Protherm Gepard Series Installation guide

Training Manual FT 55
All the technical strengths,
installation and maintenance:
Gepard, Panther .

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Technical Notebook ..............................................................
Technical Training
Presentation of the range
This product range exists in different versions:
- Open flue or fan flue boilers
- Combi or system boilers
The different models:
• Gepard (Combi)
Open Flue Fan Flue
Models Gepard 23 MOV Gepard 23 MTV
Heating output 23,3 kW 23,3 kW
DHW output 23,3 kW 23,3 kW
• Panther (Combi)
Open Flue Fan Flue
Models Panther 25 KOV Panther 25 KTV Panther 30 KTV
Heating output 24,6 kW 24,6 kW 29,6 kW
DHW output 24,6 kW 24,6 kW 29,6 kW
• Panther (System)
Open Flue Fan Flue
Models Panther 12 KOO Panther 25 KOO Panther 12 KTO Panther 25 KTO
Heating output 12,4 kW 24,6 kW 12,6 kW 24,6 kW
DHW output - - - -
Gepard / Panther 23 MOV :
Gepard / Panther = range name
23 = nominal output
MOV : M or K = family of boiler
MOV : O or T = Open ue (O) or Fan ue (T)
MOV : O or V = System (O) or Combi (V)

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Technical Notebook ..............................................................
Technical Training
General presentation of the open flue appliances.
All the models of the range have a common structure.
- The hydraulic unit (circulator rating, number of plates in the hot water heat exchanger, expansion tank capacity, etc)
- Control panel
The structure of open flue versions:
Draught diverter
Heat exchanger
Chambre de combustion
Hydraulic bloc
Gas valve
Electrical box
Smoke outlet
Over-ow safety device
Burner
Plate heat exchanger
Pump
360
450
Ø46
807
230
225
311
410
742
179
205
Ø125
311
410
Ø41
742
184
205
311
410
Ø36
742
158
175
(Ø43)
Gepard 23 MOV
Panther 25 KOV
Panther 12 / 25 KOO

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Technical Notebook ..............................................................
Technical Training
General presentation of the fan flue appliances
The structure of fan flue versions
Fan
Heat exchanger
Combustion chamber
Hydraulic bloc
Gas valve
Electrical box
Smoke outlet
Air ow switch
Burner
Plate heat exchanger
Pump
This picture is for Panther.
The Gepard is quite different on the
top part : the air ow switch is on
left side.
360
450
Ø46
807
230
225
311
410
742
179
205
Ø125
311
410
Ø41
742
184
205
311
410
Ø36
742
158
175
(Ø43)
Panther 12 KTO
360
450
Ø46
807
230
225
311
410
742
179
205
Ø125
311
410
Ø41
742
184
205
311
410
Ø36
742
158
175
(Ø43)
360
450
Ø46
807
230
225
311
410
742
179
205
Ø125
311
410
Ø41
742
184
205
311
410
Ø36
742
158
175
(Ø43)
Panther 30 KTV Panther 25 KTV,
25 KTO

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Technical Notebook ..............................................................
Technical Training
Hydraulic description of open flue appliances :
1 Pressure relief valve (3 bar)
2 Gas valve
3 Primary lter
4 Igniter
5 Burner
6 Heating ow temperature sensor
7 Ignition electrode
8 Combustion chamber
9 Heat exchanger
10 Draught diverter
11 Over ow safety device
12 Expansion vessel
13 Flame control electrode
14 Heating return temperature sensor
15 Pump air vent
16 Pump
17 Pressure sensor
18 By-pass
19 3-way valve
20 Plate heat exchanger
21 Cold water ow detector
22 Cold water lter
23 Filling loop assembly
24 Drain cock
A Heating ow
B Hot water outlet
C Gas inlet
D Cold water inlet
E Heating return
F Drain pipe
18
10
9
8
6
5
4
2
1
11
14
17
16
15
19
23
24
7
13
12
3
20
21
22

