Advertisement
Installation Manual
2.2 Condensate Drain Installation
Unit comes complete with external condensate drain pipe of 15 mm
diameter positioned 20 mm up from the base and 80mm back from the
supply/exhaust connection face.
Use conventional plumbing connections to link up with U-trap. If using
a U-trap please ensure the U-trap has been filled to a suitable level of
water to avoid any air locks.
If the condensation pipe is fitted in an unheated space the pipe should
be in insulated to prevent freezing.
For domestic waste pipes, the typical 1:40 (around 1.5°) is
recommended. If using a dry trap various suppliers quote a minimum
of 10° for a pipe run in line with the unit. Ensure the cooler has its own
trap separate to the MVHR.
3.0 DUCTING
Before commencing ducting installation reference should be made
to building regulations document "Domestic ventilation compliance
guide". This document supports ADF2010 and details installation,
testing and commissioning of all ventilation systems.
It is recommended that rigid ducting must be used it all times. Fresh-air
Intake and stale air Exhaust ducts will carry cold air in winter. Supply
air duct will carry cold air when Cooling Module is operating. Therefore
Intake, Exhaust and supply ducts will be at risk of condensation forming
on external surfaces and should all be insulated. Supply air duct only
needs insulating after the cooling module.
Any duct component including ancillaries such as carbon filters must
be insulated if they are carrying colder air produced by the cooling
module. Flexible connections should be avoided. Nuaire Ductmaster
thermal ducting should be used on Intake, Exhaust and Supply duct
runs.
Ducting must be installed in such a way that resistance to airflow is
minimised. Bends should be kept to a minimum.
A minimum distance of 300mm between the appliance and any bends
in ductwork is recommended. 220 x 90mm rectangular ducting should
be used.
Ducting joints must be sealed with silicone type sealant and needs
to be taped. Ducting shall be adequately and reliably fixed to the
appliance with screws to prevent access to live parts.
3
Typical Ducting Arrangement
EXTRACT
FROM
DWELLING
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
4.0 SUPPLY TEMPERATURES
Supply air temperature is critical to ensure good cooling distribution
and to avoid condensation forming on supply terminals. MVHR
duty in cooling mode must be sufficient to avoid "Over-cooling". If
supplying to habitable rooms through Linear Slot Diffusers 12⁰C is the
recommended minimum supply air temperature. If supply to habitable
rooms is by air valve then 14⁰C is the recommended minimum supply
air temperature.
5.0 CONTROLS / DESCRIPTION OF OPERATION
MVHR will run continuously at Background/Whole dwelling duty
•
(Speed 1) unless it receives a 230v signal to Switched-Live input
connections SL1 or SL2.
MVHR will be enabled to minimum-high-rate/Boost (Speed 2)
•
when it receives a 230v switched live from Kitchen boost switch /
Bathroom lighting circuit / PIR Detector / Remote humidistat, etc.
Cooling module will be enabled to run and MVHR enabled to
•
speed 3 by a 230v Switched live from wall mounted thermostat
(Supplied by Nuaire). The Wall mounted thermostat will enable
the cooling module to run and MVHR to speed 3 when the living
room temperature reaches 23°C (when the CM-THERM-CONTROL
is set to ECO).
N.B. The wall mounted thermostat is factory pre-set to enable the
•
Cooling module to run and the MVHR to speed 3 at 23⁰C. It may
be necessary to interlock this with the heating system to prevent
the cooling system from running when the heating is ON.
If supplied with a Summer/Winter MVHR, it will be supplied with
•
a Summer/Winter switch. When set to summer mode the MVHR
will target a temperature under 21⁰C within the apartment.
Summer mode can be selected year round to attempt to mitigate
•
overheating caused by solar gains but must be selected when
cooling is expected to run (summer months).
Winter mode ensures the MVHR will recover heat at all times.
•
SUPPLY
WITH
COOLING
INTAKE
FROM
OUTSIDE
•
CM-XBOX-INLINE
EXHAUST
WITH HEAT
REJECTION
31. 08. 22. Document Number 671925
3
Advertisement
