System Details - Chappee EDENA CLASSIC E 35 Installation And Servicing Instructions

5.0 SYSTEM DETAILS

5.1 Primary Circuit
1. The appliance is suitable for fully pumped systems
only. The system can be open vented or sealed.
2. A sealed system must incorporate the following :
• Safety Valve
• Pressure Gauge
• Expansion Vessel
• Filling Point
Treatment of Water Circulating System
• All recirculatory water systems will be subject to corro-
sion unless an appropriate water treatment is applied.
This means that the efficiency of the system will
deteriorate as corrosion sludge accumulates within the
system, risking damage to pump and valves, boiler noise
and circulation problems.
Failure to flush and add inhibitor to the system may
invalidate the appliance warranty.
• It is important to check the inhibitor concentration after
installation, system modification and at every service
in accordance with the manufacturer's instructions.
(Test kits are available from inhibitor stockists.).
5.2 Bypass
1. The boiler is fitted with a pump overrun device which
allows the removal of residual heat from the boiler. The
system design must therefore always provide an open
circuit to allow water circulation between the boiler flow
and return.
2. Any bypass must be capable of allowing a minimum
flow rate of 8l/min and be able to dissipate at least
2kW.
5.3 System Control
1. The boiler is intended for use in a heating system that
incorporates external controls, i.e. a minimum of a
timer device.
2. For optimum operating conditions and maximum
economy the fitting of room and cylinder thermostats
is recommended.
3. The boiler should be controlled so that it operates on
demand only.
7 Réf. : CH - 1254 - I - 0 - EN