Beretta POWER PLUS User manual

POWER PLUS
WALL-HUNG
CONDENSING
BOILER
INSTALLATION INSTRUCTION

INSTALLATION INSTRUCTION
2
The POWER PLUS boilers comply with:
• Gas Appliances Directive 90/396/EEC
• Boiler Efficiency Directive 92/42/EEC
• Electromagnetic Compatibility Directive 89/336/EEC
• Low Voltage Directive 73/23/EEC.
• EN 677 standard on condensing boilers.
0085
Conformity
POWER PLUS 50 M 20019155
POWER PLUS 100 M 20019200
POWER PLUS 100 S 20019309
POWER PLUS 100 M DEP 20019201
POWER PLUS 100 S DEP 20019319

3
Dear Customer,
congratulations on your purchase of a POWER PLUS Boiler. This appliance ensures maximum
comfort for an extended period, with high reliability, efficiency, quality and safety.
The purpose of this manual is to provide all the information that we feel is necessary for the correct
and simple installation of the boiler and must be preserved and made available as and when reque-
sted to ensure correct installation, operation and maintenance.
Beretta

INSTALLATION INSTRUCTION
4
GENERAL SAFETY DEVICES pag. 5
DESCRIPTION OF THE APPLIANCE
Description “ 6
Safety devices “ 6
Identification “ 7
Structure “ 8
Technical specifications “ 9
Water circuit “ 10
Positioning the probes “ 11
Pumps “ 11
Wiring diagrams “ 14
Control panels “ 18
User interface “ 19
- Display mode “ 20
- Readout mode “ 20
- Setting the user parameters “ 21
- Monitor mode “ 22
- Installer programming mode “ 23
- Test mode “ 24
- Error mode “ 24
- Reset faults “ 24
INSTALLER
Receiving the product pag. 25
Dimensions and weight “ 25
Handling “ 26
Room where the boiler is installed “ 26
Installation in old systems or systems to be
upgraded “ 27
Installing the boiler “ 28
Water connections “ 28
Fuel connections “ 30
Flue gas outlet and combustion air intake “ 30
Electrical connections “ 33
Installing the outside probe “ 35
Filling and emptying the systems “ 36
Preparing for first start-up “ 38
TECHNICAL
Starting for the first time pag. 39
Checks during and after first start-up “ 41
Setting the functional parameters “ 45
Setting the central heating parameters “ 45
Setting the domestic hot water parameters “ 47
Setting the temperature controller “ 48
Setting the addresses for cascading
configurations “ 54
Fault codes “ 56
List of parameters “ 58
Conversion from one type of gas to the other “ 60
Adjustments “ 62
SHUTTING
Temporary shutdown “ 63
Shutting down for extended periods “ 63
SERVICING
Servicing “ 64
Cleaning the boiler and dismantling
the inside components “ 64
TROUBLESHOOTING “ 69
The following symbols are used in some parts of this
booklet:
b CAUTION = actions that require special care
and suitable preparation
aPROHIBITED = actions that absolutely must
NOT be carried out
Contents
This booklet, code 20006444 - Rev. 4 (03/10), contains 72 pages.

