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Solutions for centralized heating systems installations
Technical specications
Dimensions
Diagrams
Burner-exchanger unit
Wiring diagramWiring diagram for connection to an heating system
DHW circuit electric pump connections
Flue pipes (B23)
Dual ue system 45-65 kW
Dual ue system 85-150 kW
Electronics
Programming, setting and digital control
Single installationSchemes for single installation
Cascade installation
Schemes for cascade installation
Hydraulic separators and condensate neutralizer kit
Other accessories
Power HT 45 - 150 kWP.
136
137
138
139
140142
143
144
145
146
147
148
150153
158
164
168
169
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1.450 1.650 1.850 1.1000 1.1200 1.1500
Maximum heating heat input kW 46,4 67 87,2 102,7 123,2 154
Maximum heating heat output 80/60C kW 45 65 85 100 120 150
Maximum heating heat output 50/30C kW 48,7 70,3 91,6 107,8 129,7 162
Minimum heat output 80/60C kW 11,8 13,4 32,2 35,8 39 40,4
Minimum heat output 50/30C kW 12,8 14,5 34,9 38,8 42,1 43,7
Energetic efciency (Dir CE/92/42)
Average efciency (DIN 4702-T8) % 109,8 109,8 109,8 109,8 109,8 109,8
Nominal efciency 80/60C % 97,3 97,3 97,5 97,4 97,4 97,4
Nominal efciency 50/30C % 105,2 105,3 105,1 105 105,3 105,2
Efciency at 30% % 107,6 107,6 107,3 107,4 107,5 107,2
Load losses water side T=20k kPa 25 20 23,54 22,56 22,56 19,61
Minimum ow on the exchanger lt/sec 0,27 0,33 0,52 0,58 0,72 0,91
NOx class (EN 483) 5 5 5 5 5 5
Minimum working temperature C -5 -5 -5 -5 -5 -5
Heating system max pressure bar 4 4 4 4 4 4
Safety valve intervention pressure bar 3 3 3 3 3 3
Regulation of water temperature
in heating circuitC 25/80 25/80 25/80 25/80 25/80 25/80
Primary circuit water ow (T=20C) l/h 1.935 2.795 3.700 4.300 5.200 6.500
Water content lt 5,1 6,5 13,7 21 23,3 25,3
Quantity of condensing lt/h 5,1 7,3 9,6 11,5 13,5 16,9
Flue pipe mm 80 80 100 100 100 100
Flue ducts max length m 30 20 20 20 20 20
Maximum ue mass ow rate kg/s 0,022 0,031 0,041 0,049 0,059 0,073
Minimum ue mass ow rate kg/s 0,006 0,007 0,016 0,018 0,019 0,02
Maximum ue temperature C 72 73 78 80 77 75
Residual ue prevalence Pa 130 120 135 150 115 90
Comburent air-ow at Qn kg/sec 0,022 0,034 0,045 0,055 0,065 0,080
Dimensions (h x w x d) mm 850x450x621 850x450x693 850x450x801 850x450x871 850x450x1024 850x450x1132
Net weight kg 60 68 75 83 95 103
Gas type Natural Gas/CPG Natural Gas/CPG Natural Gas/CPG Natural Gas/CPG Natural Gas/CPG Natural Gas/CPG
Power consumption W 90 110 100 160 135 235
Power consumption in stand-by way W 6,3 6,3 6,3 6,3 6,3 6,3
Power HT 45-150 kWPower HT is the range of high efciency oor standing condensing boilers, heating only with
an output from 45 to 150 kW (80/60C)
The range of boilers is distinguished by high efciency, easiness of use/and installation and a
wide range of accessories for single and cascade installations.
The main element of these condensing boilers is the heat exchanger that has a combustion
chamber and a stainless steel AISI 316L coils hydraulic circuit .
The reduced quantity of water in the exchanger allows a small heat inactivity and so a quick
answer to the changes in the heat needed by the system.
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Solutions for centralized heating systems installations
DimensionsPower HT
RVA placement
Depth (A) mm
45cm
45cm/2cm
45cm/2cm
The stainless steel surfaces protect the exchanger from corrosion due to the condensation.
The regulation of the various elements of the generator is given to the digital PCB with double micro-processor that allows
a simple and reliable managing of the boiler through a control panel with wide LCD display. It is possible to set heating and
DHW mode daily or weekly, the climatic regulation according to the comfort requirements of the end-user; faults and possibleanomalies are shown.
The electronics of the boiler allow the technician an easy access to regulation parameters to set the boiler in order to optimize
the performances according to the type of installation.
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FLOW RATE/HEAD CURVE
HEAD
(mH
20)
FLOW RATE (l/h)
EXCHANGER PRESSURE DROPPOWER HT 1.850-1.1000
Exchangerpressuredrop(mH
20)
FLOW RATE l/h
2000
5,5
5,0
4,5
4,0
3,5
3,0
2,5
2,0
1,5
1,0
0,5
3000 4000 5000 6000
85 kW
100 kW
EXCHANGER PRESSURE DROPPOWER HT 1.1200-1.1500
Exchangerpressuredrop(mH
20)
FLOW RATE l/h
112-120 kW
150 kW
30 35 40
Efficiencyoftheboiler%
Return temperature of the system C
EFFICIENCY OF THE BOILER ACCORDING TO THE RETURN TEMPERATURE
30% load100% load
45 50 55 60979899
100101102103104105106107108
30 35 40 45 50 55 60303540
45505560657075
100% load
30% load
Fluestemperature%
Return tem erature of the s stem C
FLUES TEMPERATURE ACCORDING TO THE RETURN TEMPERATURE
EXCHANGER PRESSURE DROP
POWER HT 1.450-1.650
Exchangerpressuredrop(mH
20)
FLOW RATE l/h
45 kW
65 kW
Diagrams
The here below graphics, besides better dening the plan of the heating system, allow to deeply analyze the behaviour of thegenerator in different use conditions.
