Wolf CGB-35/50 / CGB-75/100 DATA SHEET (Doc. no. 4800437 2018/07)

30m3/h

WOLF
GAS CONDENSING BOILERS

COMFORTLINE

CGB35/50 / CGB75/100

THE EXTENSIVE

EQUIPMENT RANGE

from system supplier WOLF oers the ideal solution for commercial and
industrial buildings, new build and modernisation projects alike.
The range of WOLF control units can meet any requirement for heating convenience.
All equipment is easy to operate, highly energy ecient and reliable.
Solar thermal systems can be swiftly integrated into existing systems.

WOLF equipment is easy and quick to install and maintain.

COMFORTLINE GAS CONDENSING BOILERS CGB 0405

CGB-35-50

CGB-K-40-35

CGB-75-100

SPECIFICATION

06

06

06

0708

STANDARD CONTROL UNIT 09

CONTROL ACCESSORIES

AIR/FLUE GAS ROUTING

ACCESSORIES

03

COMFORTLINE GAS CONDENSING BOILERS

1011

1213

1415

Wall mounted gas condensing boilers

with sealed combustion chamber,

for room sealed or open flue operation

Smart home capable

via smartphone, laptop or PC

via WLAN-Modul WOLF Link pro / ISM7e

High standard seasonal efficiency [to DIN]

up to 110% (net cv)/ 99% (gross cv) for

the best possible energy eciency

Meets the requirements for the "Blue Angel" eco-label

to RAL-UZ 61 when operated with natural gas

Premix burner for natural gas

E, LL and LPG, variable modulating

heating output from 8kW

Optimum utilisation of condensing technology

modulating pump control

no return temperature raising required

heating water heat exchanger can , at CGB35 / 50

For maintenance:

be pivoted out under system pressure

without draining the heating water

04

Easy flue gas emissions testing

from outside without opening the

appliance

WRS control system

can be set and controlled via smartphone or PC

BENEFITS OF WOLF

GAS CONDENSING BOILERS
FROM 35 TO 100 KW

CGB3550 / CGBK4035 / CGB75100

Convenient access to all components

for quick installation and straightforward
operation and maintenance

Cascadable up to 400 KW

Up to 4 gas condensing boilers can be combined using

a KM cascade controller.

05

COMFORTLINE GAS CONDENSING BOILERS

CGB-35, CGB-50

440

393

855

WALL MOUNTED GAS CONDENSING BOILER FOR HEATING

with option to connect a DHW cylinder
e.g. SE-2

- With modulating high eciency pump (EE <0.21) as standard; no
mechanical switches in the heating water

- Coated heating water heat exchanger WOLF "ALUPro”

MODULATION RANGE

for flow / return 50 / 30°C

CGB-35 from 9.0 to 35.0kW

CGB-50 from 12.2 to 50.0kW

CGB-K-40-35

WALL MOUNTED GAS CONDENSING BOILER FOR HEATING AND DHW

- With integral stainless steel DHW heat exchanger

- For demand-dependent, hygienic DHW heating

- Precise flow control ensures consistent draw-o temperature

- With modulating high eciency pump (EE <0.21) as standard;

no mechanical switches in the heating water

MODULATION RANGE

for flow / return 50 / 30°C

CGB-K-40-35 from 9.0 to 35.0kW

BOOSTER OUTPUT

for DHW heating

CGB-K-40-35 40.0kW

CGB-75, CGB-100

WALL MOUNTED GAS CONDENSING BOILER FOR HEATING

with option to connect a DHW cylinder
e.g. SE-2

- High performance heat exchanger made from a robust aluminium/silicon
alloy, with smooth, vertically arranged fins; easy cleaning, high self-cleaning
eect, long service life

- Flue gas non-return device as standard; lowest cool-down losses; cascade
operation with positive pressure possible for up to four wall mounted gas
condensing boilers and an output range up to 400kW

