Solar Boiler kit
Solar-boiler thermostatic connection kit
The kit, fully assembled and tested, consists of:
INLET:
T-shaped central connection with adjustable angular position of the connections.
In some positions I’ll be necessary to remove the insulation box.
Minimum static pressure 10 bar (PN 10); dynamic 5 bar.
Maximum ratio between the pressures 2:1.
Inlet maximum temperature: constant temperature 100°C;
(short time temperature: 120°C for 20 s).
Temperature adjustment field: 30÷65°C. Accuracy ± 2°C.
External connections: 3/4” Male (swivel connection).
INLET:
- Thermostatic diverting valve 1” Male with fixed setting temperature at 48°C. Body made in DZR brass.
- Solar check valve and filter built in the connection pipe to the solar storage tank.
- T-shaped swivel connection to the boiler with storage tank.
- Anti-scald thermostatic mixing valve 1” Male. Body made in DZR brass. Control of the user temperature adjustable by means of a knob from 30°C up to 65°C.
- Solar check valve and filter built in the connection pipe to the cold water.
T-shaped central connection with adjustable angular position of the connections.
In some positions I’ll be necessary to remove the insulation box.
Minimum static pressure 10 bar (PN 10); dynamic 5 bar.
Maximum ratio between the pressures 2:1.
Inlet maximum temperature: constant temperature 100°C;
(short time temperature: 120°C for 20 s).
Temperature adjustment field: 30÷65°C. Accuracy ± 2°C.
External connections: 3/4” Male (swivel connection).
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Avalilable Kvs:
1.2 = Small water consumption; max. 35 l/min (3 bar)
1.7 = Middle water consumption; max. 49 l/min (3 bar)
1.2 = Small water consumption; max. 35 l/min (3 bar)
1.7 = Middle water consumption; max. 49 l/min (3 bar)
Scheme of a thermal solar system, gravity or forced circulation
NB: This schema is just as an indication |
(1) (2) (3) (4) |
Forced circulation solar collector ModvSol solar station Solar water tank Gravity solar collector with storage tank |
(5) (6) (7) |
Wall boiler, or standing boiler with built-in storage tank Solar Kit 1 Control thermometer |
Working
The solar kit for boiler allows to manage automatically and to exploit at its best the thermal energy delivered by a thermal solar system during any time of the year and to supply hot domestic water for end user, at a controlled temperature.
The kit, supplied in a suitable and smart EPP insulating box, works in two ways:
- In case temperature of water coming from solar storage tank, either a gravity or a forced loop with glycol, is high enough, for example in summer, the first device of the kit, a diverting valve, diverts fluids towards the mixing valve (see scheme 1). Then the mixing valve mixes the fluid with cold water from mains, up to presetted temperature.
- Whereas, as it happens in winter, temperature of water in solar water tank is low (less than 48°C; note: diverting valve is pre-setted on shop to divert from 48°C), diverting valve proportionally diverts pre-heated fluid towards the boiler storage tank. In this case the solar energy is full exploited and time-work for boiler to increase temperature is reduced to minimal, (see scheme 2). The anti-scald mixing valve checks and regulates the temperature of the water to the end user.
Scheme 1: working conditions with water temperature in solar storage tank higher than 48°C |
Scheme 2: working conditions with water temperature in solar storage tank lower than 48°C |
Diverting valve with fixed pre-setting; exit towards outlet 1 with temperature < 48°C; towards outlet 2 with temperature > 48°C. |
Solar check valve it is built-in in the 3/4” male fitting |
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Anti scald thermostatic mixing valve, adjustable from 30°C to 65°C; H inlet hot water from the brass fitting; C inlet cold water from mains; MIX exit mixed hot water towards end user. |
Filter it is built-in in the 3/4” male fitting |
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Most popular solar hydraulic schemes |
Natural circulation (gravity) |
Forced circulation (glycol / closed circuit) |
Forced circulation (glycol / closed circuit) and boiler integration |