Riello Condexa PRO Series User manual

A Carrier Company
Condensing generators
Condexa Pro
Wall-hung gas condensing modules
Stand alone installation
In conformity with Directive 2009/125/EC
Condensing thermal modules for indoor applications
Modular design to ensure an easy and fast installation
Low polluting emissions, Class 6 (DIN EN 15502)

2
CONDENSING GENERATORS
Wall-hung gas condensing modules
Condexa Pro
PRODUCT OVERVIEW
Condexa PRO is the new Riello proposal as a modular condensing wall-hung system, capable to ensure extremely high
performance levels and to cover a wide range of applications for indoor installation, with sealed combustion; stand alone or
cascade configurations are possible with heat outputs up to 970 kW.
The range consists of 3 models with thermal modules from 45 up to 97 kW. 70 P and 100 P models are equipped with the innovative
heat exchanger with patented geometries, consisting of two smooth concentric stainless steel pipes, each having a pentagonal
inner section and a circular outer section, designed to maximize the exchange surface and offer maximum corrosion resistance.
The 50 P model is equipped with an helical, single principle exchanger, with a “P” shaped cross section.
The primary circuit pump with modulating regulation allows working with a settable constant DT, reducing set-up plant
regime times and maximizing condensation. The basic electronics include climate control, module cascade management, with
integrated master / slave functions, automatic summer / winter switching and the possibility of managing both a direct zone
and a DHW tank.
The electronics also offers the possibility of remote management via 0-10V input or with the Modbus protocol. Standard
equipment includes: boiler drain tap, safety valves, LPG conversion kit, wall support and the condensate drain syphon. Through
appropriate accessories there is also the possibility of managing the distribution of the secondary circuit, up to 16 mixed zones.
The optimal combustion management and the high modulation ratios from 1 up to 50 for the cascade installations with 10
thermal modules allow high efficiencies and low pollutant emissions (Class 6, UNI EN 15502-1).
– Service continuity is guaranteed by the system modularity: even in the case of a module failure, the overall operation it is
not prejudiced;
– The anti-freeze and anti-seize functions ensure operation in all weather conditions
– Maximum operating pressure: 3 bar
– A wide range of accessories is available to ensure a simple, fast and complete cascade installation.

3
Condexa Pro
CONDEXA PRO 50 P - 70 P - 100 P
TECHNICAL DATA
MODEL CONDEXA PRO
50 P
CONDEXA PRO
70 P
CONDEXA PRO
100 P
Material Steel Steel Steel
Efficiency class > 93 + 2 log Pn > 93 + 2 log Pn > 93 + 2 log Pn
Fuel NG-LPG NG-LPG NG-LPG
Test room temperature °C 20 20 20
Max. rated heat input at furnace (LCV) kW 45,0 68,0 97,0
Min. rated heat input at furnace (LCV) kW 9,0 14,0 19,4
Max. rated heat output (80-60°C) kW 44,2 67,0 95,2
Min. rated heat output (80-60°C) kW 8,9 13,5 19,2
Max. rated heat output (50-30°C) kW 48,8 72,9 105,1
Min. rated heat output (50-30°C) kW 9,9 14,9 21,1
Efficiency at max. rated heat output (80-60°C) %98,3 97,9 98,1
Efficiency at min. rated heat output (80-60°C) %98,9 98,9 98,8
Efficiency at max. rated heat output (50-30°C) %108,6 108,1 108,2
Efficiency at min. rated heat output (50-30°C) %109,7 109,3 109,2
Useful efficiency at 30% %109,2 108,8 109,0
Heat loss in standby mode %0,1 0,1 0,1
Chimney losses with burner on at P.max %2,3 2,3 2,6
Chimney losses with burner on at P.min %0,1 0,1 0,2
Blanket losses with burner on with 70°C average
Temperature %1,1 0,9 0,9
Blanket losses with burner off with 70°C average
Temperature %1,1 0,9 0,9
Flue gas temperature at max. and min. power 80-60°C °C 67,5 / 61,0 72,0 / 61,0 78,0 / 62,0
Flue gas temperature at max. and min. power 50-30°C °C 45,0 / 32,0 46,0 / 33,0 49,0 / 35,0
Excess air at max.power 1,27 1,27 1,27
Excess air at min.power 1,27 1,27 1,27
Max-min flue gas mass flow rate kg / s 0,0200-0,0050 0,0300-0,0070 0,0460-0,0072
Available useful discharge head P.max Pa 480 630 610
Available useful discharge head P.min Pa 45 35 32
Flue side pressure drop mbar --- --- ---
NOx mg/kWh 43,9 36,4 38,7
Water-side resistance (DT 20°C) mbar --- --- ---
Available useful discharge head (DT 20°C) mbar 250 390 350
Water-side resistence (DT 10°C) mbar --- --- ---
Available useful discharge head (DT 10°C) mbar --- --- ---
Water content l 5 15 17
Maximum working pressure bar 333
Expansion tank capacity l--- --- ---
Power supply V/Hz 230-50 230-50 230-50
Electrical protection level IP IPX4D IPX4D IPX4D
Electrical consumption with boiler at max. power W200 175 345
Electrical consumption with boiler at min. power W34 30 31
Electrical consumption with pumps at max. power W--- --- ---
Electrical consumption with pumps at min. power W--- --- ---
Flue gas discharge diameter mm 80 80 110
Empty weight kg 66 78 81
Category according to UNI 10642 II 2H3P appliance II 2H3P appliance II 2H3P appliance
Boiler water content l--- --- ---
Boiler losses W / K --- --- ---
Boiler material --- --- ---
Insulation thickness mm --- --- ---
Boiler circulator absorption W--- --- ---
Sanitary expansion vessel l--- --- ---
Noise dB(A) 52 54 56
Nominal/min natural gas pressure supply (G20) mbar 20 / 17 20 / 17 20 / 17
Nominal/min natural gas pressure supply (G31) mbar 37 / 25 37 / 25 37 / 25

