Gruppo Imar Kondens Gimax Plus 25 Series Guide

Kondens
ITALIAN DESIGN
MADE IN ITALY
thea mr/mn
Wall-mounted condensing boiler
INSTALLATION, COMMISSIONING, USE AND MAINTENANCE MANUAL
G20 ENGINEERING SRL Loc. Campogrande 13, 29013 CARPANETO PIACENTINO (PC), Italy
phone [phone] - fax. [phone] - www.aircontrol-pc.com - www.g20engineering.com
Gimax PLUS25-30
Wall-mounted condensing boiler

1
GIMAX PLUS 25-30 MANUAL
VERS. 01/2020 - REV.3

2
TABLE OF CONTENTS
General requirements 2
-EC conformity declarartion 2
-General instructions 2
Use and operation 3
-Description of the boiler 3
-Components 3
-Ignition 4
-Interface description 4
-Stand-by Main menu 5
-Operation Main menu 6
-Season selection 7
-Temperature regulation 7
-Information menu 8
-
Operation with room thermostat 10
-Operation with external sensor 10
-Operation with
Open-therm timer thermostat 10
-Special functions 10
-Faults 11
-Fault codes table 12
Installation 13
-Operation diagram 13
-Three-way boiler diagram 13
-Electrical wiring diagram 14
-Graphs for the head available
to the system 15
-Installation 15
-Fastening the boiler to the wall 16
-Layout of connections 17
-Plumbing the boiler 17
-Connecting lling tap for central heating
only boilers 18
-Filling the system 18
-Connecting the condensate line 18
-
Connection to the mains gas supply 19
-Connection to the mains electrical system 20
-Combustion gas evacuation
system: compatible applications
21
-Combustion gas
evacuation system: installation 22
-Air intake and combustion gas evacuation
system: important information
24
Adjustment and maintenance 25
-Preliminary maintenance operations 25
-General maintenance operations 25
-Service function 25
-Data plate 27
-Power adjustment 27
-
Testing the gas supply dynamic pressure 28
-Analysis - Checking and regulating
combustion 30
-Changing gas type 31
-Conguration the accessing menu 32
-Conguration menu 34
-Installation of room thermostat/Open-Therm 36
-Installation and conguration
of external temperature sensor 37
-Conguring the climate curve
from those available 38
-Special functions 39
-Thermostat post circulation/ventilation
function 40
-Technical Data sheet 41
GENERAL INFORMATION
GENERAL REQUIREMENTS
This manual, supplied with every boiler, should be
considered as an integral component as it contains
instructions for the correct, safe and appropriate
installation, use and maintenance of the system.
The manual must always be kept by the user of
the boiler and made available for the installation
and/or maintenance technicians to consult. It must
also accompany the boiler if it should be moved
or otherwise transferred.
The manufacturer shall not be held responsible
for any damage caused by failure to follow the
instructions contained in this manual, nor:
If the boiler is used for purposes other than those
for which it was built
If any part or circuit of the boiler is modied
If accessories or kits not approved by the
manufacturer are installed
If ordinary and extraordinary maintenance is not
performed by qualied personnel
If applicable technical and legal requirements
have not been observed during installation and
maintenance of the boiler.
WARNING!
If the boiler should cease to function or not function
correctly, deactivate it immediately by turning it off
and then shutting off the gas supply. Do not attempt
any repairs or direct work on the boiler.
Only personnel with the necessary qualications
and licenses must perform maintenance on the
boiler. Any repairs must be performed using only
original parts and accessories.
SYMBOLS USED IN THE MANUAL
Advice, suggestion, note
Important communications, signaling
of modes and operations which could
compromise the correct operation
of the boiler and endanger people.
Kleine Kessel srl estabilished in Loc. Campogrande, 13 - Carpaneto Piacentino whose processes of design, manufacturing
and after-sales service are in compliance with requirements of UNI EN ISO 9001:2008 - DECLARES that boilers are in
compliance with European Directives and with European Delegates regulations.
Chief Executive Marco Rapaccioli
EC CONFORMITY DECLARATION (ACCORDING TO ISO/IEC 17050-1)
CE CERTIFICATES ARE AVAILABLE ON OUR WEBSITE www.produzionecaldaie.it

