Zeus Maior 24 Instructions
The discharge pipework from the tundish:-
1. Shall fall continuously through its length.
2. Shall be of a heat resistant material, e.g. metal.
3. Shall not be fitted with any valves or taps.
4. Shall discharge to a safe visible position, e.g. onto the surface of an external wall or into a gulley.
5. Shall have a minimum of 300 mm straight pipe work directly from the tundish.
Note:
Where children may play or otherwise come into contact with discharges, a wire cage or similar
guard must be positioned to prevent contact whilst maintaining visibility.
Please see the diagrams below for suggested methods of terminating the discharge pipe safely. Where a
single pipe serves a number of discharges, such as in blocks of flats, the number served should be limited
to not more than 6 systems so that any installation can be traced reasonably easily. The single common
discharge pipe should be at least one pipe size larger than the largest individual discharge pipe to be con-
nected. If the system is installed where discharges from safety devices may not be apparent, i.e. in dwell-
ings occupied by blind, infirm or disabled people, consideration should be given to the installation of an
electronically operated device to warn when discharge takes place.
High Level Termination
At high level, discharge onto a roof is acceptable pro-
viding the roof is capable of withstanding high tem-
peratures and there is a distance of 3 m from any
plastic guttering systems that would collect such dis-
charge.
Example:-
The example below is for a G½ temperature relief valve with a
discharge pipe (D2) having four elbows and a length of 7 m from the
tundish to the point of discharge.
From Table :-
Maximum resistance allowed for a straight length of 22 mm copper discharge pipe (D2) from a G½ tempera-
ture relief valve is 9 m. Subtract the resistance for four 22 mm elbows of 0.8 m each = 3.2 m. Therefore the
maximum permitted length equates to 9 - 3.2 = 5.8 m
5.8 m is less than the actual length of 7 m therefore calculate the next largest size.
Maximum resistance allowed for a straight length of 28 mm pipe (D2) from a G½ temperature relief valve
equates to 18 m.
Subtract the resistance for four 28 mm elbows at 1.0 m each = 4 m.
Therefore the maximum permitted length equates to 18 - 4 = 14 m
As the actual length is 7 m, a 28 mm (D2) copper pipe will be satisfactory
.
300mm Min
D1
D2
Type 'A' Air
Gap
End of pipe
clearly visible
Tundish installation
500mm
max
Metal Discharge
to Tundish (D1)
Tundish
Heat Resistant
discharge pipe
with continuous fall
300mm Min
