV.4eHT) has a 2 Year Guarantee. 4.1.2 This does not affect your statutory rights. 4.1.3 Full details available on request from +44 (0) 1276 408404 or www.greenwood.co.uk / info@greenwood.co.uk ll information is believed correct at time of going to press. E&OE. ll goods are sold according to Zehnder Group UK Ltd’s Standard Conditions of Sale which are available on request.

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Centair cmev.4eht

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