4
CONDENSING GENERATORS
Wall-hung gas condensing modules
ErP TECHNICAL DATA
MODEL CONDEXA PRO
50 P
CONDEXA PRO
70 P
CONDEXA PRO
100 P
Seasonal efficiency class in
central heating mode A A ---
Seasonal efficiency class in water heating --- --- ---
Useful (rated) heat output Pn kW 44,2 68 95
Seasonal efficiency class in room heating mode ηs%94 94 94
USEFUL THERMAL POWER
At useful heat output and at high temperature capacity
(*) P4 kW 44,2 67 95,3
At 30% of useful heat output and at low temperature
capacity (**) P1 kW 14,7 22,3 31,7
EFFICIENCY
At useful heat output and at high temperature capacity
(*) η4%88,4 88,2 88,2
At 30% of useful heat output and at low temperature
capacity (**) η1%98,2 98,0 98,0
AUXILIARY ELECTRICAL CONSUMPTION
At full load elmax W105 77 203
At partial load elmin W34 30 31
In standby mode PSB W 9 13 6
OTHER PARAMETERS
Thermal losses in Stand-by mode Pstby W57,0 87,0 124,0
Pilot flame energy consumption Pign W--- --- ---
Yearly energy consumption QHE GJ 91 141 ---
Noise level, indoor (sound power) LWA dB 52 54 56
Nitrogen oxide emissions (NOx) NOx mg/kWh 43,9 36,4 38,7
FOR COMBINED HEATING EQUIPMENT
Declared load profile
Energy efficiency class in water heating ηwh %--- --- ---
Daily electrical energy consumption Qelec kWh --- --- ---
Daily fuel consumption Qfuel kWh --- --- ---
Annual electrical energy consumption AEC kWh --- --- ---
Annual fuel consumption AFC GJ --- --- ---

5
Condexa Pro
BOILER MODELS CONDEXA
PRO 50 P
CONDEXA
PRO 70 P
Condexa
PRO 100 P
MAXIMUM THERMAL POWER
Useful (80/60°C) kW 44,2 67 95,2
Useful (50/30°C) kW 48,8 73,9 105,1
Furnace kW 45,0 68 97
MINIMUM THERMAL POWER
Useful (80/60°C) kW 8,9 13,5 19,2
Useful (50/30°C) kW 9,9 14,9 21,1
Furnace kW 9,0 14 19,4
EFFICIENCY
Useful (80/60°C) %98,34-
98,9 98,1-98,9 98,1-98,8
Useful (50/30°C) %108,6-119,7 108,1-109,3 108,2-109,2
With reduced load 30% (return 30°C) % 109,2 109 109
COMBUSTION
Chimney and blanket losses with
burner on %2,3-1,1 2,3-0,9 2,6-0,9
Chimney losses with burner off %0,1 0,1 0,1
Flue flow rate kg / s 0,020 0,03 0,046
GAS EMISSION VALUES AT MAX AND MIN FLOW RATES G20 (**)
MAXIMUM
CO s.a. less than (***) ppm 73 90 92
CO2% 9 9 9
NOx (EN 677) (***) ppm 30 30 30
Flue temperature °C 67,5 72 78
DT flue - return water K 7,50 12 18
MINIMUM
CO s.a. less than (***) ppm 2,3 6,5 7,5
CO2% 9 9 9
NOx (EN 677) (***) ppm 30 30 30
Flue temperature °C 61 61 62
DT flue - return water K 1 1 2
NOx class 6 6 6
Electric power: circulator, total 105 77 203
(**) Verification carried out with concentric pipe Ø 60-100 mm length 0.85 m; water temperatures 80-60 °C.
(***)Graphs for intermediate power values are also available. The expressed data must not be used to certify the plant; for certification the data
indicated in the "installation manual" measured at the time of the first ignition must be used.
LAW TABLE 10

