TriangleTube Prestige Excellence Part 1 - Manual (Page 42)

Use of Antifreeze in the Boiler System
NEVER use automotive or ethylene gly-
col antifreeze or undiluted antifreeze in
the primary system as freeze protection.
This can cause severe personal injury,
death or substantial property damage if
ignored.
Determine the antifreeze fluid quantity using
the system water content volume and following
the antifreeze manufacturer instructions.
The water volume of the PRESTIGE Excellence
is approximately 5 gallons (includes Boiler and
DHW outer tank). Remember to include the vol-
ume of the expansion tank.
Check with local codes requirements for the
installation of backflow preventers or actual
disconnect from the boiler’s cold water fill or
make up water supply line.
Massachusetts Code requires a pressure
reducer/backflow preventer if antifreeze
is used.
Ensure the concentration of antifreeze to water
does not exceed a 50/50 ratio.
System water, including additives, must
be practically non-toxic, having a toxicity
rating or Class of 1, as listed in Clinical
Toxicology of Commercial Products.
Ensure the domestic inner tank of the
PRESTIGE Excellence water heater is
properly filled and pressurized prior to
filling the boiler system. Reference the
PRESTIGE Excellence water heater for
proper guidelines on filling the inner
tank. Failure to comply could result in
damage of the inner tank.
Filling the Boiler System
1. Close the boiler drain valve located on the
bottom of the unit and any manual or auto-
matic air vent in the system.
2. Open all system isolation valves.
3. Fill the boiler system to correct system
pressure. Correct pressure will vary with
each application.
Typical residential system fill pressure is
12 psi. System pressure will increase
when system temperature increases.
Operating pressure of the system should
never exceed 25 psi.
4. Purge air and sediment in each zone of the
boiler system through the purge valve.
Open air vents to allow air to be purged in
the zones.
5. Once the system is completely filled and
purged of all air and sediment, check the
system pressure and check/repair any
leaks.
Unrepaired system leaks will cause con-
tinual makeup water to be added to the
boiler. Continual makeup water could
cause mineral buildup within the heat
exchanger, reducing the heat transfer,
causing possible heat buildup and even-
tual heat exchanger failure.
WARNING
WARNING
NOTICE
NOTICE
NOTICE
CAUTION
Star-Up Preparation
35