E93.1001EN.C Manual CD
+
53
T
WO
CD
+
100
WATER HEATERS WITH TWO
EWD450
TANKS
Water heater connections, encoding:
For this system rule 2 must be applied.
Number the water heaters: water heater-1 is the water heater furthest from the tank(s), see picture.
Encode de connection pipes directly connected to the water heaters: D1, see picture.
Encode de horizontal connection pipes:
-
hot water pipes starting at water heater-1: D1 up to D (= in this example only D1 and D), see picture.
-
return pipes starting at water heater-last (= water heater-2): D1 up to D (same remark), see picture.
Pipe sizes, water heater side:
From tables
A, B
and
C
, CD
+
100:
-
All pipes D1 in the picture must measure at least 54
1,5 [mm
mm] (tables
A
and
B
)
-
The pipes D must measure 67
1,9 [mm
mm] (table
C
)
Tank connections:
From
table
D
, 2
nd
block (CD
+
100): for 2 tanks D
T
= 54
1,5 [mm
mm].
So for this system, pipes sized at least 54
1,5 [mm
mm] are to be applied for all connections directly on water
heaters and tanks, and pipes sized at least 67
1,9 [mm
mm] for the connections between them.
Length of the connecting pipes water heaters
↔
tanks
From
table
E
:
The maximum total length of flow and return pipes 67
1,9 [mm
mm] is 26,1 m.
So when 67
1,9 [mm
mm] is applied, the physical distance between water heaters and tanks may be half of
this, so ~ 13 m, at max. Using bends and/or valves, this distance becomes less than 13 m. Use table
E
.
Pump
From table
F
: Use two pumps
P2
.
1
2
= 54x1.5
= 67x1.9
D1
D1
D1
D1
D1
D
D1
D
1
2
D
D
T
D
T
D
T
D
T
D
D
KOUD IN
2 water heaters
CD
+
100
2 tanks
EWD450
Example 2
COLD IN
