COMBAT
®
CTU UNIT HEATERS INSTALLATION OPERATION AND SER VICE MANUAL
34 of 46
SECTION 15: CONVERSION BETWEEN GASES
15.1 General
Convers
ion between gases will require a change of
burner injectors and the gas valve re-commissioning
to the new conditions.
15.2 Burner Conversion
Convers
ion of the burner assembly from one gas to
the other is the same for all types of heaters.
1. Re m o ve t
he burner compartment cover as
shown on Page 40, Section 17.2.
2. Remove t
he connection between the gas valve
outlet and the manifold. See Page 39, Section
17.1 for gas valve removal
.
3. Remove t
he manifold from the burner assembly
by removing the screws at the top and bottom.
See Page 41, Section 17.2
.1.
4. Remove t
he main burner injectors.
5. Replace wi
th the injectors for the new gas
ensuring a gas tight seal.
6. Refit all components in revers
e order.
15.3 Gas Valves
All gas valves
used on the CTU have pressure
regulators that may be set to operate on natural gas
or LPG.
Convers
ion is carried out by re-setting the burner
pressure to the value in the data table during
commissioning. See Page 11, Section 5.4.
Ensure t
hat the gas inlet pressure to the heater is
correct for the new gas, and that the gas supply has
been purged of the old gas.
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