6
CONDENSING GENERATORS
Wall-hung gas condensing modules
OVERALL DIMENSIONS
LP
H
Fumi Aria (opz)
Ritorno
G 1” 1/2
Gas
G 1”
Mandata
G 1” 1/2
Scarico condensa
Ø 24 mm
Ø Ø
96 92
96
92
SYSTEM LAYOUT
Condexa PRO 50 P
Commercial
description
H
mm
L
mm
P
mm
Ø fumes/
air
mm
Net
weight
kg
CONDEXA PRO 50 P 1000 600 435 80 66
CONDEXA PRO 70 P 1000 600 435 80 78
CONDEXA PRO 100 P 1000 600 435 110 81
Fumes Air (acc)
1
3
6
23
22
24
7
17
9
2
5
4
1
2
3
4
6
5
7
8
10
9
11
24
21
22
23
25
17
18
19
20
16
13 14 1512
1 烟气分析检测口
2 烟气排气管
3 燃气阀
4 风机
5 烟气压差开关
6 燃烧室
7 主控板
8 最小压力开关(0.7 bar)
9 烟气温度传感器
10 冷凝水收集器
11 排水阀
12 电源开关
13 采暖回水口
14 燃气供气管
15 采暖供水管
16 冷凝水排放管
17 流量传感器
18 循环泵
19 回水温度传感器
20 控制面板
21 过热保护（需手动复位）
22 流量传感器
23 自动排气阀
24 点火/火焰检测电极
25 外壳

7
Condexa Pro
Condexa PRO 70 P
Condexa PRO 100 P
1
4
5
6
10
16
2
20
21
22
3
15
1211 13 14
1
2
3
4
5
6
7
8
9
10
21
19
20
22
23
16
18
24
17
1 烟气分析检测口
2 烟气排气管
3 燃气阀
4 风机
5 燃烧室
6 主控板
7 烟气止回阀
8 排水阀
9 最小压力开关（0.7bar）
10 循环泵
11 电源开关
12 供暖回水管
13 燃气供气管
14 采暖供水管
15 冷凝水排放管
16 流量传感器
17 烟气温度传感器
18 回水温度传感器
19 控制面板
20 点火/火焰检测电极
21 过热保护（需手动复位）
22 流量传感器
23 自动排气阀
24 外壳
109 11 12
1
2
3
4
5
6
7
8
18
22
14
20
19
21
16
15
17
23
1
3
4
5
14
2
20
21
13
24
1 烟气分析检测口
2 烟气排气管
3 风机
4 燃烧室
5 主控板
6 烟气止回阀
7 排水阀
8 最小压力开关（0.7−bar）
9 电源开关
10 供暖回水管
11 燃气供气管
12 采暖供水管
13 冷凝水排放管
14 流量传感器
15 燃气阀
16 烟气温度传感器
17 回水温度传感器
18 控制面板
19 点火/火焰检测电极
20 过热保护（需手动复位）
21 流量传感器
22 自动排气阀
23 外壳
24 循环泵

8
CONDENSING GENERATORS
Wall-hung gas condensing modules
HYDRAULIC CIRCUIT
1. Heat exchanger
2. Circulator
3. Drain tap
4. Minimum pressure switch
5. NTC return probe
6. NTC flow probe
7. Safety thermostat temperature sensor
8. Automatic bleed valve
9. Flow meter
F Central heating flow
R System return
2
9
MR
1678
3
4
5
CIRCULATORS
0
100
200
300
400
500
600
700
800
900
1000
1100
0 1,5 2 2,5 3 3,510,5 4 4,5 5
Condexa PRO 50 P
Condexa PRO 70 P
Condexa PRO 100 P