5
b The boilers produced in our factory are built with
care down to the last component to protect both
the user and installer from eventual accidents. We
therefore recommend qualified personnel that after
working on the product they should pay particular
attention to the wiring, especially the bare wires,
that must not be exposed outside the terminal board
for any rason to prevent any contact with the live
parts of the wiring.
b This instructions manual is integral parts of the pro-
duct. Make sure they remain with the boiler, even if
it is transferred to another owner or user or moved
to another heating system. In case of loss or dama-
ge, please contact your local Technical Assistance
Service for a new copy.
b This boiler may only be installed and serviced by
qualified fitters who satisfy the requirements of local
rules. Work must be done in compliance with regu-
lations in force and subsequent updates.
b The boiler must be serviced at least once a year.
This should be booked in advance with the Technical
Assistance Service.
b The installer shall instruct the user in the operation
of the boiler and the safety devices.
b This boiler may only be used for what it was expres-
sly built to do. The manufacturer declines all con-
tractual and non-contractual liability for injury to
persons or animals or damage to property deriving
from errors made during installation, adjustment and
servicing and from improper use.
b This appliance is used to produce hot water and
must therefore be connected to a heating and/or a
domestic hot water system, according to its perfor-
mance and power.
b After removing the packaging, make sure the con-
tents are undamaged and complete. If this is not the
case, contact your dealer.
b The safety valve outlet must be connected to a sui-
table collection and venting system. The manufac-
turer declines all liability for any damage caused by
the safety valve.
b The safety and automatic adjustment devices on the
appliance must never be modified during its lifetime,
except by the maker or dealer.
b If the appliance develops a fault and/or works badly,
switch it off and do not attempt to repair it yourself.
b Immediately after installation, inform the user that:
- in the event of leaks, he/she must shut off the
water supply and promptly inform the Technical
Assistance Service
- he/she must make regular checks to see that the
operating pressure of the system ranges between
1 and 1,5 bar, and must never be greater than 3
bar. If necessary he/she must call in professional-
ly qualified personnel from the Servicing Centre
General Safety Devices
- if the boiler is not planned to be used for a
long period, he/she should call in the Technical
Assistance Service to perform the following ope-
rations:
• turn off the main boiler and general system
switches
• close the gas and water taps on the heating cir-
cuit
• drain the heating circuit to prevent freezing.
b Connect the outlet collector to a suitable outlet
system.
Safety measures:
aThe boiler should not be used by children or unassi-
sted disabled people
aElectrical devices or equipment, such as switches,
appliances, etc., should not be used if there is a
smell of gas or fumes. If there is a gas leak, open
all the doors and windows to ventilate the area, turn
off the general gas tap and immediately call the
Technical Assistance Service
aDo not touch the boiler barefoot or if parts of your
body are wet or damp
aBefore cleaning, disconnect the electricity supply by
turning off the two-position system switch and the
main control panel switch
aIt is forbidden to modify the safety or adjustment
devices without the manufacturer’s permission and
relative instructions
aDo not pull, detach or twist the wires from the boiler
even if they are not connected to the power supply
aDo not block or reduce the size of the ventilation
openings in the room
aDo not leave inflammable containers or substances
in the room. Only for R.A.I. models: ventilation ope-
nings are necessaries to a right combustion do not
leave inflammable containers or substances in the
room
aKeep packaging out of reach of children
aOnly use appliance for purposes it is devoted to
aDo not lean any object on the boiler
aDo not tamper with sealed elements
aIt is forbidden to block the condensate outlet.

