1
INTRODUCTION
These instructions are designed to be read in conjunction with the main product installation manual. Particular attention should be paid to
all the relevant legislative requirements, including Building Regulations, Water Regulations, IEE Wiring requirements and good practice.
This installation shall only be conducted by a person competent to do so.
This pre-plumb unit is a stainless steel unvented indirect hot water storage cylinder with factory built hot water central heating controls
assembled onto the front outer case of the cylinder
.
The cylinder may be a single coil indirect for connection to a fossil fuel boiler or a
twin coil unit for integration with a solar panel system, which in this instance, the pre-plumb controls are assembled onto the upper coil.
In addition to the components supplied with a standard (non pre-plumb) the following are included:-
COMPONENT
SINGLE ZONE KIT
QUANTITY
TWIN ZONE KIT
QUANTITY
FITTED /
LOOSE
PRE-PLUMBED
& / OR WIRED
Pipework Manifold
1
1
Fitted
Two Port Motorised Valve
2
3
Fitted
PCB Wiring Centre
1
1
Fitted
Dual Cylinder Thermostat
1
1
Fitted
6m Head Circulator
1
1
Fitted
Auto By-Pass Valve
1
1
Fitted
Auto Air Vent
1
1
Fitted
Sealed System Filling Loop
1
1
Fitted
Primary Adapter C/W Expansion Valve & Gauge
1
1
Loose
Primary Expansion Vessel
(120 - 210 = 12L Exp, 250 = 18L Exp, 300 = 24L Exp)
1
1
Loose
System Programmer
1 x Two Channel
1 x Three Channel
Loose
Room Thermostat
1
2
Loose
POTABLE WATER CONNECTIONS
The potable (secondary) water connections are 22mm compression and are connected under the same manner as listed in the main
installation manual. These connections include; cold mains to inlet control set, equalised cold supply from inlet control set, hot water draw
off, secondary return connection (where fitted), expansion vessel, vessel bracket and vessel fitting, and tundish disharge pipework.
PRIMARY WATER CONNECTIONS
All primary pipework connections are 22mm compression with gland nut and olive at each connection point and require connection in the
standard method.
Boiler flow:-
Remove and discard the transit pipe under the circulating pump by releasing the outer of the pipe clamp and the gland nut to
the pump isolation valve. Connect the boiler flow pipework directly into the pump isolation valve re-using the pipe clamp to provide
support to both the pipework and the circulating pump.
Heating flow:-
Connect from the 2-port heating valve the heating flow into the radiator circuit.
Heating Return
:-
The heating return pipework returns back into the pre-plumb cylinder pipework connecting to the 22mm connection on
the left hand side of the unit adjacent to the dual cylinder thermostat.
Boiler Return:-
The pipework connection from both the central heating and the hot water circuit is the lower left 22mm connection below
the heating return. This connection requires piping directly back to the boiler.
Primary Expansion:-
This pre-plumb unit is supplied c/w a manifold connector facilitating the expansion vessel, expansion discharge
valve and pressure gauge. The assembly is usually installed in the pipework adjacent to the boiler appliance - see both the boiler
manufacturers requirements and the instructions provided with the components supplied. Check the vessel is charged to 1.5 bar on
installation. Ensure the discharge pipe terminates at a point where the discharge of hot water is visible, yet does not cause any danger to
persons.