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Technical Notebook ..............................................................
Technical Training
Hydraulic description of fan flue appliances :
12
13
10
11
9
8
7
6
5
4
2
3
1
15
14
16
18
17
26
19
21
25
20
22
23
24
1 Pressure relief valve (3 bar)
2 Gas valve
3 Primary lter
4 Igniter
5 Burner
6 Heating ow temperature sensor
7 Ignition electrode
8 Combustion chamber
9 Heat exchanger
10 Sealed chamber
11 Air ow switch
12 Fan
13 Flue system
14 Expansion vessel
15 Flame control electrode
16 Heating return temperature sensor
17 Pump air vent
18 Pump
19 Pressure sensor
20 By-pass
21 3-way valve
22 Plate heat exchanger
23 Cold water ow detector
24 Cold water lter
25 Filling loop assembly
26 Drain cock
A Heating ow
B Hot water outlet
C Gas inlet
D Cold water inlet
E Heating return
F Drain pipe

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Technical Notebook ..............................................................
Technical Training
Hydraulic operation of Combi versions
Hydraulic diagram in heating
Hydraulic diagram in hot water

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Technical Notebook ..............................................................
Technical Training
Hydraulic description of system (open-flue) appliances :
8
7
5
4
3
2
1
16
18
19
612
11
13
15
14
17
910
1 Pressure relief valve (3 bar)
2 Gas valve
3 Igniter
4 Burner
5 Heating ow temperature sensor
6 Ignition electrode
7 Combustion chamber
8 Heat exchanger
9 Draught diverter
10 Overow safety device
11 Expansion vessel
12 Flame control electrode
13 Heating return temperature sensor
14 Pump air vent
15 Pump
16 Pressure sensor
17 By-pass
18 3-way valve
19 Drain cock
A Heating ow
B To cylinder coil or not connected
C Gas inlet
D From cylinder coil or not connected
E Heating return
F Drain pipe

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Technical Notebook ..............................................................
Technical Training
Hydraulic description of system (fan-flue) appliances :
9
11
10
8
7
5
4
3
2
1
18
20
21
6
12
14
13
15
17
16
19
1 Pressure relief valve (3 bar)
2 Gas valve
3 Igniter
4 Burner
5 Heating ow temperature sensor
6 Ignition electrode
7 Combustion chamber
8 Heat exchanger
9 Sealed chamber
10 Air ow switch
11 Fan
12 Flue system
13 Expansion vessel
14 Flame control electrode
15 Heating return temperature sensor
16 Pump air vent
17 Pump
18 Pressure sensor
19 By-pass
20 3-way valve
21 Drain cock
A Heating ow
B To cylinder coil or not connected
C Gas inlet
D From cylinder coil or not connected
E Heating return
F Drain pipe

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Technical Notebook ..............................................................
Technical Training
Hydraulic operation of System Boiler
Hydraulic diagram in hot water