3
DESCRIPTION OF THE BOILER
The range of wall-hung condensing boilers
is completed by the GiMax PLUS model. A
perfect, powerful, reliable and ecological
boiler, it is fitted with a high efficiency
condensing heat-exchanger and is
completely made in Italy.
The boiler includes a PCB with microprocessor
to manage the system in such a way as to
always provide maximum efficiency and
minimum waste.
GIMAX PLUS MR/CR (CH/DHW)
1) MAIN HEAT EXCHANGER
2) EXHAUST SAFETY SENSOR
3) CH PROBE/SAFETY PROBE
4) 3WAY GROUP
5) SAFETY VALVE
6) DHW IMMERSION PROBE
7) PRESSURE GAUGE
8) CIRCULATOR UNIT
9) DHW PRIORITY DEVICE
10) PRESSURE TRANSMITTER
11) GAS VALVE
12) PLATE HEAT EXCHANGER
13) FAN
14) EXPANSION VASSEL 8 LT
15) RETURN PROBE
16) SIFON
Pict. 1
USE AND OPERATION
14
2
13
15
5
11
8
7
912
6
10
16
4
3
1
Pict. 2
COMPONENTS

4
Pict. 3
INTERFACE DESCRIPTION
IGNITION
Turn on the boiler’s electrical supply at the
switch, which must be installed on the power
supply line to the boiler. The LCD display (with
blue backlight) will turn on immediately,
showing the two-digit software version
number loaded on the microprocessor for
a few seconds, while an automatic check is
performed on the conditions of the system
and installed devices. When this stage has
nished, if no faults are present, the last page
of the MAIN MENU to be stored is displayed
on the LCD (the one being displayed when
the power was turned off).
The interface allowing all operating parameters to
be selected and modied as well as their relative
values to be displayed is extremely simple. It is
composed of a large backlit
LCD which displays all symbols necessary for
communicating the boiler’s status in a simple and
immediate way, together with a series of buttons
which are matched unequivocally to a specic
function indicated on the display. Consult the
relevant sections to get explanations on the symbols
and the possible operating modes.
1: ON/OFF BUTTON
2: SUMMER/WINTER BUTTON
3: RESET BUTTON
4: INFORMATION/CONFIGURATION BUTTON
5: DHW TEMPERATURE DECREASE
6: DHW TEMPERATURE INCREASE
7: CH TEMPERATURE DECREASE
8: CH TEMPERATURE INCREASE
1
5
2
6
3
7
4
8
Pict. 4
GIMAX PLUS MN/CN (CH ONLY)
1) MAIN HEAT EXCHANGER
2) EXHAUST SAFETY SENSOR
3) CH PROBE/SAFETY PROBE
5) SAFETY VALVE
7) PRESSURE GAUGE
8) CIRCULATOR UNIT
10) PRESSURE TRANSMITTER
11) GAS VALVE
13) FAN
14) EXPANSION VASSEL 8 LT
15) RETURN PROBE
16) SIFON
14
15
5
10
8
7
11
16
13
3
1
2

5
“STAND-BY” MAIN MENU
When the boiler is turned on, two operating
modes are possible. These ones constitute
the MAIN MENU from which it is possible to
set any operating mode required or view the
boiler status at any time. The characteristics
of the possible options for each of the MAIN
MENU pages are given below:
Page 1 - STAND-BY (Pict. 5.1)
In this mode the device is powered on but all
functions regarding the supply of domestic
hot water or central heating are inactive.
In this mode the central heating system
pressure is displayed (in boilers with pressure
transmitter) and the MAIN MENU can be
entered by pressing button 1; to go back to
the starting page (STAND-BY) press button 1
again (Pict. 5.2)
By pressing button 4, the INFORMATION
MENU is accessed; to go back to the starting
page, press button 4 again (Pict. 5.3)
Consult the relevant chapters for menu
exploring and menu functions: “FUNCTION”,
“INSTALLER MENU”.
When in the STAND-BY mode, all fault
indication modes remain active as do the
main maintenance functions for the diverter
valve (when tted) and the circulator unit
together with the ANTI-FROST function.
In standby/off mode the boiler is
inactive but its electricity supply
is still connected!
Pict. 5.1
Pict. 5.2
Pict. 5.3
1
1
4
4

