Laws, Regulations And Technical Directivas; Place Of Installation; Positioning; Hook-Up With The Gas System - MBM MINIMA Serie Instructions Pour L'installation, L'emploi Et L'entretien

2.2 LAWS, REGULATIONS AND TECHNICAL DIRECTIVES
The following regulations must be observed during installation:
- Current accident and fire regulations.
- The regulations of the gas supply company, which has to issue an authorization before installation.
- "Gas system installation" standards.
- "Electric system installation" standards.
- The regulations of the electric power supply company.
- Health regulations.
2.3

PLACE OF INSTALLATION

- The unit should be installed in a room with adequate ventilation. This unit needs a draw of at least 2 m
(Thermal Capacity).
- Install the unit in compliance with the safety regulations UNI - CIG 8723, Italian Law No. 46 dated 5-3-'90 and Ministerial
Decree D.M. No. 74 dtd 12.04.96
2.4

POSITIONING

- The various units may be installed separately or combined with other units in the same range.
- This unit is not suitable for encasing.
- The distance from the side walls must be at least 10 cm.; should the distance be less or the material of the walls or floor be
flammable, it is vital to install heat insulation.
2.5

HOOK-UP WITH THE GAS SYSTEM

- The unit needs to be supplied with gas with the characteristics and pressure shown in Table II.
- The gas pressure is measured at the initial pressure test point with the burners on (see Fig. 1 and).
- The oven is tested and fitted for operating with natural gas H G20 - 20 mbar.
* N.B. Should the supply pressure vary more than +10% of the nominal pressure, it is advisable to install a pressure
regulator upstream from the unit to guarantee the nominal pressure.
- Hooking up to the gas mains must be done with a metal pipe of suitable cross-section and a shut-off valve must be installed
upstream to standards.
- After hooking up to the gas mains, check there is no leakage at the fitting points with the soap solution method.
2.5.1

DISCHARGING THE PRODUCTS OF COMBUSTION UNDER A SUCTION HOOD.

UNIT TYPE: A1
The gas oven should be positioned under a suction hood whose system must have specifications in conformity with the
standards. This unit needs at least 2 m
be in accordance with current standards.
2.5.2 HOW TO OBTAIN THE NOMINAL THERMAL CAPACITY
Check whether the unit is fitted for the gas type, pressure and category corresponding to the main gas supply.
Information shown on the packing and/or unit label. If the unit is fitted for another type of gas or pressure, you first need to
transform it for working with the other kind of gas.
See Table II for the nozzle, minimum screw (by-pass) and nozzle pressure for the main burner.
N.B.: The names of nozzles "2H" and "3+" are shown on the left side of Table II.
2H = G 20 - 20 mbar
3 + = G 30 - 29 mbar and/or G 31 - 37 mbar coupled gas and pressure.
In our sector we nearly always have to deal with G 31 - 37 mbar!
Table II shows the types of gas and pressure for all burners and their nozzles, the minimum screw (by-pass), the maximum and
minimum nozzle pressure, the maximum and minimum thermal capacity and the gas consumption in l/h (15°C) or in g/h in the
case of L.P.G.
Caution: If the "dynamic" pressure of the gas upstream from the unit is lower than the minimum pressure of Table II,
connection is prohibited; furthermore, the fitter must notify the gas company that the supply pressure is too low.
N.B.: Should the pressure vary by more than +10% of the nominal pressure, e.g. for G 20 - 22 mbar it is advisable to install a
pressure regulator upstream from the unit to guarantee the nominal pressure.
Should the supply pressure exceed the maximum pressure of Table II, e.g. for G 20 - 25 mbar, notify the gas company.
Check whether the incoming and nozzle pressures correspond to the values given in Table II.
GB
3
/h • kW T.C. (T.C. = Thermal Capacity). Check the ventilation in the kitchen. It must
- 18 -
3
/h • kW T.C.