1. Turn off the electric power and gas supply to the boiler.
2. Remove the two screws holding the sight glass in place.
3. Remove the four components of the sight glass and wipe the glass clean.
4. Before you reassemble the sight glass, check that the gaskets are in good condition.
5. Assemble the components (see image below), by first inserting the rubber gasket
l
inside
the refractory top
m
followed by the glass
k
, and then the graphite gasket
j
.
Figure 47
Four components of the sight glass
6. Replace onto the lid, and fasten with the two screws.
7.5 Cleaning the condensate trap
Warning
If condensate neutralization is used, check the pH level of condensate before and after
neutralization to verify effectiveness and ensure that the discharge has neutral pH levels.
Never operate the boiler unless the trap is filled with water. Failure to comply will result in
severe personal injury or death.
82
Section: Service and maintenance
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