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5.2 Hose and Accessory Connections
In order to make use of the heated fluid, it is necessary
to lay out a circuit of hoses to; distribute the hot fluid,
transfer it’s heat to another medium and return the cooled
fluid to the HD308 for re-heating (Fig. 27).
• Primary 1” hoses are used from the HD308 quick-
connect couplings (Fig. 28) to feed a manifold for
either multiple fancoils in air heating situations (Fig.
30) or multiple 5/8” hose circuits for ground thawing,
concrete curing, slab heating or snow melting (Fig. 31).
• Use only “approved hose” as supplied by ThermaStor.
Otherwise, compatibility issues may arise.
• Hoses are pre-charged with the recommended mixture
of water and propylene glycol and are equipped with
hydraulic-style quick couplers. Every hose has a male
connector on one end and a female connector on the
other end; therefore any hose can be used for either
the supply side or the return side of the hose circuit.
• Route hoses to achieve minimum chance of damage
from traffic of any kind and at the same time minimize
the overall circuit length.
• Provide protection from “Kinking” of hoses that would
restrict flow.
• When connecting Quick couplers, ensure that the
connections are “fully engaged” and snapped into
place or flow will not take place through the coupler
connection.
• For longer term, building heating projects it is advised
to insulate all hose sections located outdoors,
between the FireBird HD308 and the exterior building
wall. Special “insulating wraps” are available for this
purpose.
• Mounted Remotely on Plumbing Circuit
• Pump and Burner Pressure Gauges
5. Setup
5.1 Positioning Equipment on the Job
Before choosing the location to place the central hydronic
heater on a job site, several factors should be considered.
• If possible, the HD308 should be placed at a central
position that will minimize and equalize the lengths of
hoses. This helps to ensure maximized and equalized
HTF flow.
• Convenient access to a suitable electrical connection,
if site power is to be used. 120V, 1PH, 60Hz, 20A,
3-wire grounding is required.
• Convenient access to bulk truck re-fueling.
• Do not locate in the path of job site traffic.
• Avoid locations that will expose the HD308 to intense
dust or other sources of air contamination. Clean
flowing air is essential to maintain clean combustion.
• Observe all requirements listed in the “Instructions for
Installation” document provided with this unit.
21: Low Water Cutoff
22: Flow Switch
23: High Temp Limit
Switch
24: High Pressure
Switch
25: Pump Pressure
Gauge (PSI)
26: Fuel Oil Pressure
Gauge (PSI)
