Thomas Dudley Diplomat Installation Instructions

Diplomat, Tri-Shell & Elite
Dudley cisterns are designed to be fixed flat to the wall with suitable rust resistant screws (not supplied) using the holes provided.
Cisterns can be fitted for right or left hand operation.
WARNING
No sealing compound, paste, flux, silicone or solvent to be used in contact with plastic or rubber surfaces, to avoid damage to plastic
components. Rubber washers should provide adequate seal. PTFE tape may be used on threads. Do not overtighten plastic nuts.
No chemical block/additive to be used in this cistern.
Before fixing the cistern to the wall, it is advisable to fit the cisterns internal components...
1
INSTALLATION INSTRUCTIONS
Important: The cistern is factory set to give a full flush of 6 litres. 6
litre flushing is the maximum permissible flush for new WC
installations. The cisterns are capable of being set up to deliver a 6
litre or maximum full flush (Fig. 1). Flush volumes above 6L should
only be used when retrofitting to older WC installations. To convert
a dual flush syphon to single flush see section 2 overleaf.
Syphon Installation
Install the syphon with it's rubber sealing washer inside cistern.
Secure with 1½" BSP back nut. Before fixing the cistern to the wall,
it is advisable to fit the remainder of all internal components. Insert
flush bend into tail of syphon with the cap nut & rubber
compression ring in place. Hand tighten the cap nut. Depending on
the height of the cistern from the floor, it may be necessary to cut
the flush pipe. Remove traces of burr. No more than 50mm (2") of
flush pipe to be inserted into the syphon down leg. (Fig. 2).
Ball Float Valves
Bottom and side entry types are fitted with 3mm (1/8") bore high
pressure seats (white) to suite mains water supply. A low pressure
6mm (1/4") bore seat (red) is also provided for use only when the
cistern is fed from a low pressure supply i.e. a storage tank. Screw
ball float onto the end of the arm before fitting valve. Set float
position after fitting in to cistern if it is fitted with a swivel arm.
(Fig. 3).
Side Entry
Screw a spigot nut onto the tail with spigot side facing inwards.
Locate the valve tail through the cistern wall. Tighten the second
spigot nut with spigot facing towards the cistern to centralise
valve in hole. (Fig. 4).
Pedestal Bottom Entry
Locate the pedestal float valve tail through the base of the cistern
with rubber sealing washer on the inside. Secure using spigot nut
facing inwards to locate the pedestal centrally in the cistern hole.
Position pedestal to ensure free movement of the float arm. Trim
the bracing stay so that it touches the cistern wall and tighten
spigot nut. (Fig. 4).
Important: Make certain that the float arm moves freely in a
vertical path and does not contact other internal components.
Position the overhead discharge elbow (Fig. 3) so that it is not
directed into the reservoir of the syphon. (Fig. 3).
Equilibrium Inlet Valves
Follow the instructions supplied with the inlet valve.
Water Level
Adjust the inlet valve float arm with the adjusting screw and lock
nut or the float on the equilibrium inlet valves. So that the valve
shuts off at the required marked water line. Re-check and adjust if
necessary. (Fig. 4).
CISTERN INSTALLATION INSTRUCTIONS
Plug A
Flush Water Line
6 Litre 6L
MAX 6L
Maximum flush volume will deliver up to 9 Litres depending on cistern size.
Fig 1
Syphon
down leg internal
warning pipe
Rubber washer Back nut
Flush bend Compression ring
Cap nut
Fig 2
Swivel Arm
Ball Float
Fig 3
Adjusting screw & lock nut
Fig 4
Plug A
Plug A
Out
In
High level
fulcrum lever
Pull
Discharge Elbow
Syphon Reserver
Bracing stay
Rubber Washer
Spigot Nut