CALEFFI BIOMASS OPTIMISER 1522 Series Installation And Commissioning Manual - Page 7

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CALEFFI BIOMASS OPTIMISER 1522 Series Installation And Commissioning Manual

Hydraulic diagrams of programs

Program 4 (software code PR83): BASIC FACTORY PROGRAM
Heating + management of inertial water storage in parallel on the heating system
Number of probes utilised: 3
Probe S1 located on solid fuel generator flow
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
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 and inertial water storage
in parallel on the heating system.
On the request of room thermostat RT (not supplied in the pack), the regulator activates the solid fuel generator with priority 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 system (in the
presence of room thermostat demand) or to an optional dissipation system, if present.
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).
Optimiser
P1
S5
T
P2
V5
V1
V4
K
F29525
V5
D
V5
D
Optional
-
+
dissipator
D
D
V1
C
HEATING
BOILER
S5
S4
S1
RT
wiring to be made
7
RT
M
V4
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 S4
2
ON pump P2
N
Neutral common
y6 Probe S4
3'
Gas generator C
3
Gas generator C
x2 Room thermostat
4
ON diverter valve V1
5
ON diverter valve V4
NO
x3 Room thermostat
to optional dissipator
5
NC
6'
Solid fuel generator K
6'
Solid fuel generator K
N
Neutral common
10 ON valve V5 to load the
parallel water storage
ON
1 2 3 4
M
S4
common
RT contact
RT contact