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INST
ALLA
TION
TECHNICAL INFORMATION
27
Gas valve inlet test point
28
Control box containing:
External temperature probe terminal
block, remote terminal block, power
supply terminal block, external controls
terminal block
29
Primary circuit pressure switch
30
Condensate trap
31
Fan
32
Air box (air/gas mixer)
33
Ignition electrode
34
Burner
35
C.H. expansion tank
36
By-pass valve
37
Flue outlet pipe
38
Air intake pipe
39
Flue exhaust sampling point
40
Air sampling point