INSTALLATION INSTRUCTION
6
The POWER PLUS Boiler is a wall-hung condensing
boiler, for heating only, with a premix burner, made up of
one or two heating units, depending on the model.
The POWER PLUS Boiler can be combined in a casca-
ding configuration with other heat generators to create
modular heating plants made up of boilers connected
to the same water circuit and with electronic controllers
communicating via bus. The heat output of each heating
unit reaches 48.50 kW (100%, 50°C-30°C) and can be
modulated from 30% to 100%. The efficiency reaches
108.7% and the low flue gas outlet temperature allows
the use of a flame-retardant polypropylene flue (class
B1), with a diameter of just 50 mm and a total equivalent
height of 30 metres.The versatility of the electronic board
makes quick connection possible to all types of central
heating and domestic hot water production systems with
storage, managing three circuits operating with three
different temperatures at the same time.The individual
heating units in cascading configuration can be acti-
vated, as well as by simple rotation, in such a way that
when a certain percentage of output is reached by the
first unit, the other units start automatically, all with the
same load factor.
This means that total heat output can be provided by a
number of heat exchangers in a way that achieves the
ideal heat output / exchange area ratio for exploiting latent
condensation heat.
Dedicated boiler accessories are also available, inclu-
ding two-way valves and pumps, and combustion air
intake devices. Other accessories include water hea-
ders and flue gas headers for cascading installations,
and room controllers (for setting control parameters and
displaying temperatures and system errors).
The POWER PLUS Boiler is fitted with the following safety devices, installed on each heating unit:
Safety thermostat with automatic reset, activated if the
outlet temperature exceeds 90°C, shutting down the
burner.
Diagnosis in the water circuit, the minimum flow-rate of
the heat exchange fluid in each heating unit is controlled
by a water differential pressure switch and an electronic
safety system, using an outlet probe and a return probe.
The appliance goes into safety mode if there is insuffi-
cient water or circulation.
Flue gas outlet safety device: the flue gas probe,
located at the bottom of the exchanger, sets off an alarm
in the event of high flue gas temperatures (> 80°C). In
addition, the float in the drain trap prevents the flue gas
from passing through the condensate drain.
Fan safety device: a Hall-effect sensor constantly moni-
tors the rotation speed of the fan.
The POWER PLUS Boilers are designed for cascading
connection, which allows the creation of compact and
very flexible heating plants, due to the high degree of
modulation.
b The activation of the safety devices indicates a
potentially dangerous malfunction on the boiler;
immediately contact BERETTA or other professio-
nally qualified personnel.
After a short wait, try restarting the boiler (see chapter
on starting for the first time).
aThe boiler must never be started, even temporarily,
with the safety devices not working or having been
tampered with.
b The safety devices must be replaced by the only
using the original components supplied by the
manufacturer. See the spare parts catalogue sup-
plied with the boiler.
After having performed the repairs or replacements,
check the correct operation of the boiler.
The main features of the POWER PLUS Boiler are:
- premix jet burner with constant air-gas ratio
- output from 16.3 to 100 kW (models 100 M and 100 S)
- heat output up to 400 kW, by connecting up to 8
heating units in a cascading configuration, using the
waterconnection kit available separately
- maximum flue gas outlet temperature 80°C
- total flue gas outlet and combustion air intake length up
to 30 m, Ø 50 mm
- quick connection of the water and gas headers (optio-
nal), with outlet on the right or left
- microprocessor control with self-diagnosis, shown on
leds and the display
- the electronic controller can manage up to 60 heating
units in cascading
- frost protection function activated according to the out-
side temperature and/or the temperature of the boiler
- fitted for room thermostat in the high and low tempera-
ture zones
- outside probe to enable the climate control function
- post-circulation function for the central heating and
DHW circuits
- priority settable on the DHW, high or low temperature
circuit
- possibility to manage two circuits with fixed set point or
with climate control using two separate curves
- automatic reversal of the burner ignition order
- emergency function, which in the event of faults on the
Master board still allows the Slave boards to be control-
led.
Description
Safety Devices

7
The boilers can be identified by the:
b If the plates or other means for clearly identifying the product have been tampered with, removed or are missing,
the installation and servicing operations will be much more difficult.
- Rating plate
This shows the technical and perfor-
mance specifications.
- Packaging label
This shows the code, the serial number and the
barcode.
- Sticker for G20
Identification
Models
50 M
100 M
100 M DEP
Models
100 S
100 S DEP
1
2

INSTALLATION INSTRUCTION
8
12 34
6
7
8
5
10
9
11
24
22
23
24
22
23
21
19
20
18
12 34 12 34
6
7
5
10
9
11
14 13 12 15
17
16
21
19
20
18
17
16
14 13 12 1514 13 12 16 17
1 - Fan
2 - Combustion air intake fitting
3 - Gas valve
4 - Flue gas outlet fitting
5 - Flue gas analysis test point
6 - Outlet probe
7 - Safety thermostat
8 - SECOND combustion chamber
(models 100 M, 100 M DEP,
100 S and 100 S DEP)
9 - Return probe
10 - Condensate collection drain trap
11 - Control panel (90° rotation)
12 - Gas supply
POWER PLUS 50 M POWER PLUS 100 M - 100 M DEP
100 S - 100 S DEP
13 - Central heating return inlet
14 - Central heating flow outlet
15 - Main switch
16 - Safety valve (5,4 bar)
17 - Water differential pressure switch
18 - Drain cock
19 - Flue gas probe
20 - FIRST combustion chamber
21 - Automatic vent valve
22 - Ignition / detection electrode
23 - Panelling
Structure

