Quantity And Location Of The Water Manifold; Design Requirements On Loop Quantity For Circulation Water - Sinclair S therm Series Service Manual

Length of coils is calculated as below:
Square-shaped coil: =L*W/tube spacing=area/tube spacing
U-shaped coil: =L-1+L*W/tube spacing=L-1+area/tube spacing
The reason why the square-shaped coils are recommended is because they can keep even temperature
distribution. Special demand can be met by adjusting the tube spacing.
Distance from the room to the water manifold should be estimated according to the actual conditions of the
project and generally should not exceed 30m.
2.3.2 Selection of Loop Quantity for Each Room
Length of a single loop should not exceed 100m. If so, it should be divided into multiple loops.
Area of a single loop=tube length×tube spacing=100m×150mm=15m
Length of underfloor coils is recommended to be within 100m and length of each branch should be kept the
same to the most extent.

3 Quantity and Location of the Water Manifold

The water manifold is a kind of device for distributing water for the water supply and return tubes.

3.1 Design Requirements on Loop Quantity for Circulation Water

(1) One water manifold is allowed for at most 8 loops. When quantity of loops exceeds 12, then two water
manifolds should be used, or it will cause uneven water distribution.
(2) The maximum flow rate of the water manifold should be less than 0.8m/s.
(3) The inlet and outlet of each loop should be connected to the water manifold and the inner diameter of the
water manifold should be or larger than that of the main water supply/return tube.
Square-shaped Coil (Recommended) U-shaped Coil
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