MODULATION RANGE

for flow / return 50 / 30°C

CGB-75 from 19.6 to 75.8kW

CGB-100 from 19.6 to 98.8kW

06

SPECIFICATION CGB 35 50 75 100

CGB-K - - - -

Energy eciency class, central heating

Energy eciency class, DHW heating

Rated heating output at 80/60°C kW 32 46 70.1 91.9 32/39

4)

A A A A

-

40-35

A

1)

Rated heating output at 50/30 °C kW 34.9 49.9 75.8 98.8 34.9
Rated heat input kW 33 47 71.5 94 33/40
Lowest heating output (modulating) at 80/60°C kW 8/8.5
Lowest heating output (modulating) at 50/30°C kW 9/9.5
Lowest heat input (modulating) kW 8.5/9

3)

3)

3)

11/11.7

12.2/12.9

11.7/12.4

3)

3)

3)

18.2 18.2 8/8.5

19.6 19.6 9/9.5

18.5 18.5 8.5/9

1)

3)

3)

3)

Heating flow outside diameter G 1¼" 1¼" 1½" 1½" 1¼"
Heating return outside diameter G 1¼" 1¼" 1½" 1½" 1¼"
DHW connection/DHW circulation G - - - - ¾"
Cold water connection G - - - - ¾"
Gas connection R ¾" ¾" ¾" ¾" ¾"
Air/flue pipe connection mm 80/125 80/125 110/160 110/160 80/125

Gas category

II2ELL3P

Gas supply details:

Nat. gas E/H (net cv = 9.5 kWh/m = 34.2 MJ/m 
Nat. gas LL (net cv = 8.6 kWh/m = 31.0 MJ/m) 
LPG (net cvi = 12.8 kWh/kg = 46.1 MJ/kg)

Supply pressure, natural gas (permissible min./max.)

)

m/h 3.84 5.5 8.6 11.11

kg/h 2.57 3.66 5.76 7.44

m/h 3.47 4.94 7.77 10.03

3.47/4.34

3.84/5.10

2.57/3.40

mbar 20 (18-25)

1)

1)

1)

Supply pressure, LPG (permissible min./max.) mbar 50 (43-57)

Standard seasonal eciency [to DIN] at 40/30°C (net cv/gross cv)
Standard seasonal eciency [to DIN] at 75/60°C (net cv/gross cv)
Eciency at rated load at 80/60°C (net cv/gross cv)
Eciency at 30% partial load and TR=30°C (net cv/gross cv)

% 109/98 110/99 109/98
% 108/97 107/96 106/96
% 98/88 97/88 98/88

% 109/98 109/98 107/96 107/96 107/97
Flow temperature, factory setting °C 75 75 80 80 75
Flow temperature up to approx. °C

90

Max. total pressure bar 3.0 3.0 6.0 6.0 3.0

Residual head for heating circuit:

1834 l/h flow rate (32kW at ∆t=20K) mbar 250 250 - - 250
1977 l/h flow rate (46kW at ∆t=20K) mbar - 235 - ­3000l/h flow rate (70kW at ∆t=20K) mbar - - 300 ­4000l/h flow rate (92kW at ∆t=20K) mbar - - - 80

Water capacity of heating water heat exchanger l 2.5 2.5 10 10 2.5
DHW flow rate l/min - - - - 2.0-12.0
Spec. water throughput "D" to EN 625 l/min - - - - 18
Min. flow pressure/min. flow pressure to EN 625 bar - - - - 0.2/1.0
Max. permiss. total pressure bar - - - - 10
DHW temperature range (adjustable)

4)

°C - - - - 15-65
Corrosion protection, DHW heat exchanger - - - - Stainless steel
Permiss. sensor temperatures °C
Flue gas mass flow rate at Qmax g/s 15 21.5 33.7 43.5 15/18

95

1)

Flue gas mass flow rate at Qmin g/s 3.9 5.3 8.9 8.9 3.9
Flue gas temperature 80/60-50/30 at Qmax °C 65-45 80-50 72-48 78-53 65-45
Flue gas temperature 80/60-50/30 at Qmin °C 66-47 60-38 60-36 60-36 66-47

