Hydronic Piping; General - ECR International Utica Boilers MAH-100 Installation, Operation & Maintenance Manual

Boiler rated at 50 psig (345 kPa) maximum
Note
allowable working pressure. Boiler provided with
30 psig (206 kPa) safety relief valve.
When installing safety relief valve it must be
Note
installed in a vertical position with spindle at
top.
System pressure above 43 psi [2.96 bar] WILL
Note
result in boiler shutting down.
FIGURE 6-1 Safety Relief Valve
System Supply System Supply
Safety Relief Safety Relief
Valve Valve
TP Gauge TP Gauge
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.
• Do not fill boiler or boiler system with softened
water.
• Use only inhibited propylene glycol solutions
certified by fluid manufacturer as acceptable for use
with closed water heating system.
• Thoroughly clean and flush any system that used
glycol before installing new Boiler.
• Provide user with Material Safety Data Sheet
(MSDS) on fluid used.

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.
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.
• Thoroughly clean and flush system before connecting to
boiler.
System Return System Return
• 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
fine sediment is difficult to remove and can deposit onto
heat exchange surfaces and accumulate in pump cavities
causing reduced efficiency and premature wear.
• Flush system to remove any solid objects such as metal
chips, fibers, or Teflon tape, etc.
• Flush system until water runs clean and piping is free of
sediment.
• Use purge valve to flush zoned systems, each zone
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
water flows out, then close vent. Repeat this procedure,
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.
30
NOTICE
240013354 REV A [07/01/2021]