CTC Giersch RG20 Manual

Technical Information • Installation Instructions
Gas
Issued August 2019
Right reserved to effect technical changes
in the interest of product improvement !
RG20 / RG30
GB

2
E.04.99 • G. 08.08.19
Overview ........................................................................................................... 3
General information / safety information .................................................................................... 3
Checking scope of delivery and connection data....................................................................... 3
Operating instructions ................................................................................................................ 3
Instruction of operating personnel.............................................................................................. 3
Maintenance and customer service ........................................................................................... 3
Key for code designation ........................................................................................................... 4
Technical specifications ............................................................................................................. 4
Installation ......................................................................................................... 5
Installing flange and burner........................................................................................................ 5
Checking electrode setting......................................................................................................... 5
Installing gas assembly.............................................................................................................. 5
Establishing electrical connections ............................................................................................ 6
Function ............................................................................................................. 7
Control unit LME ........................................................................................................................ 7
Air flow setting, dimension “A”.................................................................................................... 10
Air flap positioning motor .......................................................................................................... 10
Compact gas unit ...................................................................................................................... 12
Gas pressure monitor ................................................................................................................ 12
Start-up .............................................................................................................. 13
Adjustment tables RG20 ............................................................................................................ 13
Adjustment tables RG30 ........................................................................................................... 15
Adjusting gas burner and boiler ................................................................................................. 17
Calculation principle for gas burner adjustment ......................................................................... 21
Design ............................................................................................................... 23
Exploded drawing and spare parts/parts list RG20.................................................................... 23
Exploded drawing and spare parts/parts list RG30.................................................................... 25
Service instructions/dimensions ........................................................................ 27
Service position.......................................................................................................................... 27
Reference dimensions, ignition and ionisation electrodes ........................................................ 27
Measuring ionisation current ..................................................................................................... 28
Servicing air pressure monitor .................................................................................................. 29
Declaration of conformity ........................................................................................................... 30
Burner overall dimensions / boiler connection dimensions ........................................................ 32
Working ranges .......................................................................................................................... 32

3
E. 04.99• G.08.08.19
Overview
Overview
General information / safety information
The installation of a gas-fired system must conform to extensive regulations and requirements. It is there-
fore the duty of the installer to be familiar with all applicable regulations and requirements. Installation, start-
up and maintenance must be performed with utmost care.
The burner must not be operated in rooms with high levels of air humidity (laundry rooms), dust or corrosive
vapours. The boiler room must be ventilated accordingly with ventilation air.
The GIERSCH RG20 / RG30 Series gas burners are suitable for burning natural gas or liquefied petroleum
gas and comply with the European standard DIN EN 676.
Caution !
Improper installation, adjustment, modification, operation or maintenance may result in physical
injury or damage to property/equipment.
Read the instructions prior to use.
This product must be installed in conformity with the valid regulations (e. g. DIN-VDE, DIN-DVGW).
The design and degree of protection of the burner make it suitable for operation in enclosed rooms.
Checking scope of delivery and connection data
Before installing the GIERSCH gas burner, please check that all items included in the scope of delivery are
present.
Scope of delivery:
Burner, sliding flange and gasket, 4 retaining screws, separate operating instructions, technical informati-
on, one 7-pin and one 4-pin connector (for -Z and -M only).
Compact gas unit and gaskets (for KEV only: additionally blue hoses for furnace and air pressure connec-
tions, see Overview, Page 12).
The gas pipe must be designed to conform to the flow rate and the available gas flow pressure and routed
with the lowest pressure loss over the shortest distance to the burner. The loss of gas pressure via the com-
pact unit and the burner and the resistance on the fuel gas side of the heat generator must be less than
the connection flow pressure.
Caution !
Observe throughflow direction of compact unit.
Operating instructions
The operating instructions together with this technical information leaflet must be displayed in a clearly vi-
sible position in the boiler room. It is essential to write the address of the nearest customer service centre
in the operating instructions.
Instruction of operating personnel
Faults are often caused by operator error. The operating personnel must be properly instructed in how the
burner works. In the event of recurring faults, Customer Service should be notified.
Maintenance and customer service
The complete system should be checked once a year for correct functioning and leaks by a representative
of the manufacturer or other suitably qualified person.
We accept no liability for consequential damage in cases of incorrect installation or repair, the fit-
ting of non-genuine parts or where the equipment has been used for purposes for which it was
not intended.

