FireBird HEAT PAC 120/150, Installation Servicing & Operating Instructions, Page: 21 / 56

5
OIL SUPPLY
19
5-D Two Pipe Systems
Where installations have the bottom of the tank below the oil burner pump
a two pipe system is required. Ensure that valves and filters are not fitted in
the return line as this must be unobstructed at all times.
The oil burner pump should be set for two pipe operation as detailed in
accompanying oil burner manufacturers manual, refer also to page seven of
this manual - section 2E+F
5-E Tigerloop Single Pipe Systems
IMPORTANT: The Tigerloop should not be fitted inside the dwelling - See
drawing below and OFTEC manual book 3 page 2(10)
Where installations normally require a two pipe system but have long or
impractical return line runs, a ‘Tigerloop’ De-aerator can be used which
removes air from a single - pipe - lift oil feed. Higher lift heights can be
achieved than are possible with conventional two pipe systems.
The oil burner pump should be set for two pipe operation.
Individual Tigerloop instructions must be implicitly followed.