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1.
Pressure reducing valve
(mandatory)
2.
Inlet combination
(mandatory)
3.
T&P valve
4.
Stop valve (recommended)
5.
Non-return valve
(mandatory)
6.
Circulation pump (optional),
pump flow 1500 l/h, e.g.
Grundfos ST 15/11-2
8.
Program-controlled pump
(mandatory)
9.
Drain valve
c
n
7.4
7.4.1
w
7.4.1.1
0311767_HWH_32-129_II_UKUK_V2.4, 2020-01-31
10.
Manual gas valve
(mandatory)
11.
Service stop valve
(recommended)
12.
Temperature gauge
(recommended)
13.
Condensation drain
(mandatory)
14.
Draw-off points
16.
Expansion vessel
(mandatory)
17.
3-way aeration valve
(recommended)
18.
Cold water head tank
Caution
The installation diagram shows a pump station with an integrated non-return valve. This
type of pump unit may only be used with closed systems. In systems with drain-back,
installation of a pump unit with non-return valve is prohibited. There are special pump
units for these systems. Please contact the pump unit supplier for this.
Note
Use this installation diagram when you:
•
install the water connections (see section 7.4)
•
install the condensate drain
•
install the gas connection (see section 7.5)
•
fill the water heater
•
drain the water heater
Water connections
Unvented water connections
Warning
The installation should be carried out by a competent person, in compliance with general
and locally applicable regulations.
Cold water side
See (A) in the installation diagram.
1.
Fit an approved stop valve (4) on the cold water side as required by the applicable
regulations.
2.
The maximum working pressure of the water heater is 8 bar. Because the pressure
in the water pipe at times can exceed 8 bar, you must fit an approved pressure-
reducing valve (1).
3.
Fit a non-return valve (5) and an expansion vessel (16).
4.
Fit an expansion valve (15) and connect the overflow side to an open waste water
pipe.
19.
Float switch
26.
Air bleed (mandatory)
37.
Combined Q/T sensor
(optional)
38.
Solar heating system
pump station
(modulating–mandatory)
42.
Solar heating system
controller
A.
Cold water supply
B.
Hot water supply
C.
Circulation pipe
D.
Gas supply
E.
Overflow pipe
F.
Supply heat exchanger
G.
Heat exchanger return
Overflow protection
S
Collector sensor
1
(mandatory)
S
Tank sensor
2
(mandatory)
S
Top of tank sensor
3
(mandatory)
S
Solar heating system
4
return sensor (optional)
57
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