6
OPERATION MAIN MENU
The OPERATION page is the main page which
is always displayed during normal operation
of the boiler. Symbols regarding the following
items are always displayed on this page:
Boilers with domestic hot water production
• The selected season.
• The DHW temperature set.
• The temperature of the water in the CH
circuit.
• The INFORMATION menu access symbol.
• The INSTALLER menu access symbol.
• The standby/off menu access symbol.
(Pict. 6.1)
When the burner is lit and running in order to
produce domestic hot water, the tap symbol
ashes and the temperature of the supplied
domestic hot water is displayed. During
heating of the central heating circuit water,
the radiator symbol ashes alternatively to the
C.H. temperature: in both cases, the ame
symbol is always displayed (Pict. 6.2). Based
on whether devices such as the pressure
sensor, external temperature sensor and OT
timer thermostat are installed, the following
are displayed, respectively: the pressure
of the central heating circuit with relative
symbol, the external sensor present symbol
and the OT timer thermostat present symbol.
(Pict. 6.3).
Central-heating only boilers
• The temperature of the water in the CH
circuit.
• The INFORMATION menu access symbol.
• The INSTALLER menu access symbol.
• The standby/off menu access symbol.
(Pict. 6.4)
When the burner is operating the ame signal
is displayed with the radiator symbol ashing
(Pict. 6.5). Based on whether devices such
as the pressure sensor, external temperature
sensor and OT timer thermostat are installed,
the following are displayed respectively: the
pressure of the central heating circuit with
relative symbol and the OT timer thermostat
present symbol. (Pict. 6.6).
Pict. 6.1
DHW temperature
CH temperature
Season selector
CH temperature
System Pressure
External temperature
sensor
OT thermostat remote
control
System Pressure
External temperature
sensor
OT thermostat remote
control
Burner on
Burner on
Pict. 6.2
Pict. 6.3
Pict. 6.4
Pict. 6.5
Pict. 6.6

7
SEASON SELECTION
TEMPERATURE REGULATION
Boilers for domestic hot water production
It is possible to regulate the temperature of the
domestic hot water supplied as well as that
for the central heating. The set temperature
will be reached, if possible, when supplying
these services and maintained at the set value,
allowing the user requests to be satised in
both cases.
The temperature supplied for both modes is
continuously displayed near the relative symbol
when the functions are active: the radiator for
the central heating and the tap for domestic
hot water.
When the boiler is in standby the DHW
temperature displayed is the set value.
Setting DHW temperature
Press one of the two buttons upon the tap
symbol (5-6): the set and displayed temperature
value starts ashing; then press the button
(6) to increase the temperature of DHW. Each
time this button is pressed, an increase by 1°C
is obtained. In order to decrease the DHW
temperature, press the button (5). Each
The boiler has two operating modes, which
depend on the basic configuration, in
response to the external temperature or
the user requirements. These modes can be
selected from the OPERATION page:
Boilers with domestic hot water production
SUMMER mode deactivates all central
heating functions, maintaining only domestic
hot water production. When the boiler is in
this mode the SUN symbol is displayed on the
function page (Pict. 7.1).
• WINTER mode, in which all central heating
and domestic hot water production functions
are active. When the boiler is in this mode
the SNOWFLAKE symbol is displayed on the
function page (Pict. 7.2).
• To select the desired mode, press button 2.
Central-heating only boilers
The season selection option is not available
in central heating only boilers. The device
can therefore be in standby mode (Pict. 5.1)
or else operational, ready to supply the only
service which it has been manufactured for
(Pict. 7.3).
Pict.. 7.1
Pict.. 7.2
Pict.. 7.3
2
2

