Geco GH11MA User manual

OPERATING INSTRUCTIONS
FOR THE CONTROLLER
GH11MA
TO CONTROL
VENTILATORS
CENTRAL HEATING BOILERS
FOR FINE DUST AND COAL
Version 01
SERVICE MANUAL
We strongly request that you study the instructions carefully before connecting and
commissioning of each of our devices. In case of any doubt, please contact us between 8.00 a.m.
and 4.00 p.m.

SERVICE MANUAL GH11MA PAGE 2
CONTENTS
1. INTRODUCTION ...............................................................................................................................3
1.1. GRAPHIC DESIGNATIONS..................................................................................................................3
1.2. KEYBOARD AND FUNCTION KEYS.....................................................................................................3
2. GENERAL CHARACTERISTICS. ...........................................................................................................4
3. DANE TECHNICZNE ..........................................................................................................................5
4. ELECTRICAL INSTALLATION AND CONNECTION RULES ......................................................................6
5. QUICK START...................................................................................................................................6
6. OBSŁUGA GH11MA..........................................................................................................................8
6.1. HEATING SYSTEM OPERATED...................................................................................................................8
6.2. AUTOMATIC OPERATION MODE ...............................................................................................................9
6.3 MANUAL OPERATION MODE .................................................................................................................10
6.4 TEMPERATURE OVERVIEW ....................................................................................................................10
6.5 ALARMS ............................................................................................................................................11
6.6 SUPPLY VOLTAGE FAILURE ....................................................................................................................11
6.7 BOILER EXPIRY DETECTION....................................................................................................................11
7. USER SETTINGS..............................................................................................................................12
7.2 PRESCRIBED BOILER TEMPERATURE (U0).................................................................................................12
7.3 DHW/RETURN SETPOINT TEMPERATURE (U2).........................................................................................12
7.4 ANTI-LEGIONELLA FUNCTION (U3).........................................................................................................12
8. OPERATION OF THE HOT WATER BOILER........................................................................................ 14
8.2 ASSEMBLY AND CONNECTION................................................................................................................14
8.3 CONFIGURATION OF AUXILIARY PUMP ....................................................................................................14
8.4 DHW PRIORITY ..................................................................................................................................15
8.5 SUMMER MODE..................................................................................................................................15
9. ROOM PANEL ................................................................................................................................15
10. TEMPERATURE LIMITER (STB).....................................................................................................17

SERVICE MANUAL GH11MA PAGE 3
10.2 MODE OF OPERATION ......................................................................................................................17
10.3 STB FUNCTION REACTIVATION (MANUAL) ...........................................................................................17
11. DEALING WITH CONTROLLER DAMAGE.......................................................................................19
12. CONNECTION OF APPLIANCES TO THE GH11MA CONTROLLER.....................................................21
13. INFORMATION ON THE MARKING AND COLLECTION OF WASTE ELECTRICAL AND ELECTRONIC
EQUIPMENT .........................................................................................................................................22
14. SERVICE MODE...........................................................................................................................23
1. INTRODUCTION
1.1. GRAPHIC DESIGNATIONS
Warning
This symbol is used when it is necessary to follow the sequence of operations in the
described instructions. If you make a mistake or do not follow the description, the
device may be damaged or destroyed.
Important!
This symbol indicates information of special interest.

Reference
This symbol indicates the occurrence of additional information in the chapter.
1.2. KEYBOARD AND FUNCTION KEYS
The symbols intended to signal and at the same time emphasise the importance of the text in which the
information on the warning of a dangerous situation is contained have the following graphic form:
PROGRAMMING

