Operating Instructions and Installation Instructions

VARINO GRANDE 350 - 600
We reserve the right to make changes to dimensions and construction 16 Edition 10.07.2015
© Copyright YGNIS AG CH-Ruswil
6.8. Gas connection
This condensing boiler was set in the factory to operate using the gas specified on the gas setting label.
Please obtain an adaptation kit as per the following table, for use with any other type of gas:
350 – 450 kW
500 – 600 kW
AT / CH
ES / GB IT
G20
406063
406064
G31
406401
406402
BE / FR
G20 / G25
406063
406064
G31
406401
406402
DE
G20
406063
406064
G25
406339
G31
406401
406402
LU
G20
406063
406064
NL
G25
406339
G31
406401
406402
ATTENTION: Any operation involving a change of gas type must be done by a
qualified professional.
The maximum gas connection pressure (flow pressure) must not exceed the value given in the chapter
"Technical data". The VARINO GRANDE is optionally also available as 100-300 mbar version. This version
comprises a gas pressure regulator with filter that is to be mounted directly on the boiler's gas train. Mounting
and regulating instructions come with the equipment.
Before the condensing unit is connected to the gas line, it must be made sure that the line has been blown
through and is free from particles and chips.
A shut-off valve must be installed in the gas supply line to the burner.
If boiler rooms without pressure relief openings are located in the basement, a shut-off device automatically
controlled by the burner may have to be fitted in the gas line (observe local regulations). In this process, the gas
supply is interrupted during operational stand-still of the burner. A supply terminal is available on the boiler for
this purpose (external gas valve).
Notes: The whole gas installation may only be carried out by a licensed installation company. Installation
must be in accordance with local regulations.
At commissioning as well as after each opening the gas train is to be checked for leakage
(leak spray).
The installation may only be operated with the intended gas quality – observe additional
plate on burner!
100-300 mbar version: Before the condensing unit is connected to the gas line, the supplied
gas pressure regulator with filter must be fitted directly on the gas train of the unit!
6.9. Electrical installation
6.9.1. Precautions
The electrical installation must be carried out by an authorised electrician from beginning to end. In carrying out
the electrical installation, local regulations as well as any standards and specifications in force must be complied
with.
Modifications to the internal wiring in the unit are not allowed without our written permission. Modifications
performed by the customer that lead to a defect in the unit or to material damage to installation components or
buildings as a result of non-observance of this instruction release the manufacturer from his warranty
observation.