Available gas fan draught at Qmax Pa 115 145 110 200 115/125

1)

Available gas fan draught at Qmin Pa 10 10 12 12 10
Flue gas category to DVGW G 635

G52
NOx class 6
Amount of condensate at 50/30°C l/h approx. 3.9 approx. 5.5 approx. 7.1 approx. 9.8
Condensate pH value

approx. 4.0

3.9/4.4

1)

Electrical connection V~/Hz 230/50
Integral fuse (medium time lag) A 3.15
Power consumption with heating circuit pump class A
Power consumption with 3-stage heating circuit pump
IP rating

W 110 150 - - 115
W 130 175 75 130 135

IP X4D
Total weight (empty) kg 45 45 92 92 48
CE designation CE-0085BP5571 CE-0085BR0164 CE-0085BP5571

1)

Heating operation/DHW operation 2) Does not apply to Austria/Switzerland 3) LPG

4)

Energy class according to Ecodesign Directive for central heating with thermal output ≤70kW

07

COMFORTLINE GAS CONDENSING BOILERS

DIMENSIONS AND CONNECTION DIMENSIONS

1

32

4

1

3672

4

CGB-35, 50

200

Condensate drain

CGB-75, 100

Gas connection R¾"

Heating return G1¼"

Gas connection R¾"

Heating flow G1¼"

Condensate drain

Heating return G1¼"

Heating flow G1¼"

CGB-K-40-35

Heating flow G1¼"

DHW connection G¾"

70

200

Condensate drain

Heating return G1¼"

Cold water connection G¾"

Gas connection R¾"

08

STANDARD CONTROL UNIT CGB (35/50), (75/100) / CGB-K (40/35)

8

3

7

4

6

5

9

1

8

3

7

4

6

5

°C

0 120

bar

04

2

13

Heating water

ON/OFF

Reset button

temperature selector

Thermometer

Illuminated ring for status display

Setting

Illuminated
ring

DHW temperature
selector

Pressure gauge

Display Meaning

Flashing green Standby (mains power supply ON; no heat demand)

Constant green light Heat demand: Pump running, burner OFF

Flashing yellow Emissions test mode

Constant yellow light Burner ON; flame steady

Flashing red Fault

DHW temperature selector

The settings 1-9 correspond to a cylinder temperature of 15-65°C. In combination with
an external temperature controller the adjustment at the DHW temperature selector is
without eect, the setting is then made at the external temperature controller.

Heating water temperature selector

The setting range 2-8 corresponds to a heating water temperature of 20-75°C. In
combination with an external temperature controller the adjustment at the heating
water temperature selector is without eect, the setting is then made at the external
temperature controller.

Winter mode (positions 2 to 8)
The circulation pump operates in heating mode.

Summer mode

Switch is set to

circulation pump OFF (central heating OFF); only DHW heating, frost
protection and pump anti-seizing function are enabled, i.e. the circulation pump runs for
approx. 30s every 24hours.

Emissions test mode

If the switch is turned to the

position, the boiler operates with the maximum heating
output. The illuminated ring flashes yellow for 15 minutes or until the maximum flow
temperature has been exceeded.

Thermometer/pressure gauge

The heating water temperature and the heating system water pressure are displayed.

