STIEBEL ELTRON Accelera 300 - 2.1.2 Symbols; 2.1.3 Keywords; 2.1.4 Symbols in this documentation; 2.1.5 Units of measure in this documentation

OPERATION
INSTALLATION
ENGLISH
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Draft
9.6 Water connection
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1 Hot water connection R ¾“
2 Connection for P&T relief valve R 1“ (on-site)
3 Expansion control valve ECV (if required)
4 Cold water supply R ¾“
5 Condensate drain ¾“ hose connection
6 Drain valve
7 Straight-through shut-off valve
8 Pressure gauge test connector*
9 Non-return valve*
10 Test valve connection*
11 Pressure reducing valve*
12 Straight-through shut-off valve
* optional
» Remove the protective caps from the connectors.
» With a sharp knife, cut a hole into the protective caps and invert
over the pipe to be connected.
» Connect the pipe and refit the protective caps.
!
Please note: To protect against the risk of corrosion,
make the connection as flat packing seal. The use of
hemp on connections is not acceptable.
Insulate the DHW line in accordance with local regulations.
Accurately maintain the order of fittings on the cold water side.
» Flush the line prior to installation.
» Install a drain valve at the lowest point of the cold water supply
line.
Install a pressure reduction valve when the water pressure is hig-
her than 0.5MPa (5bar). Special measures are required at a water
pressure in excess of 1MPa (10 bar) (see DIN 1988).
9.6.1 Expansion control valve
— The diameter of the connecting pipe must not be larger than
the safety valve diameter.
— Size the drain so that water can drain off, even if the safety
valve has been fully opened.
— The drain outlet must not be able to be closed and must al-
ways remain open to atmosphere.
— The safety valve must open at 475 kPa
9.6.2 P&T relief valve
Atsite: Install a P&T relief valve of company RMC , typ HT 575.
The P&T relief valve must open at 700 kPa.
!
CAUTION
To reduce the risk of excessive pressures and temperatures
in this appliance, install temperature and pressure protec-
tive equipment required by local codes and no less than a
combination temperature and pressure relief valve certified
by a nationally recognized testing laboratory that maintains
periodic inspection of production of listed equipment or ma-
terials, as meeting the requirements for Relief Valves and
Automatic Gas Shutoff Devices for Hot Water Supply Systems,
ANSI Z21.22.
This valve must be marked with a maximum set pressure
not to exceed the marked maximum working pressure of
the water heater. Install the valve into an opening provided
and marked for this purpose in the appliance, and orient it
or provide tubing so that any discharge from the valve exits
only within 6inches above, or at any distance below, the
structural floor, and does not contact any live electrical part.
The discharge opening must not be blocked or reduced in
size under any circumstances
9.6.3 Condensate drain
The appliance is designed so that, if it is installed externally, the
condensate can freely drain away. However, the condensate can
also (in case of internal installation) be routed into a drain in the
floor or into a wall drain connection located at a higher point.
If the condensate is to be routed through a higher wall outlet,
position the appliance on a plinth (see figure in chapter
“Positioning”), and route a suitable drain hose on site.
Note: Never kink the hose, to ensure the condensate
drains perfectly.
If required install a condensate pump (see chapter “Accessori-
es“).
For further information please contact your watersupplier or local
plumbing inspector!