Technical data
Installation, user and maintenance manual – AY Condensing line, AY series
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If the appliances are controlled by a DDC. If the DDC manages a 2 pipe type plant (only
hot, or only cold), or a 4 pipe type plant (hot and cold), the appliance module is AL-
WAYS “active”. If the DDC is controlling a 2 pipe hot/cold system, the active module is
the one set as such on the DDC. As an example, if heatingis set on the DDC, all the hot
modules managed by the DDC will be “active”; all the cold modules controlled by the
DDC will be “passive”.
If glycol antifreeze is to be used in the hydraulic circuit, DO NOT USE galvanised pipes
and connections. Consult the notes on "Possible use of glycol antifreeze" contained
in Paragraph 4.6 FILLING THE SYSTEM CIRCUIT (APPLIANCE) → 32 and in any case the
technical specications of the glycol to be used.
The sizing of the pipes and pump must guarantee correct operation of the appliance
(for calculation of pressure drops in the appliance, refer to the technical data, Paragra-
ph 2.4 TECHNICAL DATA → 11).
The operations necessary for the rst activation or regulation of the appliance and of
the Direct Digital Controller must be carried out exclusively by an authorized Robur
Technical Assistance Centre (TAC). These operations are described in Section 6 INITIAL
ACTIVATION AND MAINTENANCE → 63.
The products’ guarantee is void if initial activation is not carried out by a Robur TAC.
The following gures show examples of typical hydraulic circuits, composed of a single
or multiple appliances.
For further information and technical support regarding other congurations, contact
Robur S.p.A. Presales. (tel. 035 888.111).
Figure 4.2 – Diagram of hydraulic system (type with single appliance)
Example of hydraulic plant diagram for connection of no. 1 AY00-120 unit.
LEGEND
1 anti-vibration coupling
2 pressure gauge
3 ow regulator valve
4 water lter
5 check valve
6 system water circulator
7 system expansion tank
8 DDC
9 AY00-120 stand-alone