Opella Delchem Dualflush siphon User manual

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Dualflush operation
How the dualflush operation for this siphon works:
The full flush volume is achieved by flushing the WC in the normal fashion of fully
depressing the lever and immediately releasing once the flush has started.
The short flush volume is achieved by fully depressing the handle in the normal fashion and
holding the handle in the down position until the flushing cycle has finished.
Dualflush Label
High Level Cisterns: To appear on or near the lower
edge of the front of the cistern shell.
Low Level and Close Coupled Cisterns: To appear on
the upper half of the front of the cistern shell.
Internal Overflow
If in the unlikely event that your filling valve fails open, all Opella siphons feature an
internal overflow which will be able to cope with upto 35l/min of excess water.
As the water level rises so will the level of water within the siphon, until it reaches the
‘spillover’ point. At this point the water within the syphon will cascade down the down tube
and into the pan preventing any further increase in the height of the water within in the
cistern.
When choosing an Opella syphon please make sure the bottom of the coloured cap (the
‘Spillover’ point, point P) is lower then any existing exit point within the cistern, i.e lever
handle / side lever / side inlet internal overflow and cistern rim.
features •fitting instructions
LF00145
Delchem®
Dualflush
siphon
Opella Limited
Twyford Road, Rotherwas Industrial Estate, HEREFORD HR2 6JR, England.
t: [phone] f: [phone] w: www.opella.co.uk e: [email protected]
• Variable flushing volumes
• Facilitates internal overflow
• 11 /2”BSP outlet
Opella Dual Flush Siphon
Full Flush: Depress and let go.
Short Flush: Depress and hold till
 ushhascompleted.
External
overflow
Water line
Siphon Siphon
'Spillover'

STAGE 1
Pre-installation
Turn off water supply to cistern and remove cistern lid.
While still full, mark the normal water level on the inside of the cistern.
Flush the cistern and remove all remaining water with a sponge or cloth.
Disconnect the ‘C’ link from the flushing lever and save for use again if required.
Remove old siphon.
STAGE 2
Fitting your Delchem®Dualflush siphon
1
2
3
4
5
Turn off
water supply
and remove lid
Disconnect ‘C’
link from
flushing lever
Remove old
siphon
Mark
water
level
Flush and
remove all
remaining
water
Washer
Siphon bung
(see table below for
required flushing)
1
1
2
3
4
5
6
7
8
9
10
11
2
3
4
5
Backnut
Flushpipe sealing
washer
Coupling nut
Point P
6 litres 7 litres 9 litres
Point P
C-link
Siphon Flushing Volumes
(Indicative values only)
Label position for low level
and close coupled cisterns
Label position for high
level cisterns
For high and low level cisterns
Undo the coupling nut below the
cistern and undo the siphon backnut.
Take the old siphon unit out of the
cistern and fit new siphon ensuring
that the rubber washer is on the
inside of the cistern.
Hand tighten the backnut and
tighten a further quarter of a turn
using suitable grips.
Refit the ‘C’ link.
Refit the flush pipe sealing washer
and coupling nut.
Now fit your waterproof label as
instructed.
For close coupled cisterns
Disconnect the water supply from the
tailpipe of the filling valve.
Undo the wingnuts at the rear of the
WC pan, undo the wall fixing screws
inside the cistern.
Carefully lift the cistern from the WC
pan.
Remove the large ‘doughnut’ shaped
washer, then undo the siphon backnut.
Take the old siphon unit out of
the cistern during which it may be
necessary to remove some or all of
the filling valve assembly.
Fit the new siphon into the cistern
ensuring that the rubber washer is on
the inside of the cistern.
Hand tighten the backnut and tighten
a further quarter of a turn using
suitable grips.
Place a new doughnut washer on the
thread and carefully reposition the
cistern on the WC pan.
Replace the wall fixing screws and the
wingnuts.
Refit the ‘C’ link.
Reconnect the water supply to the
filling valve.
Now fit your waterproof label as
instructed.
Note Ensure that point 'P' on the new
siphon sits below the lowest overflow
point of the cistern including all
apertures.
1
2
3
4
5
6
12