11
RECOMMENDATION
-
Allow clearance to the floor. Screw the feet out a minimum of 15 mm from the bottom of the prod
-
uct.
-
Mains cable for wall socket (1) should be hidden under one of the channels in the bottom of the
product.
-
If the non-return valve is tight, a reduction valve and expansion vessel should be fitted (to
stop dripping from the safety valve).
-
If the maximum water pressure exceeds 6 bar in a 24-hour period, a reduction valve and expansion
vessel should be fitted.
-
For installation in a rooms which does not conform to the wetroom standard, a watertight
drip tray with overflow pipe
>
18 mm. inside diameter should be fitted under the product, in
addition to an automatic stop cock with sensor. This will prevent possible material damage.
3.10.2 Fitting recommendation
1
3.11 Commissioning
1. Check all connections for tightness.
2. Open hot water tap furthest away from the
OSO water heater. 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 succes-
sive 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 OSO unit. Turn off the cold wa
-
ter supply valve. Open hot water tap. Open drain
14 (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 necessary under nor-
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).
Summary of Contents for Delta Twincoil DTC 200
Page 26: ...26 NOTES ...
