INSTALLATION
This electric unvented storage water heater includes the basic
installation elements which are found in the packaging, i.e.:
- Insulating bushing for pipes.
- Safety valve.
Installation and first operation of the storage heater and the
fittings have to be done by an expert which can take the
responsibility for properly done work and explains the handling
procedures.
For the connection the specific technical conditions of the
energy supplier as well as the valid standards and safety
regulations have to be considered.
WALL MOUNTING PROCEDURE
Hot water6
Use 4 adequately resistant and sturdy screws and rawl-
Safety
plugs capable of holding the weight of the filled heater.1valve2Min. 20 mm air inlet
Cold water
50 cm3
LOCATION45
The installation procedure is greatly facilitated by the possibility
to locate the unit horizontally (EWH-SL/SLN and EWH-R/RN)
or vertically in a frost-free (!) place anywhere the house.
It would be a good idea to place the unit as close as possible
50 cm
to the outlet - short piping means little loss of temperature.
A minimum space of 50 cm below the outlet pipe is necessaryHot water6
for servicing.
As shown in the drawing the input and output pipes must be
6
on the left side when the heater is installed horizontally.
Should the unit be close to a wall leave the recommended
minimum-space for maintenance and service.21
Safety valve
Do not install the heater with its wall mounts against the floor
Cold water
nor on a horizontal plane.
Min. 20 mm air inlet345
HYDRAULIC INSTALLATION
1.Safety valve
The heater must be connected to the water supply mains.
2.Turning knob for cleaning and draining
a) The safety valve - supplied with the heater- MUST be3.Draining pipe for the safety valve
installed on the cold water input (see right side)4.Stop valve
5.Reducing valve - necessary when pressure is more than 5 bar-
- Before connecting the safety valve with the heater, theto be installed after the Ometer�
connecting pipe must be rinsed carefully.6.Earthed plastic sleeves (supplied with the heater)
- The draining pipe and the safety valve must be left open
to the air and be installed in a continuous downward slope.ELECTRIC INSTALLATION
Water expands when heated. The units of the series R,All storage water heaters of the EWH-series are of 220/230 V
eco R and SL are supplied with a safety valve that lets thesingle phase design. Before connecting make sure that the
expanding water flow back into the cold-water feed.mains supply and unit input features coincide.
The units of the series RN and SLN have a safety valveThe heaters installation procedure is totally straightforward
that prevents the expanding water (N=non return) fromand only requires that Low Voltage Electronic Regulations are
met. Although well known by the installers we would like to
flowing back into the cold-water feed. Here a suitable siphon
point out some of the basics:
for the absorption of the expanding water is to install.
OThe following volumes and provisions shall be taken into
The drain of the safety valve must not be blocked.
account for installations in bathrooms or toilets�.
To open the safety valve (not safety valve eco) to let thePROHIBITED VOLUME.- It is the volume limited by the
water flow from the heater - via the outlet - turn the knobtangential and vertical planes with respect to the outer edges
clockwise or counterclockwise as you please.of bathtub, toilet pan or shower enclosure and by a plane
situated 2,25 m above the same or the floor, should the units
The proper operating of the safety valve should be tested
be embedded in the same.
periodically that way:
- turn the knob clockwise or counterclockwise up to the top
position
- the water should flow out of the passage
- turn the knob to its down position
The pressure rating is indicated on the knob.
b) If the water-supply pressure exceeds 5 bar, a type-approved
reducing valve must be installed.Safety valveSafety valve ECOSafety valve |