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svf
series
500/600
Freeze Protection
WARNING
!
Failure to comply with these guidelines can
result in severe personal injury, death, or
substantial property damage.
Never use automotive or standard glycol
antifreeze, even glycol made for hydronic
systems. Use only freeze-prevention
fluids recommended by WM Technologies
for applications in SVF boiler systems.
Thoroughly flush any system that has used
glycol before installing the new SVF boiler.
Do not exceed 50% antifreeze by volume.
Antifreeze is more sluggish than water,
and can interfere with heat transfer. Sludge
can develop in the boiler with antifreeze
concentrations higher than 50%, potentially
causing damage to the heat exchanger.
Always drain and flush the system thoroughly
before filling with antifreeze. Sludge, iron, oxide
Antifreeze
Senitel X500 antifreeze is approved for use in SVF
500/600 boilers See the Parts section starting on
page 129 for obtain antifreeze through a Weil-
McLain distributor Other approved antifreezes are
listed on
weil-mclain com
Read all warnings above before using any freeze
protection in the boiler system
Use the correct amount of antifreeze:
1
Determine the freezing temperature needed to
protect against the lowest likely temperature the
system water will encounter
550-100-273/0523
boiler manual
1
deposits, and other sediment in the system
inhibit flow and can cause rapid breakdown of
inhibitors.
Install a water meter or monitor water make-
up when using freeze protection fluid with
automatic fill. Antifreeze may leak before the
water begins to leak, causing concentration to
drop and reducing the freeze protection level.
Test antifreeze concentration at least annually.
If concentration is low, either add antifreeze to
the current mixture, or drain the system and
refill with the correct mixture. Running the
system with low antifreeze concentration can
result in substantial property damage.
Review the material safety data sheet (MSDS)
with the boiler owner for the fluid used. Leave
a copy with the owner for reference. The MSDS
contains information on potential hazards and
first aid procedures for exposure or ingestion.
2
Find the antifreeze percentage (concentration
by volume) needed for the freezing temperature
from the antifreeze manufacturer's data on the
antifreeze container
3
Calculate the total volume (gallons) of all system
piping and components, including the expansion
tank and boiler Boiler water content is listed in
Table 26, page 139
4
The gallons of antifreeze required equals the
total water volume multiplied by the antifreeze
percentage required
5
Verify that the water flow rate and temperature
rise with antifreeze is in line with Table 5,
page 19 requirements
operaTion
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