8
time this button is pressed, a decrease by 1°C
is obtained.
Once the needed temperature value is set, do
not press the (5-6) buttons anymore.
The new DHW temperature value will ash for
5 seconds, then it will be stored and displayed.
The minimum hot water temperature which
can be set is 30°C, the maximum 60°C.
Setting CH temperature
Press one of the two buttons upon the tap
symbol (7-8): the set and displayed temperature
value starts ashing; then press the button
(8) to increase the temperature of CH. Each
time this button is pressed, an increase by
1°C is obtained. In order to decrease the CH
temperature, press the button (7). Each
time this button is pressed, a decrease by1°C
is obtained.
Once the needed temperature value is set, do
not press the (7-8) buttons anymore.
The new CH temperature value will ash for 5
seconds, then it will be stored and displayed.
The CH temperature values depend on the
type of installation. For boilers used for high
temperature systems, the temperature range
is 50°C - 80°C, while for the ones used for low
temperature systems, the temperature range
is 27°C - 55°C.
Setting heating temperature
If the “Summer” mode is active (the sun symbol
is displayed), the device for modifying the CH
temperature is disabled.
Boilers for central heating only (MN-CN)
In central heating only boilers, the temperature
value for the single option which can be
viewed on the display can be adjusted only.
The central heating temperature setting is
performed as previously described.
THE USE OF TOO HIGH DHW
TEMPERATURES CAUSES THE
PREMATURE WEAR OF THE DHW
HEAT EXCHANGER.
ASK YOUR AREA INSTALLER FOR
INFORMATION ON THE TYPE
OF SYSTEM CONNECTED AND
RESPECTIVE ADJUSTMENTS
INFORMATION MENU
Accessing the INFORMATION MENU allows
various important parameters regarding the
boiler adjustments and status to be viewed,
allowing the state determining its operation
to be known at any time. The displayed
parameters cannot be modied.
To access the menu pages, press BUTTON 4.
The menu can be accessed both when the
boiler is in stand-by and when it is operating.
Selecting the menu pages
In order to visualize the values of all the
INFORMATION MENU parameters, after
activating the initial page, press the
button
(6) to scroll forward the pages and press the
button (5) to scroll backward the pages.
The automatic exit from the menu happens
after 60 seconds of device inactivity, or by
pressing any button.
The display will return to last menu page
active when the INFORMATION MENU was
accessed.
Temp. acqua sanitario Temp. acqua riscaldamento
Pict. 8
56 7 8

9
REQUEST INFORMATION ON CONNECTED DEVICES FROM AREA AUTHORISED
INSTALLER
Pict. 9
5 6
5 6
5 6
5 6
5 6
“1”
“4”
*se presente
“7”
“9”
“8”
CFS
dUt
Cor
SPE
“2”
“3”
“5”
“6”
“10”
“11”
“12”
If present
INFORMATION MENU LIST
1 DHW temperature
2 Return sensor temperature
3 Flue gas probe temperature
4 External sensor temperature (if present)
5 CH circuit pressure
6 Ionization current
7 Fan speed
8 Last fault code
9 Second to last fault code
10 CH temperature
11 Days to ordinary maintenance expiration
12 Circulator Feedback

10
OPERATION WITH OPEN-THERM TIMER THERMOSTAT
REQUEST INFORMATION ON
INSTALLATION OF THE EXTERNAL
SENSOR AND OPTIMAL
REGULATION OF THE BOILER
FROM YOUR AREA AUTHORISED
INSTALLER.
SPECIAL FUNCTIONS
For optimum and even more economical
management of the domestic premises it is
possible to use the Easycontrol programmable
timer thermostat. Easycontrol allows all main
boiler functions to be managed remotely,
allowing it to be fully managed from a different
room to that where the boiler is installed.
Easycontrol can also be used to schedule
daily and weekly room temperatures and
manage reduced demand periods (holidays,
anti-frost and maintenance modes).
to connect the timer thermostat, and follow
the already specified instructions in the
“INSTALLATION OF ROOM THERMOSTAT”
Heating system Anti-frost function (all models)
The anti-frost function is always active and
prevents the heating system water from freezing.
If the heating circuit water temperature probe
detects a too low water temperature, the
circulating pump starts and the burner ignites
at the minimum power.
The function remains active until the set
temperature is reached, in order to prevent
the heating system water from freezing.
Instant DHW exchanger pre-heating
This function can be activated exclusively on
models which are prepared and congured
to instantly obtain domestic hot water; this
function allows to keep the DHW exchanger
at a temperature which is close to the set one.
The activation of this function may improve
the boiler’s performance on the DHW request.
REQUEST INFORMATION ON
INSTALLATION OF THE EXTERNAL
SENSOR AND OPTIMAL REGULATION
OF THE BOILER FROM YOUR AREA
AUTHORISED INSTALLER.
OPERATION WITH EXTERNAL SENSOR
The boiler can be connected to an EXTERNAL
sensor. In this mode, the system can regulate
the central heating circuit temperature
automatically based on the temperature
measured by the suitably located sensor on
the outside of the building.
Adjustments are made automatically to the
central heating circuit temperature using
a pre-loaded mathematical algorithm.
Different “climate curves” can be selected by
modifying the correct parameters, allowing
the boiler to be optimized for a specific
climatic area or season.
It is possible, in any case, to customize the
central heating circuit temperature; by
increasing or decreasing the central heating
circuit temperature, the temperature itself
(temperature offset) adapts to the selected
climate curve.
ASK YOUR AREA INSTALLER
FOR INFORMATION ON THE
INSTALLATION AND OPERATION
OF A ROOM THERMOSTAT.
OPERATION WITH ROOM THERMOSTAT
Energy savings regulations REQUIRE
the boiler to be connected to a room
thermostat in order to optimally regulate
and maintain the temperature in domestic
environments.
chapter.
Refer to the instructions for correct installation
and use of the “Ecocrono” thermostat.
To activate the O.T. communication it is
necessary to select the corresponding
parameter P13.

