E93.1001EN.C Manual CD
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8
Warnings and guidelines (continuation)
EHS is not liable for any damage caused by inaccurately following these mounting instructions.
Only EHS parts may be used when carrying out any repair or service works.
Do not use chlorine based products for brazing.
When commissioning the water heater, the running of the water heater pump must be checked before leav-
ing the installation.
By pressing the service button during a couple of seconds the water heater can be fired independently from
the thermostat circuit. Firing the water heater without water flow (but filled with water) will cause a boiling
noise.
The flow and return temperature are checked continuously. The temperature difference may not exceed the
programmed value belonging to the actual power mode. If it does, the water heater will go in a lock-out.
The applied DHW pump must be controlled only by the CD
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water heater control. If, for any
reason, an external pump control is applied
without written approval of EHS
, the complete war-
ranty on the CD
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water heater and all supplied parts will become invalid.
Minimum water pressure 1 bar.
Fuel used should have sulphur rates that comply with the next values: a maximum annual peak over a short
period of time of 150 mg/m
3
and an annual average of 30 mg/m
3
maximum.
Combustion air must be free of contents of chlorine, ammonia, alkali agents. The air near a swimming pool,
a washing machine or a laundry is containing these a.m. contents.
The water heater is used in combination with a hot water tank without any other heat exchanger; the water
heater should be equipped with a safety relief valve. In some cases also the tank should be equipped with
a T&P relief valve. Always apply all applicable installation standards and regulations.
The connection for a remote DHW Stat is based on an OpenTherm bus system or an on/off timer.
For correct connections of the thermostat see page 34.
At first installation, the built-in automatic air vent should be open.
LEGIONNAIRES’ DISEASE
An anti-Legionella function is present in the software but is default turned OFF.
See § 8.3 on page 38 and for the programming options § 11.2.2 on page 87.
BUTANE GAS
If a butane/propane gas mixture has to be used for this water heater the fan speed must be re-
duced by altering parameter P4BD.
See § 11.1.3 on page 84.
