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6 - HYDRONIC PIPING
6.1 General
• Primary/Secondary piping required.
• Install piping in accordance with authority having
jurisdiction.
• Support system piping and safety relief valve discharge
piping. Boiler's internal piping and wall mount bracket can
be damaged if subjected to excessive weight.
NOTICE
The intended use of the internal heat exchanger pump
is a boiler loop. Do not use as a primary system pump.
• Size central heating pump (and domestic hot water pump,
if used) for system requirements only. Internal heat
exchanger pump compensates for pressure drop through
boiler internal piping and heat exchanger.
•
boiler.
• If oil is present in system water, use approved detergent
to wash system.
• It is necessary to semi-annually check the water quality of
central heating systems.
• Manufacturer recommends installation of magnetic dirt
separator in the hydronic system where there are cast
iron or steel components, or where the previous boiler
was a cast iron heat exchanger. The abrasive, extremely
heat exchange surfaces and accumulate in pump cavities
• Flush system to remove any solid objects such as metal
• Flush system until water runs clean and piping is free of
sediment.
•
separately. If purge valves and isolation valves are not
installed, install them to properly clean the system.
• When purging installations that include standing iron
radiators and systems with manual vents at high points,
start with nearest manual air vent. Open the vent until
working toward furthest air vent.
• Install a basket strainer if large amounts of sediment is
present. Keep basket clear of sediment build up.
• Manufacturer recommends a water treatment product be
used for sediment removal.
• Ensure piping in the heating system has an oxygen
barrier.
FIGURE 6-1 Safety Relief Valve
Note
Boiler rated at 50 psig (345 kPa) maximum
allowable working pressure. Boiler provided with
30 psig (206 kPa) safety relief valve.
WARNING
• Poison hazard. Ethylene glycol is toxic. Do not use
ethylene glycol.
• Never use automotive or standard glycol antifreeze,
even ethylene glycol made for hydronic systems.
• Ethylene glycol can attack gaskets and seals used in
hydronic systems.
• Do not use petroleum based cleaning or sealing
compounds boiler system.
•
water.
• Use only inhibited propylene glycol solutions
with closed water heating system.
•
glycol before installing new Boiler.
• Provide user with Material Safety Data Sheet
!
Safety Relief Safety Relief
ValveValve
Note
When installing safety relief valve it must be
installed in a vertical position with spindle at
top.
TP GaugeTP Gauge
System SupplySystem Supply
System ReturnSystem Return
Note
System pressure above 43 psi [2.96 bar] WILL
result in boiler shutting down.
240013360
REV A [07/01/2021]
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