Operating instructions

8
1. Do not install copper supply and return piping directly
into aluminum boiler section castings due to galvanic
corrosion between dissimilar metals.
2. Use iron, steel bushings or pipe connectors between
copper system piping and boiler to make fi nal
connection to boiler.
3. Use of dielectric unions is acceptable, installer supplied.
4. Packaged boiler is furnished with iron piping in front
boiler section for supply and return connections.
5. Install all of radiation units (panels, radiators,
baseboard, or tubing) and supply and return mains
fi rst, when installation of boiler is for new heating
system.
6. After installation of all heating system piping and
components; make fi nal connection of system piping to
boiler.
7. Hot water boiler installed above radiation level or
as required by authority having jurisdiction must be
equipped with low water cut off device (included with
boiler).
8. Periodic inspection is necessary, as is fl ushing of fl oat
type devices, per low water cut off manufacturers
specifi c instructions.
Expansion Tank And Make-Up Water
• Determine required system fi ll pressure, design
temperature, and water content.
• Boiler contains 3.0 gallons (U.S.). Size expansion tank
accordingly. Consult expansion tank manufacturer for
proper sizing information.
• Connect properly sized expansion tank (not furnished)
See Figure 2, for diaphragm type expansion tank.
For diaphragm type expansion tanks, adjust tank air
pressure to match system fi ll pressure.
• Install air vent (furnished) as shown for diaphragm type
expansion tank system only.
• Install make-up water connections as shown and per
local codes.
• If pressure reducing valve is used, adjust to match
system fi ll pressure. Verify clean water supply is
available when connecting cold make-up water supply
to boiler. When water supply is from well or pump,
install sand strainer at pump.
4 - NEAR BOILER PIPING
Figure 2 - Diaphragm Type Expansion Tank
Piping
Figure 3 - Relief Valve Discharge Piping
WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
!
Check local codes
for maximum
distance from
fl oor or other
allowable safe
point of discharge
RELIEF VALVE
DISCHARGE
PIPING