Gas-Fi Red Condensing Boiler (Only With R-410A) - Carrier 50FF 020 Installation, Operation And Maintenance Instructions

12 - FACTORY OPTIONS AND ACCESSORIES
- Pour more water into the circuit and repeat the previous steps.
- Activate the water pump (to be foreseen by the installer,
except with the "Very low outdoor temperature" option) and
repeat the previous steps until no air noises are heard in the
piping, which is when the fi lling of the installation will have
been fi nished successfully.
■ In case of long unit stops, and forcibly if they happen in the
winter season, the coil must be emptied.
■ To prevent the water from freezing, with this option the unit
always has an anti-freezing thermostat. Add glycol to the water
if necessary.
■ The direction of the water fl ow
must be correct and so the
following indications must be
observed:
Note: the hot water coil is not compatible with the droplet
eliminator after the indoor coil, the heat recovery coil or the active
dehumidifi cation.
12.13 - Gas-fi red condensing boiler (only with
R-410A)
Natural or propane gas boiler with modulating actuator, in
accordance with the Gas Directive 2009/142/EC, connected to
one side of the unit.
EC certifi cation: 0085CP0214.
Note: the gas boiler is not compatible with the droplet eliminator
after the indoor coil, the heat recovery coil or the active
dehumidifi cation.
■ Up to 3 values of total power available for each model:
50FF/FC BBF (Low)
020 to 047 unavailable
052 to 093 unavailable
Important: The staff responsible for the installation, operation
and maintenance of this burner must always strictly follow the
instructions given in this manual, as well as in the manufacturer's
(RIELLO) installation and maintenance brochure for the boilers
in the CONDEXA series, supplied with the unit.
Characteristics of gas boiler
■ The key features of the boiler are:
- Burner with premixing and modulation technology that allows
outputs close to 109% (Hi performance).
- Heat exchanger made of stainless steel with a low carbon
content.
- Proportional air / gas valve. Low NOx emissions (class 5,
according to standard EN 297).
HOT WATER COIL HOT WATER COIL
BATTERIE D'APPOINT BATTERIE D'APPOINT
BATERÍA DE APOYO BATERÍA DE APOYO
BBM (Nominal) BBS (High)
unavailable Condexa PRO 70
Condexa PRO 70 Condexa PRO 100
- Condensate drain with siphon.
- Forced draught.
- Electronic ignition.
- Safety devices: safety thermostat, low water pressure safety
switch, flowmeter, Delta-T control, smoke temperature
sensor.
- NTC sensor for boiler water temperature regulation.
- Working temperature of water from -7ºC to 100ºC. Consult
for percentages of glycol water above 20%.
- Electronic controller with microprocessor and Multifunction
LCD display for boiler's control, confi guration and diagnostics.
Possibility of ModBus communication.
- The electronic control of the unit will only manage the boiler
connection as heating support depending on the ambient
conditions.
■ The boiler is connected to the hydraulic circuit of the auxiliary
hot water coil (consult paragraph 12.12).
This water circuit, installed inside the unit, is composed of:
- Water coil.
- Circulation pump.
- Expansion vessel.
- Gate valves.
- Safety valve with a
tare value of 4 bar.
- A u t o m a t i c a i r
bleeder valve.
Safety instructions
Safety instructions to be followed by the staff responsible for work
with this burner are described below.
■ General cautions
Check the condition of the equipment upon delivery. Check
that the details on the label, the packing and the name plate
match the order. If equipment has been damaged, or there is
a shortfall in delivery, notify accordingly.
During the installation, operation and maintenance of the boiler
described in this manual, the use must always strictly follow
the instructions given in all the chapters of this manual, and in
the manufacturer manual provided with this unit.
The boiler must be installed in compliance with current
regulations, according the manufacturer's instructions and by
qualifi ed staff , technically specialised in the heating fi eld.
This thermal module must be used only for the applications it
was designed for. Any other wrong or unreasonable use must
be regarded as improper and therefore hazardous.
In the event of a water leak, disconnect the thermal module from
the main power supply, shut off the water supply and promptly
notify the Technical Assistance Service, or professionally
qualifi ed personnel.
Periodically check that operating pressure in the water circuit is
over 1 bar but below the maximum limit specifi ed for the boiler.
If this is not the case, contact Technical Assistance Service or
a professionally qualifi ed heating engineer.
The following operations shall be necessary if the boiler is not
used for a long period of time:
- Switch the boiler OFF at the control panel.
- Turn the magnetothermic switch "off ", placed in the electrical
cabinet of the 50FF/FC unit.
- Close the fuel cock and heating circuit water cock.
- Drain the central heating circuit if there is any risk of freezing.
Maintenance must be performed on the boiler at least once
a year.
49