9
Condexa Pro
Vista frontale
Vista inferiore
RF
B
A
F
H
C
D
E
RG F
CD
HYDRAULIC CONNECTIONS AND FUMES DISCHARGE
The dimensions and position of thermal module's hydraulic connections are shown in the table below.
DESCRIPTION Condexa PRO
50 P 70 P 100 P
Amm 387 387 387
Bmm 143,5 143,5 143,5
Cmm 63,5 63,5 63,5
Dmm 283,5 283,5 283,5
Emm 98,5 98,5 98,5
Fmm 92,5 92,5 92,5
H(optional 3-way
valve connection)
mm 202,5 - -
F(System flow) ØG 1 ”1/2 M G 1 ”1/2 M G 1 ”1/2 M
R(System return) ØG 1 ”1/2 M G 1 ”1/2 M G 1 ”1/2 M
CD (condensate drain) Ø mm 25 25 25
GGas input ØG 1" M G 1" M G 1" M
Front view
Bottom view

10
CONDENSING GENERATORS
Wall-hung gas condensing modules
WATER IN THE PLANT
Before connecting the thermal module, it is necessary to clean the system. This step is absolutely required when the appliance
replaces another one on pre-existing systems.In order to carry out this cleaning activity, if the old generator is still installed
on the system, it is advisable to:
• Add a de-scaling additive.
• Operate the system with the generator on for around 7 days.
• Discharge dirty system water and flush the system one or more times with clean water.
If the system is very dirty, repeat the last procedure one more time.In case of new installation or if the old generator is not
present or available, use a pump to circulate the additive water in the system for about 10 days and carry out the final washing
as described in the previous paragraph.
Once the cleaning has been completed, it is recommended to add a suitable protective fluid to the system's water before
installing the thermal module.
Do not use incompatible liquid detergents, including acids (eg chloridric acid and similar) in any concentration.
Do not subject the exchanger to cyclical pressure variations because the fatigue stress is very dangerous for the integrity of the
system components.
Sludge, limestone and contaminants present in the water can lead to irreversible damage to the heat generator, even in short
times and regardless of the quality level of the materials used.
The quality of the water used in the heating system must comply with the following parameters:
Parameters Value Unit
General characteristic Colorless, without sediment
PH value Min 6.5; Max 8 PH
Dissolved oxygen <0.05 mg / l
Total iron (Fe) <0.3 mg / l
Total Copper (Cu) <0.1 mg / l
Na2SO3 <10 mg / l
N2H4 <3 mg / l
PO4 <15 mg / l
CaCO3 Min 50; Max 150 ppm
Trisodium phosphate None ppm
Chlorine <100 ppm
Electrical conducibility <200 microsiemens / cm
Pressure Min 0.6; Max 6 bar
Glycol Max 40% (only propylene glycol) %
All the data in the table refer to the water contained in the system after 8 weeks' operation.
Do not use excessively softened water. Excessive water softening (total hardness < 5° f) results in corrosion due to contact with
metal elements (pipes or thermal module components).
Immediately repair any leaks or drips that could result in air entering the system.
Excessive pressure fluctuations can cause stress and fatigue to the heat exchanger.
Maintain a constant operating pressure.
Water used to fill a system for the first time and water used to top it up must always be filtered (using synthetic or metal mesh
filters with a filtration rating of no less than 50 microns) to prevent sludge from forming and triggering deposit corrosion. If
oxygen enters a circuit continuously or even intermittently (e.g. in under-floor heating systems whose pipes are not protected
by impermeable synthetic sheaths, in circuits with open expansion vessels, or in circuits that require frequent top-ups) always
separate the boiler’s water circuit from the central heating circuit.
It is prohibited to top up the heating system constantly or frequently, since this can damage the thermal module's heat
exchanger. The use of automatic topping up systems should be avoided for this reason.
To sum up, in order to eliminate contact between air and water (and to prevent the latter from becoming oxidized), it is
necessary:
• that the expansion system be a closed vessel, correctly sized and with the correct pre-loading pressure (to be regularly
checked);
• that the system be always at a pressure higher than the atmospheric one at any point (including the pump suction side)
and under any operating conditions (all seals and hydraulic couplings in a system are designed to withstand pressure
towards the outside, but not underpressure);
• the installation be not made with gas-permeable materials (e.g. plastic pipes without oxygen barrier for underfloor
heating systems).
Damages suffered by the thermal module, caused by encrustations and corrosion, are not covered by warranty.