11
FAULTS
ALWAYS LEAVE THE BOILER POWERED ON AND THE SHUT-OFF VALVES OPEN, IF THE
SYSTEM IS EXPECTED TO BE SUBJECT TO VERY COLD TEMPERATURES.
THIS FUNCTION DOES NOT GRANT TO PREVENT THE HEATING SYSTEM FROM
FREEZING, SINCE IT DEPENDS ON THE BOILER CONTINUOUS ELECTRIC POWER AND
GAS SUPPLY.
FOR INFORMATION ABOUT CONFIGURING THE BOILER TO PROTECT IT FROM
FREEZING, ASK THE AUTHORIZED AREA INSTALLER.
FOR INFORMATION ABOUT CONFIGURING THE DHW TEMPERATURE, ASK THE
AUTHORIZED AREA INSTALLER.
ACTIVATING THIS FUCTION MAY CAUSE THE EARLY DETERIORATION OF THE DHW
EXCHANGER AND A HIGHER GAS CONSUPTION.
FOR INFORMATION ABOUT THE CORRECT FUNCTION CONFIGURATION, ASK THE
AUTHORIZED AREA INSTALLER .
Pict. 10
All functions supported by the boiler are
managed by a microprocessor-based system
which, aside from allowing the system to run
perfectly in order to maintain the greatest
level of comfort possible, constantly monitors
the functional parameters, ensuring they fall
within the necessary safety interval by a wide
margin, and therefore that all devices present
are functioning perfectly.
Whenever the malfunction of any component
or conditions which could compromise safe
operation of the system are detected, the
microprocessor system places the device
into a limited operation mode or even
completely prevents it from operating. The
microprocessor system is able to detect and
issue warnings for the main fault conditions
to allow the system to be brought back to
normal conditions as soon as possible. Fault
warnings are given on the LCD display. The
malfunction is detected and an intermittent
warning displayed immediately, consisting
of a number preceded by the error symbol
E and by the relevant fault symbol (Pict. 10).
Faults are displayed on any screen of the
main menu.
Conditions causing transitory faults are
possible. Many of these are recognized
and cause a temporary block which is
automatically reset once the condition
causing the fault has stopped. Some of these
provide for the possibility to attempt to restore
operation manually.
Manual error reset, recovery attempt
To manually reset the system following a
fault condition, press the button 3: the RST
symbol (reset) will be displayed on the
LCD display. Press button 3 again (Pict. 11).
The microprocessor will attempt to recover
the system by resetting all the conditions
presumed to have caused the fault. If the
operation is successful the boiler will return
to normal operation; if not, the error code
causing the malfunction will be displayed
again.
Pict. 11
IF A FAULT IS NOT SOLVED AFTER 2 MANUAL RESET ATTEMPTS THEN THE AUTHORISED
TECHNICAL ASSISTANCE CENTRE MUST BE CALLED.
TAMPERING WITH ANY DEVICE MAY BE DANGEROUS AND ANNULS EVERY WARRANTY
CONDITIONS.
3 3

