CALEFFI BIOMASS OPTIMISER 1522 Series Manual de instalación y puesta en marcha - Página 8
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Program 5 (software code PR84)
Heating, domestic hot water with storage + 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 S2 (not supplied in the pack) located on domestic water storage
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
C
V1
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, integration gas boiler, inertial water storage in
parallel on the heating system and domestic hot water production by means of a water storage.
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 a solid fuel generator overtemperature, the regulator sends the flow rate of the secondary circuit either to the system (in the
presence of a room thermostat demand) or to the domestic water storage if it is not yet at
operating temperature or lower than the limit temperature. The domestic water storage is
maintained at operating temperature by probe S2 and priority diverter valve V2. The regulator
performs thermal disinfection of the domestic water storage in accordance with four
user-selectable preset programs, keeping it for two hours at the disinfection temperature
"Legio.-Temp", settable in the range 40–75°C. The user can anyway add further disinfection
periods (designated TP points in the menu).
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).
S2
P1
S5
T
V5
V2
K
F29525
V5
D
V5
D
DHW
Domestic
water
system
DCW
Optimiser
-
+
V2
D
D
V1
P2
C
HEATING
BOILER
S1
S5
S4
RT
S2
wiring to be made
D
8
RT
M
M
D
V5
INERTIAL
WATER
STORAGE
IN PARALLEL
Heating
system
Wiring diagram
L
Live
y1 Probe S1
N
Neutral
y2 Probe S1
L'
Live jumper
y4 Probe S5
1
ON pump P1
y5 Probe S5 and
2
ON pump P2
S4 common
N
Neutral common
y6
Probe S4
3'
Gas generator C
3
Gas generator C
x2 Room thermostat
4
ON diverter valve V1
RT contact
5
ON diverter valve V2
NO
x3 Room thermostat
for domestic priority
RT contact
5
NC
x4 Domestic water
Solid fuel
6'
storage probe S2
generator K
x5 Domestic water
6
Solid fuel
storage probe S2
generator K
N
Neutral common
10 ON valve V5 to load
the parallel water
storage
Disinfection
Program
day
0
No disinfection
1
Mon.
2
Sat.
3
Sun.
4
Mon. and Wed.
ON
1 2 3 4
S4
Disinfection
time slot
2-4
10-12
10-12
2-4