h e a t i n g s y s t e m s
Primary circuit outlet with
draining valve
Draw-off tap
Isolating valve
Isolating valve (DHW outlet)
DHW draining valve
Fig. 9. SILOX S Tank Draining - Typical Connection Diagram
From distribution
network
17
I10_092-01 • SILOX S_EN
M
aintenance
Draining the Tank
Always de-pressurise and/or empty the outer (primary) tank before de-pressurising and
emptying the inner tank (DHW). Failure to comply may damage the inner tank.
Condition(s):
Allow water in the appliance to cool down before
draining.
Water flowing out of the drain valve
can be extremely hot. Use extreme
care when draining a hot appliance.
Draining procedure:
Always drain/depressurize the outer tank
before draining the inner tank, to prevent
any deformation of the inner tank due to
pressure of the primary circuit.
Primary tank:
1.
Isolate the supply circuit.
2.
Open the air vent located at the top of tank.
3.
Connect draining valve to the drain.
4.
Open draining valve located at the primary
circuit outlet.
DHW Tank:
1.
Close the filling connection to the water dis-
tribution network.
2.
Close the isolating valve of the DHW outlet.
3.
Open a hot water draw-off tap in the system.
4.
Connect the DHW draining valve to the drain.
5.
Open the isolating valve of the drain connection.
Follow-on Task(s):
î
Close all valves and tap, as required
