Gruppo Imar IVY 24 MR/MN, Installation & Use Manual, Page: 4 / 44

2
CONTENTS
General requirements 2
-General Information 2
Use and operation 3
-Description of the boiler 3
-Components 3
-Ignition 4
-Interface description 4
-“Stand-by” main menu 5
-Function main menu 6
-Season selection main menu 7
-Temperature regulation 7
-Information menu 8
-Operation with room thermostat 9
-Operation with external sensor 9
-Faults 10
-Fault codes table 11
Installation 12
-Operational diagram 12
-Three-way boiler functional diagram 12
-Wiring diagram 13
-Graphs for the head available to the system 14
-Installation 14
-Fastening the boiler to the wall 15
-Layout of connections 16
-Plumbing the boiler 17
-Connecting CH filling cock 17
-Filling the system 17
-Connection to the gas supply 18
-Connection to the electrical system 19
-Combustion gas evacuation and air intake system:
compatible applications 20
-Combustion gas evacuation and air intake system:
installation 21
-Checking the effectiveness of combustion
gas evacuation 23
-Combustion gas evacuation circuit diaphragms 23
-Combustion gas evacuation system: warnings 24
Adjustment and maintenance 25
-Preliminary maintenance operations 25
-General maintenance operations 25
-SERVICE function 25
-Power adjustment 27
-Gas pressure check 28
-Checking the pressure at the burner 28
-Checking mains gas supply dynamic pressure 29
-Checking pressure at burner at max power 30
-Changing gas type 30
-Configuring the software for a change gas type 31
-Access to configuration menu 32
-Installer menu 33
-Information menu 34
-Room Thermostat/Opentherm installation 35
-Installation of external temperature sensor 36
-External temperature sensor configuration 36
-Configuring the climate curve 37
-Special functions 38
-Thermostat post ventilation function 39
-Technical Data Sheet 40
GENERAL INFORMATION
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 modified
If accessories or kits not approved by the
manufacturer are installed
If ordinary and extraordinary maintenance is not
performed by qualified 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 qualifications
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.
EC CONFORMITY DECLARATION (ACCORDING TO ISO/IEC 17050-1)
GENERAL REQUIREMENTS
G20 Engineering 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 THEA boilers are in compliance with European Directives and with European Delegates regulations.
Chief Executive Marco Rapaccioli