Lochinvar LBF121, Installation, Commissioning & Maintenance Instructions

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11.3.1 EXPANSION VESSEL SIZING
The following information is based on an inlet pressure of 3.5 bar. If a different inlet pressure is to be used, please
consult BS6700.
V V = S V * e
0.45
Where:
V V = Vessel Volume
S V = System Volume
e = Coefficient of Expansion (See Table 10.1 )
Stored
Temp.

C
60 65 70 75
e 0.017 0.020 0.023 0.026
TABLE 10.1 COEFFICIENT OF EXPANSION OF WATER AT 3.5 BAR INLET PRESSURE
12.0 ELECTRICAL SUPPLY
Wiring external to the equipment must be installed in accordance with the I.E.E. Regulations and any local
regulations that apply.
Model
Normal Supply
Voltage
External Fuse
Rating
Power
Consumption
LBF81
230V AC
50 Hz
1 PH
6.0 A
26 W
LBF121 26 W
LBF151 67 W
LBF171 67 W
LBF221 67 W
LBF301 67 W
LBF401 67 W
TABLE 11.1 ELECTRICAL SUPPLY REQUIREMENTS
WARNING: THIS APPLIANCE MUST BE EARTHED
A suitably competent person MUST check wiring. Normal supply required is 230 VAC, single phase, 50
Hz. An isolator with a contact separation of at least 3mm in all poles should be sited close to the
equipment and must only serve that equipment. The double pole switch must be readily accessible under
all conditions.
12.1 ELECTRICAL CONNECTION
Access to the electrical connections is via the control panel. The appliance is supplied with a length of three-core
cable for connection to the mains electrical supply. If wiring in conduit is preferred, the cable and gland made into
the unit should be removed. Wiring should be completed in heat-resistant cable with a minimum cross sectional
area of 1mm
2
.
The site wiring terminal rail is marked with Live, Neutral and Earth connections. External fuses should be rated at
6A. Correct polarity must be observed for correct operation of the ignition control system.