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OVERVIEW
• Combination boiler (central heating and domestic hot water).
•TANK-IN-TANK indirect storage type domestic hot water production.
• Equipment required: a hydraulic connection kit for the heating
circuit (available as an option).
• The control panel comprises an on/off switch, adjustable
thermostat, thermometer, Summer/Winter selector and knockout
for fitting the ACV integrated control system
(optional).
• The Delta Performance FV can be connected as a balanced flue
system with a type C concentric adapter…, or with a type B23
adapter directly to the chimney.
• The Delta Performance FV 35 with a fixed output of 35 is fitted
with the ACV BMV1 oil burner.
• The Delta Performance FV 50 with a fixed output of 50 is fitted
with the ACV BMV2 oil burner.
DESCRIPTION OF OPERATION
The "Tank-in-Tank" concept
The Delta Performance balanced flue series differs from traditional
hot water generators because of its ring-shaped tank immersed in
the primary fluid contained in the outer body. When there is a
demand for heat from the central heating system or the domestic hot
water system, the potentiometer starts the burner. The combustion
gases quickly heat up the primary fluid, creating a natural circulation
around the tank.
Domestic hot water heated indirectly
This circulation facilitates heat exchange between the primary fluid
and the domestic water, which takes place all over the tank surface.
The corrugations on the inner and outer shells of the ring-shaped
tank further boost the area of heat exchange and speed up the
heating process of the domestic water.
Easy setting with safety assured
With a single command, the water temperature of both the primary
circuit and the hot water circuit is set by the adjustable thermostat
situated under the tank in the primary circuit.
A cut-off thermostat, placed on top of the boiler, automatically cuts
out the burner when the water temperature in the primary circuit
reaches 95 °C. A manually reset safety thermostat shuts off the
burner if the temperature reaches 103 °C.
CONSTRUCTION FEATURES
Corps externe
The outer body containing the primary fluid is made of thick
STW 22 steel.
"Tank-in-Tank" type exchanger accumulator
The ring-shaped inner tank with its large heating surface for
producing domestic hot water is built of Chrome/Nickel 18/10
stainless steel. It is corrugated over its full height by an exclusive
production process and entirely argon arc welded by the TIG
(Tungsten Inert Gas) method.
Combustion gas circuit
The combustion gas circuit is protected by a high temperature
resistant paint. It is composed of:
•Flue pipes. Delta Performance balanced flue models have 8 steel
flue pipes with an internal diameter of 64 mm. Each pipe is fitted
with a special steel baffle designed to improve heat exchange and
reduce flue gas temperature.
• Combustion chamber. The sealed combustion chamber is water
cooled.
Insulation
The boiler body is fully insulated by rigid polyurethane foam with a
high thermal insulation coefficient, sprayed on without the use of
CFCs.
Jacket
The boiler is covered by a steel jacket which has been scoured and
phosphated before being stove enamelled at 220 °C.
BOILER CAPTIONS (see illustration K)
1. Control panel
2. Removable jacket top
3. Flue reduction collar
4. Measuring unit
5. CFC-free polyurethane foam insulation
6. Inner ring-shaped domestic hot water tank
7. Side panel
8. Base
9. Burner and burner chamber plate cover
10. Burner chamber plate
11. Control thermostat bulb
12. Removable front panel
13. Tube supplying air to venturi
14. Manual reset safety thermostat - 103 °C
15. Cut-off thermostat bulb - 95 °C
16. Balanced flue connection unit
17. Heating return
18. Domestic cold water inlet
19. Inner ring-shaped domestic hot water tank
20. Combustion chamber
21. Boiler drain
22. Lower heating return
23. Flue pipes
24. Turbulators
25. Domestic hot water outlet
26. Central heating flow pipe
DESCRIPTION
