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3.10.3 Pressure drop table - coil
Product info:
Coil sur-
Product
face m²
SBB 300 Trend
3.1
3.11 Commissioning
1.
Check all connections for tightness.
2.
Open a hot water tap furthest away from the
cylinder. Open the mains stop cock to fill the
water heater. When water flows evenly from
tap, allow to run for a few minutes to flush
through any dirt, swarf or residue, then close
the tap. Open successive hot taps to purge
any remaining air.
3.
Check all water connections for leaks and
rectify if necessary
4.
Manually operate Expansion relief valve
6 (see page 8) to ensure free water flow
through discharge pipe by turning knob
counter-clockwise. To close continue to turn
counter-clockwise until the valve shuts.
5.
Manually operate Temperature and Pres-
sure Relief Valve 7 (see page 8) to ensure
free water flow through discharge pipe (Turn
knob counter-clockwise).
6.
Switch electrical power on.
3.12 Draining
Switch off the electrical power (Important to avoid
damage to element).
Isolate boiler from cylinder. Turn off the cold wa-
ter supply valve. Open hot water tap. Open drain
valve (see page 8) at base of cylinder.The unit
will drain.
Draining process may be speeded up by open-
ing the temperature and pressure relief valve. An
internal ø18 mm hose can be applied to lead the
water to a gully, sink or similar.
3.13 System flushing
This
will
not
be
mal circumstances as the line strainer will
prevent ingress of foreign materials, however
if flushing is required, run at least 50 litres of
water from the cylinder at the highest possible
flow rate. Close the taps and follow draining
procedure (above).
Pressure drop (mbar) at volume flow:
540 L/h
900 L/h
1800 L/h
(0,15L/s)
(0,25 L/s)
(0,50 L/s)
51
117
necessary
under
2700 L/h
3600 L/h
(0,75 L/s)
(1,00L/s)
440
890
1555
nor-
Cw value (m³/h):
4500 L/h
5400 L/h
(1,25 L/s)
(1,50 L/s)
pressure drop
2330
3340
Flow @ 1bar
2.9
11
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