40
To modify a parameter in menu 4, to access the menu (installation technician only) you
are first prompted for a password. For the password, contact the Robur TAC or
Techni-
cal Service Department
of Robur S.p.A. (Tel. +39.035.888111).
The special key allows the knob of the electronic board to be operated without ope-
ning the cover of the electrical panel, so that operators are protected from live com-
ponents. When the necessary settings have been completed, put away the special key,
replace the cap on the aperture of the electrical panel and refit the front panel of the
appliance.
SPECIAL PARAMETER SETTINGS
The appliance is a Range Rated boiler: the power delivery of the appliance can be
adapted to the real system requirements by regulating the nominal gas flow (nominal
thermal input).
The thermal input can be regulated with parameter "180" in menus 4 and 5. The pa-
rameter has a range from maximum (34.9 kW) to minimum (8.0 kW) thermal capacity
(see also Table 2.1 TECHNICAL CHARACTERISTICS
→
11).
If multiple appliances are connected to the system, the value of parameter "180" must
be the same for all appliances.
To prevent errors in setting the hydraulic parameters available to the user in menu 3,
we recommend setting the maximum water temperature setpoint, both at the outlet
(parameter "156") and the intake (parameter "157"), accessible in menu 5 (and hence
for the Robur TAC only). For example, if the appliance is used on a system for underflo-
or heating, parameters "156" and "157" must be set to limit the user's options in set-
ting temperature setpoint parameter "161" (also available in menu 3) and thus prevent
operational settings outside the installation design limits.
The appliance’s internal circuit is factory charged, ad hoc, with a glycol solution suffi-
cient to enable storage down to -30°C. Any topping up of the initial charge must resto-
re the optimal water/glycol mix (50/50).
However, parameter "180" allows the appliance to be configured for operation with
pure water or a non-optimal glycol solution (value “0”: no glycol in the machine’s inter-
nal circuit); in this case the antifreeze function will activate the internal water circulator
to keep the water temperature above +4°C. Within the limits of the design minimum
ambient temperature it may be necessary, in such cases, to ensure continuous electri-
cal power to the appliance even during periods of disuse.
Parameter "156" is to be used ONLY by the Robur TAC; parameters "180" and "182" are
also available to the installation technician. These special parameters may be confi-
gured, when so required, only by the Robur TAC or the installation technician, when
authorised to do so.
