The company reserve the right to alter size, shape and specification without prior notice
Page 10
3.3.4. Removing/fixing the front and top case
Grasp the front case by its sides, pull it towards the front and remove it by
lifting it off the unit, push top cover towards back and lift it off the unit.
3.4. Plumbing & Heating installation & commissioning
3.4.1. Installation
On RS - E boilers fit the supplied safety valve to the heating return point on the installation– see point 12 page 4
diagram. Ensure that no valve is placed between the safety valve and the boiler.
To avoid draining the entire primary system during boiler maintenance it is recommended that isolation valves are
fitted to the flow and return pipes immediately below the boiler.
Connect the primary flow and return pipes for the central heating system to the labeled connections on the boiler.
Connect the mains water supply via a filling loop to the charge and discharge valve on the boiler incorporating a
stop valve and double check valve which must be left disconnected after commissioning.
Drain taps must be located in accessible positions which permit the draining of the whole system including the
primary and the secondary (dhw) system.
Any water loss from the system should be replaced from the filling loop connection.
When draining the boiler allow air in using the boiler venting valve. Do not drain the boiler by opening the
pressure relief valve.
All capillary joints in all DHW pipework must be made with lead free solder.
The Plus - E and PTV - E are self contained system boilers that manage heating flow to the radiators and or
under floor. The PTV – E also supply heat to a domestic hot water cylinder. External motorized valves are not
required (excepting when a PTV – E is connected to an Unvented Water Heater) and therefore systems such as
S & Y plan are not applicable. As motorized valves are not used a bypass is not normally required. Product
diagrams on pages 6 & 8 display the expansion vessel and pumps.
Plus - E and PTV – E can also be used on an open vented central heating system.
Wherever possible all pipe work should be insulated to help prevent heat loss and possible freezing, particularly
where pipes are run through roof spaces and ventilated under-floor spaces.
3.4.2. Ancillary components
On RS - E boilers a boiler pressure gauge, circulation pump and expansion vessel must be fitted, see diagram
page 6. The expansion vessel should be sized to the total system volume. The water capacity of the boiler itself is
6 liters.
Diagram of recommned pump on RS-E for radiator heating
Diagram of recommned pump on RS-E for underfloor heating
If the capacity of the in built expansion vessel on Plus - E & PTV - E is not sufficient for the heating system
(indicated by pressure increase of 0.6bar when system is heated), an additional expansion vessel can be installed
external to the boiler. This should be fitted to the return pipe as close as possible to the boiler.
To comply with Part L of building regulations, a room thermostat must be fitted with the boiler. This will work in
conjunction with the boiler software and outside temperature sensor to finely control the temperature in the
