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Summary of Contents for Zehnder Rittling ComfoAir 185 WM
- Page 1 ComfoAir 185 WM Mechanical Ventilation with Heat Recovery Installation Instructions CA185WM-GB...
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Page 2: Table Of Contents
ontents Page General Description / Physical Specification ......3 - 4 Installation Instructions .............. 4 General Preparation ..............4 Configuration ................. 5 Mounting ..................6 Access for Maintenance ............... 7 Condensate Drain ................. 7 Ducting Guidelines ............... 8 Electrical ..................9 Wiring the Unit ................ -
Page 3: General Description / Physical Specification
Overview 1.1.1 The ComfoAir 185 WM is a ventilation system designed to provide improved indoor air quality in dwellings. As a whole house system, the unit continuously extracts air from the non-habitable rooms and supplies fresh, filtered air to habitable rooms. Heat that is recovered from the air drawn from the bathrooms and kitchen is passed through a heat exchanger and the heat that is recovered is transferred, to temper the supply air in habitable rooms to provide a comfortable indoor environment. -
Page 4: Installation Instructions
Installation Instructions General Preparation 2.1.1 The ComfoAir 185 WM unit is supplied with 4 x 150mm Ø spigots. • 150mm ducting with connectors can be used (see Ancillary Section page 3) to provide performance levels required for compliance with local Building Regulations. -
Page 5: Configuration
Positioning 2.2.1 The ComfoAir 185 WM unit must be installed vertically and can be either wall or floor mounted to enable effective condensate drainage in either a kitchen/service cupboard or secured to a vertical structure in the loft space. If located within a cold space, it is recommended that the bottom of the unit is insulated to prevent freezing around the condensate connection. -
Page 6: Mounting
Mounting 2.4.1 The ComfoAir 185 WM unit is supplied with one wall fixing bracket. The bracket is a long strip and has two adjustable fixing points located at the end of the bracket. Screws and fixings not supplied. 2.4.2 Proceed to align the wall bracket taking into account the available wall space to mount the unit, ensuring that the wall can support 30kg. -
Page 7: Access For Maintenance
2.6.1 It is important that any condensate MUST be drained away. • The ComfoAir 185 WM unit is provided with a condensate drain located at the base of the unit underneath (See Figures 1-3). The drain plug allows a condensate drain hose (21.5mm diameter) to be push connected and solvent welded/sealed. -
Page 8: Ducting Guidelines
Ducting must be connected to all four spigots according to right or left hand configuration (See Section 2.3 for Configuration). It is recommended that a minimum distance of 200mm is maintained between the ComfoAir 185 WM and any ducting bends. 2.7.3 To prevent condensation, ensure that the intake and exhaust ductwork from the unit is insulated. -
Page 9: Electrical
2.7.8 The intake fresh air should be directly from the outside. • If drawn through a wall, an external grille should be fitted. • If drawn through a roof, a recognised roof terminal should be fitted. • Ensure that the free area opening of the grille/terminal is a minimum of 90% of the free area of the ducting being used. -
Page 10: Wiring The Unit
Wiring Diagrams Key: Earth Green / Yellow Neutral Blue Brown Permanent Live Black AUX speed Grey High speed 2.9.1 Two speed control via a light switch 2.9.2 Two speed control via ZGS2 switch 2.9.3 Three speed control via ZGS1 switch 2.9.4 Three speed control via a light switch for trickle &... -
Page 11: Connecting To The Bms
System (BMS) 2.9.6 To wire into to the BMS connector within the ComfoAir 185 WM, first remove the electrical wiring cover as per Fig. 4 below then locate the BMS connector on the PCB (maintain a minimum separation distance of 35mm between the mains power and controller cables). - Page 12 Figure 7 - BMS Wiring Diagram Figure 6 - ZGRC1 Controller Note: Only one ZGRC1 boost and status controller can be installed with the ComfoAir 185 WM. Additional boost actuation should be via either 'switch-live' or standard hardwired 2-position switches. A separate AUX switch...
- Page 13 2.9.8 When wiring has been completed apply cable clamp and retain the cable sheath securely in place by tightening the cable clamp down with screw fixings. Pre-wired 1 2 3 4 5 supply cord not shown Figure 8 - Securing BMS Wiring (Cable not supplied) 2.9.9 Refit electrical cover, taking care gasket seal underneath is seated correctly and cable is not trapped.
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Page 14: On-Site Commissioning
On-Site Commissioning 3.1.1 This section covers set-up, configuration of the unit for installation and altering pre-set factory settings. For instructions on how to operate the LCD display user menu, maintenance options and indicator warning information, please refer to the User / Homeowner Guide. 3.1.2 Once the wiring connections have been checked, switch the mains supply on and check that the system is operating correctly. - Page 15 3.1.4 Commissioning Wizard To progress through the commissioning wizard, rotate the controls central button to required configuration and press the button to select (at each section the text will flash until it has been selected, whereby it will then go solid).
- Page 16 3.1.5 Wizard Menu Structure Installer Settings Port Configuration Rotate button to choose either RH (Right Hand) or LH (Left Hand) Configuration Extract High Factory airflow set at 66%, rotate button to required airflow % Supply High Factory airflow set at 66%, rotate button to required airflow % Extract Low Factory airflow set at 33%, rotate button to required airflow % Supply Low...
- Page 17 Refer to performance graph for ComfoAir 185 WM airflow characteristics (See Section 3.1.8). Note: All settings are stored within the ComfoAir 185 WM unit’s memory and should NOT be lost in the event of a power failure. When power is restored, the unit should revert to normal running with all settings unchanged.
- Page 18 3.1.10 Recommissioning Menu Structure Recommissioning User Menu See Homeowner Guide Service Menu See Homeowner Guide Setup Menu Password Input password 1010 to proceed into Setup Menu screens Port Configuration Rotate button to choose either RH (Right Hand) or LH (Left Hand) Configuration Extract High Wizard airflow setting will be shown .
- Page 19 3.1.11 To Modify Summer ByPass Activation Temperature When the internal and external temperature conditions are met the unit will try to maintain an indoor comfort temperature by operating the summer bypass valve. This can be adjusted as follows: • Press the control button to activate the unit. <...
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Page 20: Guarantee
The Guarantee Period This Zehnder ComfoAir 185 WM has a 2 Year Guarantee as standard with the option to extend to a 6 Year, subject to registration. Terms and conditions apply. 4.1.1 This does not affect your statutory rights. 4.1.2 Full details available at www.zehnder.co.uk.
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