The load loss of the exchangersdenes the difference of pressure, in mm of water column, between the ow and return
connections of the generator. The fow rate/ head curveexplains the dynamic features of the BAXI circulator used as accessory
in these boilers. The performance curvepresents the changing in the efciency, as ratio between the output and input of the
condensing boiler , according to the return temperature of the boiler.
Finally the last graphic explains the uetemperature trendsof the boiler according to the return temperature.
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Solutions for centralized heating systems installations
Burner-exchanger unit
The pre mixing air-gas unit, the burner and the primary exchanger are the components that allow these condensing boilers tooffer high performances.
The pre mixing unit is made of the Venturi pipe in the fan inlet and of the mixer that grant constantly to the burner an optimal
air-gas ratio independently from the number of turns of the fan limiting to the minimum the consumptions and ensuring always
the correct combustion (that means reduction of the pollutant emissions).
The stainless steel burner, through the internal spreader and the special micro-perforation of the cylindrical surface, grants a
uniform spread of the air-gas mixture independently from his length.
The primary exchanger, totally made of stainless steel, is built with two cylindrical ue chambers, vertically positioned (burner
chamber and condensation chamber). Inside the cylindrical surface there are stainless steel coils, in which run the water of the
primary circuit. In the upper chamber the warm ues discharge gives heat to the return water of the system, contained in the
coils, provoking the condensation of the ues themselves and giving latent heat to the water, pre-heating it before it enters the
chamber of the burner.
Power HT 85-100
Power HT 120-150
Power HT 45-65
Flue outlet
Flue outlet
Flue outlet
PrimaryexchangerPrimary
exchanger
Primary
exchanger
Condensationchamber
Condensationchamber
Condensationchamber
Chamber ofthe burner
Chamber ofthe burner
Chamber ofthe burner
Coils
fan
fan
fan
Coils
Coils
venturi-mixerunit
venturi+mixerunit
venturi-mixerunit
Burner
Burner
Burner
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Wiring diagram
IX1-01
I
X1-02
I
X2-02
IX2-03
IX2-04IX2-
05I
I
X3-01
IX3-02
IX3-03
IX3-
04I
IX2-01I
X40
X30
X50
IX10-01IX1
0-02
I
X10-03I
X10-04
IX10-05
IX10-06
I
X11
X12
X13
X14
X15
1
2
1
2
1
2
1
2
3
1
1
2
1
2
1
2
1
1
2
3
1
2
12
10
98
76543
2
1
11
6
5
432
1
5
43
2
1
4
32
1
3
2
1
1
2
1
2
1
2
1
2
1
2
1
2
4
5
2
1
N L
N L
ab
ab
MAININPUT
FUSE
MAINSPOWER230V-50Hz
MAINSPOWER
TERMINALBOARD
DOMESTICHOTWATER
THANKSENSOR
g
g
COM
NOgg
LN
IGNITION
ELECTRODE
REMOTECONTROLLER
CONNECTION
ROOMTHERMO
STAT
SAFETYSHUT-D
OWN
OUTDOORSEN
SOR
SAFETY
THERMOSTAT
FLAMESENSING
ELECTRODE
12 34 56 78 910
PROGRAMMABLE
OUTPUT230V
INTERFACEBUS
FORBOILERS
IN
CASCADE
CLIP-INMO
DULE
TOCONTRO
LTHE
MIXINGZ
ONE
DISPLAY
CENTRALHEATING
SYSTEMPUMP
CONNECTIONPOINTS
17
16
15
14
13
12
11
FUMES
THERMOSTAT
NTCDELIVERY
HEATINGSENSOR
NTCRETURN
HEATINGSENSOR
IGNTER
HYDRAULIC
PRESSURE
SENSOR
DOMESTICHOT
WATERPUMP
CONNECTIONPOINTS
FAN
b
brbk
br
br
b
br
br
b
b
y/g
b
brb
br
b
b
b
bbr
b
bb
kbkr
r
g
gbrbr
b
y/g
bk
br
bbr
b
br
br
br
b
b
C
M
GASVALVE
V1V2
INOUT
MIN
rr
nn
y/g
y/g y
/g
y/g
G/V
Power HT 1.450 - 1.650 - 1.850 - 1.1000The picture explains the wiring diagram of the PCB of the boiler. Sensors and functional components of the generator are
controlled by the PCB to which they are connected through the internal connectors shown in the picture.
Other 3 connectors reachable from outside the PCB are available to check service devices and regulation of the system (pumps,
outdoor sensor, room thermostat etc) .
