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BWT ET-NU25 Instrucciones De Colocación página 17

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1.
TECHNICAL DATA
Primary
Secondary
Power
Flow rate
Primary connections
Secondary connections
Operating temperature
Max operating pressure
2.
INSTALLATION OF THE HEAT EXCHANGER
2.1
Installation site
Heat exchangers must be installed in accordance with the rules of the art and the standards in effect.
The heat exchanger should be installed as close as possible to the boiler in order to minimise heat loss.
If this is not possible, you will need to lag the primary circuit pipes with thermal insulation.
For optimum heat exchange, the flows in the primary circuit and secondary circuit must cross within the
exchanger.
The heat exchanger must be connected directly to the boiler's hot water production system. It should
under no circumstances be plumbed into an existing network (radiator circuit, residential hot water
supply circuit, etc.).
To mount the heat exchanger, use the support plate as a template to mark out the 4 holes that need to
be drilled in the wall.
2.2
Hydraulic connections
Boiler
Filter
CHAUFFAGE ET DÉSHUMIDIFICATION
Unit
°C
°C
kW
Primary
m
/h
3
Secondary
PVC union, female, solvent 50 to 63 mm
Pool water
Primary
water loop
Primary
Secondary
Buffer tank
From the boiler
Primary circuit (to the boiler)
Ø 50 or Ø 63 solvent
Valve
Pump
Suction
MK1
MK2
90
45
90
45
25
25
27
8
43
12
0.72
1.2
4.5
5
Threading 3/4ʺ
2 to 40 °C
45 to 90 °C
2 bars
1.5 bars
s
chematic diagram of a
standard installation
BWT Heat exchanger
3/4'' screwed
3/4'' screwed
PVC union
PVC union
Ø 50 or Ø 63 solvent
By-Pass
treatment
2021/07 - Indice de révision : K - Code : 33035
MK3
MK4
90
45
90
25
58
17
95
1.74
6.5
Water
Return
45
25
27
1.8
11
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