I-33
G-084383_EN • 03
P
roduct
I
nstallatIon
3.58 The discharge pipe (D2) should be at least
one pipe size larger than the nominal outlet size of
the safety device unless its total equivalent hydraulic
resistance exceeds that of a straight pipe 9m long,
i.e. for discharge pipes between 9m and 18m the
equivalent resistance length should be at least two
sizes larger than the nominal outlet size of the safety
device; between 18 and 27m at least 3 sizes larger,
and so on; bends must be taken into account in cal-
culating the fl ow resistance. See fi gure, table and the
example.
3.59 Where a single common discharge pipe
serves more than one system, it should be at least
one pipe size larger than the largest individual dis-
charge pipe (D2) to be connected.
3.60 The discharge pipe should not be con-
nected to a soil discharge stack unless it can be
demonstrated that that the soil discharge stack is
capable of safely withstanding temperatures of the
water discharged, in which case, it should:
a. contain a mechanical seal, not incorporat-
ing a water trap, which allows water into
the branch pipe without allowing foul air
from the drain to be ventilated through the
tundish;
b. be a separate branch pipe with no sanitary
appliances connected to it;
c. if plastic pipes are used as branch pipes
carrying discharge from a safety device
they should be either polybutalene (PB) to
Class S of BS 7291-2:2006 or cross linked
polyethylene (PE-X) to Class S of BS 7291-
3:2006; and (d) be continuously marked
with a warning that no sanitary appliances
should be connected to the pipe.
î
Plastic pipes should be joined and
assembled with fi ttings appropri-
ate to the circumstances in which
they are used as set out in BS EN
ISO 1043-1.
î
Where pipes cannot be connected to the
stack it may be possible to route a dedicated
pipe alongside or in close proximity to the dis-
charge stack.
The temperature/pressure relief valve
should only be replaced by a qualifi ed
professional.
Do not tamper with control or safety
valves or use them for any other pur-
pose than what they are intended for.
Make sure that the discharge pipe is
not blocked or used for any other pur-
pose than what is is intended for.
Do not locate the tundish close to any
electrical components.
Termination of discharge pipe
3.61 The discharge pipe (D2) from the tundish
should terminate in a safe place where there is no
risk to persons in the vicinity of the discharge.
3.62 Examples of acceptable discharge ar-
rangements are:
a. to a trapped gully with the end of the pipe
below a fi xed grating and above the water
seal;
b. downward discharges at low level; i.e. up
to 100mm above external surfaces such
as car parks, hard standings, grassed ar-
eas etc. are acceptable providing that a
wire cage or similar guard is positioned to
prevent contact, whilst maintaining visibility;
and
c. discharges at high level: e.g. into a metal
hopper and metal downpipe with the end of
the discharge pipe clearly visible or onto a
roof capable of withstanding high tempera-
ture discharges of water and 3m from any
plastic guttering system that would collect
such discharges.
3.63 The discharge would consist of high tem-
perature water and steam. Asphalt, roofi ng felt and
non-metallic rainwater goods may be damaged by
such discharges.
i
Summary of Contents for COILMASTER 100
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Page 92: ...I 92 G 084383_EN 03 Declaration of Conformity...
Page 93: ...I 93 G 084383_EN 03 NOTES...
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