Sinclair S therm Series Service Manual page 122

Installation of the Water Tank Safety Valve
Pressure of the water tank will gradually increase during heating and a safety valve is required to discharge
some water for pressure relief. If not or installed incorrectly, it would make the water tank to expand, to be
deformed, to be damaged or even lead to personal injury. The arrow → of the water tank safety valve shall point
toward the water tank. No cut-off valve or check valve is required between the safety valve and the water tank, as
the safety valve would fail to work. The safety valve requires the drain hose for installation and should be securely
fastened. The drain hose should be led naturally downward into the floor drain without any convex bow, intertwist
or fold. Extra length of the drain hose inside the floor drain should be cut away in case of poor drainage or water
freeze under low atmospheric temperature.The recommended action pressure for the safety valve is 0.7Mpa, the
same as that for the water tank. Do comply with this requirement for section of the safety valve; otherwise the
water tank would fail to work normally.
Installation Mode 1 of the Tap Water Safety Valve (Inlet Water Pressure =0.1~0.5MPa)
Installation Mode 2 of the Tap Water Valve (Inlet Water Pressure<0.1MPa)
The safety valve is bypass installed in the installation mode 2. A check valve is required at the tap water pipe
and installed horizontally with the valve cap vertically upwards and the arrow direction at the valve body the same
as the water flow.
Installation Mode 3 of the Tap Water Safety Valve (Inlet Water Pressure>0.5MPa)
A pressure maintaining valve is required in the installation mode 3 to make sure the water tank pressure keep
within 0.3~0.5MPa. The arrow direction of the pressure maintaining valve should be the same as the water flow.
Note: the filter, safety valve, check valve, pressure maintaining valve and hose for installation are not delivered
with the main unit and should be prepared by the user.
Thermostat of the Water Tank E-heater
Distance between the probe of the thermostat and heating pipe of the water tank E-heater is 1cm, far smaller
than the distance between it and the coils. As the highest allowable temperature of the coils is lower than protective
set point of the thermostat, the coils will trigger no action of the thermostat.
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