12
FAULT CODES TABLE
*can be displayed only if the relative devices are installed
Code Possible cause Behaviour Possible actions
E01 Ignition failed Boiler locked
Check gas presence Check gas
line pressure Check ignition/
detection electrodes
Check electronic cable
Check igniter
E03
Heating system temperature
sensor fault Boiler locked Replace DHW sensor
E04
Domestic hot water system
temperature sensor fault
DHW supplied in provisional mode
Heating functions Replace CH sensor
E06
High temperature detected by
heating system sensor
Device in stand-by
Normal DHW supply
Wait for automatic unlocking
Check pressure to CH system
E08
Central heating system pressure
too low Boiler locked Check pressure to CH system
E09
Over-temperature safety probe
intervention Boiler locked Perform reset maneuver Contact technical support
E10 Central heating system
pressure too HIGH (> 2.7 bar) Boiler locked Check pump functioning
E11 Pressure transmitter failure Boiler locked
Check integrity of
connection
Replace pressure trasmitter
E12 Remote control reset used-up Boiler locked Reset system
Switch off power
E13 SYSTEM error Boiler locked
Reset system
Switch off power
Replace electronic board
E17 Exhaust probe damaged or
Exhaust overtemperature Boiler locked Reset the system or replace the probe
E23* Fault on external temperature
sensor
Resumption of operation without
external sensor
Check position of external
probe
Check communication line
Replace external sensor
E24 Return probe damaged
The boiler continues to operate
with circulator always at
maximum power
Replace the probe
E25
Central heating system
temperature too low freezing risk
Boiler locked If possible reset normal functioning
conditions
E28*
Water cylinder / water heater
probe failure
Boiler locked Replace probe
E30
Fan fault feedback
Boiler locked
Check fan connections
Replace fan
E31
Faulty safety probe
Boiler locked Replace the probe
E60
Circulator PWM error
Circulator always at maximum
power
Check wiring
Replace the circulator
E61
Temporary circulator failure
The circulator works in emergency
mode
Wait for normal conditions to be
restored or replace the circulator
E62
Circulator failure
Boiler locked Replace circulator
E75
Failure communication between
electronic board and display
board
Boiler locked
Reset system
Switch off power
Replace electronic board
E88 Failure OPEN THERM
COMMUNICATION Boiler locked Check connection between boiler and Open Therm
E99
Parameter
conguration error
Boiler locked Check and recongure the
parameters

13
INSTALLATION
AB
BA
1
2
3
BOILER FLOW
HOT
WATER
OUTLET
COLD
WATER
INTAKE
BOILER
RETURN IN
OPERATION DIAGRAM
THREE-WAY BOILER OPERATION DIAGRAM
Pict. 12
Pict. 13
Pict. 14
1) Primary heat exchanger
2) Burner
3) Fun
4) Gas valve
5) Three-way valve
6) Safety valve
7) Filling loop cock
8) Hot water priority turbine
9) Secondary heat exchanger
10) Circulator unit
11) Expansion tank
1) Primary heat exchanger
2) Burner
3) Fun
4) Gas valve
5) -
6) Safety valve
7) Filling loop cock
8) -
9) -
10) Circulator unit
11) Expansion tank
CENTRAL HEATING ONLY
7
6
11
10
2
3
1
4
GAS CENTRAL
HEATING
RETURN
IMAIN
WATER
INTAKE
CENTRAL
HEATING
FLOW
CONDENSING
EXHAUST
COMBINATION: DOMESTIC HOT WATER + CENTRAL HEATING
7
6
8
9
11
10
2
3
1
4
5
CENTRAL
HEATING
RETURN
IMAIN
WATER
INTAKE
DHW
OUTLET
CENTRAL
HEATING
FLOW
GAS
CONDENSING
EXHAUST
1) Central heating circuit
2) Three-way valve
3) Boiler
OPERATION DIAGRAM

