Supplied By www.heating spares.co Tel. 0161 620 6677
9
Feed
Bypass
3 port
valve
PUMP
Automatic
air vent
Aztec Boiler
500 mm (min)
1000 mm (min)
Drain
Valve
CENTRAL HEATING
DHW CYLINDER
Open Vented
F&E Tank
arrangement
Expansion
22
15
15
22
air vent
Sealed System
3 port
valve
Aztec Boiler
Drain
Valve
CENTRAL HEATING
DHW CYLINDER
air vent
Safety
Valve
Pressure
Gauge
Expansion
Vessel
Bypass
valve
Alternative
pump position
Auto
Air
Vent
PUMP
Service Valve
Service Valve
Service Valve
Bypass must
dissipate heat and
be min 22mm dia
x 1.5mtr
Bypass must
dissipate heat
and be min 22mm
dia x 1.5mtr
Auto air vent
Open Vent System
Auto air vent
Service Valve
FLOW
RETURN
FLOW
RETURN
FIG. 11
FIG. 12
FIG. 12
