Clearances; Gas Supply; Service Pipes; Meters - Lochinvar LBF81 Installation, Commissioning & Maintenance Instructions

6.3

CLEARANCES

The location chosen for the equipment must permit the provision of a satisfactory flue system and, where
necessary, an adequate air supply. The location must also provide adequate space for servicing and air
circulation around each unit. This includes any electrical trunking laid across the floor and to the appliance.
See Table 2.4 and 2.5 for clearances. See Table 8.1 for details on flue terminal locations.
7.0

GAS SUPPLY

The Lochinvar LBF range is suitable for use on second and third family gasses 2H - G20 - 20mbar and 3P - G31 -
37mbar. Details relating to Natural Gas (2H) appear below; for details relating to Propane (3P) please refer to
Section 13: LPG FUEL.
7.1

SERVICE PIPES

The local gas distributor must be consulted at the installation planning stage in order to establish the availability of
an adequate supply of gas. An existing service pipe must not be used without prior consultation with the local gas
distributor.
7.2

METERS

A new gas meter will be connected to the service pipe by the local gas distributor contractor. An existing gas
meter should be checked, preferably by the gas distributor, to ensure that it is adequate to deal with the rate of gas
supply required.
7.3

GAS SUPPLY PIPES

Supply pipes must be fitted in accordance with IGE/UP/2. Pipework from the meter to the equipment must be of
adequate size. The complete installation must be purged and tested as described in IGE/UP/1. Refer to Section
13: LPG FUEL for information on LPG pipework installation guidance.
7.4

BOOSTED SUPPLIES

Where it is necessary to employ a gas pressure booster, the controls must include a low-pressure cut-off switch at
the booster inlet. The local gas distributor must be consulted before a gas pressure booster is fitted.
7.5

PLANT-ROOM CONTROL VALVE

A manual valve for plant-room isolation must be fitted in the gas supply line. It must be clearly identified and
readily accessible for operation, preferably by an exit.
7.6

EQUIPMENT GAS SYSTEM LEAK CHECK

An approved gas-inlet appliance isolating valve and union should be installed for each unit in a convenient and
safe position and be clearly marked. Ensure that the gas-inlet appliance isolating valve is in the OFF position.
Although the equipment receives a gas leak check and gas train component integrity check prior to leaving the
factory, transit and installation may cause disturbance to unions, fittings and components. During commissioning
a further test for tightness should be carried out on the equipment gas pipework and components.
Care must be taken not to allow leak detection fluid on or near any electrical parts or connections.
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