78 Products that perform | Service that delivers | People that care Merley sequence controller Boiler sequence controller for up to 15 modules in cascade or unison mode. A common control platform that can be used with the Wessex ModuMax mk3, Stratton mk2, Varmax, Upton and Purewell Variheat mk2 condensing boilers. Key benefits: Energy saving functionality Reduces carbon emissions by accurately matching load Lead boiler rotation and load sharing Intelligent self-learning control Versatile control strategies Heating zone and DHW management Options: Loose kit controller External air sensor Choice of room sensors Hard wired controls Domestic hot water sensor Strap on flow temperature sensor Controls up to 15 Modules Note: All dimensions in mm unless otherwise stated. 144 96 90 27 17 43 (144) 138 (96) 92 0.5...3.0 Display unit Fascia panel cut-out for mounting display unit 70 281 Front view Side view 4x Mounting holes 4.5mm dia 121 B O I L E R S E Q U E N C E C O N T R O L L E R 400 150 300 Electrical cable gland plate located on underside of control panel (6 x loose 20mm glands supplied) 10mm Dia. mounting hole locations Display unit dimensions Wall mounted dimensions Loose kit dimensions Dimensions ADDITIONAL PRODUCTS
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