Doc No. 700070 Page 51 of 56
7. Replacing Parts.
7.1 Removal of burner
assembly.
a: Disconnect electrical supply at burner mains inlet
connection.
b: Turn-off gas supply at service cock and disconnect union.
b1 On EVM burners, remove the vacuum tubes by releasing the
two compression fittings (14).
c: Release the slider latches (30) from the underside of the
burner base plate (1).
d: Pull lid (2) apart and upwards from base (1). Lid is
attached to back plate via 2 screws (34).
e: Remove lid by unscrewing set pins (34) from back of base
plate.
f: Remove spark electrode assembly (11) (see section 7.6)
g: Release and remove the four set screws (40) from the
combustion chamber flange.
Retain combustion chamber gasket (28).
h: Lift burner clear of combustion chamber and withdraw.
i: Remove the burner heat shield.
j: When replacing do so in the reverse order ensuring that
the gasket between the burner heat shield and combustion
chamber (28) is undamaged or replace if necessary.
k: Check for gas soundness.
7.2 Controller (3) Replacement
a: Disconnect electrical supply.
b: Release the slider latches (30) from the underside of the
burner base plate.
c: Pull lid (2) apart and upwards from base (1).
d: Disconnect wiring loom connections from controller (3a).
e: Disconnect ignition wire from controller (3b)
