Lochinvar CP-M Series User Manual

27
Item
Size
(mm)
Resistance (Pa)
CP-M+60
CP-M+80
CP-M+100
CP-M+120
CP-M+150
CP-M+180
Straight tube (per metre)
80
4.0
7.5
X
X
X
X
Straight tube (per metre)
100
1.2
3.0
3.5
4.0
X
X
Straight tube (per metre)
130
0.4
0.7
0.8
1.1
1.2
2.0
45° Elbow
80
2.0
3.5
X
X
X
X
45° Elbow
100
0.6
1.5
1.7
2.0
X
X
45° Elbow
130
0.2
0.4
0.4
0.5
0.6
1.0
90° Elbow
80
4.0
7.0
X
X
X
X
90° Elbow
100
1.2
3.0
3.5
4.0
X
X
90° Elbow
130
0.3
0.7
0.8
1.1
1.2
2.0
Vertical inlet cap
80
10.4
18.1
X
X
X
X
Vertical inlet cap
100
4.2
7.4
11.4
16.7
X
X
Vertical inlet cap
130
1.5
2.6
4.0
5.8
9.1
13.1
TABLE 8.5 AIR INLET COMPONENT RESISTANCES (Pa)
Item
Size
(mm)
Resistance (Pa)
CP-M+60
CP-M+80
CP-M+100
CP-M+120
CP-M+150
CP-M+180
Straight tube (per metre)
80
5.0
8.0
X
X
X
X
Straight tube (per metre)
100
2.0
3.5
4.0
6.5
X
X
Straight tube (per metre)
130
0.5
0.8
1.2
1.8
3.8
6.0
45° Elbow
80
2.5
4
X
X
X
X
45° Elbow
100
1.0
1.7
2
3.2
X
X
45° Elbow
130
0.2
0.4
0.6
0.8
1.9
3.0
90° Elbow
80
5.0
8.0
X
X
X
X
90° Elbow
100
2.0
3.5
4.0
6.5
X
X
90° Elbow
130
0.4
0.8
1.2
1.8
3.8
6.0
Vertical exhaust cap
80
13.8
24.0
X
X
X
X
Vertical exhaust cap
100
5.6
9.8
15.2
22.1
X
X
Vertical exhaust cap
130
2.0
3.5
5.3
7.8
12.0
17.3
TABLE 8.6 EXHAUST COMPONENT RESISTANCES (Pa)
When a conventional flue is to be used, the maximum length of the flue system is limited by the resistance of the
exhaust flue components as detailed in Table 8.6.
When a twin-pipe flue is to be used, the maximum length of the flue system is limited by the combined resistance of the
inlet and exhaust flue components as detailed in Table 8.5 and Table 8.6.
8.5.1 WORKED EXAMPLE – CONVENTIONAL FLUE
CP-M+80 boiler with a flue run of 24 metres plus 3 x 90° elbows
Option 1 80mm Flue Components
Item
Quantity
Resistance
Total
Straight tube (m)
24
8.0
192.0
90° Elbow
3
8.0
24.0
Total Resistance (Pa)
216
TABLE 8.7 WORKED EXAMPLE – CONVENTIONAL FLUE – 80mm COMPONENTS
Using 80mm flue components, the total resistance of 216 Pa is more than the 200 Pa maximum value therefore this is
unacceptable.
Option 2 100mm Flue Components
Item
Quantity
Resistance
Total
Straight tube (m)
24
3.5
84
90° Elbow
3
3.5
10.5
Total Resistance (Pa)
94.5
TABLE 8.8 WORKED EXAMPLE – CONVENTIONAL FLUE – 100mm COMPONENTS
By using 100mm components, the total resistance of the flue system is reduced to 94.5 Pa. As this is below the 200 Pa limit, this
is the flue system that should be used.

Lochinvar CP-M Series Specifications

General

Brand	Lochinvar
Model	CP-M Series
Category	Boiler
Language	English