Sime 8116910, User, Installation And Servicing Instructions

Page: 21 / 80

21
5.8 Expansion vessel
Description U/M
Edea T
25 35
Total capacity l 9,0
Prefilling pressure
kPa 100
bar 1,0
Useful capacity l 5,0
Maximum system content (*) l 124
(*) Conditions of:
Average operating temperature 70°C (with high tempera-
ture system 80/60°C)
Start temperature at system filling 10°C.
m
CAUTION
– For systems with water content exceeding the
maximum system content (as indicated in the ta-
ble) an additional expansion vessel must be fitted.
– The difference in height between the relief valve
and the highest point of the system cannot exceed
6 metres. If the difference is greater than 6 me-
tres, increase the prefilling pressure of the expan-
sion vessel and the system when cold by 0.1 bar
for each meter increase.
5.9 Circulation pump
The flow-head performance curve available for the heating
system is shown in the graph below.
RESIDUAL HEAD (mbar)
0
0 800 1000 1200 1400 600 400 200
100
200
300
400
500
600
700
35
25
FLOW (l/h)
Fig. 14
The flow-head performance curve available for the remote hot
water tank coil is shown in the graph below.
RESIDUAL HEAD (mbar)
0
0 800 1000 1200 1400 600 400 200
100
200
300
400
500
600
700
800
FLOW (l/h)
Fig. 15
m
CAUTION
The appliance is equipped with a by-pass which en-
sures water circulation in the boiler when thermo-
static valves are used in the system. The heating sys-
tem design should incorporate a room thermostat.
Thermostatic radiator valves fitted to all radiators
except the room where the room thermostat is fit-
ted. Properties with floor areas exceeding 150squre
metres should be zoned.