Mains Supply; Electrical Supply; Water Supply; Oil Supply - Worcester Greenstar Heatslave II 12/18 Installation, Commissioning & Servicing Instructions

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.
Artificially softened water must not be used to fill the
central heating system.
4.2

Mains supply

4.2.1

Electrical supply

• Supply: 230V - 50 Hz
• Cable: PVC insulated 0.75mm
90°C.
• Circuit breaker incorporating earth leakage protection.
• External 5A fuse to BS1362.
• The appliance must be earthed.
• This appliance must not be connected to a three phase supply.
• Wiring must comply with the latest IET wiring regulations.
• It must be possible to isolate the appliance from the electrical supply
with at least a 3mm contact separation in both poles supplying the
appliance.
• Wiring between the appliance and the electrical supply must comply
with IET wiring regulations and any local regulations that may apply
for fixed wiring to a stationary appliance.
• Any system connected to the boiler must not have a separate
electrical supply.
4.2.2

Water supply

The following are general requirements and if necessary the advice of
the local water company should be sought before fitting the appliance.
• The appliance cold water supply should be the first connection off
the water main where possible.
• The appliance will accept pre-heated hot water to a maximum of
60°C
Mains water pressure
NOTICE: Boiler damage
▶ Non-return, back flow prevention devices (including
those associated with water meters) fitted to the
mains water supply can cause a pressure build up
which could damage the boiler and other household
appliances.
Minimum dynamic mains water pressure for maximum
performance
12/18kW 18/25kW
1.5bar 1.2bar
• Maximum mains fed water pressure 10 bar. If necessary, fit a
pressure reducing valve.
• Where the water main supply has a non-return, back flow prevention
valve fitted, a mini expansion vessel (A) must be connected to the
mains water inlet pipe (B) between the non-return valve (C) and the
boiler (D) as shown in figure 3.
Greenstar Heatslave II External ErP - 6 720 813 345 (2014/09)
2
(24 x 0.2mm) temperature rated to
25/32kW
1.6bar
A
C
B
Fig. 3 Mains expansion vessel
[A] Mini expansion vessel
[B] Mains water inlet
[C] Non return valve
[D] Boiler
Use in hard water areas
Normally there is no need for water treatment to prevent scale formation
as the maximum temperature of the heat exchanger is limited by the
electronic control circuit.
In areas where the temporary water hardness exceeds 200ppm,
consideration may need to be given to the fitting of a scale prevention
device. In such circumstances, the advice of the local water authority
should be sought.
4.2.3

Oil supply

NOTICE: Contaminated oil supplies can damage the
appliance.
Failure to ensure that the oil supply is clear of
contaminants may invalidate the appliance warranty.
▶ Ensure the oil supply is free of contaminates and
measures are taken to prevent contamination of the
appliance.
• This appliance is suitable for Kerosene (Class C2) only, no other
fuel must be used.
• Plastic or steel tanks should be installed to BS 5410.
A steel tank should conform to BS 799: part 5 and have a slope of
1:24 away from the outlet with a sludge cock at the lower end.
• Do not use galvanised steel tanks or pipework for the oil system.
• Do not use soldered joints on the oil supply pipework.
Pre-Installation
D
9