11
Condexa Pro
Key
SCH display PCB and controls
M01 Low voltage terminal
block, 1-10 V input
TA Room thermostat/ heat
request
EA Ignition electrode
Modbus Modbus output
SB Tank probe (acc.)
SS System probe (acc.)
SE External probe (acc.)
PWM PWM connection
Key
M02 High voltage terminal block
PB 2-way valve
PI Plant circulator
(DHW) Sanitary circulator
PC Thermal module circulator
PS System circulator
AL Alarm output
AE Electrical supply
BUS 2BUS 1 ES MWPSB SSModbus
MO1
0-10V TA
SCH
PWM
0V (GND)
J21-1 / J6-1
J9-1 J9-3 J9-2 J9-4 J6-1 J6-1 J6-8 J6-8 J6-4 J6-11 J6-6 J6-13 J6-7 J6-14 J7-5 J7-10
J8-1 J8-2
J21-6
J21-3
J21-4 / J6-8
J21-5 / J6-2
b
bl
h
h
b
bh
1 2 3 4 115 6
J21
PC (*)
MO2
AE (230V ~ 50Hz)PI PC (PS)(ACS) ALPB
PWM
0V (GND)
L
N
L N L N
N LL L N
J3-10
J3-4
J2-3
J3-9
b
g
h
h
J3-6 b
L NL N
101 102 103104 105106 107 108109 110 115114113112111
7 8 10
912 13 14 15 16 17 18
J21
INSTALLING THE EXTERNAL TEMPERATURE PROBE (ACCESSORY)
The correct positioning of the external probe is fundamental for the proper functioning of the climate control.
The probe must be installed outside the building to be heated, at about 2/3 of the height of the north or north-west facade and
away from chimneys, doors, windows and sunny areas.
The probe must be placed in a smooth wall stretch; in the case of exposed bricks or irregular walls, a smooth contact area
should be provided.
The maximum length of the connection between the external probe and the control panel is 50 m. In case of connections with
a cable longer than 50 m, check that the value read by the card corresponds to a real measurement and use parameter 39 to
make any correction.
The connection cable between the probe and the control panel must not have joints; if necessary, it must be tinned and
adequately protected.
Any ducting of the connection cable must be separated from live cables (230V AC).
If the external probe is not connected, parameters 14 and 22 should be set to “0”.
ELECTRICAL WIRING
The injection pumps are piloted with PWM signal to work with constant DT.

12
CONDENSING GENERATORS
Wall-hung gas condensing modules
T (°C) R (° Ω)
0 27396
5 22140
10 17999
15 14716
20 12099
25 10000
30 8308
35 6936
40 5819
45 4904
50 4151
55 3529
60 3012
65 2582
70 2221
80 1663
85 1446
90 1262
95 1105
100 970
0
2000
R (Ohm)
∆T (K)
4000
6000
8000
10000
12000
14000
0,0
0,5
1,0
1,5
2,00
2,5
3,0
3,5
0 20 25 3010 40 60 7050 80 90 100
T (C°)
Correspondence table valid for all probes
CONTROL PANEL
21 3 4 5 6 7 98 10
1. 255x80 backlit display (106,4x39,0mm)
2. RESET button: allows operation to be
restored after a fault stop
3. MENU button: allows access to the main
menu
4. ESC button: in the menu navigation it
allows to exit from a menu item and
return to the previous one
5. Navigation button ◄
6. Navigation button ▼
7. Navigation button ●
8. Navigation button ►
9. Navigation button ▲
10. Main switch (located on the bottom of
the appliance)

13
Condexa Pro
DISCHARGE OF COMBUSTION PRODUCTS
The appliance is supplied as standard in type C configuration (C13 - C33 - C53 - C63), offering the possibility to draw air directly
from the installation room or from the outside, in this case with the possibility of having coaxial or split pipes.
It is essential that only specific pipes for condensing boilers are used for extracting the combustion air and that the connection
is made correctly as indicated by the instructions supplied with the smoke accessories. Do not connect the smoke evacuation
ducts of this appliance to those of other appliances unless expressly approved by the manufacturer. Failure to comply with this
warning may result in accumulation of carbon monoxide which can cause serious personal injury or death.
Ensure that the combustion air (intake air) is not contaminated by:
• waxes/chlorinated detergent
• chemical products based on swimming pool chlorine
• calcium chloride
• sodium chloride used for water softening
• refrigerant leaks
• paint or varnish removal products
• hydrochloric acid / muriatic acid
• cements and glues
• antistatic softeners used in dryers
• chlorine used for domestic or industrial purposes as a detergent
• whitener or solvent
• adhesives used to glue construction products and others
• similar products.
To prevent contamination, do not install suction line air intakes and gas flue extraction pipes near:
• dry-cleaners/laundry rooms and factories
• pools
• metallurgy processing plants
• beauty parlours
• fridge repair shops
• photo processing facilities
• body-shops
• plastics manufacturing plants
• furniture workshops and manufacturing plants.
The exhaust duct and the fumes connection must be made in compliance
with the standards, current legislation and local regulations.
The use of rigid ducts that are resistant to temperature, condensation,
mechanical stress and tightness is mandatory.
Non-insulated exhaust ducts are potential sources of danger.
UF AA
326
96
92
230
DESCRIPTION Condexa PRO 50 P Condexa PRO 70 P Condexa PRO
UF (fumes outlet) DN80 DN80 DN110 Ø
AA (air intake) DN80 DN80 DN110 Ø
Check that condensation does not build up along the duct. For this purpose, provide a sloping duct of at least 3 ° towards the
appliance in the presence of a horizontal section. If the horizontal or vertical section is longer than 4 meters, it is necessary
to provide a siphoned drainage of the condensate at the foot of the pipe. The useful height of the siphon must be at least the
value "H" shown in the table. The drain of the siphon must therefore be connected to the sewerage system.
For changes of direction, use a T-fitting with an inspection cap which allows easy periodic cleaning of the pipes.
Always make sure that after cleaning the inspection plugs are hermetically closed with the relative seal intact.

