Technical data

78
Table 7.1
GUIDELINES FOR THE PREVENTIVE MAINTENACE OPERATIONS
Check of the unit GAHP-A GAHP-GS/WS AY ACF GAHP-AR
Visually check of the general condition of the unit and of its air heat exchanger.
(1)
√ √ √ √
Check the correct operation of the device used for monitoring the water flow √ √ √ √ √
Check the % value of CO
2
√ √ √
check gas pressure to the burners √ √
Check that the condensate discharge is clean (clear the condensate discharge hole of any blockages)
[If necessary, frequency of the maintenace operation must be increased]
√ √ √
Replace the belts after 6 years or 12,000 hours of operation √ √ √ √
Check/restore the pressure of the primary hydronic circuit √
Check/restore the air pressure inside of the expansion vessel of the primary hydronic circuit √
Check every CCI or DDC
(2)
DDC o CCI
Check that the plant is able to achive the setpoint temperature √
Download the hystorical events √
1 It is suggested the cleaning of the air heat exchanger once every 4 years [the optimal frequency of this operation is in any case a consequence of the installation site].
2 Check that the plant is able to achive the setpoint temperature.
ORDINARY SCHEDULED MAINTENANCE
Perform the following operations at least once every 2 years.
If the unit is subject to particularly heavy duty (for example in process plants or in
other conditions of continuous operation), these maintenance operations must be
more frequent.
Table 7.2
SCHEDULED MAINTENANCE OPERATIONS TO BE PERFORMED AT LEAST ONE EVERY TWO YEARS
Check of the unit GAHP-A GAHP-GS/WS AY ACF GAHP-AR
Clean the combustion chamber √ √ √ √ √
Clean the burner √ √ √ √ √
Clean the electrodes of ignition and flame sensing √ √ √ √ √
Check that the condensate discharge is clean (clear the condensate discharge hole of any blockages) √ √ √
Replace the silicone gasket √
In Section 5 HYDRAULIC INSTALLATION → 26 are reported suggestions related to the
hydraulic plant.
7.3 CHANGE OF GAS TYPE
This operation must be carried out exclusively by an authorised Robur Technical Assist-
ance Centre (TAC).
If the appliance is to be used with a type of gas other than that indicated on the the adhe-
sive label located on the unit's electric panel, switch off the appliance, shut off its power
and gas supplies and proceed as follows (see Figure 7.2 Gas changeover → 80):
You will need: the appliance switched off and disconnected from the gas/electricity
supplies
Disconnect the gas pipe from the gas valve.1.
Undo the 4 bolts E shown in Figure 7.2 Gas changeover 2. → 80 and remove the gas
valve/blower assembly from the burner.
Protect the burner from bolts and nuts falling into it.3.
Using a CH 4 hex key, undo the 4 bolts G indicated in Figure 7.2 Gas changeo-4.
ver → 80 and remove the nozzle D from the gas valve.