9
Technical Specifications
DESCRIPTION POWER PLUS
50 M 100 M 100 S 100 M DEP 100 S DEP
Fuel G20 - G30 - G31
Appliance category II2H3+
Type of appliance B23 - C63 - C63x
Heat input ref. HHV (min - max) G20 16,3 - 50 16,3 - 100 16,3 - 100 16,3 - 77,3 16,3 - 77,3 kW
Heat input ref. NHV (min - max) G20 15 - 45 15 - 90 15 - 90 15 - 69,6 15 - 69,6 kW
Useful heat output (80°/60°C) (min - max) 14,8 - 44,2
14,8 - 88,3 14,8 - 88,3 14,8 - 68,5 14,8 - 68,5 kW
Useful heat output (50°/30°C) (min - max) 16,3 - 48,5 16,3 - 96,8 16,3 - 96,8 16,3 - 75,3 16,3 - 75,3 kW
Useful efficiency ref. NHV (80°C/60°C) 98,2 98,2 98,2 98,4 98,4 %
Useful efficiency ref. NHV (50°C/30°C) 107,7 107,7 107,7 108,2 108,2 %
Useful efficiency at 30% ref. NHV
(80°C/60°C) 98,7 %
Useful efficiency at 30% ref. NHV
(50°C/30°C) 108,7 %
Losses through the chimney with the burner
operating 1,3 %
Losses through the chimney with the burner off 0,1 %
Losses through the casing (Tm=70°C) 0,5 %
Flue gas temperature Return temp. + 5 °C
CO2at minimum - maximum G20 9,0 - 9,0 %
CO2at minimum - maximum G30 - G31 10,4 - 10,4 %
CO without air at minimum - maximum less than 11 - 91 mg/kWh
NOx class 5
Maximum operating pressure, central heating 6 bar
Maximum admissible temperature 90 °C
Range of boiler water temperature settings
(± 3 °C) 20 - 80 °C
Water content 5 10 10 10 10 l
Power supply 230 - 50 V-Hz
Maximum power input 169 333 333 333 333 W
Index of protection X0D IP
Quantity of condensate 7,2 14,4 14,4 11,2 11,2 kg/h

INSTALLATION INSTRUCTION
10
Water-side pressure drop in the boiler
The POWER PLUS Boiler does not come with a pump, which must be installed in the system.
When sizing the pump, refer to the water-side pressure drop in the boiler, as shown in the figure below.
MI RI GASSC2
SF
AA
12
3
4
5
6
7
8
SC1
9
0
PRESSURE DROP (mbar)
FLOW-RATE (l/h)
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
250 500 750 1000 1250 1500 1750 2000 2250 30002500 2750
1 - Fan
2 - Gas valve
3 - Automatic vent valve
4 - Burner
5 - Heat exchanger
6 - Condensate drain trap
7 - Drain cock
8 - Water differential pressure
switch
9 - Safety valve (5,4 bar)
AA - Air intake
SF - Flue gas outlet
SC - Condensate drain
MI - Central heating flow outlet
RI - Central heating return inlet
GAS - Gas supply
Water Circuit

11
CENTRAL HEATING
OUTLET PROBE
SAFETY THERMOSTAT
FLUE GAS PROBE
CENTRAL HEATING
RETURN PROBE
The following probes/thermostats are installed for each heating unit:
80°C
60°C
50°C
30°C
PB
PZ1
PZ2
V2V2
SE
SZ1 SB
SZ2
THE POWER PLUS Boiler does not come with a pump, which must be installed in the system.
When choosing the pump, refer to the following system diagrams.
Configuration with distribution pumps
Boiler discharge head: 7 mWC
Boiler flow-rate: 2 m3/h for each heating unit.
Also consider the pressure drops in the individual circuit.
PB - DHW pump
PZ1 - Pump in zone 1
(high temperature)
PZ2 - Pump in zone 2
(low temperature)
V2 - Two-way valve
(accessory)
SZ1 - Probe in zone 1
SZ2 - Probe in zone 2
SB - DHW probe
SE - Outside probe
b Install probes SZ1, SZ2 and SB in a probe socket (outside of the boiler).
Positioning the Probes
Pumps

INSTALLATION INSTRUCTION
12
80°C
60°C
50°C
30°C
PB
PZ1
PZ2
PP
SE
SZ1 SB
SZ2
80°C
60°C
50°C
30°C
PB
PZ1
PZ2
V2V2
SE
SZ1 SB
SZ2
(*) With this configuration the pump in the low temperature circuit is managed externally by a
thermostat (see parameter 34 on page 59).
PB - DHW pump
PZ1 - Pump in zone 1
(high temperature)
PZ2 - Pump in zone 2
(low temperature)
V2 - Two-way valve
(accessory)
PB - DHW pump
PZ1 - Pump in zone 1 (high temperature)
PZ2 - System pump
V2 - Two-way valve (accessory)
SZ1 - Probe in zone 1
SZ2 - Probe in zone 2
SB - DHW probe
SE - Outside probe
SZ1 - Probe in zone 1
SZ2 - Probe in zone 2
SB - DHW probe
SE - Outside probe
b Install probes SZ1, SZ2 and SB in a probe socket (outside of the boiler).
Configuration with injection pumps
Boiler discharge head: 6 mWC
Boiler flow-rate: 2 m3/h for each pump.
Recommended ijection pump.
Configurazione con circolatore di anello e valvole sugli elementi termici (*)
Boiler discharge head: 7 mWC.
Boiler flow-rate: 2 m3/h for each heating unit.

