Gulfstream GS A-Class 12/OV, Инструкции по проектированию, установке и обслуживанию

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Page 13
GULFSTREAM
A-CL
ASS
(b) We would recommend that the best results
for a balanced system are achieved by fitting
appropriate flow restrictors to each hot and
cold water outlets. These must be fitted in
cases where the final branch pipe sizes are
not as recommended in (c) below or the
water pressures are above the recommended
2 – 3 bar range. See appendix A for details of
suitable flow regulators.
(c) Alternatively the tee-offs to the outlets
should be in 10mm except for bath and
shower, which should be in 15mm (I meter
minimum length).
(d) The hot water supply to a shower-mixing
valve should be the first draw-off point on
the circuit. The cold water supply to a shower-
mixing valve should be fed directly from the
rising main and should be the first draw off
point on the cold water circuit.
(e) It is important that the cold water pipe work
is adequately separated from any heating/
hot water pipe work to ensure that the water
remains cold and of drinking water quality.
3.2.4 Taps and Shower Fittings
(a) Ensure that all terminal fittings are suitable
for mains pressure. Use aerated taps
whenever possible to prevent splashing.
(b) Any shower mixing valve used must be
suitable for mains fed hot and cold supplies.
However all mains pressure water systems
are subject to dynamic changes particularly
when other hot and cold water taps are
opened and closed. For this reason, a
thermostatic shower MUST be used with
this appliance.
(c) Note that the shower fittings must comply
with the backflow prevention requirements
(Para 15, Schedule 2) of the Water Supply
Regulations 1999.
(d) A bidet can be supplied from the
GulfStream A-CLASS appliance as long as it is of
the over rim flushing type and incorporates
a suitable air gap.
3.2.5 Dead leg volumes
If the dead leg volumes of the hot water
draw-off pipework is excessive and the
delivery time will be more than 60 seconds
before hot water is available at the tap, you
may consider using trace heating such as the
‘RaychemHWAT’ system. Please call Gledhill
technical department for further details.
SYSTEM DESIGN