23Modul-AIR Exhaust Air Heat Pump Installation Guide
• Underfloor heating pipe centres to be equal to or less than 150mm.
• Radiators are to be sized according to standardized design methods. Eg. SR.50 or MCS.
• If Green Comfort unit is used a mechanical by-pass valve is to be installed on flow from the Modul-AIR
unit to the Green Comfort unit
• The hot water control is managed through the touchscreen controller. Heating is prioritized over hot
water production.
• Use of time clocks to turn off underfloor heating circuits is not recommended.
• Air is the most prevalent cause of restricted flow in the system. Make sure that all pipework can easily
be purged of air and that all air is removed from the system prior to starting the unit.
• Site visits to solve a flow rate issue due to the presence of air are not covered under EUW and as such
will incur a call-out charge.
• Air must be purged from the system using a suitable fill & flush pump via the fill & flush valve.
• The Heat Pump duct connections are Ø150mm. Flat Pack, Round or Semi Rigid duct is acceptable
however, the cross sectional area must not be reduced and it must be maintained or increased to avoid
noise in the duct system.
Tank Immersions connected to the Modul-AIR
System must have a power input of 2kW or less
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