09

COMFORTLINE GAS CONDENSING BOILERS

CONTROL ACCESSORIES CGB (35/50), (75/100) / CGB-K 40(/35)

Standard controller; part of the standard delivery of the gas condensing boiler

2-wire eBUS connection

BM programming unit (incl. outside

temp. sensor) as weather-compensated

temperature controller

• Room temperature-dependent/weather-compensated temperature control

• Time programs for central heating and DHW heating

• LCD with background illumination

• Plain text display with easy user prompts

• Operation via rotary selector with pushbutton function

• Four function keys for frequently used functions (central heating, DHW, setback, info)

• Installation either inside the boiler control unit, or as a remote control in a wall mounting base

• Option for MM mixer module

• Only one programming unit required for multi boiler systems

• Can be extended with MM mixer module (up to 7 heating circuits with mixer)

• Fault diagnosis

MM mixer module

• Extension module to control one circuit
with mixer

• Weather-compensated flow temperature
control

• Easy controller configuration by selecting
one of the preset system versions

• BM programming unit can be clipped into
the boiler or extended as a remote control
with wall mounting base

• Rast 5 connection technology

• Incl. flow temperature sensor

SM1-2 solar module

• Extension module to control one solar circuit incl. collector
temperature sensor, cylinder temperature sensor and sensor wells

• In conjunction with WOLF heat generators, greater energy savings
through intelligent cylinder reheating, i.e. blocking cylinder
reheating when there is sucient solar energy

• Heat metering with external heat meter

• Function check for flow rate and gravity brake

• Temperature dierential control for one heat consumer

• Maximum cylinder temperature limit

• Display of the set and actual values on the BM programming unit

• Integral hours run meter

• eBus interface with automatic energy management

• Rast 5 connection technology

BM programming unit

with wall mounting base (accessory)

as remote control

1 ... 7

SM2-2 solar module

• Extension module to control one solar thermal system

with up to 2 cylinders and 2collector arrays, incl. 1collector
sensor and 1 cylinder sensor, each with sensor well

• Easy controller configuration by selecting one of the

preset system versions

• In conjunction with WOLF heat generators, greater energy

savings through intelligent cylinder reheating, i.e. blocking
cylinder reheating when there is sucient solar energy

• Heat metering with external heat meter for all configurations

• Selection of cylinder operating mode

• Display of the set and actual values on the BM programming unit

• eBus interface with automatic energy management

• Rast 5 connection technology

10

CONTROL ACCESSORIES CGB (35/50), (75/100) / CGB-K 40(/35)

KM cascade module

• Extension module to control systems
with a low loss header or cascade operation

• Can be used for gas condensing boiler
control units (4 appliances)

• Easy controller configuration by selecting
one of the preset system versions

• Control of one circuit with mixer

• BM programming unit can be clipped into
the boiler or extended as a remote control
with wall mounting base

• 0-10 V input for BMS systems; fault message output 230V

• eBus interface with automatic energy management

• Rast 5 connection technology

External wireless sensor

(only in conjunction with receiver
for external wireless sensor and
remote control, part no. 27 44 209)

2-wire eBUS connection

WOLF

portal server

Wireless receiver for external wireless sensor and wireless remote control

incl. radio clock (DCF77 signal)

Wireless remote control

(only in conjunction with receiver for
external wireless sensor and remote control)
Max. one wireless remote control per circuit with mixer.

ISM7e / WOLF Link pro

Local (home) network

The ISM7e / WOLFLinkpro interface
module allows remote access to WOLF
heating systems, both via the internet
and in local networks using a PC or
smartphone.

DSL router

(LAN / WLAN)

WLAN

LAN / WLAN

LAN / WLAN

LAN

11

COMFORTLINE GAS CONDENSING BOILERS

ISM7e / WOLF Link pro

interface module

eBus

AIR/FLUE GAS ROUTING FOR WALL MOUNTED GAS CONDENSING BOILERS

B23
B33

C53 C93x C43x C83x

C53x

C33x

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C33x C43x

C53x C93x C33x B33

C13x

FROM 35 KW TO 50KW

Design variants Maximum length

Type CGB-35

Flue inside a shaft and combustion air directly via the boiler

B23

(open flue)

Flue inside a shaft with horizontal concentric connection pipe

B33

(open flue)

Connection to a moisture-resistant flue gas chimney with

B33

a horizontal concentric connection pipe (open flue)

