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RICKARD THERMO-DISC VAV DIFFUSER SERIES
K
K-2 RICKARD VAV DIFFUSERS
© FANTECH
2016
DESCRIPTION
The Rickard range of Thermo-Disc VAV ceiling diffusers help to
provide an indoor environment that maintains a consistent and
comfortable temperature. Diffusers only allow the required
volume of hot or cold air to enter the conditioned space
according to the diffuser’s set point. It is mechanically
controlled and thermally powered which means it is easy to
install and requires no external wiring or power supply.
Typical Applications
Can be used for single diffuser, single room applications through
to large open areas with multiple diffusers on multi levels. Ideal
as a retrofit solution in buildings that experience specific areas
that are either too hot or too cold.
Features
O
Reduces the energy consumption of a building by lowering
the demand on the air handling system.
O
Provides the occupant with control over their specific
environment. (Temperature set point adjustable from 19
o
C
to 24
o
C.
O
Each unit contains its own in-built temperature sensing and
volume control mechanism.
O
Lightweight, easy to install and ideal as a retrofit solution.
O
Available in 495* and 595mm square overall sizes and 150
to 300mm duct neck sizes.
O
Square to square and square to round diffuser styles
available.
O
Flush to the ceiling stylish look.
O
Maintains constant air movement from 100% down to 25%.
O
Discharge pattern ensures the air within the space is
thoroughly mixed.
O
Works when system is in cooling or heating mode.
Construction
Diffusers are of sheet steel construction and finished in a chip
resistant epoxy powder coating. Matt pen white is the standard
colour but others can be ordered to suit the architectural
requirements*. All internal components of non-metallic
construction are moulded in fire retardant Makrolon glass
reinforced plastic.
Mechanism
Air volume control is achieved through the vertical up and down
movement of the control disc within the diffuser. This increases
or decreases the aperture size which allows either more or less
conditioned air to enter the space.
The position of the control disc is varied by means of a wax
filled thermal element which responds to changes in sensed
room temperature. With a rise or fall in sensed temperature the
wax extends or retracts the plunger, causing the mechanism to
move the control disc to match the air volume requirements of
the space served by the diffuser.
Testing
Methods of testing the performance of air outlets and air inlets.
ANSI/ASHRAE Standard 70-2006 (RA 2011).
SUGGESTED SPECIFICATION
The diffusers shall be of the Rickard Thermo-Disc VAV ceiling
diffuser range as supplied by Fantech Pty Ltd and be of the
model number shown on the schedule/drawings.
They shall be manufactured from sheet steel and finished in
a chip resistant epoxy powder coating. All internal components
of non-metallic construction shall be moulded in fire retardant
Makrolon glass reinforced plastic.
Air volume control shall be achieved through the vertical up
and down movement of the control disc within the diffuser.
The position of the control disc is varied by means of a wax
filled thermal element which responds to changes in sensed
room temperature. It shall require no external wiring or power
supply.
Temperature set point shall be adjustable from 19°C to 24°C via
an adjustment ring located on the diffusers thermal mechanism.
All models shall be fully tested to ANSI/ASHRAE Standard
70-2006 (RA 2011)
* Minimum 12 weeks lead time.
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