Installation and Operation manual ETHOS 36C and ETHOS 54C –1511/05-issue1
Page 5
2.4 Introduction
This Installation and Operating manual is for the installer and the user of the ETHOS boiler.
It contains essential information for installing and adjusting ETHOS boilers. We recommend that you first consult this
installation manual, to ensure that the installation is carried out correctly. In addition, it is required that the end user of the
boiler be fully instructed on how it operation, and that the installation and operation manual be left near the boiler to make
it immediately available for later use, if necessary.
2.5 Operation of ETHOS Boiler
This ETHOS; is a high efficiency, condensing, combination Boiler. Flues are cooled below condensation point by a
Spiranox heat exchanger made of stainless steel. This produces an additional heat which will contribute to the boiler
efficiency, which is in excess of 107%. The European calculation method assumes 100% efficiency for appliances
which do not condense and efficiencies higher than 100% for condensing appliances.
Since flue gases are very low in temperature (lower than 75°C), a stainless steel or PP plastic approved flue pipe
must be used.
The appliance is manufactured in according with the European approved requirements (EC) and has the following
Dutch Gastec Gaskeur quality marks: Clean combustion (SV) – 107% High Efficiency (HR) – Comfort Hot Water
(CW) –,High Efficiency Hot Water (HRww) and – Solar Boiler Reheater (NZ).
2.6 Control
The boiler can be controlled using a conventional volt free time clock, room thermostat or by a modulating
OpenTherm® room thermostat.
The boiler is fully modulating to help maintain a constant heat temperature both in the house and for the hot water
production temperature.
2.7 Combustion products
Due to the modulating premix burner, the combustion complies with the strictest European standards.
2.8 Variable fan
A speed-controlled fan is used to reduce power consumption: when the heat requirement is low, the fan will rotate
more slowly, resulting in lower power consumption.
2.9 On/off pump
The appliance has a pump with speed switch. (Attention! Do not use on position 1).
2.10 Description of appliance
The appliance is a combination boiler suitable for Domestic Hot Water (DHW) production and Central Heating
installation.
The boilers are range rateable. The maximum heat output can be set and adjusted to the requested heat output of the
central heating.
2.11 Ethos …C
This appliance has a built-in low water content DHW heat exchanger spiral for hot water production. All
connections are internal, while a flow restrictor provides a maximum hot water flow with a DHW temperature of
approx. 60°C (table 3, page 10).
The tap water temperature is set to 60°C to prevent Legionella contamination.
Note: The 54C boiler has no flow restrictor fitted.
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