Glow-worm 18-30sxi Range - Manual (Page 16)

16 0020008155A
5.1 General
General - All domestic hot water circuits, connections, fittings
must be in accordance with the relevant standards and water
supply regulations.
For GB: Guidance G17 to G24 and recommendation R17 to
R24 of the Water Regulations Guide.
For IE: The current edition of I.S.813 "Domestic Gas Installations".
The domestic water hot service must be in accordance with the
current issue of BS5546, refer also to the current issue of
BS6700.
TEMPORARY
CONNECTION
HOSE
UNION
HOSE
UNION
SUPPLY
PIPE
CONTROL
VALVE
CONTROL
VALVE
DOUBLE
CHECK
VALVE
BOILER
RETURN FLOW
HEATING
CIRCUIT
DRAIN
POINT
SUPPLY
PIPE
AIR GAP
TUNDISH
CONTROL
VALVE
CONTROL
VALVE
TYPE CA BACKFLOW
PREVENTION DEVICE
BOILER
RETURN FLOW
HEATING
CIRCUIT
DRAIN
POINT
Method 1
Method 2
4 Heating System
Diagram 4.2
4.6 Water Treatment
In the case of an existing installation, it is ESSENTIAL that prior
to installing the new boiler the system is thoroughly flushed. For
optimum performance after installation of a new system, the
boiler and its associated central heating system should also be
flushed. Flushing should be carried out in accordance with
BS7593: 1992 using a cleanser such as Sentinel X300 or X400,
or Fernox Superfloc.
For long-term corrosion protection, after flushing, an inhibitor
suitable for stainless steel exchangers should be used, refer to
the current issue of BS 5449 and BS 7593 on the use of
inhibitors in central heating systems. Examples are Sentinel
X100 and Fernox.
IMPORTANT: It is ESSENTIAL that the cleanser is fully removed
from the system after flushing and before adding inhibitor. Take
care to ensure that all low points in the system are fully drained.
For all systems follow the manufacture's instructions, but where
new radiators are fitted do not leave the cleanser in the system
for longer than 24 hours.
4.7 Draining Tap
A draining tap must be provided at the lowest points of the
system, which will allow the entire system to be drained.
A drain tap for the appliance is provided as an integral part of the
hydroblock, see diagram 12.11.
11593
5.2 Domestic Hot Water Cylinder
SINGLE FEED INDIRECT CYLINDERS ARE NOT SUITABLE
AND SHOULD NOT BE USED.
The domestic hot water cylinder must be of the double feed
indirect coil type. It must be suitable for working at a gauge
pressure of 0.35bar above the safety valve setting.
5 Domestic Hot Water System