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Technical Notebook ..............................................................
Technical Training
Technical characteristics
Gepard Panther
Units 23
MOV 23 MTV 12 KOO 12 KTO 25 KOO 25 KOV 25 KTO 25 KTV 30 KTV
Type of appliance
open
ue fan ue open ue fan ue open ue
open
ue fan ue fan ue fan ue
All open ue appliances : B11BS
All fan ue appliances : C12, C32, C42, C52, C62, C82, B22
Heating
Minimum caloric rate (Qmin) kW 10,4 10,7 4,2 4,4 9,9 9,9 10,6 10,6 12,2
Maximum caloric rate (Qmax) kW 25,8 25,0 13,8 13,8 26,8 26,8 26,5 26,5 32,5
Min. heating output at 80°C/60°C (Pmin) kW 9,0 8,5 3.4 3,5 8.4 8.4 8.9 8.9 10,4
Max. heating output at 80°C/60°C (Pmax) kW 23,3 23,3 12,4 12.6 24.6 24.6 24,6 24.6 29,6
Factory preset heating output kW 12.6
H.I. efciency at 80 °C/60 °C, min. power % 86,5 79,4 81,0 79,5 84,8 84,8 84 84,0 85,2
H.I. efciency at 80 °C/60 °C, max. power % 90,3 93,2 92,6 91,5 91,8 91,8 93,8 92,8 91,1
Minimum heating ow rate l/h 400 400 200 200 400 400 400 400 400
Minimum ow rate with ΔT 20 K l/h 1000 1000 530 530 1050 1270 1050 1050 1270
Min. heating output temperature °C 38 38 38 38 38 38 38 38 38
Max. heating output temperature °C 80 80 80 80 80 80 80 80 80
Expansion tank, useable capacity l 5 5 7 7 7 7 7 7 8
Expansion tank pre-ination pressure bar 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75
Safety valve, maximum operating pressure
(PMS) bar333333333
Domestic hot water
Min. DHW output kW 9,0 8,5 - - - 8.4 - 8.9 10,4
Max. DHW output kW 23,3 23,3 - - - 24.6 - 24.6 29,6
Min. caloric rate (Q min) kW 10,4 10,7 - - - 9,9 - 10,6 12,2
Maximum caloric rate (Q max.) kW 25,8 25,0 - - - 26,8 - 26,5 32,5
Min. domestic hot water temperature °C 38 38 - - - 38 - 38 38
Max. domestic hot water temperature °C 60 60 - - - 60 - 60 60
Specic ow rate for ΔT = 30 K l/min 11,1 11,1 - - - 11,3 - 11,3 14
Warmstart function without with without with
Ignition ow rate l/min 1.5 1.5 - - - 1.5 - 1.5 1.5
Cold water ow restrictor (colour) l/min 10
(blue)
10
(blue) ---10 (blue) -10 (blue) 12 (red)
Min. supply pressure bar 0.3 0.3 - - - 0.3 - 0.3 0.3
Recommended supply pressure bar 2 2 - - - 2 - 2 2
Maximum inlet pressure bar 10 10 - - - 10 - 10 10

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Technical Notebook ..............................................................
Technical Training
Technical characteristics
Gepard Panther Panther
Units 23 MOV 23 MTV 12 KOO 12 KTO 25 KOO 25 KOV 25 KTO 25 KTV 30 KTV
Electrical
Supply voltage V 230 230 230 230 230 230 230 230 230
Maximum absorbed power W 92,0 127,0 92,0 117,0 92,0 92,0 147,0 147,0 152,0
Current A 0,4 0,55 0,4 0,51 0,4 0,4 0,64 0,64 0,66
Fuse A
Electrical protection IPX4D IPX4D IPX4D IPX4D IPX4D IPX4D IPX4D IPX4D IPX4D
Electrical class
Class I = equipment having a device allowing the earthing of accessible metallic parts
Gas category ll2HM3+ ll2HM3+ ll2HM3+ ll2HM3+ ll2HM3+ ll2HM3+ ll2HM3+ ll2HM3+ ll2HM3+
Gas characteristics
Number of injectors 14 13 17 17
Natural gas G 20 (*) - 20 mb
Restrictor Ø mm 5,65 6,1 4,4 4,65 6,1 6,1 5,8 5,8 6,9
Injector Ø mm 1,20 1,20 1,25 1,25 1,20 1,20 1,20 1,20 1,20
Maximum gas ow rate m3/h 2,73 2,64 1,47 1,46 2,84 2,84 2,84 2,8 3,44
Minimum gas ow rate m3/h 1,1 1,15 0,45 0,45 1,05 1,05 1,05 1,12 1,29
Maximum burner pressure mbar /
mm WC
12,0 /
122,4
13,0 /
132,6
14,5 /
147,9
14,5 /
147,9
13 /
132,6
13,0 /
132,6
13,0 /
132,6
12,4 /
126,4
13,0 /
132,6
Minimum burner pressure mbar /
mm WC
2,2 /
22,4
2,5 /
25,5
1,65 /
16,8
1,65 /
16,8
2,1 /
21,4
2,1 /
21,4
2,1 /
21,4
1,9 /
19,4
1,7 /
17,3
Natural gas G 30/G31 (*) - 37 mb Only by gas conversion kit
Restritor Ø mm 4,8 4,8 - 4,65 5,2 5,2 5,95 5,95 7,3
Injector Ø mm 0,73 0,77 0,73 0,7 0,7 0,7 0,73 0,73 0,73
Maximum gas ow rate m3/h kg/h 1,034 1,016 0,46
0,91
0,5
0,9 2.1 2.1 2,05 2,05 2,52
Minimum gas ow rate m3/h kg/h 0,417 0,433 0,18
0,36
0,2
0,4 0,8 0,8 0,82 0,82 0,95
Maximum burner pressure mbar 29,6 28,0 36,7 36 31,3 31,3 32,7 32,7 35,5
Minimum burner pressure mbar 5,2 5,2 5,8 6,2 4,6 4,6 5,0 5,0 4,8
(*) ref. 15 °C – 1013 mbar dry gas