C13x Horizontal roof outlet through a pitched roof (room sealed) 16 16 8

Vertical concentric roof outlet through pitched or flat roof, vertical

C33x

concentric balanced flue system for installation in a shaft (room sealed)

Connection to a moisture-resistant balanced flue chimney, maximum

C43x

pipe length from centre of boiler bend to connection 2m (room sealed)

Connection to flue in a shaft and ventilation air supply through external wall

C53

(room sealed), incl. 3m supply air pipe

Connection to flue routed over an external wall; combustion air intake

C53x

via external wall panel (room sealed)

Connection to flue in a shaft and ventilation air through external wall

C53x

(room sealed)

Concentric connection to moisture-resistant flue gas chimney

C83x

and combustion air through external wall (room sealed)

Flue for installation in a shaft; rigid or flexible

C93x

1)

with horizontal concentric connection line

The maximum length refers to the total length from the appliance to the flue terminal

Note: System C33x is also suitable for installation in garages.

Where necessary, adapt the installation examples to the relevant building
regulations and requirements in your country/region. Any questions relating
to the installation of inspection sections and vents should be discussed with
the local flue gas inspector.

The specified lengths refer to concentric balanced flues and standard
flues, and apply to original WOLF components only.

Please observe the maximum length of the horizontal flue in accordance
with the boiler installation instructions.

The following balanced flues or standard flues with
CE-0036-CPD-9169003 certification may be used:

- Flue DN80

- Concentric balanced flue DN

- Flue DN110

- Concentric balanced flue (on an external wall) DN 80/125

- Flexible flue DN83

- Flexible flue DN110
WOLF accessories are supplied with the necessary identification

labels. Please also observe the installation information supplied
with the accessories.

12

DN80 39 39 23

DN110 50 50 50

DN80 35 35 16

DN110 50 50 50

(balanced flue manufacturer)

DN80/125 16 16 8

DN110/160 42 42 37

(balanced flue manufacturer)

DN80 38 38 19

DN110 50 50 50

DN80/125 38 38 19

DN110/160 50 50 50

DN80 38 38 19

DN110 50 50 50

(balanced flue manufacturer)

DN80 25 25 15

DN110 43 43 41

80/125

CGB-K-40-35

Calculation to EN 13384

Calculation to EN 13384

Calculation to EN 13384

1)

[m]

CGB-50

AIR/FLUE GAS ROUTING FOR WALL MOUNTED GAS CONDENSING BOILERS

B23
B33

C53 C93x C43x C83x

C53x

C33x

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C33x C43x

C53x C93x B33

C13x

FROM 75KW TO 100KW

Design variants Maximum length

1)

Type CGB-75 CGB-100

Flue inside a shaft and combustion air directly via the boiler

B23

(open flue)
Flue inside a shaft with horizontal concentric connection pipe

B33

(open flue)

Connection to a moisture-resistant flue gas chimney with

B33

a horizontal concentric connection pipe (open flue)
Horizontal roof outlet through pitched roof

C13x

(room sealed
Vertical concentric roof outlet through a pitched

C33x

or flat roof (room sealed)
Connection to a moisture-resistant balanced flue chimney, maximum

C43x

pipe length from centre of boiler bend to connection 2m (room sealed)

Connection to flue in a shaft and ventilation air supply through external wall

C53

(room sealed), incl. 3m supply air pipe

Connection to flue routed over an external wall; combustion

C53x

air intake via external wall panel (room sealed)

Connection to flue in a shaft and ventilation

C53x

air through external wall (room sealed)

Concentric connection to moisture-resistant flue gas chimney and

C83x

combustion air through external wall (room sealed)

Vertical flue for installation in a shaft, rigid or flexible,

C93x

1)

2)

with horizontal concentric connection line

The maximum length refers to the total length from the appliance to the flue terminal

Enlargement in a shaft from DN110 to DN160

– on-site dormer

)

Note: Systems C33x and C83x are also suitable for installation in garages.

