28
A1009341-664Y8300 • B
G3 REQUIREMENTS AND GUIDANCE - UK ONLY
In the UK, for installation of Evo model appliances
directly onto the mains supply of water, ACV offer
bespoke unvented kits which have been sized to
the requirements of each individual appliance, and
contain all of the mandatory components you need to
comply with Building Regulations.
Unvented kits provided for ACV Evo models include:
• a 25L expansion vessel & mounting bracket,
• a 28mm combined pressure reducing valve (3.5
bar) & expansion relief valve (6 bar),
• a tundish,
• a flexi hose.
Discharge pipe from safety valves
The Building Regulation G3 requires that any discharge
from an unvented system is conveyed to where it is visible,
but will not cause danger to persons in or about the build-
ing.
The tundish and discharge pipes should be fi tted in accord-
ance with the requirements and guidance notes of Building
Regulation G3. The G3 Requirements and Guidance sec-
tions 3.50 - 3.63 are detailed below.
Essential instructions for safety
• The temperature/pressure relief valve should only
be replaced by a competent person.
• No control or safety valves should be tampered
with or used for any other purpose.
• The discharge pipe should not be blocked or used
for any other purpose.
• The tundish should not be located adjacent to any
electrical components.
For discharge pipe arrangements not covered by G3 Guid-
ance advice should be sought from your local Building
Control Offi cer.
Main characteristics :
• Any discharge pipe connected to the pressure relief
devices (Expansion Valve and Temperature/Pres-
sure Relief Valve) must be installed in a continuously
downward direction and in a frost free environment.
• Water may drip from the discharge pipe of the pressure
relief device.
• This pipe must be left open to the atmosphere.
• The pressure relief device is to be operated regularly to
remove lime deposits and to verify that it is not blocked.
G3 REQUIREMENTS AND GUIDANCE - UK ONLY
CONNECTION OF THE DHW CIRCUIT
Cold water
Hot water
Cold water
Hot water
Cold water
Hot water
Typical installation with internal DHW tank
Description
1. Isolating valve
2. Pressure reducing valve
3. Check valve
4. DHW expansion vessel
5. Safety valve*
6. Drain valve
7. Grounding
8. Draw-off tap
9. Thermostatic mixing valve
Typical installation with internal DHW tank
Description
1. Isolating valve
2. Pressure reducing valve
3. Check valve
4. DHW expansion vessel
5. Safety valve (internal)
6. Drain valve
7. Grounding
8. Draw-off tap
9. Thermostatic mixing valve
1 2 3
1
8
4
5
6
7
9
1 2 3
1
8
4
5
6
7
9
*
This appliance is equipped
from factory with a Tempera-
ture and Pressure safety valve
installed on the DHW circuit. In
the UK, make sure to comply
with G3 requirements. Also re-
fer to information above.
EN
Installation
Summary of Contents for WaterMaster 120 Evo
Page 48: ...ACV International Oude Vijverweg 6 B 1653 Dworp Belgium belgium service acv com www acv com...
Page 49: ...A1009341_664Y8300 B WaterMaster 25 35 45 70 85 120 Evo 25 45 70 X Evo ML...
Page 57: ...9 x4 x4 x4 1 2 x2 ML...
Page 59: ...11 x7 WM 25 35 45 Evo x9 WM25X 45X 70 85 120Evo x11 WM 70 X Evo x3 x2 ML...
Page 60: ...12 WaterMaster 70 X Evo x4 ML...
Page 61: ...13 6 3 2 1 x4 x4 WaterMaster 25 X 35 45 X 70 85 120 Evo ML...
Page 75: ...31 ML...
Page 76: ...ACV International Oude Vijverweg 6 B 1653 Dworp Belgium belgium service acv com www acv com...
