Requirements On Installation Of The Water Manifold; Selection Of Fcu; Fcu Type Selection; Matching Of Capacity - Sinclair S therm Series Service Manual

(5) Distance between the unit and the water manifold should be within 15m. If the distance exceeds 20m, then
it is required to calculate the hydraulic power.

3.2 Requirements on Installation of the Water Manifold

(1) The water manifold should be installed on the wall or inside the special box. For housing constructions, it is
generally installed in the kitchen.
(2) The valve for the water manifold should be installed horizontally and keep a distance of at least 300mm to
the ground.
(3) The water supply valve should be installed upstream of the water manifold and the return valve should be
installed downstream of the water manifold.
(4) A filter is required upstream of the water manifild.

4 Selection of FCU

4.1 FCU Type Selection

The air-water fan coil unit is optional for S therm units.

4.2 Matching of Capacity

Load of the FCU is recommended to be between 70%~120% of the S therm unit.
Notes
(a) When load of the FCU is too small, the unit would start/stop frequently, which is adverse for oil return.
(b) When load of the FCU is too large, the unit would always run under high frequency, which may bring about
energy waste.
Less than 15m is better
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