3
The remeha Gas 3c ECO boiler is a fully condensing
atmospheric gas boiler, with stainless-steel atmospheric
burners.
The boiler meets the requirements of the CE regulations
at the following directives:
- Gas appliance directive
no. 90/396/EEC
- Efficiency directive
no. 92/42/EEC
- Electrical low voltage directive
no. 73/23/EEC
- Machinery directive
no. 89/392/EEC
- E.M.C. directive
no. 89/336/EEC.
Suitable for all qualities of natural gas and propane.
Cat.
II
2H3p
* On request extension cables can be delivered, so that
the gas train can be fitted on the opposite side to the
instrument panel, thermostat pocket and the flow.
1. BOILER DESCRIPTION
Classification type for evacuation of the combustion
products: B23
For further advice or information contact Broag Ltd.
The remeha Gas 3c ECO boiler is fitted with electronic
ignition and is supplied complete with an insulated
casing. Water connections Ø 70 mm.
2. CONSTRUCTIONS
2.2 The burners
The burners are stainless steel, atmospheric burners.
They guarantee a low noise level.
2.3 Boiler floor
The remeha Gas 3c ECO boiler is supplied as standard
with reflecting floor plates which allows for ventilation
underneath.
2.4 Assembly
The boiler is delivered in sections for assembly on site.
2.1 General
- Boiler block (primary heat exchanger) of cast iron
sections connected with conical nipples.
- Economiser (secondary heat exchanger) of anodised
aluminium.
- Gas train can be fitted on the left or right hand side of
the boiler.
- Water connections can be fitted on the left or right hand
side of the boiler. The return is fitted as standard on the
left hand side of the economiser.
The gas train should always be fitted on the same side
as the instrument panel and the flow connection*.
- Instrument panel is fitted in the front casing.
- The boiler block (primary heat exchanger) is cleaned
from the top.
The economiser (secondary heat exchanger) is
cleaned from the top rear side.
3. BOILER EFFICIENCY
3.1 General
The remeha Gas 3c ECO can operate with exceptionally
low return water temperatures (down to 20
°
C) and in do-
ing so extracts the maximum efficiency by creating con-
densation within the economiser so releasing the latent
heat from the flue gases. By raising the return water tem-
perature via the economiser the boiler block is protected
at all times, and heat to water efficiences of 86% (G.C.V.)
are can be attained.
3.2 Condensation
Condensation will take place within the economiser when
return temperature drops below 55
°
C. Above this tempe-
rature no condensing takes place and the latent heat is
not released. Even so, efficiencies well in excess of 95%
are still achieved.
Fig. 01 Relationship between boiler efficiency and return
boiler water temperature
