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3.6 Connecting a CH system (optional)
When connecting a hydronic heating loop, refer to
the TRX manual (Part 4) for specific instructions,
while bearing in mind that some aspects will differ
for the GF150, specifically:
C. Expansion Tank
A small tank is provided inside the TRX supplied
●
with the GF150. However, for larger hydronic in-
stallations, a supplementary tank will likely be
required.
D. Piping the Boiler
Given that the TRX is pre-installed onto the GF150
●
chassis, the diagram shown in this sub-section (D.)
may be disregarded, insofar as pipes are concerned.
G. CH and DHW Pressure Relief Valves (PRVs)
While the general information regarding PRVs
●
remains accurate, the maximum pressure rating for
the GF150 is 125 PSI. Do NOT install a 150 PSI PRV.
GF150 with Multiple Central Heating Circulators:
J. Applications
While the general information on hydronic appli-
cations remains accurate, the diagrams no longer
reflect the plumbing layout within the GF150.
The following plumbing diagrams are examples
●
of typical GF150 installations with hydronic
loops.
Bypass
Supply for Space
Heating Fan Coil
CH
Supply
CH
Return
21
Expansion
Vessel
Pump
Diverter
Valve
Filling Valve
Return from Space
Heating Fan Coil
3-way Valve
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