4
E.04.99 • G. 08.08.19
Overview
Key for code designation
Technical specifications
Burner type
Technical data RG20-N
(-F)
RG20-L
-N(-F)
RG20-Z
-L-N(-F)
RG20
-M-L-N
RG30-N
(-F)
RG30-Z
-L-N(-F)
RG30
-M-L-N(-F)
Min. burner output in kW 40 105
Max. burner output in kW 120 260
Gas type for natural gas LL + E = “-N” / LPG 3B/P = “-F”
Method of operation 1-stage 2-stage
sliding
modulating 1-stage 2-stage
sliding
modulating
Voltage 1 / N / PE ~50 Hz - 230 V
Max. current consumption
Max. start / operation 1.48A/0.75A 1.35A/0.72A 3 A/1.4 A 3.1 A/1.5 A
Electric motor power
(at 2850 rpm
-1
) in kW
0.14 0.25
Flame failure controller Ionisation electrode
Control box LME11 LME22 LME11 LME22
Weight in kg 26 29 38 40
Noise emission in db(A) ≤ 72 ≤ 75
RG 20-Z(M)-L-N(F)
Natural gas LL+E ="-N" or LPG ="-F"
air damper
2 stage (modulating)
burner type
burner series

5
E. 04.99• G.08.08.19
Installation
Installation
Installing flange and burner
When installing the sliding flange, only tighten screws
1 and 2 otherwise it will not be possible to secure the
burner pipe with screw 3. Slide in the burner, adjust to
furnace depth and tighten the screws in the following
sequence: 3, 4, 5, raising the housing in the process.
Important: Secure the sliding flange so that the clam-
ping screw 3 is positioned at the top.
Checking electrode setting
• Move the burner into the service position as
described on Page 27.
• Check the setting of the ignition and ionisation
electrodes (see Page 27).
Installing gas assembly
• Remove plastic protective plug.
• Install unions including accompanying seals.
• Observe installation position.
• Check connecting point of gas assembly with
noncorrosive foaming agent for leaks and vent gas
pipe.
• When venting gas, discharge safely to atmosphere
with a hose.
Comply with DVGW-TRGI 1986/96 Section 7, TRF
1988, DIN 4756 and local regulations.
If proportional pressure control RG20/30(-Z-)-M-L with
KEV:
Fit the furnace pressure meter tube to the boiler door
with the gradient towards the boiler (if required).
Lay the control lines to the KEV to the corresponding
ports P
L
and P
F
. Use the blue PU hoses supplied.
• Lay the control line so that no condensate can flow
into the KE.
• Connect hose to furnace pressure meter tube with
port P
F
(if required).
• Connect hose to port P
L
with measuring nipple for
air pressure on burner base plate.
If this connection is not made, the magnetic valves
will not open.
Installation position for KE...V
Installation positions for KE...D,Z
90°
90°

6
E.04.99 • G. 08.08.19
Installation
Establishing electrical connections
• Disconnect system from power supply. Main switch “OFF”.
• Check polarity of all connectors.
• Wire connector unit in accordance with connection diagram. Lay flexible control line so that boiler door
can still be swivelled.
• Attach cube connector connected to 7-pin black-green connector X21 to gas pressure monitor
connector A (grey) and to solenoid valves B1 (black), and secure with screw.
• Attach 7-pin black-green connector to compact gas unit (X21 & X22).
• Attach 4-pin connector unit for power control (X31) to black-green socket unit on burner (X32).
• Check correct pinout according to connection diagram, if connector unit X11 and X31 wired.
• Attach 7-pin connector unit for boiler control (X11) to black-brown socket unit on burner (X12).
• Supply lead to 7-pin connector unit X11 must be protected with a min. 6.3 A slow-blowing or
max. 10 A quick-blowing fuse.
Connection diagram
T8
T7
T6
B5
X31 X32
zu
auf
Connection for RG 20/30-M-L
Y9
connector unit X31,X11
boiler control
socket unit X32,X12
on burner
T8
T7
T6
B5
X32
N
F22
P12
X31
Connection for RG 20/30-Z-L
H12
connector unit X31,X11
boiler control socket unit X32,X12
on burner
L1
PE
N
B5
T6
T7
T8
F51
Y1
Y3
B4
S3
T2
T1
N
PE
L1
N
PE
L1
N
N
F1 F3
F21
H11
P11
H13
Q1 X11 X12
connector unit X31,X11
boiler control socket unit X32,X12
on burner socket unit X22
on burner
connector unit X21
compact unit
Key:
F1 External fuse
F21, F22 Ext. temp. controller,
1st/2nd stages
F3 Ext. safety thermal cutout
F51 Gas pressure monitor
Q1 Main heating switch
H11,H12 Ext. pilot lamp
H13 Ext. fault signal lamp
L1 Phase
PE Earth conductor
P11,P12 Time meter
Y1,Y2 Solenoid valve
Y3 Safety solenoid valve
Y9 External controller