14
CONDENSING GENERATORS
Wall-hung gas condensing modules
≥3°
H 350 mm
Description Discharge head
Max Min
Condexa PRO 50 P 480 45
Condexa PRO 70 P 630 35
Condexa PRO 100 P 610 32
ACCESSORIES FOR STAND ALONE INSTALLATION
GUIDE TO SYSTEM CONFIGURATION WITH STAND ALONE BOILER AND ACCESSORIES SELECTION
1. ACCESSORIES TO COMPLETE THE SYSTEM
2. OPTIONAL ACCESSORIES
2.1 Additional safety devices
2.2 Hydraulic separator or plate heat exchanger
2.3 Secondary circuit management
2.4 Flue system
2.5 Treatment system for neutralising
condensate

15
Condexa Pro
Image Description CONDEXA PRO
50 P 70 P 100 P
1. ACCESSORIES TO COMPLETE THE SYSTEM
External probe: it contains a probe to be installed in external
environment, model: NTC 10 kOhm@25°C, used for the climatic mode of
operation.
N.1 probe for each cascade system, to be wired in the Master boiler. •••
2. OPTIONAL ACCESSORIES
2.1 Safety devices
Manifold kit with safety devices for stand alone installation: flow
manifold and housing of the safety devices for Condexa PRO stand
alone installations.
Accessory installed in the area below the boiler, allowing a
considerable saving of the space occupied.
kit composed with 3" manifold, insulation and the safety devices
listed below:
• Bourdon spring pressure gauge
• Safety pressure switch for manifold
• Thermometer 0-120 ° C 1/2 '' G.
• Safety valve VST 1/2 '' x 3/4 '' 5.4 bar
• Gas shutting valve (VIC) suitable up to 135 kW
•••
Hydraulic separator connection kit for stand alone boiler: flow
connection pipe.
Accessory installed in the area below the boiler, allowing a
considerable saving of the space occupied.
Complete with insulation, contains flow connections for both heating
and DHW circuit.
•••
2.2 Hydraulic separator or plate heat exchanger
Horizontal hydraulic separator kit for stand alone boiler: 4"
hydraulic separator
with insulation, for Condexa PRO stand alone installation.
It allows the hydraulic separation between the primary circuit and
the secondary circuit, balancing the differences in flow between
the circuits.
This device is necessary on systems equipped with control of
zones by means of thermostatic valves, in which the condition of
"zero" flow on the secondary circuit can be verified.
Accessory installed in the area below the boiler, allowing a
considerable saving of the space occupied.
This kit (combined with the safety manifold or with the
connector-to-the hydraulic separator manifold) acts as a
compensator / manifold reducing installation costs; therefore
it allows to have 2 flows (1 for the heating circuit and 1 for the
storage tank) and 2 returns.
•••
Plate heat exchanger kit for 50 stand alone boiler: it consists
of a braze-welded plate heat exchanger sized with DTml = 7.2 ° C,
support bracket and connections to the boiler. This kit requires
the installation of the support frame kit. •
Plate heat exchanger kit for 70 stand alone boiler: it consists
of a braze-welded plate heat exchanger sized with DTml = 7.2 ° C,
support bracket and connections to the boiler with a manifold
for three way valve installation (accessory). This kit requires the
installation of the support frame kit. •
Plate heat exchanger kit for 100 stand alone boiler: it consists
of a braze-welded plate heat exchanger sized with DTml = 7.2 ° C,
support bracket and connections to the boiler with a manifold
for three way valve installation (accessory). This kit requires the
installation of the support frame kit. •

