E93.1001EN.C Manual CD
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45
9.4
Cascade systems: pipe codes
I
NTRODUCTORY NOTES TO THE USE OF THE TABLES
With the tables in § 9.5 (page 47 up to 49) the diameters of the several connection pipes in a cascade can be
assessed.
To use the tables in a straightforward manner, water heaters are numbered and pipes are encoded in this manual.
Connect all water heaters and tanks according to the scheme below (Tichelmann system). Then by definition,
water heater-1 is the one that, along the hot water pipes, is situated the furthest away from the tanks (see figure
9.1 below).
The pipe codes then are set as pointed out below. With the codes, pipe diameters can be found in the tables per
water heater type, for a number of possible water heater-tank combinations.
All tables and examples have been designed for maximally eight water heaters and maximally eight tanks. For
larger cascades, contact EHS.
P
IPE CODES
NB! Pipe codes are different from previous editions/revisions of this manual;
in the new approach, equal pipes have equal codes, as much as possible.
In figure 9.1 and figure 9.2 all codes can be found, for explanation see next page
→
Figure 9.1 Pipe encoding water heaters’ side
Figure 9.2 Pipe encoding tanks’ side
D1
D1
D1
D1
D1
D1
D1
D1
D2
D3
D
D
D5
D3
D4
D1
D1
D4
D2
D1
D
D5
D1
D1
D1
D6
D6
D1
D1
D7
D7
1
2
3
4
5
6
7
8
Tanks
D1
D1
D
D
T
D
T
D
T
D
T
D
D
D
T
D
T
D
D
D
D
T
D
T
D
D
T
D
T
D
D
T
D
T
D
D
D
D
T
D
D
T
D
D
T
D
T
D
D
Ketels
Water
heaters
COLD IN