13
Injection pump
0
RESIDUAL HEAD (MBAR)
I
II
III
100
200
300
400
500
600
700
0123456 789
FLOW-RATE (m /h)
800

INSTALLATION INSTRUCTION
14
15
Bus
16
Com.
87
2
1
2
3
1
J9
23
22
21
Valv.Mix
OFF
0
20
Alarm
ON
118
19
J8
9
17
24V
7
6
8
1314
Input
Analogic
NTC
Circ. 2
10 9
7
6
8
12
Circ.2
11
56 J12 4321
6
2
3
4
5
J10
28
27
Pump
25
24
26
Pump 3
Pump
1
2
5
4
3
J11
NTC
1
2
NTC
NTC
4
5
3
a
m
gv
gv
gv
gv
J4
J2
J8
J10
R4
2
3J3
J6
J5
J7
F1
Fuse
3.15 A
1
R6 R5
MC
R3 R2
J12
2
BUS J14
1
R1
4
3
T1
1
2
J1
PC
BARCODE
J11 11
gv
gv
m
a
gv
gv
gv
m
a
m
a
MASTER
230V~50Hz
PB
PZ1
PZ2
VM
SZ1
SB
SE
SZ2
TA1TA2
IG
J11 4 J11 12 J11 5 J11 13 J11 6 J11 14 J11 7
J11 7
J11 14
J11 6
J11 13
J11 5
J11 12
J11
4
J11 11
IACR
J11 3
J11 10
J12 2 J12 3 J12 4
J12 4 J12 3 J12 2
J11
8
J11
1
J11
9
J11
2
J11
10
J11
3
J10 6 J10
5
J10
4
J10
3
J10
2
J10
1
J8
5
J8
4
J8
3
J8
2
J8
1
J10 6
J10 5
J10 4
J10 3
J10 2
J10 1
J9 3
J9 2
J9 1
J8 2
J8 1
3
4
7
14
1
8
J11
Main earth
pole
Joint with
sheath
Off - Max. valve
Line Pump 1
Neutral pump 1
Line DHW pump
Neautral DHW pump
Neutral Max. valve
Line Pomp 3
Neutral pump 3
On - Max. valve
Alarm
Common
Neutral 230V a.c.
Line 230V a.c.
Earth
Earth
Earth
Earth
Ebus remote cont.
24V remote cont.
Common
Analogic Input
Common Common
T. circ. 1
Common
R .
R .
T. circ. 2
Line
Earth
Neutral
Climate NTC
Common
Outlet NTC circ. 2 Outlet NTC circ. 1
Common Common
DHW NTC
Common
The control panel on POWER PLUS models 50 M, 100 M and 100 M DEP contains one master board and one or two slave
boards, depending on the output of the boiler. Models 100 S and 100 S DEP contain just two slave boards. If connecting a
series of boilers in cascading, the master board on the
POWER PLUS 50 M, 100 M or 100 M DEP manages all the boards
on the
POWER PLUS 100 S or 100 S DEP boilers via BUS.
Bus line with male
connector for connection
to another models 100 S
or 100 S DEP boiler.
Bus line with female
connector for connection
to another model 100 S
or 100 S DEP boiler.
POWER PLUS 50 M - 100 M - 100 M DEP part 1
Wiring Diagrams

