Introduction - Vaillant ECOmax VUW 236 EH Instructions For Installation And Servicing

1. Introduction

Note: This boiler must be installed and
serviced by a competent person in
accordance with the Gas Safety
(Installation and Use) Regulations
1994. In the U.K. `CORGI' Registered
Installers undertake the work to a safe
and satisfactory standard.
ECOmax is a fully automatic, wall
mounted, room sealed, condensing
(high efficiency) combination boiler
for central heating and domestic hot
water. Domestic hot water is supplied
directly from the boiler, and has priority
over the central heating. (This has the
advantage that no copper cylinder,
cold water tank, feed and expansion
tank and associ-ated pipework are
required).
The boiler has been designed for use
with sealed systems, and comes fully
tested and assembled with built-in
circulating pump, bypass, expansion
vessel and diverter valve.
The boiler, because it has a larger
heat exchanger, extracts more heat
from the flue gases. The conversion of
this otherwise wasted heat into usable
warmth means the boiler has a higher
efficiency. Because the flue gases are
reduced to such a low temperature,
the water vapour contained in them
can condense. To discharge this con-
densate a drain is provided on the
boiler, and this must be connected to
a drainage point on site.
ECOmax boilers carry the „CE" Mark.
This demonstrates that the boilers fulfill
the essential requirements of the Gas
Appliance Directive (90/396/EEC)
and the Gas Appliance (Safety)
Regulations 1992.
The boiler features a comprehensive
diagnostic system, which gives de-
tailed information on the boiler status
when operating and performance of
key components to aid in commis-
sioning and fault finding.
ECOmax range consists of models
with outputs for domestic hot water
of 22.7 and 28.3 kW. The boiler is
easily sited on any internal wall
and can be installed with either a
horizontal or vertical RSF (Room
Sealed Fan assisted) flue. Flue
extensions and additional bends and
elbows are available for increased
siting flexibility. (The boiler is not
suitable for external installation).
If desired, an inhibitor may be used
in the system. Guidance on the use
of inhibitors is contained in these
instructions. (The boiler does not utilise
aluminium in the water system and
does not require a special inhibitor).
The boiler is designed to operate on
Natural Gas only.
The boiler contains a domestic hot
water heat exchanger. The temperatu-
re in the heat exchanger is limited by
the boiler control system and it is not
normally necessary to install a scale
reducer on the cold mains inlet to the
boiler. However, in exceptionally hard
water areas to prevent scale formation
in the property hot water system pipe-
work a scale reducer may be fitted.
The data badge is fitted on the com-
bustion chamber cover.
The „CE" Mark also demonstrates
that the boilers comply with the
requirements of the Electromagnetic
Compatibility Drective
(89/336/EEC), the Low Voltage
Directive (73/23/EEC), the Boiler
Efficiency Directive (92/42/EEC)
and the Boiler (Efficiency) Regulations
1993.
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