Where necessary, adapt the installation examples to the relevant building
regulations and requirements in your country/region. Any questions
relating to installation, particularly regarding inspection sections and vents
(ventilation generally required above 50kW output) should be discussed in
advance with the local flue gas inspector.

The specified lengths refer to concentric balanced flues and standard
flues, and apply to original WOLF components only.

Please observe the maximum length of the horizontal flue in accordance
with the boiler installation instructions.

13

DN110 to DN160

DN110 to DN 160

DN110 to DN

The following balanced flues or standard flues with
CE-0036-CPD-9169003 certification may be used:

- Flue DN110, 160 and 200

-

Concentric balanced flue DN110/160, DN160/225 and DN200/300

- Concentric balanced flue (on an external wall) DN110/160

- Flexible flue DN110
WOLF accessories are supplied with the necessary identification labels.

Please also observe the installation information supplied with the
accessories.

COMFORTLINE GAS CONDENSING BOILERS

DN110 44 46

DN100

35 37
50 50

Calculation to EN 13384

(balanced flue manufacturer)

DN110/160 10 10

DN110/160 12 14

Calculation to EN 13384

(balanced flue manufacturer)

DN110 41 44

2)

50 50

DN110 39 40

DN110 36 38

2)

160

50 50

Calculation to EN 13384

(balanced flue manufacturer)

DN110 19 21

DN110 to 160

2)

31 31

[m]

COMFORTLINE WALL MOUNTED GAS CONDENSING BOILERS
ACCESSORIES

CGB Wall mounted gas condensing boiler for central heating with option to connect a DHW cylinder

CGB-K Wall mounted gas condensing boiler for DHW and central heating

Tested in accordance with EC Directives and EN483 for heating systems to EN12828 with flow temperatures up to 90°C and 3bar
permissible operating pressure. Suitable for modulating operation down to room temperature; modulating output control; automatic
matching of the air ratio to the room sealed flue system; premix burner; equipped and adjusted in the factory for natural gas E, LL or
LPG; sealed combustion chamber for open flue and room sealed operation.

Control unit with gas burner control unit, electronic ignition and ionisation flame monitor; variable speed fan.

White RAL 9016 powder-coated casing.

Accessories

Control accessories

BM programming unit

Wall mounting base

AFB analogue remote control

MM mixer module

SM1-2 solar module

SM2-2 solar module

KM cascade module

Heat meter set for capturing solar yield

Wireless outside temperature sensor
(wireless receiver required)

Wireless remote control (wireless receiver required)

CGB-

35/50/75/100

CGB-K-

40-35

Wireless receiver incl. radio clock (also required for wireless
outside temperature sensor and wireless remote control)

ISM7e / WOLF Link Pro interface module

Hydraulic accessories and gas supply accessories

Gas ball valve (angle or straight-through version),
chrome plated, with thermally activated shut-o valve

Safety valve Rp ½" up to 3bar, chrome plated

Drain outlet kit R1" with trap and bezel, grey plastic

Accessories for surface mounting

● Included in standard delivery
○ Available accessory

14

COMFORTLINE WALL MOUNTED GAS CONDENSING BOILERS

ACCESSORIES

Accessories

Heating circuit connection set

Low loss header set with complete pipework and
thermal insulation for 1 or 2 appliances

DHW circulation accessories

DHW circulation set to EnEV incl. DHW circulation pump with
analogue time switch

DHW circulation set to EnEV incl. DHW circulation pump with
digital time switch

Other accessories

Pipe cladding

Balanced flue accessories

Concentric balanced flue

External wall system

CGB-

35/50/75/100

only for CGB-75/100

CGB-K-

40-35

Flue system connection set for flues in a shaft

● Included in standard delivery
○ Available accessory

15

15

COMFORTLINE GAS CONDENSING BOILERS

Dealer address

WOLF GMBH / P.O. BOX 1380 / D84048 MAINBURG / TEL. [phone]0 / FAX [phone]1600 / www.WOLF.eu

Doc. no. 4800437 2018/07