15
SLAVE 1
PC J5
WD
T1
1
5
6 6
J9
BUS 1
Main
J16
J12
T3
2
1
14
3
25
n
b
m
v
g
a
10
J4
213
a
9
m
J11
612
5
4
m
m
a
11
4
2
4
313 567
J1 a
m
m
a
8
7
g
n
v
bm
12
J9
BUS 2
13
J7 J8
F1
4321
J2
J15
J14
J6
5
gv
gv
gv
m
a
5
1
T1
J2
J6 gv
4123
m
a
5
SLAVE 2
IG1
TS
SM
SR
SF
EA/ER
IG2
J10
J17
EA/ER
a
m
13
PD
VG
m
a
6
C
to main earth pole
Fuse 4A
Line
Earth
Earth
Earth
Neutral
Safety thermostat
Gas valve
Diff. pressure switch
Hall sensor power
Blower (-)
Hall sensor imput
Blower (+)
Hall sensor common
Flue gas NTC
Outlet NTC
Return NTC
to main earth pole
Line
Earth
Neutral
PB - DHW pump
PZ1 - Pump in zone 1
(high temperature)
PZ2 - Pump in zone 2
(low temperature)
VM - Mixing valve
CR - Remote control (accessory)
IA - Analogue input
SB - DHW probe
SZ1 - Probe in zone 1
SZ2 - Probe in zone 2 (low temperature)
SE - Outside probe
TA1 - Room thermostat in zone 1
(high temperature)
TA2 - Room thermostat in zone 2
(low temperature)
VG - Gas valve
TS - Safety thermostat
PD - Water differential pressure switch
SM - Outlet probe
SR - Return probe
SF - Flue gas probe
EA/ER - Ignition/detection electrode
C - Cable for connection to two-way valve
or injection pump (accessories)
IG - Main boiler switch
IG1 - FIRST heating unit switch
IG2 - SECOND heating unit switch
J10/J17 - Microswitches for setting the address
(see page 54)
SYSTEM
b The pumps should be connected by installing suitable contactors with manual emergency operation.
HEATING UNIT
parte 2

INSTALLATION INSTRUCTION
16
POWER PLUS 100 S - 100 S DEP part 1
IG
PC
L = 1500 mm
Fuse 4A
J4
J5
Main
T3
2
BUS 1
J9
1
J16
J7
WD
1
T1
gv
1
15
234
J12
n
g
v
m
b
3
J8
F1
a
m
gv
1
11109
6
4
35
12
a
a
m
m
a
m
v
n
g
bm
4
78
a
4
J11
31
34
22
J1
75
66
5
a
m
m
5
J6
J14
J2
123
J15
gv
a
m
gv
gv
gv
a
m
3
m
a
gv
gv
230V~50Hz
SLAVE 1
EA/ER IG1
TS
SM
SR
SF
J10
J17
VG
a
13
m
PD
m
a
6
C
to main earth pole
Main earth
pole
Joint with
sheath
Earth
Line
Neutral
Earth
Neutral
Line
Earth
Earth
Gas valve
Safety thermostat
Diff. pressure switch
Hall sensor common
Blower (+)
Hall sensor imput
Blower (-)
Hall sensor power
Flue gas NTC
Return NTC
Outlet NTC
Bus line with male
connector for connection
to another model 100 S
or 100 S DEP boiler.

17
J12
BUS 1
PC
L = 1200 mm
J5
Main
T3
1
WD
T1
gv
J7
13
1
J16
1 2
J9 J4
6
21 5
34
a
m
m
a
a
91011
m
J2
J15
J14
J6
J1
J11
n
145
23
b
v
g
m
J8
F1
Fuse 4A
4
a
4
23
32 4166
575
m
a
7
m
8
321
gv
m
a
gv
5
gv
v
bm
n
g
SLAVE 2
EA/ER IG2
TS
SM
SR
SF
J10
J17
a
13
m
PD
VG
m
a
6
C
to main earth pole
Line
Neutral
Earth
Earth
Earth
Gas Valve
Safety thermostat
Diff. pressure switch
Hall sensor common
Blower (+)
Hall sensor imput
Blower (-)
Hall sensor power
Flue gas NTC
Return NTC
Outlet NTC
VG - Gas valve
TS - Safety thermostat
PD - Water differential pressure switch
SM - Outlet probe
SR - Return probe
SF - Flue gas probe
EA/ER - Ignition/detection electrode
C - Cable for connection to two-way valve or injection pump (accessories)
IG - Main boiler switch
IG1 - FIRST heating unit switch
IG2 - SECOND heating unit switch
J10/J17 - Microswitches for setting the address (see page 54)
part 2
Bus line with female
connector for connection
to another model 100 S
or 100 S DEP boiler.