Colourofthe
cables:
C=
lightblue
M=
brown
N=
black
R=
red
G/V=
yellow/green
B=
white
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Solutions for centralized heating systems installations
Wiring diagram
IX1-01
I
X1-02
I
X2-02
IX2-03
IX2-04IX2-05I
IX3-01
IX3-02
IX3
-03
IX3-04I
IX2-01I
X40
X30
X50
IX10-01I
X10-02IX10-03IX10-04IX10-05IX10-06
I
X11
X12
X13
X14
X15
1
2
1
2
1
2
1
2
3
1
1
2
1
2
12
1
1
2
3
1
2
12
109876543
21
11
6
5432
1
5
432
1
4
32
1
3
2
1
1
2
1
2
1
2
1
2
1
2
1
2
IGNITION
ELECTRODE
4
5
2
1N
L
N L
ab
ab
MAININPUT
FUSE
230V-50Hz
br
-brow
n
bk
-black
b
-blue
r
-red
g
-green
g/y-gree
n/yellow
w
-white
DOMESTICHOTWATER
TANKSENSOR
g
g
ggg
y/g
COM
NO
g
gg
LN
MG/V
C
REMOTECONTROLLER
CONNECTION
ROOMTHERMOSTAT
SAFETYSHUT-DOWN
CENTRALHEATING
TEMPERATURESENSOR
OUTSIDESENSOR
SAFETY
THERMOSTAT
FLAMESENSING
ELECTRODE
SPARK
GENERATOR
12 34 56 78 910
PROGRAMMABLE
OUTPUT
INTERFACEBUS
FORBO
ILERSIN
CASCADE
CLIP-INMODULE
TOCONTROLTHE
MIXINGZONE
DISPLAY
17
16
15
14
13
12
11
WATER
PRESSOSTAT
20
19
18
FUMES
THERMOSTAT
FAN
b
brbk
br
br
b
br
br
b
b
y/g
b
brb
br
b
b
bb
br
b
b
bkbkr
r
g
gbrbr
rr
b
y/g
bk
br
bbr
PS
b
br
br
br
b
b
GASVA
LVE2
C
M
GASVALVE1
OUT IN
PILOT
AIRIN
OUT IN
PILOT
AIRIN
y/g
y/g y
/g
y/g
G/V
CENTRALHEATING
SYSTEMPUMP
CONNECTIONPOINTS
DOMESTICHOT
WATERPUMP
CONNECTIONPOINTS
Power HT 1.1200 - 1.500
Colourofthec
ables:
C=
lightblu
e
M=
brown
N=
black
R=
red
G/V=
yellow/green
B=
white
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High output oor standing boilers can be easily connected to a heating system through the use of terminal boards which areinside the dashboard. The connections with scheme and indications are shown in the picture below. The pumps of the heating
system (P1 and P2) have to be fed following the scheme of the picture interposing between the PCB of the boiler and the pumps
some relays.
It is not necessary to interpose a relay if, to the PCB is wired a single pump.
Wiring diagram for connection to an heating system
P1 = Pump of the hydraulic separator
P2 = Heating system pump
SI = Hydraulic separator (available as accessory)
UR = Heating Unit
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Solutions for centralized heating systems installations
DHW circuit electric pump connections
The connection of BAXI POWER HT boilers to an indirect cylinder for DHW production can be easily made respecting theconnections indicated in the here below picture.
The pump of the sanitary circuit P3, serving an indirect cylinder, must be linked on the Terminal board M3 of the boiler to the
terminals 13-14. Connecting the pump of the sanitary circuit P3 after an hydraulic separator (as explained in the drawing)
Link the NTC sensor of sanitary priority, supplied as accessory, to the 9-10 terminals of the terminal board M2 after having
removed the actual power resistance.
The sensible element of the NTC sensor has to be put in the relevant well foreseen on the cylinder (see drawing)
The regulation of the DHW temperature and the choice of the sanitary hourly programming can be made directly on the control
panel of the boiler.
DHW TANK CONNECTION DIAGRAM
UB - DHW STORAGE TANKM2 - TERMINAL BOARDSB - DHW PRIORITY SENSORRE - RESISTOR TO BE REMOVED
MR - CENTRAL HEATING FLOWRR - CENTRAL HEATING/DHW RETURNMB - DHW STORAGE TANK FLOWRB - DHW STORAGE TANK RETURNP1 - CENTRAL HEATING PUMPP3 - DHW STORAGE TANK PUMPTS - SAFETY THERMOSTATPS - SAFETY PRESSURE SWITCH
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Flue pipes
Power HT, open ue range of boilers, are certied for a B23 type of installation. This means that the boiler has to be connectedto a chimney through a stainless steel or plastic pipe with an internal diameter of 80 mm (Power HT 1.450 and Power HT 1.650)
or internal diameter 100 mm (Power HT 1.850-1.1000-1.1200-1.1500). There are available accessories in smooth PP with a
80 mm and 110 mm diameter. To use 110 mm ue accessories made of PP it is necessary to use an adaptor 100/110 available,
as well, as optional.
Important: the horizontal stretches must have a slope towards the boiler of 3.
Chart of the available pressures of the ue pipes
Cascade installation
ModelP available with
Flue pipe B23 100P available with
Single clapet 110/110P available with
Double clapet 110/110
HT 1.450 150 110 (with Clapet 80/110) -
HT 1.650 150 100 (with Clapet 80/110) -HT 1.850 110 110 -
HT 1.1000 150 110 -
HT 1.1200 170 - 80
HT 1.1500 280 - 120
Model Max length of the ue pipe-L- (m)For each 90 bend installed the length
decreases of (m)For each 45 bend installed the length
decreases of (m)
HT 1.450 30 1 0,5
HT 1.650 20 1 0,5HT 1.850 20 1 0,5
HT 1.1000 20 1 0,5
HT 1.1200 20 1 0,5
HT 1.1500 20 1 0,5
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Solutions for centralized heating systems installations
Dual ue system accessories
Picture Description Code
C53 conversion kit Power HT 45-65 kW LSB 710000100
PP pipe extension 80 L=1000 mm KHG 714059411 .
PP pipe extension 80 L=500 mm KHG 714059910 .
PP pipe extension 80 L=250 mm 710718301 .
