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1.3. Maintenance
The heating unit is to be serviced in accordance to current laws and
regulations.
Proper maintenance allows the heating unit to operate efficiently,
environmentally friendly, and safely with regards to people, animals
and property.
The heating unit maintenance procedure is to be performed by qua-
lified personnel.
The user may only clean the outer casing of the heating unit, by
means of furniture cleaning products.
Do not use water!
1.4. Information for the user
The user can only access heating unit parts which are accessible
without the use of tools and/or utensils.
No-one, including qualified personnel, is authorized to implement
modifications to the heating unit.
The manufacturer shall not be held liable for injury to people and
animals, and damage to property resulting from tampering with or
improper intervention to the heating unit.
Should the heating unit be left inactive for a long period, and power
disconnected, it may be necessary to unlock the pumps.
This operation must be performed by a qualified service techni-
cian.
It order to prevent the pumps from locking, add special filming pro-
ducts to the water, suitable for multi-metal systems.
Frost protection can be ensured by adding a specific anti-freeze
product suitable for multi-metal systems.
Do not use automotive anti-freeze and check it regularly to verify
product efficacy.
The heating unit is equipped with a led thermometer on the control
panel (pic.1), for water temperature verification.
2. TECHNICAL FEATURES AND DIMENSIONS
2.1. Technical features
The heating unit has a cast iron heat exchanger with three flue gas
passes, and operates with an oil-fired blown-air burner; the following
models are available:
B
combination heating unit, serving one high temperature CH zone,
and equipped with a 130 liter DHW cylinder;
BV
combination heating unit, serving one high temperature CH zone
and one low temperature CH zone (via mixing valve), equipped with
a 130 liter DHW cylinder;
R
CH only heating unit, serving one high temperature CH zone;
RV
CH only heating unit, serving one high temperature CH zone and
one low temperature CH zone (via mixing valve);
All the above models are available in the following versions:
TF 23
: open chamber heating unit with 24 kW thermal output;
TF 33
: open chamber heating unit with 33 kW thermal output;
TF 43
: open chamber heating unit with 43 kW thermal output;
TFD 23
: sealed chamber heating unit with split air/flue gas system
and 24 kW thermal output;
TFD 33
: sealed chamber heating unit with split air/flue gas system
and 33 kW thermal output;
TFD 43
: sealed chamber heating unit with split air/flue gas system
and 43 kW thermal output.
Each heating unit meets the legal requirements in the country of de-
stination which is indicated on the rating plate.
Installation in a different country from the one indicated may be sour-
ce of injury and/or damage for people, animals and properties.
The heating unit main technical features are listed below.
Manufacturing features
- High-efficiency cast-iron heat exchanger with three flue gas
passes.
- Extra thick fiberglass insulation with aluminum Kraft (50 mm).
- Oil-fired blown air burner, sealed version, with built-in fuel oil pre-
heater.
- 130 liter DHW ceramic-glass lined cylinder, easy to inspect, with
high efficiency, oval shaped, coil exchanger, polyurethane
insulated, and magnesium sacrificial anode;
- Electro-zinc plated steel sheet casing, painted with
epoxy-polyester powder.
- Electronic control board managing the heating unit.
- 12 liter CH expansion vessel.
- 5 liter DHW expansion vessel (B and BV models).
- 3 bar CH safety valve.
- 7 bar DHW safety valve (B and BV models).
- Three-speed CH pump with integrated air purging device.
- DHW pump with integrated air purging device(B and BV
models).
- Additional air purging device on the exchanger.
- Digital programmable timer (optional equipment for B and R
models).
- In-line oil filter.
- Cylinder temperature probes.
- CH system loading tap.
- CH system unloading tap.
- Low water pressure switch.
- Safety thermostat (110°C).
- Designed to host an additional electronic board for different CH
zone management (standard on BV and RV models).
- Designed for connection to an Open Therm remote control
(optional kit).
- Designed for connection to an external temperature probe
(optional kit for B and R models, standard on BV and RV models).
User interface
- Master switch with light;
- selector managing: TIMER, COMFORT TEMPERATURE, NIGHT
TEMPERATURE, ANTI-FROST, SUMMER;
- CH water temperature adjusting knob (also allowing activation of
EXCHANGER TEMPERATURE MAINTENANCE function);
- DHW temperature adjusting knob in B and BV models (also
allowing activation/de-activation of cylinder);
- cylinder activation selector (R and RV models);
- thermometer with leds;
- pressure gauge;
- lights indicating:
. power ON;
. burner ON;
. CH function active;
. burner shutdown;
. overheating shutdown;
. low water pressure shutdown;
. shutdown due to malfunction of temperature probes;
. remote control connection fault;
Operational functions
- Anti-frost function;
- anti-legionella function;
- pump anti-locking function;
- pump post-circulation function;
- excessive heat management function.
