Supplied By www.heating spares.co Tel. 0161 620 6677
Page 14
Page 15
SY
STEMA
TE
2000
1.3 SYSTEM DETAILS
Heating System
Expansion Vessel Requirements
The SysteMate expansion vessel is pre-charged to 1.0 bar. The maximum water
content of the heating system ( rad connecting pi primary
coil but NOT store volume) must not be greater than those shown in the table
below.
A figure of 4.5 litres/kW of installed radiator capacity can be used for a preliminary
assessment of the water content of the heating system.
The values presented in the table are based on a maximum boiler flow temperature
of 93
o
C. The expansion vessel must be suitable to accommodate the change in
volume of the water in the system when heated from 10
o
C to 110
o
C as specified
in BS 5449: 1990 clause 16.2.
The primary heating coil and pipework volumes are shown in the table in 1.2
Technical Data.
In normal circumstances an initial vessel and system charge pressure of 1 bar is
suitable for most domestic purposes.
The minimum system pressure should not be less than the static head plus 0.5
bar i.e. the height of the highest point in the system above the expansion vessel
plus a margin of 0.5 bar.
If the system volume is greater than that shown in the table at the selected operating
conditions then an additional expansion vessel must be fitted.
1.0 DESIGN
‘Switch’
The SysteMate 2000 can be ordered with
the option of ‘Switch’ which provides a 9kW
electrical emergency back up in the case
of failure of the main heat source i.e. gas
boiler.
This must NOT be used to provide hot
water only in summer if the main system is
working correctly.
If Switch is ordered the electrical supply will
need to take account of the increased load.
Full details of the requirements are provided
in Section 2.1 Site Requirements and 2.2
Installation.
Otherwise the design requirements are the
same as the standard appliance.
Switch can operate on ‘hot water’ or ‘hot water
and heating’ modes. In the former only hot
water pump and electric heating element are
energized. In the latter the heating system
pump is also energized. This means that
the heating will be on permanently unless
manually switched back to the ‘hot water’ only
position.
It also means that wherever Switch is
being used the normal domestic hot water
temperature controls are over-ridden. Initially
dependent on the flow rate/store temperature
hot water can be delivered at the tap at
temperatures as high as 75°C. A warning
notice to this effect is provided in the front
of the appliance.
However, once the initial store temperature has
been reduced the Switch element thermostat
will reduce the temperature at the tap to no
more than 65°C. Full details of how to operate
the system are provided on a label fixed to the
front of the appliance.
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Содержание SysteMate 125
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Страница 31: ...Supplied By www heating spares co Tel 0161 620 6677 Page 31 SYSTEMATE 2000 3 0 SERVICING ...
Страница 40: ...Supplied By www heating spares co Tel 0161 620 6677 Page 40 ...
Страница 41: ...Supplied By www heating spares co Tel 0161 620 6677 ...
Страница 42: ...Supplied By www heating spares co Tel 0161 620 6677 ...
Страница 43: ...Supplied By www heating spares co Tel 0161 620 6677 ...
Страница 44: ...Supplied By www heating spares co Tel 0161 620 6677 ...
