11
Common Unvented System Kit.
Cold
Feed
More than one calorifier can be
installed off a single common
cold feed. Each calorifier must
have it’s own T & P valve and
expansion relief valve. No
means of isolating these safety
valves from the calorifier should
be installed.
Drain Cock
By the
Installer
Strainer
Pressure
Reducing
Valve
Double
Check
Valve
Expansion
Vessel
Expansion
Relief Valve
and Tundish
Expansion
Relief Valve
and Tundish
Temperature
and Pressure
Relief Valve
Temperature
and Pressure
Relief Valve
Isolating
Valve
Isolating
Valve
Shared Unvented System Kits
Feeding two or more calorifiers.
Cold
Feed
Two or more calorifiers can be
installed with individual
unvented system kits. Where the
expansion vessels have been
sized to share the total system
expansion the two feed lines can
be joined by a pipe to allow both
vessels to be used when one
calorifier is isolated.
Drain Cock
By the
Installer
Strainer
Pressure
Reducing
Valve
Double
Check
Valve
Expansion
Vessel
Expansion
Relief Valve
and Tundish
Expansion
Relief Valve
and Tundish
Temperature
and Pressure
Relief Valve
Temperature
and Pressure
Relief Valve
Isolating
Valve
Isolating
Valve
Strainer
Pressure
Reducing
Valve
Double
Check
Valve
Expansion
Vessel
Cold
Feed
Drain Cock
By the
Installer
Joining pipe.
Multi-calorifier Installations
Unvented Systems
Joining pipe