Brivis CC315IN, Руководство по установке

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7
3.0 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, airtight and have a minimum insulation rating of R1.O (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
•
It should be correctly sized with the curves and bends smooth enough to ensure the air flows through
efficiently and quietly 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 and minimum resistance
•
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
If a filter is fitted to the return air grille, it should be easily accessible for regular cleaning.
The chart below gives the minimum recommended return air grille sizes for each model heater.
Table 2: Minimum Recommended Return Air Grille Selection Chart
Model
Without Filter With Filter
Grille Size
(mm²)
Example of Size
(mm)
Grille Size
(mm²)
Example of Size
(mm)
CC315
0.21
(370x560)
0.30
(400x750)
CC320
0.21
(370x560)
0.30
(400x750)
CC320XA
0.24
(530x530)
0.35
(400x1000)
CC325
0.23
(530x530)
0.33
(350x900)
CC325XA
0.26
(530x530)
0.38
(400x1000)
CC330
0.35
(400x1000)
0.51
(400x1350)
CC330XA
0.38
(400x1000)
0.54
(400x1350)
For example a grille with a free ventilation opening measuring 370mm x 560mm, the grille size is 0.37m x 0.56m =
0.21m
2
. This grille would be suitable for a CC315 & CC320 heater provided the grille does not have a filter fitted.
Note: The ducting should be well insulated and it is mandatory under building codes to install insulated fire rated
duct.
Note: Grille sizes are based on maximum airflow with typical Egg-Crate Grille type. For all other types, consult grille
manufacturer's specifications.