Technical information

21
GV
PV
0
4
3
2
1
5
6
100
200
800
700
600
500
400
300
900
1000
1100
1200
l/h
m
CE
Minimum flow (thermostatic valves closed)
O
perating Pressure
A
BC D E F
Other
Users
Pressure
Reducing Valve
Cold Water Inlet
13
Drain Tap
(at lowest point)
12
11
10
9
8
8
4
5
6
7
V
31
2
16
Fig. 10.5
A - Gas Inlet
B - C.H. Return
C - C.H. Flow
D - D.H.W. Secondary Return
E - D.H.W. Flow
F - C.W. Inlet
1 - Gas Meter Inlet Cock
2 - Gas Meter
3 - Gas Meter Outlet Cock
4 - Internal Gas Cock
5 - Appliance Gas Inlet Cock
6 - Cold Water Inlet Cock
7 - D.H.W. Expansion Vessel
8 - Cock
9 - Secondary Return Pump
10 -
Thermostat
11 - Time Control Clock
12 - T&P Valve
13 -
Tundish
NOTE:BOILER CONNECTIONS SHOWN FROM THE REAR OF THE APPLIANCE
Residual Head of the Boiler ∆T = 20
o
C
Fig. 10.6
m
/H
2
O