Technical Data; Installation Of The Heat Exchanger; Installation Site; Hydraulic Connections - BWT ET-NU25 Notice D'installation Et Conseils D'utilisation

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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

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
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
2020/11 - Indice de révision : J - Code : 33035
MK3
MK4
90
45
90
45
25
25
58
17
95
27
1.74
1.8
6.5
11
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