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HYDRAULIC INSTALLATION
Installation, user and maintenance manual – AY Condensing line, AY Series
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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 underfloor heating, parameters "156" and "157" must be set
to limit the user's options in setting 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 monoethylene glycol solution sufficient to enable storage down to
-30°C. Any topping up of the initial charge must restore 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 internal 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 electrical 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 tech-
nician. These special parameters may be configured, when so required, only by the Robur TAC or the installation technician,
when authorised to do so.
