Open Vent System; Sealed System - Aztec EB 897 01 Installation Instructions Manual

22
15
PUMP
Service Valve
Expansion
Service Valve
Drain
Valve

Sealed System

Alternative
pump position
Service Valve
Safety
Valve
Service Valve
PUMP
Drain
Valve
Supplied By www.heating spares.co Tel. 0161 620 6677
Auto air vent
Open Vented air vent
F&E Tank
arrangement
Auto
Air
Vent
3 port
valve
Bypass must
dissipate heat and
be min 22mm dia
x 1.5mtr
Bypass
Feed
15
22
Auto air vent air vent
Automatic
air vent
3 port
valve
Bypass must
dissipate heat
and be min 22mm
dia x 1.5mtr
Bypass
valve
Pressure
Gauge
Expansion
Vessel
9

Open Vent System

DHW CYLINDER
CENTRAL HEATING
FLOW
RETURN
DHW CYLINDER
CENTRAL HEATING
FLOW
RETURN
FIG. 11
FIG. 12 FIG. 12