SERVICE MANUAL GH11MA PAGE 4
2. GENERAL CHARACTERISTICS.
The GH11MA controller is made using microprocessor technology with automatic surface mounting.
The controller controls the process of preparation of usable hot water (DHW circuit) and enables operation of the
main heating circuit (CH circuit). The control parameters can be adjusted to the current operating conditions and
the type of boiler. The controller is equipped with a system of protection against the effects of power failure and
various types of interference.
The GH11MA controller is equipped with:
Outputs:
1. to measure the temperature of the boiler outlet water (NTC type)
2. to measure the water temperature in the DHW boiler (NTC type - optional)
3. to measure the flue gas temperature (type PT1000 - optional)
input (RS485) for the connection of room panel GA01HA by GECO
It also has three outputs enabling direct connection of 230V devices, i.e.: a fan, central heating circulation pump,
HUW pump or a mixing pump, dependin
ZAŁĄCZ /
WYŁĄCZ
MANUAL ACTIVATION OF
CENTRAL HEATING AND HOT
WATER PUMPS / SIGNALLING
THE OPERATION STATUS OF
THE PUMPS
MANUAL ACTIVATION OF THE CO
/ PARAMETER VALUE CHANGE
UPWARDS
FIRING UP
MANUAL ACTIVATION OF
THE HOT WATER
PUMP/CHANGE OF
PARAMETER VALUES
DOWNWARDS

SERVICE MANUAL GH11MA PAGE 5
THE CONTROLLER SHOULD BE ALWAYS DISCONNECTED FROM
THE MAIN SUPPLY DURING A STORM
3. DANE TECHNICZNE
Supply voltage
230V ~ +10% -15%
Resistance
characteristics of NTC
sensors
Resistance
characteristics of
PT1000 sensors
Working temperature
od +5°C do +40°C
Moisture
od 20% do 80% RH
Temp.
°C
Resistance

Temp.
°C
Resistance

Fan protection
3,15A
0
7174,89
0
1000,00
Sensor type
NTC 2,2kPT
10
4374,83
50
1194,00
Operating range of the
temperature sensor
NTC:
0°C÷100°C
20
2747,10
100
1385,10
PT1000:
0°C÷750°C
30
1774,91
150
1573,30
40
1172,09
200
1758,60
50
795,08
250
1941,00
Output
Maximum
continuous load
60
547,95
300
2120,50
70
384,62
350
2297,20
Pompa CWU / miesz.
1A
200W
80
275,86
400
2470,90
Pompa CO
1A
200W
90
202,37
450
2641,80
Wentylator
1A
200W
100
149,16
500
2809,80
550
2974,90
600
3137,10
650
3296,40
700
3452,80
750
3606,40

SERVICE MANUAL GH11MA PAGE 6
4. ELECTRICAL INSTALLATION AND CONNECTION RULES
1. The boiler room should be equipped with a 230V/50Hz electrical installation in accordance with
the relevant regulations.
2. The electrical installation (irrespective of its type) must be terminated with a plug socket fitted
with a protective contact. The use of a socket without a protective terminal connected risks an
electric shock!!!
3. The controller must be connected to a separately routed power line protected with a suitably
selected fast fuse and a residual current circuit breaker (anti-shock). No other devices may be
connected to this line !!!
THE REGULATOR IS POWERED FROM THE MAINS 230V/50HZ
ANY REPAIRS CAN ONLY BE CARRIED OUT WITH THE POWER SUPPLY
DISCONNECTED AT THE FUSE
5. QUICK START
To start the GH11MA controller, perform the following steps:
1. Connect the unit to the 230V mains supply (insert plug into the socket).

2. Switch on the controller using the button . A screen will appear:

SERVICE MANUAL GH11MA PAGE 7
3. Press the button . The screen will appear:
Controller will start automatic operation based on the factory-set parameters.
Table 1 - Factory settings
Parametr
Parameter description
Min
Max
Step
Factory
setting
U00
Boiler setpoint temperature
’F03’
’F04’
1°C
50°C
U02
Desired DHW temperature / return
35
65
1°C
40°C
U03
Activation of the anti-legionella function
0
1
1
0

