Pre-Installation; Cleaning Primary Systems; Mains Supply; Electrical Supply - Worcester Greenstar FS 30CDi Installation, Commissioning And Servicing Instructions

PRE-INSTALLATION

3 PRE-INSTALLATION
3.1

Cleaning primary systems

NOTICE: Before installation
All the following Pre-Installation sections must be
read and requirements met before starting boiler or
flue installations.
CAUTION: 230V MAINS POWER
ISOLATE THE 230V MAINS SUPPLIES BEFORE
STARTING ANY WORK AND OBSERVE ALL
RELEVANT SAFETY PRECAUTIONS.
NOTICE: Protect the boiler
Debris from the system can damage the boiler and
reduce efficiency.Failure to comply with the
guidelines for the use of water treatment with the
appliance will invalidate the appliance warranty.
It is recommended that a primary water filter is fitted
to the system. Worcester offers two filters that helps
remove both magnetite and non-magnetic debris;
22mm version, part number 7 733 600 236 and a
28mm version, part number 7 733 600 237.
BEFORE CLEANING THE SYSTEM:
Ensure that the system and pipe work is in good working order.
Where possible keep the existing boiler/circulating pump in
place when flushing the system.
FOLLOW THE GUIDANCE OF BS7593:
"Treatment of water in domestic hot water central heating"
Follow "Flushing the system" guidance given below
NOTICE: ARTIFICIALLY SOFTENED WATER
Artificially softened water MUST NOT be used to fill
the system
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 boiler is fired up.
Run the boiler/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 boiler 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.
Products approved to the BuildCert standard are deemed as compatible
with the components and equipment within the boiler and system.
10
WARNING: Sealing agents
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.
Water treatment
Suitable water treatment products are available from the following
manufacturers:
ADEY 01242 546717
www.adey.com
FERNOX 0870 601 5000
www.fernox.com
SENTINEL 0800 389 4670
www.sentinel-solutions.net
Artificially softened water
It is possible to have an ion exchange water softener fitted to the cold
water system of the property. However, the boiler 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.
Alternatively there are water softening/treatment devices that do not
adjust or alter the pH levels of the water. With these devices it may not
be necessary to provide an untreated water by-pass to the primary water
filling point of the heat system.
3.2

Mains supply

3.2.1

Electrical supply

• Supply: 230V - 50 Hz.
• Cable: PVC insulated 0.75 mm
to 90°C. to BS EN50525.
• External 3A fuse to BS1362.
• The appliance must be earthed.
• This appliance must not be connected to a three phase supply.
• IPX4D.
• The wiring between the appliance and the electrical supply must
comply with the latest IET wiring regulations that apply to wiring a
fixed appliance
• Any system connected to the appliance must not have a separate
electrical supply.
3.2.2

Gas supply

• Boilers 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 boiler must be in
accordance with BS6891.
• Under no circumstance should be size of the gas supply pipe be less
than 22mm.
• The meter or regulator and pipe work to the meter or regulator 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.
Greenstar FS CDi
2
(24 x 0.2mmØ ) temperature rated
ErP
6720818079 (2016/04)