Benchmark Accolade Estate AE140D Design, Installation And Servicing Instructions page 4

Figure 1
Figure 2
DESCRIPTION
INTRODUCTION
Accolade Estate is a range of unvented hot water
storage appliances designed to provide mains
pressure hot water to comply with Section
G3 of the Building Regulations. The Accolade
Estate incorporates a twin tank design and is
housed in a pre-finished rectangular case with
all connections front mounted. The appliance
is extremely well insulated using high density
HCFC free foam insulation with an ozone
depleting potential (ODP) of zero. it is fitted
with all necessary safety devices and supplied
with all the necessary control devices to make
installation on site as easy as possible.
The twin tank configuration is important in
ensuring more usable water because the
pipework is arranged so that gravity circulation
takes place constantly around two tubes. in a
single tube cylinder some 15% of the contents,
which are below the heat exchanger, remain
unheated, and therefore at an unusable
temperature. The twin tube design of Accolade
Estate overcomes this problem and therefore
significantly reduces the risk of legionella.
Drain down is effected from the very bottom
of both tubes.
Accolade Estate is available in two basic
variants:
1. Accolade Estate Direct - For providing hot
water heated by electricity (Figure 1).
Accolade Estate Indirect - For use with gas
.
or oil boilers (Figure ).
ACCOLADE ESTATE DIRECT (Figure 1)
Accolade Estate direct is an electrically heated,
unvented hot water storage package appliance
designed primarily for use with off peak
electrical supplies.
it is supplied fitted with two 3kW immersion
heaters as recommended by the Electricity
Council and BEAB approved for safety.
Accolade Estate direct models are listed in
Table 1.
ACCOLADE ESTATE INDIRECT (Figure 2)
Accolade Estate indirect is an unvented hot
water storage package and is provided with
an internal coil which is designed for use with
a gas or oil boiler and is suitable for both open
vented and sealed pumped primary systems.
When used with a sealed heating system the
boiler must incorporate its own energy cut-out
overheat thermostat.
Accolade Estate indirect models are listed in
Table .
Page 4