8.1 Wiring a Damper Motor to the Heater’s Control Module
Diagram 18.
a) 24 Vac Power Open / Power Close
b) 24 Vac Power Open / Spring Return
Damper Motor
Damper Motor
B
c) 240 Vac Power Open / Power Close
Damper Motor
9. Ducting Information
Good duct design and sizing are essential to every Brivis Central Heating system. Use the Brivis “SuperSizeGuide”
and technical data within this manual for the best results and follow these guidelines:
• Ductwork should be well insulated and airtight and have a minimum insulation rating of R1.0 (R1.5 in some
areas). Ensure that ducting complies with the Building Code of Australia.
• The ducting should be well fastened to pops, BTO’s, outlet boots and neck adapters adequately with duct
tape, in accordance with AS 4254 and HB 276.
• It should also be properly sized, and curves and bends should be smooth enough to ensure that the air flows
through efficiently, quietly and with minimal resistance.
• The registers and diffusers should be large enough and of good design. They should minimise noise, while
providing the correct distribution pattern.
• The positive return air system should be fitted with a grille large enough to accept the full air capacity of the
system at low noise levels.
• If the system uses high level outlets (e.g. ceiling diffusers), then the return air inlet should be at a low level.
Ceiling systems with a high level return air may result in reduced performance.
• For SP4, SP5 & SP6 heaters, access to the ductwork must be provided for general maintenance and
service to the supply air thermistor sensor.
Note:
It is important that the ducting should be well insulated. It is mandatory under building codes to install
insulated, fire rated duct.
If a filter is fitted to the return air grille, it should be easily accessible for regular cleaning.
Table 2
gives the minimum recommended return air grille sizes for each model heater.
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