System Requirements; General 10 - IDEAL Vogue System Gen 2 S15 Installation And Servicing

1.17 SYSTEM REQUIREMENTS

Central Heating
Notes
a. The method of filling, refilling, topping up or flushing sealed primary
hot water circuits from the mains via a temporary hose connection
is only allowed if acceptable to the local water authority.
b. Antifreeze fluid, corrosion and scale inhibitor fluids suitable for use
with boilers having stainless steel heat exchangers may be used in
the central heating system.
General
1. The installation must comply with all relevant national and local
regulations.
2. The installation should be designed to work with flow
temperatures of up to 86
3. All components of the system must be suitable for a working
pressure of 3 bar and temperature of 110
be taken in making all connections so that the risk of leakage is
minimised.
The following components are incorporated within the appliance:
a. Circulating pump.
b. Pressure relief valve, with a non-adjustable preset lift
pressure of 3 bar.
c. Pressure gauge, covering a range of 0 to 4 bar.
d. A 10-litre expansion vessel, with an initial charge pressure
of 0.75 bar.
4. 'Make-up' Water. Provision must be made for replacing water
loss from the system, either :
a. From a manually filled 'make-up' vessel with a readily visible
water level. The vessel should be mounted at least 150mm
above the highest point of the system and be connected
through a non-return valve to the system, fitted at least
150mm below the 'make-up' vessel on the return side of
or
the radiators.
b.
Where access to a 'make-up' vessel would be difficult, by
pre-pressurisation of the system.
The maximum cold water capacity of the system should
not exceed 159 litres, if not pressurised. This is the
maximum system volume for the boiler expansion vessel.
If the capacity of the vessel is not considered sufficient for
this, or for any other reason, an additional vessel MUST
be installed on the return to the boiler.
Guidance on vessel sizing is given in table opposite.
5. Filling
The system may be filled by the following method:
Through a temporary hose connection from a 'draw-off' tap,
supplied from a service pipe under mains pressure. Where the
mains pressure is excessive, a pressure reducing valve must be
used to facilitate filling. When installing the filling device, it must
be connected as below to fully comply with the water regulations.
This may involve the fitting of an additional WRAS approved
isolator valve to the mains supply.
i. Thoroughly flush out the whole system with cold water.
ii. Fill and vent the system until the pressure gauge registers 1.5
bar, and examine for leaks.
iii. Check the operation of the safety valve by raising the water
pressure until the valve lifts. This should occur within 0.3 bar
of the preset lift pressure.
iv. Release water from the system until the minimum system
design pressure is reached; 1.0 bar if the system is to be pre-
pressurised.
14
SECTION 1 - GENERAL
C.
o
C. Extra care should
o
Pressure relief valve setting bar
Vessel charge pressure
System pre-charge pressure bar
System volume
(litres)
25
50
75
100
125
150
175
190
200
250
300
For other system volumes
multiply by the factor across
Model
Max CH output kW
Water flow rate @ l/min
20ºC differential
Head available m.wg
for system
Hose unions
CH Return
Temporary hose
(disconnect after filling)
Ecl 6053
3.0
bar 0.5 to 0.75
None
Expansion vessel
volume (litres)
1.6
3.1
4.7
6.3
7.8
9.4
10.9
11.9
12.5
15.6
18.8
0.063
15 18 26
15 18 26
10.8 12.9 18.7
4.7 4.6 2.9
Mains
water supply
Additional
stop valve
Double check valve
assembly
(
note direction of flow
Installation and Servicing
1.0
1.8
3.7
5.5
7.4
9.2
11.0
12.9
14.0
14.7
18.4
22.1
0.074
32
32
23
2
)