CALEFFI BIOMASS OPTIMISER 1522 Series Manual de instalação e colocação em funcionamento - Página 10
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Program 7 (software code PR86)
Heating with direct inertial water storage with tank-in-tank domestic hot water production, solar system
Number of probes utilised: 3
Probe S1 located on solid fuel generator flow
Probe Sol1 (not supplied in the pack) located on the solar collector
Probe Sol2 located on the tank-in-tank water storage
SOLID FUEL
GENERATOR
Open vessel
SOLID FUEL
GENERATOR
Closed vessel
wiring to be made
Operating principle
The 1522 series regulator automatically manages a system composed of a solid fuel generator, integration gas boiler and tank-in-tank direct
inertial water storage combined with a solar system.
On the request of the adjustment thermostat TR (not supplied in the pack) located on the water storage, the regulator activates the solid fuel
generator using contact K (for generators that can be activated electrically).
When the minimum working temperature of the solid fuel generator has been reached (as detected by probe S1), the regulator starts pump P1,
diverts valve V1 to connect the heat exchanger to the system and starts pump P2. With the solid fuel generator off or not yet at working
temperature, the regulator starts the integration boiler by means of contact C, stopping pumps P1 and P2 and diverting diverter valve V1 to the
boiler.
In the case of solid fuel generator overtemperature, the regulator sends the flow rate of the secondary circuit either to the water storage (in the
presence of a demand from adjustment thermostat TR) or to an optional dissipation system, if present.
The regulator allows to manage a simple solar thermal circuit connected to the lower coil of the tank-in-tank inertial water storage.
When the minimum working temperature of the solar collector is reached, temperature difference ΔT is checked between probe Sol1 on the
solar collector and probe Sol2 on the lower section of the tank-in-tank water storage: if higher than the set value, solar circuit pump Psol is
started. Pump Psol continues to run for a selectable minimum time period and it stops if ΔT falls below the set value or when the set temperature
for the tank-in-tank inertial water storage is reached.
The regulator manages possible overtemperatures of the solar collector by starting pump Psol to dissipate the excess heat.
Psol
Optional
dissipator
HEATING
BOILER
Psol
Sol 2
Sol 1
1
Sol 1
S
Sol 2
DIRECT
TANK IN TANK
INERTIAL WATER STORAGE
Wiring diagram
L
Live
y1 Probe S1
N
Neutral
y2 Probe S1
L'
Live jumper
y5 Solar water storage
1
ON pump P1
probe Sol2
2
ON pump P2
y6 Solar water storage
N
Neutral common
probe Sol2
3'
Gas generator C
y7 Solar collector
3
Gas generator C
probe Sol1
4
ON diverter valve V1
y8 Solar collector
5
ON diverter valve V4
probe Sol1
NO
to optional dissipator
5
x2 Adjustable thermostat
NC
6'
Solid fuel generator K
TR contact
6
Solid fuel generator K
x3 Adjustable thermostat
N
Neutral common
TR contact
10 ON solar circuit pump Psol
ON
1 2 3 4
Heating system