Nofer SB030N Manual Del Usuario Y Del Instalador página 9

Ver 4.0_ES_EN_FR_IT_PT_02/22
The building place must be chosen considering the maximum reduction of 90º elbows in water
connections and, at the same time, make easy the substitution of the heating element.
2.- APPLIANCE WALL HANG
Due to its particular design, the NOFER electrical water heaters could be installed in three positions as
you could see at fig-2:
1. Vertical. At this position cold water inlet pipe (F) is on the right side and hot water outlet pipe (C) on the
left side.
2. Horizontal right and left wall. In this case inlet cold water pipe (F) will be placed every time in the bottom
pipe and hot water outlet pipe (C) in the upper part.
Independently from the chosen installation, the hydraulic safety valve supplied with the appliance must be
installed at the inlet cold water pipe (F). In every case the distance between water heater maintenance cover and
the closer wall must be minimum 60 cm.
3.- CONNECTION TO THE WATER SUPPLY.
The water heater may be connected to a closed-circuit pressure system which enables several points of
use. For safety reasons the supply pipe must be fitted with a return safety valve or alternatively, a valve of the
safety class that prevents the pressure in the tank from exceeding the nominal pressure by more than 0.1 MPa.
The heating of water in the heater causes the pressure in the tank to increase to the level set by the safety valve.
As the water cannot return to the water supply system, this can result in the dripping from the outlet of the safety
valve. The drip can be piped to the drain by installing a catching unit just below the safety valve. The drain
installed below the safety valve outlet must be piped down vertically and located in the environment that is free
from the onset of freezing conditions. In case the existing plumbing does not enable you to pipe the dripping
water from the return safety valve into the drain, you can avoid the dripping by installing a 3-litre expansion tank
on the inlet water pipe of the boiler. You should ensure that the return safety valve is functioning properly by
checking it on a regular basis i.e. every 14 days. To check the valve, you should open the outlet of the return
safety valve by turning the. The valve is operating properly if the water comes out of the nozzle when the outlet is
open.
fig 2.- Models NOFER SBxxxN/SB075S
C
Fig-3 Hydraulic installation
9
F