26
When selecting flue gas systems, it is essential that the minimum requirements are met therefore only flue gas materials having
the same or better properties than this table shall be used.
8.3
INSTALLATION PRECAUTIONS
The approved flue system is rated to 120
C max.
The boiler must not be operated unless the complete flue system is installed. This includes the boiler connections, twin-
pipe conversion kit (if required) flue pipes, air ducts (if required) and terminals. If discharging at low level, a suitable flue
guard must be installed.
During assembly of the flue system, precaution should be taken to ensure that the internal sealing ring is seated
correctly.
Due to the close tolerances in the flue system, it may be necessary to use a twisting action to fit the joints together. No
lubrication other than water should be used.
8.4
MAXIMUM LENGTH – CONCENTRIC FLUE
The maximum length of the flue system is determined by the resistance of the components within the flue.
The resistance must
not exceed 200 Pa.
CP-M+60
(80/125)
CP-M+80
(80/125)
CP-M+100
(100/150)
CP-M+120
(100/150)
CP-M+150
(100/150)
CP-M+180
(100/150)
Wall terminal
13
22
19
24
40
48
Roof terminal
34
61
39
45
69
86
Straight tube (m)
9
12
8
10
14
16
45° Elbow
5
7
8
9
14
16
90° Elbow
8
13
11
13
22
28
TABLE 8.3
CONCENTRIC FLUE COMPONENT RESISTANCES (Pa)
8.4.1
WORKED EXAMPLE – CONCENTRIC FLUE
CP-M+100 boiler terminating vertically with a flue run of 6 metres plus 2 x 90° elbows.
Item
Quantity
Resistance
Total
Roof terminal
1
39
39
Straight tube (m)
6
8
48
90° Elbow
2
11
22
Total Resistance (Pa)
109
TABLE 8.4
WORKED EXAMPLE – CONCENTRIC FLUE
The total resistance of 109 Pa is less than the 200 Pa maximum value therefore this is acceptable.
8.5
MAXIMUM LENGTH – CONVENTIONAL/TWIN-PIPE FLUE
The maximum length of the flue system is determined by the resistance of the components within the flue.
The resistance must
not exceed 200 Pa.
The following resistances are for single boiler flue systems only; common flue systems will require specialist design.
Summary of Contents for CP-M Series
Page 5: ...5 2 0 PRINCIPAL PARTS FIGURE 2 1 REMOVABLE COMPONENTS CP M 60...
Page 6: ...6 FIGURE 2 2 REMOVABLE COMPONENTS CP M 60 CONTINUED...
Page 8: ...8 FIGURE 2 3 REMOVABLE COMPONENTS CP M 80 CP M 100...
Page 9: ...9 FIGURE 2 4 REMOVABLE COMPONENTS CP M 80 CP M 100 CONTINUED...
Page 11: ...11 FIGURE 2 5 REMOVABLE COMPONENTS CP M 120...
Page 12: ...12 FIGURE 2 6 REMOVABLE COMPONENTS CP M 120 CONTINUED...
Page 14: ...14 FIGURE 2 7 REMOVABLE COMPONENTS CP M 150 CP M 180...
Page 15: ...15 FIGURE 2 8 REMOVABLE COMPONENTS CP M 150 CP M 180 CONTINUED...
Page 94: ...94...