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Technical Notebook ..............................................................
Technical Training
Control panel Panther / Panther
1 Domestic hot water circuit temperature control
2 Display
3 Reset button
4 Start/stop button
5 Heating circuit water temperature control
6 Working mode selection
1 Temperature of the domestic hot water circuit
2 Fault symbols
3 Heating circuit pressure
4 Burner on indicator
5 Heating circuit temperature
The “ECO» sign appears when the hot water setting is less than 50°C (indipendent if the heat exchanger preheating is active or
deactivated).
2
1
3
4
5
ECO
3
2
1
4
5
6

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Technical Notebook ..............................................................
Technical Training
Control panel Gepard
1 Reset button
2 Working mode selection
3 Display
4 Start/stop button
5 Heating and hot water temperature setting
1 Heating symbol
2 Holiday symbol
3 Domestic hot water symbol
4 Display of pressure or temperature
5 Measurement units
6 Burner on indicator
6
5
4
2
1
3
3
2
1
4
5

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Technical Notebook ..............................................................
Technical Training
Safety devices for open ue boilers
Temperature safety
(ant-freezing / overheating)
Gas safety valve
(EVS)
Smoke overow
Flame control
3-way valve
anti-blockage
Water pressure sensor
Safety Control device Values Action
Safety devices locking the appliance and requiring a RESET in the case of a fault
Overheating and
temperature limiting
Outgoing/return
heating NTC
97 °C => max. temperature Fault displayed F20
T° increase more than 10 K/S. Fault displayed F24
ΔT (outlet - return) > 35 K Fault displayed F23
Flame control Ignition and ionisation
electrode
Up to 2 spark sequences separated
by 7 seconds
Fault F28 if no ignition
Fault F29 if burner goes out
Gas Gas safety valve 0V when shut down
24V then 16V in operation
Display of various faults depending
on origin
Smoke overow ON / OFF thermostat 23 and 25 kW appliances : contact
opens at 65°C
12 kW appliances : contact opens at
60°C.
Fault displayed F25
Safety devices not requiring a RESET after the fault clears
Antifreeze Outlet NTC 7 °C --> immediate heating Burner lit up to 35°C
Pump anti-blocking Internal computer Activated for 30s if not activated for
24 hours
Activation without apparent demand
3-way valve
anti-blockage
Activated for 30s if not activated for
24 hours
Activation without apparent demand
Heating pressure Pressure sensor Triggered at 0.5 bar
Reset at 0.3 bar
Display below 0.3 bar
display blinking between 0.3 and 0.5 bar
Heating valve Opens at 3 bar Evacuation of excess pressure
(display blinking below 2.5 bar)
Pressure relief valve
(3 bar)
Pump anti-block

