Pre-installation
Greenstar i System
ErP
- 6 720 806 945 (2015/07)
16
4
Pre-installation
4.1
Cleaning primary systems
Before cleaning the system:
▶ Ensure that the system and pipe work is in good working order.
▶
Where possible keep the existing appliance/circulating pump in
place when flushing the system.
Follow the guidance of BS7593:
Treatment of water in domestic hot water central heating and also the
flushing guidelines below.
Flushing the system
▶ Fill the system with cold water and check for leaks.
▶ Open all drain cocks and drain the system.
▶ Close drain cocks and add a suitable flushing agent
compatible with
aluminium
at the correct strength for the system conditions in
accordance with the manufacturer‘s instructions.
The pH value of the system water must be less than 8 or the
appliance guarantee will be invalidated.
▶ Circulate the flushing agent before the appliance is fired up.
▶ Run the appliance/system at normal operating temperature as
directed by the manufacturer of the flushing agent.
▶ Drain and thoroughly flush the system to remove the flushing agent
and debris.
▶ It may be necessary to use a power flushing machine to aid the
cleansing procedure in some circumstances.
▶ Close the drain cocks and refill with fresh water and a suitable
inhibitor.
▶ Vent any air from the appliance and system.
Inhibitor
Add a suitable inhibitor or combined inhibitor/anti-freeze, if the system
is exposed to freezing conditions, to the heating system in accordance
with the DWTA code of practice and manufacturer‘s guidelines.
Water treatment products
Suitable water treatment products can be obtain from the following
manufacturers:
Artificially softened water
It is possible to have an ion exchange water softener fitted to the cold
water system of the property. However, the appliance requires an
untreated cold water connection taken from the mains supply, before
the water softener, to the primary water filling point of the heating
system.
4.2
Mains supply
4.2.1
Electrical supply
• Supply: 230V - 50 Hz
• Cable: PVC insulated 0.75mm
2
(24 x 0.2mm) temperature rated to
90 °C.
• External 3A fuse to BS1362.
• The appliance must be earthed.
• This appliance must not be connected to a 3 phase supply.
• IPX4D.
• Wiring must comply with the latest edition of BS 7671 (IET wiring
regulations).
4.2.2
Gas supply
• Appliances using Natural Gas (NG) must be connected to a governed
meter.
• Liquid Petroleum Gas (LPG) must be connected to a regulator.
• Installation and connection of the gas supply to the appliance must
be in accordance with BS6891.
• Gas pipe sizing should be calculated to ensure no more than the
permitted mbar drop between the meter/governor to the appliance
inlet. (
section 6.5.2).
• The meter or regulator and pipe work to the meter must be checked,
preferably by the gas supplier.
This is to ensure that the equipment is in good working order and can
meet the gas flow and pressure requirements, in addition to the
demand from any other appliance being served.
DANGER:
Danger to life through electric shock!
▶ Before carrying out any work on electrical
components, isolate them from the power supply
(230 V AC) (fuse, circuit breaker) and secure against
unintentional reconnection.
NOTICE:
Risk of damage to appliance or accessories!
▶ All the following pre-installation sections must be
read and requirements met before starting the
appliance or flue installations.
NOTICE:
Risk of damage to system or appliance!
Debris from the system can damage the appliance and
reduce efficiency. Failure to comply with the guidelines
for the use of water treatment with the appliance will
invalidate the appliance guarantee and contravene the
Building Regulations.
▶ It is a requirement of the Building Services
Compliance Guide which is a second tier document
to the Building Regulations to flush and inhibit the
primary water system in accordance with BS 7593.
▶ It is recommended that you fit a primary water
cleanser to the system. Worcester recommends
fitting a filter that will help remove both magnetite
and non-magnetic debris.
NOTICE:
Artificially softened water must not be used to
fill the central heating system.
▶ Do not use artificially softened water to fill the central
heating system.
WARNING:
Sealing agents
Normally the addition of sealing agents to the system
water is not permitted as this can cause problems with
deposits left in the heat exchanger.
▶ In cases where all attempts to find a micro leak have
failed, Worcester, Bosch Group supports the use of
Fernox F4 leak sealer.
FERNOX
0870 601 5000 or www.fernox.com
SENTINEL
0800 389 4670 or www.sentinel-solutions.net
NOTICE:
IP rating change
IP rating IPX4D is reduced to IP20 if the following
controls are fitted;
MT10, 7 716 192 036 or MT10RF, 7 716 192 037
or FR100 7 716 192 067.
This is reduced to IPX2D when the Sense II
7 738 111 064 is fitted.
