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4.7.8 Air Conditioning
‘Comfort cooling’ will normally be provided Where compressor units are wall mounted,
in the form of a split system ceiling mounted consideration should be given to the installation
cassette unit to provide both a cooling and of an external drip tray (especially where
heating facility. The equipment shall be supplied located above a pedestrian route.
by a recognized reputable manufacturer and
the HVAC contractor shall be responsible for The main electrical contractor shall run a
selecting suitable and appropriate equipment 30amp single phase supply to the position of the
for the purpose. outdoor unit, terminating in a suitable outdoor
weathered, lockable isolator.
The unit shall be sized with regards to the size
of the store and the operating conditions to be Condensate from the indoor unit shall be
found therein. run to a suitable drain position, in concealed
pipework. Refrigeration pipework and wiring
The system shall generally comprise an indoor shall be neatly clipped to the structure and fixed
cassette unit, outdoor wall/floor mounted to cable tray as appropriate. Insulation shall be
condensing unit and all inter-connecting a cellular foam product using CFC-free blowing
refrigerant pipework, insulation and associated agents, such as by Armaflex. .
power and control wiring from an isolator left by
the electrical subcontractor. Refrigeration medium shall be to current industry
standard approved specification and suitable
The indoor unit shall be controlled by a wall gas.
mounted hard wired matching controller.
As an alternative to a split cassette system, an
The face plate of a ceiling mounted indoor unit appropriately designed ducted system may be
in the Bake & Serve or Customer area must be installed if the franchisee wishes.
sprayed to RAL 7037 to match the grey ceiling
colour.
Units in other areas and Wall mounted units
should however always be left in standard white.
The outdoor condensing unit will be wall or floor
mounted, as shown on the project drawings,
at a position to give access for maintenance.
Safe access is required to compressor units
located on roofs in the form of appropriate
edge protection, task lighting and non slip floor
finishes.
4.7.8 Air Conditioning 30 May 2018