33
9.3.2
WORKED EXAMPLE – MECHANICAL INLET/MECHANICAL DISCHARGE (MINIMUM COMBUSTION AIR
FLOW RATE)
Lochinvar CP-M+100
Heat input (net):
=
92.0 kW
Minimum combustion air flow rate:
=
92.0 x 2.6 m
3
/h
=
239.2 m
3
/h
Difference between inlet and extract air (maximum value): =
92.0 x (1.35 + 0.18) m
3
/h
=
140.76 m
3
/h
Difference between inlet and extract air (minimum value): =
92.0 x (1.35 - 0.18) m
3
/h
=
107.64 m
3
/h
Extract air (maximum value):
=
239.2 m3/h - 107.64 m
3
/h
=
131.56 m
3
/h
Extract air (minimum value):
=
239.2 m3/h - 140.76 m
3
/h
=
98.44 m
3
/h
9.3.3
WORKED EXAMPLE – MECHANICAL INLET/MECHANICAL DISCHARGE (ALTERNATE COMBUSTION
AIR FLOW RATE):
Lochinvar CP-M+100
Heat input (net):
=
92.0 kW
Minimum combustion air flow rate:
=
92.0 x 2.6 m
3
/h
=
239.2 m
3
/h
Actual combustion air flow rate:
=
92.0 x 3.15 m
3
/h
=
289.8 m
3
/h
Difference between inlet and extract air (maximum value): =
92.0 x (1.35 + 0.18) m
3
/h
=
140.76 m
3
/h
Difference between inlet and extract air (minimum value): =
92.0 x (1.35 - 0.18) m
3
/h
=
107.64 m
3
/h
Extract air (maximum value):
=
289.8 m
3
/h - 107.64 m
3
/h
=
182.16 m
3
/h
Extract air (minimum value):
=
289.8 m
3
/h - 140.76 m
3
/h
=
149.04 m
3
/h
10.0
WATER CONNECTIONS
10.1
FLOW/RETURN CONNECTIONS
There are two tee-pieces supplied with the boiler, these are for enlarging the flow/return connections to the boiler and for installing
a pressure relief valve (not supplied) and a drain valve (not supplied). It is recommended that isolation valves are fitted to the
boiler flow and return connections to allow the appliance to be isolated from the system when required.
The boiler has no internal relief valve; therefore a suitably sized pressure relief valve must be fitted to the boiler flow
connection.
10.2
OPEN VENTED SYSTEM ARRANGEMENT
The Lochinvar CP-M+ can be used in an open vented arrangement provided that a vent pipe in accordance with CP 342 or
BS6644 as appropriate is fitted.
The minimum static head requirement for an open vented system is 1.0 bar.
The appliance is fitted with a water pressure sensor and requires a nominal system pressure of 1.0 bar. The burner control will
block the boiler from operating if the system pressure drops below a pressure of 0.8 bar; once the system pressure rises above
1.0 bar, the block will be lifted. The maximum system pressure with the standard pressure sensor is 4.0 bar however, a pressure
switch may be used if the static head exceeds this. For further details on the connection of a water pressure switch, please refer
to
Section 11.0: ELECTRICAL SUPPLY
Содержание CP-M Series
Страница 5: ...5 2 0 PRINCIPAL PARTS FIGURE 2 1 REMOVABLE COMPONENTS CP M 60...
Страница 6: ...6 FIGURE 2 2 REMOVABLE COMPONENTS CP M 60 CONTINUED...
Страница 8: ...8 FIGURE 2 3 REMOVABLE COMPONENTS CP M 80 CP M 100...
Страница 9: ...9 FIGURE 2 4 REMOVABLE COMPONENTS CP M 80 CP M 100 CONTINUED...
Страница 11: ...11 FIGURE 2 5 REMOVABLE COMPONENTS CP M 120...
Страница 12: ...12 FIGURE 2 6 REMOVABLE COMPONENTS CP M 120 CONTINUED...
Страница 14: ...14 FIGURE 2 7 REMOVABLE COMPONENTS CP M 150 CP M 180...
Страница 15: ...15 FIGURE 2 8 REMOVABLE COMPONENTS CP M 150 CP M 180 CONTINUED...
Страница 94: ...94...
