Installation, user and maintenance manual
– AY Condensing line, AY series
27
Figure 4�1 – Clearances
sample minimum clearances.
LEGEND
* dimensions in mm.
4�3
HYDRAULIC CONNECTIONS
General indications
The hydraulic plant may be created using pipes in stainless steel, black steel,
•
copper or crosslinked polyethylene suitable for heating and cooling plants. All
water pipes and connections must be adequately insulated in accordance with
current norms, to prevent heat dispersion and the formation of condensate.
If glycol antifreeze is to be used (see Paragraph 4.6 FILLING THE SYSTEM CIRCUIT
•
(APPLIANCE)
→
32), DO NOT USE galvanised pipes or pipe fittings as they are
subject to potential corrosion phenomena when glycol is present.
If using rigid pipes, use vibration damping couplings at the water and gas con-
•
nections on the appliance's service plate to prevent vibration.
The components described below, to be fitted in proximity to the appliance, are il-
lustrated in the typical hydraulic plant schemes in Figures 4.2 Diagram of hydraulic
system (type with single appliance)
→
29 and 4.3 Diagram of hydraulic system (type
with several appliances)
→
30.
VIBRATION DAMPING COUPLINGS
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PRESSURE GAUGES (range 0-3 bar).
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FLOW REGULATION VALVE (shutter or balancing).
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WATER FILTER with mesh MIN 0.7 mm and MAX 1 mm.
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BALL CHECK VALVE (also to be fitted on the gas supply line).
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EXPANSION TANK on system common circuit or each individual appliance:
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the appliance is equipped with its own expansion tank on the machine’s internal cir-
cuit. the system circuit thus requires a separate expansion tank, sized in relation to the
maximum heat range and the maximum operating pressure of the water in the plant
(see the figures for reference mentioned above).
WATER CIRCULATOR on system common circuit or each individual appliance:
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chosen to meet the system specifications.
INERTIAL TANK (OPTIONAL) or accumulator tank:
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