PP 90 bend 80 KHG 714059211 .
PP 45 bend 80 KHG 714059311 .
Pipe 80 centring kit (pack of 5) KHG 714037411 .
Clamp centring kit 80 KHG 714106110 .
Pipe 80 supporting bracket (pack of 5) KHG 714037310 .
Internal sealing collar 80 KHG 714018510 .
External sealing collar 80 KHG 714018411 .
Flue terminal 80 LSD 790000150 .
Dual ue terminal 80 KHG 714010410 .
45-65 kW
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Flexible ducting system accessories
Picture Description Code
PP exible pipe 80 L= 1,5 m KHG 714105710 .
PP exible pipe 80 L= 20 m KHG 714105810 .
PP tee-joint 80 with supporting bracket andcondensate drainings
KHG 714105910 .
PP 90 bend 80 with supporting bracket (packof 3)
KHG 714106010 .
Flexible centring kit 80 (pack of 3) KHG 714106210 .
Triple lips gaskets kit 80 (pack of 5) KHG 714111210 .
Dual ue system accessories85-150 kW
Picture Description Code
C53 convension kit Power HT 85-100 kW LSB 710000110
C53 convension kit Power HT 125-150 kW LSB 710000120
PP pipe extension 110 L=1000 mm KUG 714133210 .
PP pipe extension 110 L=500 mm KUG 714133110 .
PP pipe extension 110 L=250 mm 710718501 .
PP reduction kit from 110 to 100 KHW 714096910 .
PP 90 bend 110 KUG 714133010 .
PP 45 bend 110 KUG 714132910 .
45-65 kW
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Solutions for centralized heating systems installations
Electronics
Settingheatingmode
Information:-DHW temperature-Outside temperature(if connected to theoutdoor sensor)
DHWON-OFF
DHW temperatureregulation
Reset
Programmesaccessand shift
Programmesaccess
and shift
Parametersregulation(decrease value)
Parametersregulation(increase value)
Heatingtemperatureregulation
Power HT range of boilers is provided with a wide digital control panel: dedicated push-buttons for each single function and LCDdisplay combining symbols and codes for information about the boiler working status allowing an easy reading and an immediate
parameter control, programming and setting.
Microprocessor with double CPU: a new technology software for the boiler optimal operation
Built-in daily timer to program both central heating and DHW functions
Programmable pre-heating function of the DHW circuit to reduce waiting times
Digital electronic thermometer
Self-check: detection and description of any possible fault
Built-in climatic regulation (outdoor sensor supplied as optional)
Automatic summer/winter switch with outdoor sensor connected
Cascade system installation option Mixing systems (high and low temperature) installations option
Interface PCB, available as optional, connectable for supplementary functions such as remote control of fault/operation
signals, control of additional pumps, control of boiler output by an external electronic device, etc.
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Programming, setting and digital control
Picture Model Description Code
Boiler interface for mixing
systems with two different
temperatures zones
Through this accessory the boiler is able tomanage a mixing system with a high and a lowtemperature zone. The accessory managesdirectly the components of the low temperaturecircuit as the mixing valve, the circulating pumpand the NTC sensor, to measure the temperatureof this circuit.
KHG 714077913 .
Boiler control interface 0-10 V
Through this accessory the boiler is able to
change the heat output according to a voltagesignal (010V) coming from a programmablecontroller (PLC) out of the boiler. Then, it ispossible to connect the outdoor lamps to showthe block of the system or functioning.
KHG 714107612 .
Remote controller and climaticregulator
Climatic regulator, directly connectable to theboiler. It allows the data exchange with the PCBof the boiler. Besides the crono-thermostat andclimatic regulator functions it is also a remotecontrol that allows the regulation of parametersof the boiler.
KHG 714072612 .
Outdoor sensor
The outdoor sensor is a temperature indicatorthat communicates to the boiler the outdoortemperature so that the boiler adapts the owtemperature to the comfort set by the end-user.
KHG 714072811 .
Temperature regulator formixing systems, it includes a
temperature sensor
The temperature regulator that allows to controla mixing zone (a low temperature zone). It isable to manage a mixing valve, a pump and a
ow sensor of the controlled zone. Then, it canexchange data with the PCB of the boiler by bus.
KHG 714078112 .
Bus interface for climaticregulators for boilers in cascade
It is an electronic device that allows dataexchange by bus between the electronics and thetemperature regulators.The interface allows also the remote control oftheboiler
KHG 714078013 .
Cascade controller, it includes atemperature sensor
Temperature regulator for cascade systems,allows up to 12 boilers connection ensuringfunctioning and efciency optimization. Itmanages a high temperature zone with its pump,a storage tank with its pump and temperaturesensor.
KHG 714078212 .
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Solutions for centralized heating systems installations
DimensionsPower HT from 45 to 150 kW
936,5
136,5
800
526
678,5
524
400
800
186,5
850
986,5
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Single installationwith Power HT boilers from 45 to 150 kW
Safety valve
Non-return valve
Shut-off valve
Boiler-manifold pipe hydraulic connection
Manifold pipes single boiler/last boiler
Second pump hydraulic connection
Return manifold
Flow manifold
Extension vessel hydraulic connection
Shut-off valve
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Solutions for centralized heating systems installations
Single installation
Manifold pipes single boiler/last boilerPower HT models Code Kit made of:
45-150 kW KHW 714104210 . Flow manifold
Return manifold
Second pump hydraulic connection
Power HT models Code Kit made of:
45-150 kW KHW 714098611 .
