Technical data

EM RANGE GAS FIRED
- 10 -
Combustion Chamber Internal Resistance
EM60 - EM88 0.4 mbar
EM117 - EM175 0.6 mbar
EM235 - EM301 0.9 mbar
EM375 0.6 mbar
EM440 0.9 mbar
EM525 - EM600 0.7 mbar
EM700 1.1 mbar
Warning
Special flue configurations such as those
featuring dilution systems and fan assisted flues
can only be used if they do not adversely effect
the combustion. The resistance figures detailed
in section 8 must therefore be adhered to.
Horizontal runs must be kept to an absolute
minimum, and wherever possible the flue should
rise vertically. If this is not possible 45
o
bends
should be used. If a horizontal run is necessary
it should be installed so as to rise by 5
o
and
should be followed by a vertical rise of at least
twice that of the horizontal run.
The flue must feature an approved terminal, and
the flue system should be effectively sealed.
The design and construction of the flue must
also take account for the provision of external
flue support for installations with long flue runs
.
Warning
Care should be taken when siting the AHU as
the flue temperature of the condensate tee may
be in excess of 350° C .
An optional flue guard is available as an
accessory
3,0 Installation
Note
It is strongly advised that the installer reads and
is familiar with Section 2 and Section 3 of this
manual prior to starting any installation work. It
is a requirement that only qualified and
competent personnel may undertake installation,
commissioning, and servicing.
Caution
Particular attention should be paid to the
ventilation requirements of small plant rooms
when installing AH units. The radiated heat
from the flue exit ducts may cause the burner
compartment ambient temperature to exceed the
60° C maximum operating temperature for the
burner if the compartment ventilation is
inadequate
3,1 Positioning and siting
It is advisable that when positioning the
appliance the lifting eyes are used, thereby
reducing the risk of inadvertent damage.
3,2 Flooring and support
The EM unit must be installed on a level non
combustible surface capable of supporting the
weight of the EM unit and any ancillary
equipment.
3,3 Minimum clearances
Sufficient clearance must be allowed to enable
installation, commissioning and servicing to be
carried out safely and effectively. The
manufacturer recommends that a clearance of at
least 1m at the front and the back of the EM unit
so as to allow burner servicing (on front panel)
and heat exchanger tube cleaning (on the back
panel).
3,4 Flue Installation
An integral condensate tee is fitted to all
Exchange Modules, thereby allowing the flue to
connect directly into the appliance. The design
of the flue must ensure that it can be
disconnected to allow for cleaning and
servicing, furthermore, all of the flue section
joint sockets must face upwards, and the seal
between the sections achieved through
mechanical joints or through the use of
approved caulking string and grout.
Where condensation is likely to be a problem
provision should be made, preferably at the
design stage. All EM units are fitted with a drain
point at the bottom of the condensate tee.
The manufacturer recommends that on units
fitted with high-low or modulating burners the
drain facility is connected so as to allow
condensates to drain freely.
3,5 Gas Installation
Warning
If a gas leak is suspected, all potential sources
of ignition must be extinguished, gas supply
cocks closed to isolate the leak, doors and
windows opened to allow the dissipation of
the gas to occur, and the gas supplier
informed immediately.
Never search for gas leaks with a naked
flame.
Pipe work and meters must be sized so as to take
into account the required dynamic volume for