SERVICE MANUAL GH11MA PAGE 8
6. OBSŁUGA GH11MA
6.1. Heating system operated
6.2.2 CH + DHW circuit
INPUTS
OUTPUTS
T1 –Boiler temp.
P2 - fan
T3 –DHW temp.
P3 –DHW pump
T6 –Exhaust gas
temp.
P4 –CO pump
6.2.3 CH circuit + mixing pump
INPUTS
OUTPUTS
T1 –Boiler temp.
P2 - fan
T6 –Exhaust gas
temp.
P4 –CO pump
T8 –Return temp.
P8 –mixing pump

SERVICE MANUAL GH11MA PAGE 9
6.2. Automatic operation mode
Pressing the button enters the automatic operation mode of the controller (start of firing-up).
6.2.4 Firing up
The first stage of automatic operation is FIRING-up, which is signalled by the upper indicator light
on the button. .
FIRE-up is automatically terminated when the boiler outlet water temperature reaches U0-F29.
Completion of the firing-up process and exit from it is signalled by lighting up the upper control
light on the button , which remains on during the entire period of the boiler operation in automatic
mode. During the exit from kindling, the fan does not work.
Fire extinguishing during boiler firing up is signalled by displaying message AL 14 on the controller
main screen ( p.6.5 p.11).
This alarm sounds and the firing process is stopped if, after the time set in in service parameter F45
from the moment of start of firing-up the temperature of outlet water from the boiler does not reach the
value F6-4°C.
If it is necessary to burn fuels other than the base fuel, remove
the flue gas temperature sensor from the flue pipe.
(there is a possibility of damaging this sensor) !!!
6.2.5 Fan
In FIRING-UP mode, the fan starts from the minimum speed (gear 1) and increases its speed in
accordance with setting F31, until it reaches the maximum speed set in in service parameter F2.
The fan continues to run until the boiler outlet water temperature reaches the value set in service
parameter F29. Once this value is reached, the fan stops and does not run for approximately 120 seconds.
When the set temperature on the boiler is reached, the fan switches to periodic purging. The duration of
the purge is according to the value set in parameter F26, and the fan operates at its maximum capacity.
These purges take place at intervals set in parameter F27.
Fan activation and operation is indicated by the appearance of a lower vertical line on the controller
display before the temperature measurement.

SERVICE MANUAL GH11MA PAGE 10
6.2.6 CO Pump
In automatic operation mode, the CH pump switches on if the boiler water temperature is greater
than or equal to the value set in service parameter F6 (factory setting is 400C).
The operation of the CH pump is signalled by the upper indicator light on the button
The controller will switch off the pump if the water temperature falls to the pump switch-on temperature
minus 4oC. (If the CH pump switch-on temperature is 400C, then CH pump switch-off temperature is 360C).
6.3 Manual operation mode
Pressing the button switches from automatic to manual operation mode of the controller and
immediately stops the operation of the fan and feeder.
In this operation mode, the user can switch the CH pump and the HUW pump on and off manually and
independently. To do this, follow the diagram below:
ACTIVATION OF THE DOMESTIC HOT WATER PUMP IS
ONLY POSSIBLE IF ITS OPERATION HAS BEEN SELECTED IN
THE SERVICE PAR
6.4 Temperature overview
When the button is activated the display shows the boiler outlet water temperature. Viewing of the flue
gas and DHW/return temperatures is possible in the AUTOMAT and HOLD operating modes, provided that the
flue sensor operation (F11) or the auxiliary pump operation ( p.8.2 p.14) is activated respectively.
To preview the flue gas temperature, press the button . Ponowne wciśnięcie przycisku powoduje wyjście z
podglądu. Wyjście z podglądu następuje również samoczynnie po czasie 10s od momentu naciśnięcia przycisku.
STEP 1
STEP 2
→
i
i
The controller
shows the
measured water
temperature on
the CH boiler
DHW pump
The lower indicator light on the
button lights up .
Pressing the button again
switches off the CH pump and
extinguishes the indicator light.
CO pump
The upper indicator light on
the button lights up .
Pressing the button again
switches off the CH pump and
extinguishes the indicator light.