2 way shut-off valveUPS32/80 circulating pumpNon-return valveHydraulic joints
Boiler-manifold pipe hydraulic connection
Power HT models Code Kit made of:
45-150 kW KHW 714104311 .
2 way shut-off valve on returnCirculating pump UPS 32/80Non-return valveExtension vessel hydraulic connection3 way shut-off valve on ow
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Controller - bus interface connection
Bus interface is an electronic device that allows data exchange by bus between the PCB and the temperature regulator.
After removing the cover of the control panel, mount the plate (B) supplied with the bus interface, and so mount the accessory as
well (C). The at cable (A) have to be linked to the connector X40 of the electronics of the boiler. Connect the wiring (respecting
the polarity) between the connector X41 of the bus interface and the connector MB-DB of the controller.
Note: to make the connection easy between the accessory and the PCB, connect the wiring (A) to the PCB before xing the plate
(B). To allow the mounting of the cover of the control panel it is necessary to cut the two plastic pins which are on the cover just
next to the bus interface.
Bus interface for climatic
regulators for boilers in cascade
Bus interface for climatic
regulators for boilers in cascade
Bus interface for climatic
regulators for boilers in cascade
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Solutions for centralized heating systems installations
Single installation schemes
Manometro
bar
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
20
40
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
20
40
80100
T E R M O M E T R O
C
60
0
120
20
40
80100
T E R M O M E T R O
C
60
0
120
20
40
80100
T E R M O M E T R O
C
60
0
120
20
40
80100
T E R M O M E T R O
C
QAD
Manometro
mmH2O
mbar
OCI420
2
4
10
7
8
9
10
1
3
5
6
SYSTEMMA
DEOF1HIGHOUTPUTCON
DENSINGBOILERPOWERH
T,1DIRECTHIGHTEMPERA
TURE
CIRCUIT,1LOWT
EMPERATUREMIXING
CIRCUIT,1TANKFORTHESOLARINTEGRATION(OPTIO
N)
1HighoutputfloorstandingcondensingboilerPOWERHT
2Safetydevice
ISPESL(availableasoptional)
3Reductionkit
100/110
4Hydraulicsep
arator
5Outdoorsensor
6Interfaceform
ixingsystemswithtwodifferenttemperatureszones
7Flow/returnse
nsor
8DHWsensor
9Doublecoilstoragetank(DC)forintegrationwithsolarsystems(option)
10Thermostaticmixer
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Single installation schemes
DN50
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0 1 0 0
T E R M O M E T R O
C
ECO
QAD
QAD
RVA46
M/B1
MB/DB Y1/Y2
Q2
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
Allo
scar
ico
AlleUtenze
All'impiantodiRiscaldamento
MB-DB
RVA46
M/B1
MB/DB Y1/Y2
Q2
OCI420
Manometro
mmH2O
mbar
7
9
12
13
15
14
2
3 1
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C 6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C 6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C 6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
4
6
8 10
11
5
1Highoutputf
loorstandingcondensingboilerPOWER
HT
2Manifoldpipe
ssingleboiler
3Fumesmanifoldforsingleboiler
4SafetydeviceISPESL(availableasoptional)
5Interfaceformixingsystemswithtwodifferenttempe
ratureszones
6Hydraulicseparator
7PipeintankcylinderUBPT1000
8DHWsensor
9Climaticregu
latorformixedsystem
10Tanksensor
11Circulatinggroup
12Solarcontro
llerECO
13Automatica
ir-vent
14Solarcollec
torsSB25+V
15Collectorss
ensor
SYSTEMM
ADEOF1HIGHOUTPUTCO
NDENSINGBOILERPOWER
HT,
1PIPEINTANKCYLINDE
RFORHEATINGAND
DHW
PRODUCTIONINTEGRATION
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Solutions for centralized heating systems installations
Single installation schemes
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
QAZ21
Manometro
mmH2O
mbar
1
2
4
3
6
7
8
5
1
Highoutpu
tfloorstandingcondensingboilerPOW
ERHT
2
Manifoldpipessingleboiler
3
Fluetubes
forsingleboiler
4
Hydraulicseparator
5
Outdoorse
nsor
6
DHWsens
or
7
Singlecoil
SCtank
8
Safetydev
iceISPESL(availableasoptional)
SYSTEMM
ADEOF1HIGHOUTPUTCO
NDENSINGBOILERPOWER
HT,1HIGHTEMPERATUREDIRECTCIRCUIT,1TANK
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Single installation schemes
M a n o m e t r o
b a r
60
0
120
2040
80 1
00
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
20
40
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
60
0
120
2040
80100
T E R M O M E T R O
C
QAZ21
QAD
ECO
Manometro
mmH2O
mbar
AGU
2.
