Potterton NXR4 Installation, Operation & Maintenance Manual page 33

SECTION 7
PAGE 32
Fig 22 – Boiler Components
21
23
24
25
23
25
25
24
30
12
13
POTTERTON COMMERCIAL PRODUCTS DIVISION
INSTALLATION, OPERATION & MAINTENANCE MANUAL
20 22
16
12
15 23
12
14
25
14A
13 32 33
12
38
37
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34
6
9
9
9A
6
40A
40 41
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31
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REAR SECTION
5
SECTION
MA
10
24
REFRACTORY SEALANT
4
SILICONE
SEALANT
3
2
1
41A
44
NXR4
42
43
42