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

Page: 29 / 100

End user section
Ed. 2014-08
25
Connecting the appliance before it is used again (to be carried out by the
installation technician)
Before starting this procedure, the hydraulic system installation technician must:
- ascertain whether the appliance requires any maintenance operations (contact your
authorized Robur Technical Assistance Centre (TAC) or consult Paragraph 5.2
"MAINTENANCE", on page 73.
- fill the hydraulic circuit if it has been emptied, following the instructions given in
Paragraph 3.5 on page 39;
- if the hydraulic circuit has not been emptied, check that the water content of the plant
is correct; if necessary, add the right amount of water, making sure that the plant
contains the minimum amount Paragraph 3.5 on page 39)
- if necessary, add antifreeze inhibited monoethylene glycol (free of impurities) in a
quantity in proportion to the MINIMUM winter temperature in the area of installation
(see Table 13, page 40);
- bring the plant to the correct pressure, making sure that the pressure of the water in
the plant is not less than 14.5 PSIg and not over 29.0 PSIg;
You will need: the appliance disconnected from the gas/electricity supply
5. open the plant gas supply valve and check that there is no smell of gas (indicating
possible leaks);
if you smell gas, close the gas valve again immediately without operating any
other electrical device and, from a safe place, request the assistance of
professionally qualified personnel.
6. if no smell of gas is detected, connect the appliance to the electricity supply via the
external switch provided by the installation technician in the appropriate panel (set the
"GS" switch to the "ON" position - see Figure 17, page 53);
7. if the appliance is to be connected to a Direct Digital Controller (DDC), provide power
to the DDC;
8. check that the hydraulic plant is suitably sized to guarantee the correct water flow;
9. switch on the appliance using the appropriate on/off commands (or via the DDC if
connected and in controller mode).