16
CONDENSING GENERATORS
Wall-hung gas condensing modules
Image Description CONDEXA PRO
50 P 70 P 100 P
2-way valve kit: this valve can be installed only coupled with one
of the “Plate heat exchanger kit” in order to satisfy also the DHW
request. •••
Flow / return connection kit for 35-135 "direct" installation:
piping for the "direct" connection to the secondary system
The kit is suitable for systems where no hydraulic separator is
required.
It contains both flow/return connections for the heating circuit
and return connection for DHW circuit.
•••
Expansion vessel kit for 50 stand alone boiler: 18 l expansion
vessel with pipes (¾" M connection) and connection brackets for
the installation inside the boiler casing. •
Cover for plate heat exchanger: painted metal sheet that
protects the plate heat exchanger in the "outdoor" installations.
The cover requires the support frame. •••
Cover for Safety kit/hydraulic separator for stand alone boiler:
painted metal sheet that protects both the safety manifold and
the hydraulic separator. •••
Frame kit for front cascades: it contains all the panels (and
screws) needed to install the boiler support frame (this kit can be
used for all Condexa PRO boiler range) . •••
2.3 Secondary circuit management
Secondary/tank probe: NTC probe for temperature control both
for the tank circuit and for the heating circuit.
Cable length: 2200 mm. •••
3-way valve kit for domestic hot water production 50:
3-way valve (1" M - kvs = 8.6) to be installed on the boiler return
(inside the casing).
The kit includes fittings, gaskets, servomotor and electric control
cable •
Electronic management kit for single direct or additional mixed
zone (max 16): kit for the management of additional heating
zone, direct or mixed.
It consists of an electronic control device completely wired to the
terminal board, installed on a DIN bar so that it can be installed in
a box in the electrical control panel in the central heating.
The electronic module is connected to the boiler board by means
of a communication bus and allows the management of the zone
with a dedicated climatic curve.
Feautures:
– Direct or mixed zone control
– Three way valve management
– Zone circulation pump control
– Input for TA or OT probe
•••

17
Condexa Pro
Image Description CONDEXA PRO
50 P 70 P 100 P
2.4 Flue system
Spacer kit for fixing to wall: frame kit to anchor and distance
the boiler from the wall. For Condexa PRO 35÷135 stand alone
installation.
The frame is necessary if you want to make the concentric
ejection directly to the back side, to the wall; in this case the
kit creates the necessary space for the concentric curve and the
insertion of the straight section.
This accessory also allows the boiler to be fixed in the presence of
irregular walls.
•••
2.5 Treatment systems for neutralising condensate
HN2 neutralizer kit up to 280 kW: HN2 type condensate neutraliser for
condensing gas boilers up to 270 kW.
The system allows to increase the pH of the condensate deriving from
the exhaust fumes of condensing boilers to values between 6.5 and 9 to
allow their disposal through the common sewer system.
The kit is suitable for those systems equipped with a condensate drain in
the thermal plant located higher than the condensate discharge of the
boiler.
The maximum head that the pump can win is given by its own maximum
head, less the resistance offered by the discharge pipe.
The pump is controlled by an electrical level contact. The electrical
connections have an IP54 electrical protection rating.
•••
N2 neutralizer kit up to 450 kW: N2 type condensate neutraliser for
condensing gas boilers up to 450 kW.
The system allows to increase the pH of the condensate deriving from
the exhaust fumes of condensing boilers to values between 6.5 and 9 to
allow their disposal through the common sewer system.
The kit is designed for systems equipped with a condensate drain trap
in the thermal plant located lower than the boiler condensate drain and
which therefore has a natural slope. Therefore, they do not require a
pump and relative electrical connections.
•••

18
CONDENSING GENERATORS
Wall-hung gas condensing modules
HYDRAULIC SYSTEM
Scheme 1: circuit with thermal module connected directly to the heating system (check that the pump head is sufficient to ensure adequate
circulation)
1. Globe valve
2. Non-return valve
3. Sanitary circulator
4. Expansion vessel
5. Safety valve
6. Discharge
7. Pressure gauge
8. Pressure switch
9. Softener filter
10. Pressure reducer
11. Tank
12. Automatic bleed valve
13. Three way valve
14. Circulator
SE External probe
F High temperature system flow
R High temperature system return
EAF Cold water inlet
UAC Domestic hot water outlet
Scheme 2: circuit with thermal module connected directly to the heating system and DHW tank (check that the pump head is sufficient to
ensure adequate circulation)
1. Globe valve
2. Non-return valve
3. Sanitary circulator
4. Expansion vessel
5. Safety valve
6. Discharge
7. Pressure gauge
8. Pressure switch
9. Softener filter
10. Pressure reducer
11. Tank
12. Automatic bleed valve
13. Three way valve
14. Circulator
SE External probe
F High temperature system flow
R High temperature system return
EAF Cold water inlet
UAC Domestic hot water outlet
10 9
E
AF
F
21
R
1
11
1
14
4
5
6
7
8
CONDEXAPRO
SE
5
UAC
1910 1
EAF
6
13
12
1
1
2
34
11
10 9
E
AF
F
21
R
1
11
1
4
5
6
7
8
CONDEXAPRO
SE
6
14