7
E. 04.99• G.08.08.19
Function
Function
Control unit LME
Testing the control unit for proper functioning
Danger of fatal injury from electric shocks!
Disconnect electrical cable from power supply before
carrying out any work on live parts! Troubleshooting
may only be carried out by authorised and trained per-
sonnel! Unlocking may only be carried out by an autho-
rised specialist.
After startup and after maintenance of the burner, the following controls to perform.
Burner startup with broken lines to the flame detector:
• Disconnect the cable to the flame monitor and restart the burner.
At the end of the safety time the controller makes a lockout
• Reestablish the connection.
Burner operation with simulated loss of flame:
• Pull the compact unit the square plug from the gas pressure switch and jumper the contacts in the
connector.
• Start the burner.
• Connect operation are the ball valve.
After loss of flame, the controller makes a lockout.
• Remove the jumper in the connector and insert it back to the gas pressure switch of the compact unit.
Burner operation with simulated air pressure loss:
• Pull are the operation from the air hose to the "+" input of the air pressure switch.
The controller makes a lockout.
• Insert the air hose back onto the air pressure switch
Safety and switching functions
In the event of a flame failure during operation, the fuel supply is immediately switched off and the control
box goes into fault mode. A restart takes place in all cases following a mains power failure. A fault is trig-
gered immediately if there is flame detection during pre-ventilation. The position of the air pressure monitor
is continuously checked. There can be no start-up if it is not in its neutral position. A fault is triggered if the
working contact fails to close during pre-ventilation, or reopens. In the event of a lack of air during operation,
the air pressure monitor contact opens and the valves close immediately. The device goes into fault mode.

8
E.04.99 • G. 08.08.19
Function
Operational status indication
Legend:
Steady on
OFF
Red
Yellow
Green
Color code table for multicolor signal lamp (LED)
Status Colore code Color
Waiting time «tw», other waiting states
.................................
OFF
Oil preheater on
.................................
Yellow
Ignition phase, ignition controlled

Flashing yellow
Operation, flame o.k.
.................................
Green
Operation, flame not o.k.

Flashing green
Extraneous light on burner startup

Green-red
Undervoltage

Yellow-red
Fault, alarm
......................................
Red
Error code output
(refer to «Error code table»)

Flashing red
Interface diagnostics

Red flicker light
.........


9
E. 04.99• G.08.08.19
Function
Diagnostics of the cause of fault
After lockout, the red signal lamp will remain steady on. In that condition, visual diagnostics of the cause of
fault according to the error code table can be activated by pressing the lockout reset button for more than
3 seconds. Pressing the lockout reset button again for at least 3 seconds, interface diagnostics will be ac-
tivated. Interface diagnostics works only if the lockout reset button extension AGK20… is not fitted. If, by
accident, interface diagnostics has been activated, in which case the slightly red light of the signal lamp
flickers, it can be deactivated by pressing again the lockout reset button for at least 3 seconds. The instant
of switching over is indicated by a yellow light pulse.
Error code table
During the time the cause of fault is diagnosed, the control outputs are deactivated
- Burner remains shut down
- External fault indication remains deactivated
- Fault status signal (alarm) at terminal 10, according to the error code table
The diagnostics of the cause of fault is quit and the burner switched on again by resetting the burner control.
Press the lockout reset button for about 1 second (<3 seconds).
Red blink code of
signal lamp (LED)
Alarm at
term. 10
Possible cause
2 x blinks ON No establishment of flame at the end of safety time
- Faulty or soiled fuel valves
- Faulty or soiled flame detector
- Poor adjustment of burner, no fuel
- Faulty ignition equipment
3 x blinks ON Air pressure switch faulty
- Loss of air pressure signal after specified time
- Air pressure switch welded in normal position
4 x blinks ON Extraneous light when burner is started up
5 x blinks ON Air pressure switch time supervision
- Air pressure switch welded in working position
- Error with valve proving (only in conjunction with LDU11...)
6 x blinks ON Free
7 x blinks ON Too many losses of flame during operation (limitation of repetitions)
- Faulty or soiled fuel valves
- Faulty or soiled flame detector
- Poor adjustment of burner
8 x blinks ON Free
9 x blinks ON Free
10 x blinks OFF Wiring error or internal error, output contacts, other faults
14 x blinks ON CPI contact not closed

10
E.04.99 • G. 08.08.19
Function
Air flow setting, dimension “A”
1 Dimension “A”
2 Adjusting screw for air restrictor (RG20)
3 Adjusting screw for air restrictor (RG30)
RG20:
Turn screw (2) anticlockwise: increase air “+”
Turn screw (2) clockwise: reduce air “-”
RG30:
Turn nut clockwise (3): increase air “+”
Turn nut (3) anticlockwise: reduce air “-”
Air flap positioning motor
Cooling of furnace avoided during burner standstill.
SA2-F [for RG20-L-N(-F) only]:
Position “OPEN” - “CLOSED” of electric-motor-driven
unit indicated at display lever. When servicing/retrofit-
ting, refer to wiring diagram.
Do not turn red positioning lever by hand as mecha-
nism is destructible.
RG 20
RG 30
2
1
1
3