500
2
6
3
5
1
12
13
8
9
10
11
14
4Flat
sola
rcol
lect
ors
Flat
sola
rcol
lect
ors
1HighoutputfloorstandingcondensingboilerPOWERHT
2Manifoldpipessing
leboiler
3Fumesmanifoldforsingleboiler
4Interfaceformixing
systemswithtwodifferent
temperatureszones
5SafetydeviceISPE
SL(availableasoptional)
6Hydraulicseparator
7Outdoorsensor
8DHWsensor
9Solarcirculatinggroup
10SolarcontrollerE
CO
11Doublecoilstorag
etank(DC)
12SolarcollectorsSB25+V
13Collectorssensor
14Tanksensor
SYSTE
MMADEOF1HIGHEFFICIE
NCYCONDENSINGBOILER
POWERHT,1HIGHTEMPER
ATUREDIRECTCIRCUIT,
1MIXI
NGCIRCUIT,1TANKWITHIN
TEGRATIONWITHSOLARSYSTEM
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Solutions for centralized heating systems installations
450 450 450
2020
936,5
436,5
186,5
800
136,5
Dimensions
The distance between the boilers in cascade varies from 450 mm to 20 mm depending on manifold accessory used.Flow/return manifolds squared 100x100 with anges DN80 PN6
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with Power HT boilers from 45 to 150 kWCascade installation
Shutter kit with condensing trapFrom 110 to 110
Boiler-manifold pipe hydraulicconnection
Hydraulic connectionfor 2ndpump
Safety valve
Non-return valve
Shut-off valve
Flue pipe kit for two boilersFrom 160 to 200
Flow manifold
Return manifold
Flue pipe kit for the third boilerFrom 160 to 200
Manifold pipes singleboiler/last boiler
Manifold pipesboilers in cascade
3 way shut-offvalve
ReductionFrom 110 to 100
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Solutions for centralized heating systems installations
Cascade installations
Manifold pipes single boiler/last boilerPower HT models Code Kit made of:
45-150 kW KHW 714104210 . Flow manifold
Return manifold
Boiler-manifold pipe hydraulic connection
Power HT models Code Kit made of:
45-150 kW KHW 714104311 .
2 way shut-off valve om returnCirculating pump UPS 32/80Non-return valveExtension vessel hydraulic connection3 way shut-off valve on ow
Hydraulic connection for 2nd pump
Power HT models Code Kit made of:
45-150 kW KHW 714098611 .
2 way shut-off valve UPS32/80 circulating pump Non-return valve Hydraulic joints
Manifold pipes boilers in cascade
Power HT models Code Kit made of:
45-150 kW(45 cm between the boilers)
KHW 714099010 . Flow manifold Return manifold
45-150 kW(2 cm between the boilers)
KHW 714103611 . Flow manifold Return manifold
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Distance of the manifold from the rst boiler to the vertical chimney: 2 meters
Shutter kit installed in each boiler in cascade
The ue pipes and the connections between the ue manifold of the cascade and the chimney are not supplied by BAXI The manifolds in cascade over 200mm diameter are not supplied by BAXI
The calculation has been made assuming a PP "double wall" ue duct
The chart in the following page indicates the diameters of the flue manifold and of the chimney for various configurations of boi-
lers in cascade and for different heights of the chimney.
2 m
A
B
H
Remarks
Information for the calculation of the diameter of the
ue manifold (A) and the chimney (B)
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Solutions for centralized heating systems installations
N of boilers
in cascadeHT
1.450
HT
1.650
HT
1.850
HT
1.1000
HT
1.1200
HT
1.1500
2 Nominal outputTotal 80/60 C (kW)
90 130 170 200 240 300
Flue manifold mm (A) 125 125 160 160 160 160
Flue mm (B) -H= 5-10 m 125 125 160 160 160 200
Flue mm (B) -H=10-15 m 125 125 160 160 200 200
Flue mm (B) -H=15-20 m 125 125 160 160 200 200
3 Nominal outputTotal 80/60 C (kW)
135 195 255 300 360 450
Flue manifold mm (A) 125 125 160 160 200 200
Flue mm (B) -H= 5-10 m 125 160 160 160 200 200
Flue mm (B) -H=10-15 m 125 160 160 160 200 200
Flue mm (B) -H=15-20 m 125 160 160 160 200 250
4
Nominal output
Total 80/60 C (kW)180 260 340 400 480 600
Flue manifold mm (A) 125 160 160 160 200 200
Flue mm (B) -H= 5-10 m 160 160 160 200 200 250
Flue mm (B) -H=10-15 m 160 160 200 200 200 250
Flue mm (B) -H=15-20 m 160 160 200 200 200 300
5 Nominal outputTotal 80/60 C (kW)
225 325 425 500 600 750
Flue manifold mm (A) 160 200 160 200 200 250
Flue mm (B) -H= 5-10 m 160 200 200 200 250 250
Flue mm (B) -H=10-15 m 160 200 200 200 250 300
Flue mm (B) -H=15-20 m 160 200 200 200 250 300
Information for the calculation of the diameterof the flue manifold (A) and the chimney (B)
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Controller - bus interface connection
Bus interface is an electronic device that allows data exchange by bus between the PCB and the temperature regulator.
After removing the cover of the control panel, mount the plate (B) supplied with the bus interface, and so mount the accessory as
well (C). The at cable (A) have to be linked to the connector X40 of the electronics of the boiler. Connect the wiring (respecting
the polarity) between the connector X41 of the bus interface and the connector MB-DB of the controller.
Note: to make the connection easy between the accessory and the PCB, connect the wiring (A) to the PCB before xing the plate
(B). To allow the mounting of the cover of the control panel it is necessary to cut the two plastic pins which are on the cover just
next to the bus interface.
Bus interface for climatic
regulators for boilers in cascade
Bus interface for climatic
regulators for boilers in cascade
l
l l
Bus interface for climatic
regulators for boilers in cascade
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Solutions for centralized heating systems installations
Temperature regulator for boilers in cascade
TEMPERATURE
REGULATORFOR BOILERS
IN CASCADE
Pump of the tank
Room thermostat
Return sensor
Flow sensor
BUS INTERFACE FOR
BOILERS IN CASCADE
LINE
ENGINE
Back view
Storage tank sensorPump of the heating
system
Power 230V AC
Temperature regulator for cascade systems, allows up to 12 boilers connection ensuring functioning and
efciency optimization. It manages a high temperature zone and pump, and a storage tank.