INSTALLATION INSTRUCTION
18
1
12
11
131415 1612 13 14
1
12
23 5 76810911
131415 1612 13 14
1235768109
15 1612 13 14
4
4
1 - FIRST heating unit switch
2 - Button for selecting
the operating mode
3 - Reset button (Master)
4 - Boiler lockout signal
5 - Button for selecting
the parameters
6 - Display
7 - Save button
8 - Button to increase values
9 - Button to decrease values
10 - SECOND heating unit switch
11 - Slave power supply signal
- slow flashing = stand-by
- rapid flashing = ignition cycle
- fixed light = flame detected
12 - Slave lockout signal
13 - Reset button (Slave)
14 - Instrument panel
15 - Main boiler switch
POWER PLUS 50 M
POWER PLUS 100 M - 100 M DEP
POWER PLUS 100 S - 100 S DEP
Control Panels

19
- The domestic hot water priority function whereby when
there is demand for domestic hot water, the master
board can also serve the high or low temperature cir-
cuit.
- The frost protection function, also active in standby,
which starts the pump in the high temperature circuit
and the loop pump if the temperature in the manifold
falls below 5°C.
If the outside probe is fitted, the pumps start if the out-
side temperature falls below 3°C.
If after 10 minutes the temperature in the manifold is
less than 5°C, one burner starts at maximum output,
until the temperature in the manifold reaches 20°C.
If after 10 minutes the temperature in the manifold
exceeds 5°C but the outside temperature is less than
3°C, the pumps stay on until the outside temperature
exceeds this value.
- The dispersion function: the pumps in the high and low
temperature circuits remain on for 5 minutes after the
last burner has shut down. There is a 6 minute delay
from when the burner shuts down before closing the
two-way valve. When the last burner has shut down,
the valve closes only when there is no demand from the
room thermostat.
- The cascading function: to manage the output delive-
red by the system, the minimum and maximum number
of burners started can be selected.
- The burner on/off control function: in both cascading
modes there is a function that limits the ignition and
shutdown of the burners in the event of low heating
requirement.
Functional notes
The control panel on the POWER PLUS Boiler models 50 M, 100 M and 100 M DEP manages:
The buttons on the POWER PLUS 50 M, 100 M and 100 M DEP control panel have different functions in different
modes. For example, the combination of two buttons corresponds to one specific function. Alternatively, a function can
be activated by pressing the button briefly or by holding it for around 5 seconds.
Reset
This resets the electronic board after a permanent
lockout.
Set/esc
This is used to enter parameter setting mode and monitor
mode on the individual units.
[
This is used to display the operating status of the various
circuits managed by the Master board.
+and -
These increase or decrease a certain value
MEMO
This is used to save the new values.
User Interface

INSTALLATION INSTRUCTION
20
DISPLAY MODE
The red LED (see ref. 5 on page 18) comes on in the event of faults that cause the permanent lockout of a heating unit
(normal operation is reset only by pressing the Master or Slave reset button).
The 3 digits with seven segments display the status of the system:
Status of the system Display
No central heating or DHW demand.
The two digits on the right display the outlet temperature T1. E.g.: T1 = 30°C
Demand from circuit no.1 or from circuits 1 and 2 together.
The two digits on the right display the outlet temp. T1. E.g.: T1 = 80°C
Demand from the DHW circuit or simultaneous operation.
The two digits on the right display the outlet temp. T1 E.g.: T1 = 80°C.
The decimal point after the 1st digit on the left flashes
Demand from the 2nd circuit
The two digits on the right display the outlet temperature T1. E.g. T1 = 80°C.
READOUT MODE
(TEMPERATURE VALUES AND OPERATING STATUS OF THE VARIOUS CIRCUITS)
Press the “[” button to scroll forwards and display the values set for the individual circuits.
The values listed below will be displayed in sequence when pressing the “[” button.
Value displayed Display
1 Outlet temperature T1 in the high temperature circuit. E.g. : T1 = 80°C
2 DHW temperature T3. E.g.: storage heater temperature = 50°C
3 Outside temperature T4. E.g. T4 = 7°C
4 Outlet temperature in 2nd circuit or low temperature circuit T6
5 Room thermostat in the 1st circuit, closed or open.
OFF = contact open
ON = contact closed
6 Room thermostat in the 2nd circuit, closed or open
OFF = contact open
ON = contact closed
7 0-10V analogue input
E.g. 5.5V, 10V
Anti-frost function