14
ELECTRICAL WIRING DIAGRAM
CENTRAL HEATING ONLY
Pict. 16
ELECTRICAL WIRING DIAGRAM
COMBINATION: DOMESTIC HOT WATER + CENTRAL HEATING
Pict. 15
List of connections for 25-30 MN/MR GIMAX PLUS BOILER
3 W.M. 3 Way Valve F. P. Exhaust Probe P. F Pwm Fan B. Boiler Earth
E.A. Ignition Electrode FAN Fan Power P. P. Pwm Pump T. P. Pressure Transmitter
H.P.
Heating Probe
R.P. Return Heating Probe V.G. Gas Valve
E.P. External Probe N. Neuter Power S.T. Safety Thermostat FL. Flow Switch
F. Phase Power B.P. Tank Probe S.P. Dhw Probe
P. Pump Power T.A./O.T
.Room Thermostat / Open Therm
T.A.-2 Thermostat room 2
T.A.
E.P.
S.P.
FL.
F.
N.
N.
E.A.
X1
F1
X6
X5
X4
X10
X3
X12
X9
11
1
11111
X2
Red +5VDC
Green -GND
Orange SIGN
Blu
Blu
Brown
Y/G
F.
N.
F.
V.G.
N.
F.
N.
F.
B
X5
X2
X3A
X1
1
6
3
4
T.P.
Red +5VDC
Green -GND
Orange SIGN
3.W.M.
FAN
P.
P.P.
Input/Brown
0VDC/Blu
1
2
3
P.F.
RED - PWM INPUT
BLACK - GND
GREEN -HALL SENSOR
BLU + 24 VDC
F.P.
R.P.
3
1
2
42 - 4 / H.P.
1 - 3 / S.T.
2
3
1
4
HALL/Black
GIALLO/VERDE
BLU
MARRONE
X3A
1
X3A
1
Lista connessioni GIMAX PLUS MR/MN
3.W.M. Valvola Tre Vie FAN Aspiratore fumi N. Neutro S.P. Sonda Sanitario BP. Sonda Boiler
B. Terra Caldaia FL. Flussostato P. Circolatore S.T. Sonda Sicurezza
E.A. Elettrodo Accensione F.P Sonda Fumi P.F. PWM Ventilatore T.P. Trasduttore di Pressione
E.P. Sonda Esterna H.P. Sonda Riscaldamento P.P. PWM Circolatore T.A. Termostato Ambiente
F. Fase M.V.G. Modulatore Vavola Gas R.P. Sensore Ritorno V.G. Valvola Gas
T.A.
E.P.
F.
N.
N.
E.A.
X1
F1
X6
X5
X4
X10
X3
X12
X9
11
1
11111
X2
Blu
Blu
Brown
Y/G
F.
N.
F.
V.G.
N.
F.
N.
F.
B
X5
X2
X3A
X1
T.P.
Red +5VDC
Green -GND
Orange SIGN
FAN
P.
P.P.
Input/Brown
0VDC/Blu
1
2
3
P.F.
RED - PWM INPUT
BLACK - GND
GREEN -HALL SENSOR
BLU + 24 VDC
3
1
2
42 - 4 / H.P.
1 - 3 / S.T.
2
3
1
4
HALL/Black
GIALLO/VERDE
BLU
MARRONE
X3A
1
B.P.
3.W.M.
1 6
34
R.P.
F.P.

15
GRAPHS FOR THE HEAD AVAILABLE TO THE SYSTEM
INSTALLATION
Pict. 17
Use:
The boiler has been constructed according
to current technical standards and the most
stringent safety rules. Despite this, improper
use may endanger persons and property as
well as damaging the boiler itself.
This boiler has been designed as a thermal
generator for closed-loop central heating
systems and for the production of domestic
hot water.
This boiler is only for heating water to a
temperature below that of boiling point at
atmospheric temperature.
Any use different from those outlined herein is
to be considered improper. The manufacturer/
supplier declines any responsibility for
damage or injury caused by improper use.
Use of the boiler according to its design also
means respecting the instructions given in
the operation and maintenance manuals
and observing the general inspection and
maintenance conditions.
General requirements
• Installation must only be performed by
qualied and licensed personnel. They also
assume responsibility for correct installation,
adjustment and commissioning.
Adjustment, maintenance and repair of the
boiler must only be performed by qualied
and authorised personnel.
• Do not install the boiler in environments
containing dust or strong vapours.
The presence of substances such as uorine,
chlorine, sulphur etc. (e.g. vapours from
sprays, solvents or detergents, paints,
adhesives or fuels) may cause the boiler’s
components or combustion gas evacuation
system to corrode and become damaged.
Avoid installing the boiler directly in
commercial/industrial premises (e.g. hair
salons, painting/carpentry workshops,
cleaning companies etc.).
• Install the device respecting the minimum
distances and spaces in Pict. 18 (also when
installing inside an enclosure).
• Mount the boiler on a solid wall.
• Ensure that there are no depressions which
could cause the boiler to stand out from the
wall.
• Ensure you do not drill into tracked cables
or piping when drilling.
COMING SOON

16
Pict. 18
Pict. 19
FASTENING THE BOILER TO THE WALL
Attach the cardboard template giving the
connection and fastening schemes to the
wall, paying attention to the boiler dimensions
and necessary clearances. (Pict. 19)
• Use a suitable bit to drill the holes indicated
by the two wall plug symbols on the template.
• Remove the template; insert the two wall
plugs in the previously prepared holes, then
hang the boiler, inserting the hooks of the
plugs in the specic holes.
Fasten the template so that its axis
coincides perfectly with that of the
boiler.
750
MURO / WALL
* =DIMENSIONE VALIDA SOLO CON KIT DEL COSTRUTTORE / DIMENSION VALID WITH THE MANUFACTURED KIT ONLY
65 107
63
68
3/4" 1/2" 3/4"
MANDATA RISCALD.
C.H. OUTPUT
INGRESSO GAS
GAS INLET
ACQUA CALDA SANITARIA
D.H.W.
6365
107
37*
1/2" 3/4"
175
RITORNO RISCALD.
C.H. INPUT
INGRESSO ACQUA SAN.
D.H.W. INLET
DIMA
TEMPLATE
18
470
230
82,5 24DS / 24BT
28-32DS / 35CN
82
340
24DS / 24BT
28-32DS / 35CN
65* 67* 65*67*