It manages in the best way the boilers in cascade caring the modulation of the outputs and turning the
time for switching-on to make the functioning timing of the various boilers in cascade uniform.
The managing has this functioning: in case of need of heat the regulator will switch-on the rst boiler
increasing the power slowly. If the output is still not sufcient to satisfy the need, it will switch the second
boiler on, that together with the rst, will repeat the increase of the output.
The cycle will be repeated for each single new switching-on of the boiler and in case of reduction of the heat load, the cycle will
be made in the opposite way.
The aim is to optimize the functioning of the system. This climatic regulator has the availability to manage 1 zone of the high
temperature system, a pump and DHW. The regulator manages up 12 boilers in cascade, each one supplied with bus interface
for boilers in cascade and 2 mixing zones controllers.N.B. accessory that can be used only with bus interface for boilers in cascade and outdoor sensor.
Supplying: Temperature regulator for boilers in cascade+or/return sensor for boilers in cascade+connectors (KHG 714078212 .)
Connections of the climatic regulator for boilers in cascade
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Cascade installation schemes
Manometro
mmH2O
mbar
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
TERMOMETRO
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
TERMOMETRO
C
QAD
RVA47
M/B70
MB/DB
M/B10
Q1
M/B3
Q3
QAD
OCI420
OCI420
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
TERMOMETRO
C
6 0
0
1 2 0
2 0 4 0
8 0
1 0 0
TERMOMETRO
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
TERMOMETRO
C
QAZ21
CONT1
CONT2
CONT1
CONT2
CONT1
CONT2
CONT1
CONT2
CONT1
CONT2
CONT1
CONT2
CONT1
CONT2
CONT1
CONT2
7
2
10
12
13
9
3
6
14
10
1
8
1
1
14
14
14
14
14
14
14
5
4
SYST
EMMADEOF2HIGHOUTPUTCONDENSINGBOILERSP
OWERHT,1HIGHTEMPERA
TUREDIRECTCIRCUIT,
1TAN
KWITHINTEGRATIONWITH
SOLARSYSTEM(OPTION),
BUILT-INHEATBOXESRH+2
C
1HighoutputfloorstandingcondensingboilerPOWE
RHT
2Safetydevice
ISPESL(availableasoptional)
3Fumesmanifoldtwoboilersincascade
4Shutterkit
5Reductionkit
100/110
6Hydraulicsep
arator
7Outdoorsens
or
8Businterface
forclimaticregulatorsforboilersincascade
9Climaticregu
latorforboilersincascade
10Floworretu
rnsensorforcontrollerforboilers
incascadeandmixingsystem
11DHWsenso
rformixingzones
12Doublecoiltank(DC)forintegrationwith
solarsystem
s(option)
13Thermostaticmixer
14Built-inheat
boxesRH+2C
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Solutions for centralized heating systems installations
Cascade installation schemes
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
QAD
QAZ21
RVA
47
M/B70
MB/DB
M/B10
Q1
M/B3
Q3
Manometro
mmH2O
mbar
QAD
OCI420
OCI420
1
2
74
3
5
8
10
11
12
6
9
1HighoutputfloorstandingcondensingboilerPO
WERHT
2Manifold
pipestwoboilersincascade
3Fumesm
anifoldtwoboilersincascade
4Shutterk
it
5Hydraulicseparator
6Outdoor
sensor
7Businterfaceforclimaticregulatorsforboilersincascade
8Climatic
regulatorforboilersincascade
9Floworr
eturnsensorforcontrollerforboilersin
cascadeandmixingsystem
10DHWsensorformixingzones
11Double
coiltank(DC)forintegrationwithsolarsystems(option)
12SafetydeviceISPESL(availableasoptional)
SYSTEM
MADEOF2HIGHOUTPUT
CONDENSINGBOILERSPOW
ERHT,1HIGHTEMPERATU
REDIRECTCIRCUIT,
1TANK
WITHINTEGRATIONWITHSOLARSYSTEM(OPTION)
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Cascade installation schemes
Manometro
mmH2O
mbar
M a n o m e t r o
b a r
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
QAD
RVA47
RVA46
M/B70
MB/DB
MB/DB
M/B10
Q1
M/B3
Q3
QAD
M/B1
Q2
Y1/Y2
QAD
OCI420
OCI420
OCI420
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
M a n o m e t r o
b a r
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
QAD
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
T E R M O M E T R O
C
QAZ21
RVA46
M/B1
Q2
Y1/Y2
1
12
12
15
3 5
5
4
5
6
6
6
7
8
9
9
9
2
11
10
11
12
12
13
14
SYSTEM
MADEOF3HIGHOUTPUTC
ONDENSINGBOILERSPOW
ERHT,2HIGHTEMPERATUR
EDIRECTCIRCUITS,
1TANKW
ITHINTEGRATIONWITHSO
LARSYSTEM(OPTION)
1HighoutputfloorstandingcondensingboilerPOWE
RHT
2Safetydevice
ISPESL(availableasoptional)
3Fumesmanifoldtwoboilersincascade
4Fumesmanifoldforthethirdboiler
5Shutterkit
6Reductionkit
100/110
7Hydraulicsep
arator
8Outdoorsens
or
9Businterface
forclimaticregulatorsforboilersincascade
10Climaticreg
ulatorforboilersincascade
11Climaticregulatorformixingsystem
12Floworretu
rnsensorforcontrollerforboilersinca
scadeandmixingsystem
13DHWsenso
rformixingzones
14Doublecoiltank(DC)forintegrationwithsolarsys
tems(option)
15Thermostaticmixer
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Solutions for centralized heating systems installations
Cascade installation schemes
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
TERMOMETRO
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
TERMOMETRO
C
QAD
RVA47
M/B70
MB/DB
M/B10
Q1
Manometro
bar
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
TERMOMETRO
C
6 0
0
1 2 0
2 0
4 0
8 0
1 0 0
TERMOMETRO
C
Manometro
bar
Manometro
mmH2O
mbar
QAD
OCI420
OCI420
OCI420
7
1
2
6
3
5
8
4
10
10
10
10
10
10
10
10
11
9
1HighoutputfloorstandingcondensingboilersP
OWERHT
2Manifoldpipestwoboilersincascade
3Fumes
manifoldtwoboilersincascade
4Fumes
manifoldforthethirdboiler
5Shutterkit
6Hydrau
licseparator
7Busint
erfaceforclimaticregulatorsforboilersincascade
8Climaticregulatorforboilersincascade
9Floworreturnsensorforcontrollerforboilersin
cascadeandmixingsystem
10Built-inheatboxesLUNASATRS2Z
11SafetydeviceISPESL(availableasoptional)
SYST
EMMADEOF3HIGHOUTPUTCONDENSINGBOILERSPOWERHT,1HIGHTEMPERATUREDIRECT
CIRCUIT,
BUILT
-INHEATBOXESRS2Z
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300
811
203
157,5230
330
1069
143
Hydraulic separator HS 8,5 da 8,5m3/h 2 traded jointsWeight Kg 11,8 - Cod. LSD 790000310 .
