andrews CWH120/200, Инструкция по установке, эксплуатации и обслуживанию

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MAXXflo Water Heater
12 12
CONDENSE DRAIN
Condensation is formed in the heater and this must be
continuously discharged into a drain. A trap is supplied
which should be connected into a drain via a tundish or
air break. The condense flow must not be allowed to block
otherwise the heater will fail to work correctly.
An air break is required downstream of the trap
to protect the water heater from blockages and
subsequent damage.
Each 30kW module could produce up to 3 litres of condense
per hour while at full load.
SECONDARY RETURN CIRCULATION PUMP
An additional connection for a secondary circulation is
available in the top of the heater that is located between
the hot flow and cold feed ports. We would recommend that
a non-return valve is fitted in the return line.
If a secondary return circuit is fitted with a secondary
pump, please ensure that the flow-rate or heat loss does
not exceed the heater maximum flow-rate or minimum
load. An excessive flow in the secondary circuit could result
in a temperature mixing effect in the heater storage vessel
resulting in a stored water temperature less than the set
temperature (see table below).
Model Type CWH30 CWH60 CWH90 CWH120
Maximum
0.9 1.8 2.7 3.6
flow rate m
3
/h
Minimum load
kW
6 12 18 24
Circulation Pump
Secondary
Return Line
Cold Water
Fig 2
SECTION 3 • INSTALLATION