Robur GAHP Line AR Series, Installation, Use And Maintenance Manual

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GAHP-AR – Installation, start-up, use and maintenance manual
76
Edition: 2014-08
5.3 CHANGE OF GAS TYPE
This operation must be carried out exclusively by an authorized Robur Technical
Assistance Centre (TAC).
If the appliance is to operate with a type of gas (methane or L.P.G.) different from that
indicated on the sticker located on the internal air blower of the individual units, it is
necessary to switch off the appliance, remove the electrical and gas supplies and operate
on it as follows (see Figure 33 on page 77):
You will need : the appliance switched off and disconnected from the gas/electricity
mains
1. remove the front and left panel of the appliance;
2. unscrew the fixing screw of the gas supply pipe (F) above the electrical panel of the
appliance;
3. unscrew the hexagonal nut (see details H) that connects the brass nozzle to the
air/gas mixer; use a number 36 wrench for this purpose;
4. remove the nozzle by unscrewing the 4 screws (see detail G). Use a 9/64 hex key
wrench.
5. replace the removed nozzle with one of the suitable diameter for the gas that is to be
used (see detail C), positioning the new o-ring seal (supplied) between electro valve
and nozzle; use a 9/64 hex key wrench to fix again the screws;
6. reconnect the brass nozzle to the mixer tightening the hexagonal nut, taking care to
position the new circular seal (supplied with the kit) correctly;
7. retighten the fixing screw of the gas supply pipe (F) above the electrical panel of the
appliance;
8. supply gas and electricity to the appliance, and reactivate the appliance;
9. regulate the gas pressure to the appliance so that it is the same as that indicated in
Table 21, page 72 for the gas that is to be used, following the instructions given in
“Regulation of gas flow” on page 71. Then replace the sticker indicating the type of
gas for which the appliance was set up with one that indicates the new type of gas
used;
10. complete the gas change operation by checking that all gas pipe connections,
including those that are not directly affected by the current procedure, are correctly
sealed (use a solution of soap and water or another suitable means for this
purpose);
11. refit the front left panel and finally the front panel.