Embassy ONEX, Installation And Maintenance Instructions Manual

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13
4.1 - Intended use
and functions of
the boiler
This gas-fired condensing boiler, is
designed to be used for central heating
and producing domestic hot water.
The maximum output heat is always
guaranteed for the production of
domestic hot water since it is given
priority over space heating demands.
Follow the specific procedure in
section 12.1 for the adjustment of the
domestic hot water temperature.
Depending on the model choosen, the
following system types can be created:
- 45WN. Using this boiler model, a
system can be created for the
production of instantaneous domestic
hot water and a heating system with
heating elements functioning at
temperatures ranging between 68
° F
(20 ° C) and 189 ° F (87 ° C).
The boiler can also function directly
with a radiant floor panel, see section
5.9.
When connecting the boiler to the
heating system the installer must
consider the head loss of the heating
system to verify that the boiler pump is
adequate. Pump curve is shown in
figure 5. The same verification need to
be done for the domestic installation,
see figure 7.
- 45AN. Using this boiler model, a
heating system with heating elements
functioning at temperatures ranging
between 68
° F (20 ° C) and 187 ° F (87 ° C)
can be configured.
The boiler can also function directly
with a radiant floor panel, see section
5.9.
The 45AN model is not equipped with
the components required for the
production of domestic hot water. Also
not included is the expansion tank and
circulator pump, see figure 3.
To connect the boiler to the heating
system, the installer must consider the
loss of pressure generated by the
boiler (see figure 6), and choose a
pump capable of overcoming the head
loss of both the boiler and the heating
system.
4 - FUNCTION OVERVIEW
- 45WE. This boiler is equal to the
45WN model, but is intended for
outdoor installation.
- 45AE. This boiler is equal to the
45AN model, but is intended for
outdoor installation.
All models can be connected to an
indirect storage tank for the production
of domestic hot water, section 7.
All models can be connected to a
room thermostat, section 6.3 and 6.4.
Because boiler models 45WE and
45AE are usually installed outside the
building, they need to be connected to
a Remote Command, section 6.8.
An outdoor air temperature sensor can
also be connected to the boiler for
maximum fuel efficiency and comfort
(see section 6.5). In this configuration
the room thermostat will compensate
by adjusting the room temperature.
The room temperature compensation
can be of an ON /OFF type or two-
stage. For further information on the
Climatic heat adjustment, refer to
section 12.4.
The boiler must be connected to a
heating system and a domestic hot
water supply with compatible
specifications, performance and
power rating.
Before installation, thoroughly flush
the heating and plumbing systems
of any residue or impurities which
might compromise the smooth
running of the boiler.
Only boilers model 45WE and
45AE are designed for outdoor
installation. However also for these
boilers you need to choose a
sheltered place where it is
protected from atmospheric
elements including frost.
Refer to figure 8 for minimum
clearance distances for installation
and future maintenance.
Refer to section 5.2 for minimum
clearance distances from
combustible material.
4.2 - Setting of the
boiler
Inside this instruction manual there are
sections that require you to change the
settings of the boiler. To do this, the
installer needs to operate on several
available menus, which are explained
within the section the change is
needed.
To aid the installer, all menus are also
shown in section 16 with an
explanation of which varies keys to
press.