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12.6
HARD WATER AREAS
In areas were the water quality cannot be guaranteed i.e. hard water areas the Circulating pumps should be upgraded
to ensure the correct flow is maintained within the water heaters. The table below shows the alternative pumps to be
used. Please contact Lochinvar Technical Support for further guidance.
Model
Differential (K)
EKW46CE
EKW61CE
EKW86CE
EKW116CE
EKW146CE
EKW176CE
EKW206CE
EKW236CE
12.7
PRIMARY PIPEWORK HEADER SIZING
The tables below show the pipework header sizing required in order to ensure the correct flow rate is maintained
between the EcoKnight™ water heater and the LST direct storage vessel. Using the simple schematics shown in
section 12.7.2 size the pipework header A shown in blue and pipework header B shown in red.
Using the example schematics shown and assuming the EcoKnight™ is an EKW146CE in both cases the header
would be sized as:
Single unit = as there is only a single heater there is no common header so all the pipework should be 54mm.
2 units = the common header shown in red should be sized according to the table at 76mm with the pipework
between the header and each individual units shown in blue at 54mm.
MODEL
EKW46CE
EKW61CE
EKW86CE
EKW116CE
EKW146CE
EKW176CE
EKW206CE
EKW236CE
12.7.1
P
IPEWORK HEADER SIZES
FLOW
(Litre/sec)
10.0
0.98
10.0
1.17
10.0
1.80
10.0
2.82
10.0
3.19
12.2
3.30
12.2
4.00
13.3
4.20
PIPEWORK A BLUE SIZE (mm)
1
35
35
54
54
54
54
54
54
12.7.2
P
IPEWORK SCHEMATIC SHOWING PIPEWORK
Total System Pressure
Loss (Meter- H
0)
2
7.32
6.71
6.07
8.51
7.93
7.90
9.80
9.40
PIPEWORK B RED SIZE (mm)
NUMBER OF ECOKNIGHT™
2
42
42
54
67
76
76
108
108
A
AND PIPEWORK
Alternative Shunt Pump
LM900140A
LM900140A
LM900140A
LM900149A
LM900149A
LM900149A
LM900152A
LM900152A
3
4
54
67
54
67
67
76
108
108
108
108
108
108
108
108
108
108
B
44
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