First Start-Up - BIEMMEDUE BH 50 GAS Manual De Instrucciones

The gas supply pipe must be properly sized, conform to the installed
thermal power, and guarantee the necessary conditions for gas
supply.
Warning
The gas supply pressure must be guaranteed during
heater operation and not with the heater off.
The space heater has a gas ramp with: gas filter, pressure regulator,
safety electrovalve, work electrovalve, pressure stabilizer, pressure
valve.
It is good practice for the installer to set up the supply line as
follows:
1: filter-pressure regulator of filter
2: antivibration joint
3: stopcock
4: gas ramp
Parts (1), (2) and (3) are available as accessories and are not
supplied with the heater.
When the line has been connected:
• Bleed the gas supply pipe;
• Check that the gas pipe is sealed.
• Open the gas stopcock and check the seal of all connections to
the heater.
4.5. CONNECTING BURNER TO "SNORKEL" AIR INTAKE AND
SETTING COMBUSTION AIR
The burner air intake (3) can be connected outside the room to be
heated in order to suck in clean air and avoid depleting the oxygen
in the room.
The connection pipe must be rigid to prevent shrinking due to air
intake depression. It must have a minimum diameter of 100 mm and
maximum length of 6 metres.
4.6. CONNECTION TO EXHAUST DUCT
Exhaust ducts must be in steel and conform to EN 1443.
Efficient combustion and trouble-free working of the burner depend
on efficient flue draft. The unit must be connected to the chimney
flue in compliance with current legal regulations and in line with the
following guidelines:
• the flue must be as short and possible and with ascending slope
(minimum height 1 m);
• There should be no sharp curves in the pipes, and the diameter of
the pipes must never be reduced;
• there must always be a wind deflector to prevent the entrance of
rain and to prevent smoke from being blocked by the wind;
• Flue draft must at least equal the level in the Technical
Specifications.
• Every heater must have its own chimney;
The following diagrams show possible flue positions:
L-L 195.04-BM
EN
A) Minimum 1 m
B) As short as possible
C) Minimum 1 m
D) Chimney draught H shape

4.7. FIRST START-UP

The heater is set up for one of the operating categories on Tab. I:
the adhesive label on the gas valve group (4) indicates the appliance
category (usually category I
Before starting the heater, consult Tab. I to identify the work
category made compulsory by European and national reference
standards and corresponding to the country of installation.
Warning
If the work category is incorrect, you MUST recalibrate the
burner
Specifically:
• If indicated in Tab. I, fit or remove the calibrated diaphragm (a);
SIT 830 valve
, G31 / 37 mbar).
3P
Honeywell VR 420 valve
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