Hydraulic separator HS 18 da 18m3/h anged joints 65PN 16. Weight Kg 39 - Cod. LSD 790000320 .
Maximum condensate water ow l/h 56
Max potentiality of the boiler kcal/h da 201.000 a 300.000
Max potentiality of the boiler kW 234-349
Maximum working pressure bar 2
Maximum temperature of the water content C Corresponding to the maximumtemperature of the condensate waters
Min/Max room temperature C 5-40
Quantity of the rst charge of product Kg 5
Next recharges Kg 4,5
Dimensions (hxwxd) mm 260x330x225
Neutralizer lter to process the water deriving from the condensation of BAXI condensing boilers in cascade installations Cod.KHG 714125710 . To install the neutralizer kit it is necessary to install Power HT at least at 12 cm from the oor.Recharge for the neutralizer kit (output up to 350 kW) Cod. KHG 714135410 .
For the theoretical explanation of the hydraulic separator see pages from 73 to 77
264,5
450
1279
95
Hydraulic separator HS 28 da 28m3/h anged joints 80PN 16. Weight Kg 51 - Cod. LSD 790000330 .
Hydraulic separator HS 56 da 56m3/h anged joints 100PN 16. Weight Kg 55 - Cod. LSD 790000340 .
263
450
1279
95
Hydraulic separator
Condensate neutralizer kit
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Solutions for centralized heating systems installations
Other accessories
Other accessories
Flue accessories for Power HT cascade installation
Flue accessories for Power HT 45-65 kW cascade installation
Picture Description Code
PP ue pipe kit for two boilers 160 710715201 .
PP ue pipe kit for two boilers 200 710715601 .
PP ue pipe kit for third boilers 160 710716301 .
PP ue pipe kit for third boilers 200 710716401 .
PP 90 bend 160 KHW 714097810 .
PP 90 bend 200 KHW 714098210 .
PP pipe extension 160 L=1000 KHW 714097710 .
PP pipe extension 200 L=1000 KHW 714098110 .
Picture Description Code
PP ue pipe kit for two boilers 125 710716801 .
PP ue pipe kit for two boilers 125 710717701 .
PP shutter kit 80/110 with condensing trap 710682001 .
PP 90 bend 125 KHG 714094410 .
PP 45 bend 125 (pack of 2) KHG 714094510 .
PP pipe extension 125 L=1000 KHG 714094610 .
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Other accessoriesFlue accessories for Power HT 85-150 kW cascade installation
Hydraulic accessories
Hydraulic accessories
Picture Description Code
Manifold pipes single boiler/last boiler KHW 714104210 .
Boiler - manifold pipe hydraulic connection KHW 714104311 .
2ndpump hydraulic connection KHW 714098611 .
Manifold pipes boiler in cascade(45 cm between the boilers)
KHW 714099010 .
Manifold pipes boiler in cascade(2 cm between the boilers)
KHW 714103611 .
for single installation
for cascade installation
Picture Description Code
PP shutter kit 110/110 with condensing trap 710682101 .
PP reduction kit 110/100 KHW 714096910 .
Picture Description Code
Manifold pipes single boiler/last boiler KHW 714104210 .
Boiler - manifold pipe hydraulic connection KHW 714104311 .
2nd
pump hydraulic connection KHW 714098611 .
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Solutions for centralized heating systems installations
Other accessories
Picture Description Code
Room sensor: it can be installed only withclimatic regulator for mixing system
KHG 714078410 .
Installation box for RVA controllers KHG 714096610 .
Motor for the mixing valve KHG 714078511 .
Mixing valve G1 KHG 714078310 .
Mixing valve G1/2 KHG 714078610 .
Mixing valve G3/4 KHG 714078710 .
Flow/return sensor for controller for boilers in
cascade and mixing system KHG 714078810 .
Flow sensor for clip-in module KHG 714078910 .
Hot water temperature sensor for climaticregulator for boilers in cascade
KHG 714079010 .
Hot water temperature sensor KHG 714076810 .
Thermoregulation
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