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Technical Notebook ..............................................................
Technical Training
Safety devices for fan ue boilers
Safety Control device Values Action
Safety devices locking the appliance and requiring a RESET in the case of a fault
Overheating and
temperature limiting
Outgoing/return
heating NTC
97 °C => max. temperature Fault displayed F20
T° increase more than 10 K/S. Fault displayed F24
ΔT (outlet - return) > 35 K Fault displayed F23
Flame control Ignition and
ionisation
electrode
Up to 3 spark sequences separated by 7
seconds
Fault F28 if no ignition
Fault F29 if burner goes out
Gas Gas safety valve 0V when shut down
24V then 16V in operation
Display of various faults depending
on origin
Air ow Air ow switch 12 kW -> at 25°C : ON 13 Pa, OFF 10 Pa
23 kW -> at 25°C : ON 71 Pa, OFF 46 Pa
25 kW -> at 25°C : ON 80 Pa, OFF 68 Pa
30 kW -> at 25°C : ON 59 Pa, OFF 51 Pa
On = contact closed
Off = contact opened
Fault displayed F33
Safety devices not requiring a RESET after the fault clears
Antifreeze Outlet NTC 7 °C --> immediate heating Burner lit up to 35°C
Pump anti-blocking Internal computer Activated for 30s if not activated for 24
hours
Activation without apparent demand
3-way valve
anti-blockage
Activated for 30s if not activated for 24
hours
Activation without apparent demand
Heating pressure Pressure sensor Triggered at 0.5 bar
Reset at 0.3 bar
Display below 0.3 bar
display blinking between 0.3 and 0.5 bar
Heating valve Opens at 3 bar Evacuation of excess pressure
(display blinking below 2.5 bar)
Temperature safety
(ant-freezing / overheating)
Gas safety valve
(EVS)
Air ow switch
Flame control
3-way valve
anti-blockage
Water pressure sensor
Pressure relief valve
(3 bar)
Pump anti-block

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Technical Notebook ..............................................................
Technical Training
Hydraulic unit
Heating pressure valve
Plate heat exchanger* Automatic air vent
2 speed
pump
By-pass
3-way valve motor
Screw giving access
to the motor shaft for
unblocking
Gas valve
Cold water inlet
ow sensor*
* not for system versions
Filling cock*

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Technical Notebook ..............................................................
Technical Training
Pump bloc / dhw ow detector bloc :
Sub-assembly Components Connections
The pump unit is made up
of :
- The automatic bleed valve (1)
- The pump turbine section (2)
- The 3-way valve (heating / hot water) (3)
- The heating by-pass (4)
- The pump suction connector (A)
- The pump outlet connector (B)
The ow detector unit is
made up of :
- The turbine ow detector (5), tted with a
lter
- The pressure sensor (6)
- The plate heat exchanger connections (C)
- The by-pass connections to heating (D)
- The cold water inlet (E)
- The tapping for the lling loop of the heating circuit (F).
The ow detector connects to the pump unit.
To fully understand how this assembly is made up, see the drawings / photos below :
1B
A
3
2
C
F
5
6
4
E
D
The ow detector (5): Its
turbine, its lter.
The two assembled units
(ow detector / pump):
3-way valve
Bypass
Pressure
sensor

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Technical Notebook ..............................................................
Technical Training
Combustion unit :
This picture is for Panther.
For Gepard, the air ow switch is
on the left side of the fan, but the
way of working is the same.
For open ue version, the
Draught diverter is equipped with
a thermostat to protect against
smoke over-ow
Air ow switch
Smoke over ow thermostat

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Technical Notebook ..............................................................
Technical Training
E-box :
The control panel contains the main board, the display card, the terminals (for electrical accessory connections, electric power supply,
etc).
The control panel closed. (Here the display shows the
Gepard/Panther)
The control panel tted with a thermal screen on the
vented versions to protect it from the radiation.
24 Volt connection hatch open.
The right-hand hatch gives access to the 230 Volt
connections.