Installation instructions S-HR series page 4
1
Description of the unit
The STREBEL S-HR Boiler is a room sealed,
condensating and modulating central heating unit, with
or without an integrated hot water facility.
The built-in fan sucks the combustion air from outside
and provides full premixing of the gas and air. The gas
mixture is guided through the ceramic burner which is
fitted above the heat exchanger. As a result of the small
flame height a compact construction is possible. The
combustion gasses are exhausted after passing
through the stainless steel heat exchanger. The formed
condensation water is discharged through the waste
trap.
The unit has been tested according to valid CE*
standards and has a CE* certificate.
The operating efficiency of the unit is higher than 98%
(on top value). As a result of its compact construction the
radiation, convection and stand by losses are very low.
The emission of damaging substances is far below the
standard set for equipment with the gas quality-control
label for clean combustion.
The unit is provided with an automatic venting program.
In case of a recently topped up or filled up installation
this program takes care of the removal of any present
air. In this case the control will check the water pressure
and if it is too low, will report this on the display.
The unit anticipates the heat requirement of the central
heating installation or the hot water supply. As a result
the unit will adjust its capacity to the installation and will
switch on less often, which means that the unit will
operate longer and at a low level. It is possible that the
unit will only have to switch on once an hour. In this case
the aim is to obtain maximum comfort and efficiency.
In order to be able to anticipate installation noises the
unit has a so-called gradient control. After the unit goes
into operation this control provides a uniform increase of
power, instead of immediately burning at full power.
When the installation does require full power the control
will adjust as required. By this means a uniform increase
of the water temperature is effected.
If an outside sensor is connected, the control can
operate weather-dependent. This means that the
control measures the outside temperature and the flow
water temperature. On the basis of this data the control
calculates the optimal flow water temperature in the
installation.
The S-HR-T combination unit provides a hot water
supply by means of a high output calorifier fitted on the
right hand side of the unit. An adjustable thermostatic
mixing valve is fitted which provides a constant hot
water temperature (60
°
C factory setting).
2
Scope of the delivery
The unit is supplied ready for use. The supply kit is
composed as follows:
- Unit with casing;
- Automatic vent (inside the unit);
- Safety valve (inside the unit);
- Inlet combination and safety valve (only with S-HR-
T units);
- Suspension bracket
- Filling and draining valve with T-piece;
- Fixing material consisting of plugs and screws;
- Template on the package wrapper;
- Installation instructions
- Operating manual;
- Installation and user card.
3
Mounting of the unit
The unit can be mounted practically to every wall with
the mounting bracket and the included fixingequipment.
The wall must be flat and of sufficient strength in order
to be able to carry the unit weight.
Above the unit there must be at least 250 mm working
space in order to be able to fit a twin supply and exhaust
system or 500mm when fitting a horizontal coaxial flue
system. On the left side of the unit at least 50 mm and
on the right side 10 mm must be reserved in connection
with fitting or removing of the casing. The location of the
unit can be determined by using the template on the
inside of the wrapper.