17
Pict. 20
LAYOUT OF CONNECTIONS
PLUMBING THE BOILER
Connect the water and central heating pipes to
the boiler, respecting the positions and distances
indicated (Pict. 20); take particular care when
connecting pipes to ensure they are not placed
under pressure in order to minimise the danger of
future leaks. Use appropriate tools and procedures
for tightening.
Flush thoroughly before connecting
the pipes to ensure that any impurities
present in the piping and radiators
are completely removed.
Connect the safety valve outlet so
that its operation would not cause
any damage to persons or property
• Use piping of not less than 1/2”
diameter
• Ensure that the line is always
at atmospheric pressure by using
suitable traps (do not connect pipes
directly to the valve outlet)
• Connect the safety valve outlet line
to the household grey water drainage
system
• Apply suitable protection to the
drainage line – the water carried in it
may be at high temperatures
• THE MANUFACTURER ASSUMES
NO RESPONSIBILITY FOR DAMAGE
CAUSED TO PERSONS OR PROPERTY
DUE TO OPERATION OF THE SAFETY
VALVE DO NOT USE THE PLUMBING
PIPEWORK CONNECTIONS AS EARTH
POINTS FOR ELECTRICAL EQUIPMENT.
WARNING!!!
PROTECT THE PRIMARY HEAT
EXCHANGER BY THE USE OF THE
CORROSION INHIBITOR FLUID
EXCLUSIVELY SUPPLIED BY THE
MANUFACTURER. OTHERWISE THE HEAT
EXCHANGER WARRANTY SHALL
DECAY.
• Idraterm p.100 In 1% sol. For high
temperature systems
• Idraterm p.140 In 1% sol. For low
temperature systems
456
689
102
135
55
172
117
203 118
60
EXHAUST
AIR INTAKE
65
107 107
65214 5656
82
CENTRAL
HEATING
FLOW 3/4"
GAS
INTAKE
3/4"
CENTRAL
HEATING
RETURN 3/4"
CONDENS
DRAIN
DHW OUTLET
1/2"
I MAIN
WATER
INTAKE
FILLING VALVE
239
6
D
C
B
A
E
F
G
H
E
A
B
C
D
F
5 4 3 2 1 7 8 9 10 11 12
1 2 3 4 5 6 7 8
G

18
CONNECTING FILLING TAP FOR CENTRAL HEATING ONLY BOILERS
In order to ll the system, it is sufcient to
connect the supplied ball valve to the 1/2”
DHW intake and connect this to a water pipe.
Pict. 21
FILLING THE SYSTEM
CONNECTING THE CONDENSATE LINE
When all of the boiler connections have
been plumbed in, it is possible to proceed
to ll the central heating circuit. Perform the
operation slowly to help all air bleed out of
the system. When lling, check all the internal
and external parts of the system to make sure
they are perfectly tight.
• Open the bleed valves on the radiators.
• Gradually open the lling loop cock Pict. 22,
ensuring that any automatic air bleed valves
installed on the system are working correctly.
• Close the radiator bleed valves as soon as
water starts to come out.
• Check on the boiler pressure gauge that
a pressure of between 1.3 and 1.6 bar has
been reached.
• Close the lling loop.
Perform the lling and topping
up of the system with the boiler
completely off and all parts at
ambient temperature.
Always close the filling loop
cock once you have nished the
operation.
Filling ball valve
Pict. 22
The GIMAX PLUS boiler is already tted with
a condensate trap to avoid the combustion
products entering the environment it is
installed in.
The boiler’s connection to the condensate
line must be inspectable and must drain into
the household waste-water drainage system
with a minimum fall specied by applicable
regulations. There must be no points where
standing water can form and no narrowing
which could impede the ow.
An open type connection must be used
to ensure that any formation of ice in the
drainage system does not impede the
condensate flow. Pict. 23 shows how to
connect the trap to the household drainage
system.
Pressure gauge
Filling loop cock