19
Condexa Pro
Scheme 3: circuit with thermal module connected to a heating system via a separator (in this case the boiler pump only serves to ensure
circulation in the primary)
1. Globe valve
2. Non-return valve
3. Sanitary circulator
4. Expansion vessel
5. Safety valve
6. Discharge
7. Pressure gauge
8. Pressure switch
9. Softener filter
10. Pressure reducer
11. Tank
12. Automatic bleed valve
13. Three way valve
14. Circulator
15. High-temperature system circulator
16. Tank circulator
SE External probe
F High temperature system flow
R High temperature system return
EAF Cold water inlet
UAC Domestic hot water outlet
Scheme 4: circuit with thermal module connected with DHW tank and with heating system by means of hydraulic separator
1. Globe valve
2. Non-return valve
3. Sanitary circulator
4. Expansion vessel
5. Safety valve
6. Discharge
7. Pressure gauge
8. Pressure switch
9. Softener filter
10. Pressure reducer
11. Tank
12. Automatic bleed valve
13. Three way valve
14. Circulator
15. High-temperature system circulator
16. Tank circulator
SE External probe
F High temperature system flow
R High temperature system return
EAF Cold water inlet
UAC Domestic hot water outlet
10 9
E
AF
F
211
R
1
11
1
15
4
5
6
7
8
CONDEXAPRO
SE
14
15
5
UAC
1910 1
EAF
6
12
1
1
2
34
11
10 9
EAF
F
211
R
1
11
1
4
5
6
7
8
CONDEXAPRO
SE
6
16
14

20
CONDENSING GENERATORS
Wall-hung gas condensing modules
Scheme 5: circuit with thermal module connected with heating system and DHW tank by means of hydraulic separator (the boiler pump
ensure only circulation in the primary).
1. Globe valve
2. Non-return valve
3. Sanitary circulator
4. Expansion vessel
5. Safety valve
6. Discharge
7. Pressure gauge
8. Pressure switch
9. Softener filter
10. Pressure reducer
11. Tank
12. Automatic bleed valve
13. Three way valve
14. Circulator
15. High-temperature system circulator
16. Tank circulator
SE External probe
F High temperature system flow
R High temperature system return
EAF Cold water inlet
UAC Domestic hot water outlet
Scheme 6: circuit with thermal module connected with heating system and DHW tank with collector (DHW and heating simoultaneous
production). System to be installed only with low head pumps.
1. Globe valve
2. Non-return valve
3. Sanitary circulator
4. Expansion vessel
5. Safety valve
6. Discharge
7. Pressure gauge
8. Pressure switch
9. Softener filter
10. Pressure reducer
11. Tank
12. Automatic bleed valve
13. Three way valve
14. Circulator
15. High-temperature system circulator
16. Tank circulator
SE External probe
F High temperature system flow
R High temperature system return
EAF Cold water inlet
UAC Domestic hot water outlet
Domestic hot water and central heating circuits must be completed with expansion vessels of adequate capacity and suitable,
correctly-sized safety valves.
The discharge of safety valves and appliances must be connected to a suitable collection and disposal system. The choice of
system components and the method of their installation are left up to the heating engineer installing the system. Installers
must use their expertise to ensure proper installation and functioning in conformity to all applicable legislation.
Special supply/refill water must be conditioned using suitable treatment systems. It is prohibited to operate the thermal
module without water.
15
5
UAC
1910 1
EAF
6
12
1
1
2
34
11
10 9
E
AF
F
211
R
1
11
1
4
5
6
7
8
CONDEXAPRO
SE
6
13
14
10 9
EAF
11
1
5
6
7
8
CONDEXAPRO
SE
F
R
2
1
1
2
15
1
1
2
16
1
4
12
5
6
5
UAC
1910 1
EAF
6
12
1
1
2
34
11
6
14