Hooking Up To The Gas System; Discharging The Products Of Combustion Under A Suction Hood; Pressure Check; Adjusting The Minimum Thermal Capacity - Hobart G1009 Installation, Use And Maintenance Instruction

2.7

HOOKING UP TO 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 burner on
- The unit 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.
2.7.1

DISCHARGING THE PRODUCTS OF COMBUSTION UNDER A SUCTION HOOD

UNIT TYPE: A
The gas unit should be positioned under a suction hood whose system must have specifications in conformity with the
standards. This unit needs at least 2 m
accordance with current standards.
2.8

PRESSURE CHECK

Caution: If the "dynamic" pressure of the gas upstream from the unit is lower than the minimum pressure of Table II, hooking
up is prohibited and, furthermore, the installer 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.
INCOMING PRESSURE CHECK (Pe) Fig. 6
The pressure is measured with a pressure gauge 0 ÷ 80 mbars (precision at least 0.1 mbars). The pressure test point Fig. 6 is
on the G 3/4" gas ramp behind the instrument panel; undo the screw (A) of the pressure test point (B), attach the silicone
rubber hose to the pressure gauge, ignite the burner (Fig. 1 pos. T) and note the incoming "dynamic" pressure. Fasten the
screw (A) back on with a gas washer (C), check there is no leakage with the soap solution method.
CHECKING THE NOZZLE PRESSURE (Pi) Fig. 9
The pressure test point is below the nozzle holder .
The silicone rubber is suitable for high temperatures, but it should be protected with tin foil to prevent it burning.
2.8.1

ADJUSTING THE MINIMUM THERMAL CAPACITY

The right minimum thermal capacity is obtained with the "calibrated" by-pass minimum screw firmly tightened in accordance
with Table II. Ignite the burner as described in Sect. 6 "User Instructions" on the maximum position ( ); after approximately
15 minutes of pre-heating, turn the knob onto the minimum position (
screw should be fully screwed into its seat.
2.9

LIQUID GAS OPERATION CHECK

Check whether the fitted nozzles correspond to the information of Tables II Sect. 2.6
Check whether the incoming pressure corresponds to the information of Table II.
Make sure that the L.P.G. system has two pressure regulators of sufficient capacity and that the evaporation capacity is
sufficient. See also the publication entitled "Installation Instructions and Specifications of LPG systems.".
2.9.1

OPERATION CHECK

- Set the unit working in accordance with the user instructions.
- Make sure there are no gas leaks following the local procedures.
- Check the ignition and inter-ignition of the pilot burner and main burner.
- Make sure the flue gases are discharged properly.
- Write on a sticker, to stick onto the unit data plate, the gas and pressure for which the unit has been regulated.
2.10

INTRODUCTION TO THE USER

Explain the operation and use of the unit to the user by referring to the instructions booklet and illustrate any changes. Leave
the instructions booklet with the user and explain he needs it for further reference.
GB
3
/h • kW T.C. (Thermal Capacity). Check the ventilation in the kitchen. It must be in
- 16 -
). For the 2nd and 3rd Families, the by-pass minimum