CALEFFI BIOMASS OPTIMISER 1522 Series Manual de instalación y puesta en marcha - Página 9
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Program 6 (software code PR85)
Heating, instantaneous domestic hot water + management of inertial water storage in parallel on the
heating system.
Number of probes utilised: 4
Probe S1 located on solid fuel generator flow
Probe S3 (not supplied in the pack) located on domestic heat exchanger outlet
Probe S5 located on heat exchanger inlet on secondary side of circuit
Probe S4 located on the inertial water storage in parallel on the heating system
K
S1
SOLID FUEL
GENERATOR
Open vessel
K
S1
SOLID FUEL
GENERATOR
Closed vessel
P1 P2
C
Wiring diagram of F29525
relay box - 230 V ˜ 50 Hz
Relè 1 VA
8 VA
V5=Zone valve 6443..3BY
Operating principle
The 1522 series regulator automatically manages a system composed of a solid fuel generator, gas integration boiler (for heating and domestic
hot water), inertial water storage in parallel on the heating system and instantaneous domestic hot water production by means of a plate heat
exchanger.
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 system (in the
presence of room thermostat demand) or to an optional dissipation system, if present.
When a domestic user tap is opened, on a signal from flow switch F, the regulator operates priority valve V3 to produce instantaneous hot water
with the solid fuel generator only if the latter is already at working temperature. Probe S3 reads the water temperature at the domestic heat
exchanger outlet and, if necessary, the regulator integrates the domestic hot water by supplying it to the gas boiler by means of a diverter valve
(not supplied in the pack, e.g. SOLARINCAL kit code 265359).
The inertial water storage in parallel is managed in accordance with the logic described on page 6. By means of diverter valve V5 (not supplied
in the pack, e.g.: Caleffi 6443..3BY series + relay box code F29525) the regulator manages all phases of loading and unloading of the water
storage, which is kept closed only if the gas boiler has been activated. Connection of the parallel water storage to the rest of the system is
managed by the regulator by comparing the temperature readings of probes S1 (located on the solid fuel generator flow pipe), S5 (located on
the heat exchanger return line) and S4 (located on the parallel water storage). For probe S5 it is advisable to use the following working set-
points: 45°C for radiator systems, 30°C for radiant panel systems. The gas boiler starts when the solid fuel generator temperature is below the
minimum working temperature TSG (measured by probe S1) and the heat exchanger return temperature TR (measured by probe S5) is 5°C
below the value set on the regulator (TR set, fixed hysteresis value 5K).
S3
F
D
V3
D
P1
V1
S5
T
P2
C
SOLAR
V1
V3
K
V4
V5
INCAL
F29525
V5
D
V5
D
Optimiser
-
+
SOLARINCAL
D
M
Optional
Domestic
dissipator
water
system
HEATING
DHW
BOILER
F
S1
S5
S4
RT
S3
wiring to be made
9
RT
M
M
V4
D
D
V5
INERTIAL
WATER
STORAGE
IN PARALLEL
Heating
system
Wiring diagram
L Live
x2 Room thermostat
N Neutral
RT contact
L' Live jumper
x3 Room thermostat
RT contact
1 ON pump P1
x4 Probe S3 on domestic
2 ON pump P2
exchanger outlet
N Neutral common
x5 Probe S3 on domestic
3' Gas generator C
exchanger outlet
3 Gas generator C
y1 Probe S1
4 ON diverter valve V1
y2 Probe S1
5
ON diverter valve V3
NO
y4 Probe S5
for domestic priority
y5 Probe S5 and
5
ON diverter valve V3
NC
S4 common
to heating system
y6 Probe S4
6' Solid fuel generator K
y8 ON flow switch F
6 Solid fuel generator K
y9 ON flow switch F
N Neutral common
7 SOLARINCAL with flow
to user
8 SOLARINCAL with flow
to domestic integration
9 On diverter valve V4
10 ON valve V5 to load the
parallel water storage
ON
1 2 3 4
S4