Nu-Air WINDSOR SERIES Operating And Installation Instruction

Also see for WINDSOR SERIES: OPERATING, MAINTAINING & INSTALLING

Nu-Air WINDSOR SERIES Operating And Installation Instruction Manual pdf 15 page image

Nu-Air Ventilation Systems Inc. - HRV Operating & Installation ManualRev. 2.3 Aug. 19, 2014 - 14 -4.1. Main Board FeaturesThe following sections outline some of these features and explain the board in greater detail. A qualifiedtechnician must do any service work done within the electrical panel of the HRV.Powerful TransformerA virtually unlimited number of ES Series controls can be connected in either series or parallel. Up tosix (6) WIN-20 Timers can be connected in parallel.Circuit ProtectionField mis-wiring of 24 V controls, may cause the board fuse to trip. If this happens, remove the controlwires and allow fuse to reset (may take a few minutes). Check manual for proper wiring connections.220 V/50 Hz compatibilityFactory adjusted jumper setting for 220V/50Hz geographic areas.Variable Low- and High-Speed Motor ControlAs discussed and illustrated in Section 3, speed adjustment of each motor in both low and high speed ispossible using the FRESH and EXHAUST air pushbutton switches, located on the side of the unit.12-Volt and 24-Volt Control OptionsBecause the unit comes complete with a 24 V (up to 10 wires) terminal block and an additional 12 V (4-wire) receptacle, thus your unit can be operated by a variety of control means and strategies.Intelligent Defrost CyclesYour unit will adjust defrost frequency and duration, based on outdoor temperature: -5º C (23º F) -15º C(5º F), -20º C (-4º F) and -27º C (-17º F).5th Port, Recirculation and Defrost.A temperature sensor is located in the fresh air stream before the core. When the outdoor air temperatureis measured at -5º C (23º F), a timed defrost cycle is initiated. For example, at -15º C (5º F) NU145 willrun normally for approximately 37 minutes and then shut off the exhaust air fan for 6 minutes,meanwhile closing a damper to incoming outside air. Closure of the damper allows the unit to then drawair from a neutral space through its (top) 5th port and circulate this warm indoor air (not from exhaustedareas) through the heat recovery core to defrost it. Timed cycles repeat until the temperature rises above- 5º C (23º F). Defrost has priority over all functions, i.e. commands from all remote controls willstart/resume after a defrost cycle.Neutral Pressure Defrost, Clean RecirculationIn defrost and cycle modes, ES Series H/ERVs do not induce indoor negative pressure nor do theyrecycle exhaust air; rather, they redistribute ambient room air. This feature makes your ES Series HRVideal for drawing air from super-heated areas, e.g. where a fireplace or woodstove operates, anddistributing this heat to other areas of the home. Consult Section 4.2 for ES recirculation controls.Backdraft ProtectionWhen the machine is set to Standby, the damper automatically closes off the fresh air port to preventthe potential of unwanted drafts while the machine is not in operation.