Installation Guide
Part number 550-100-066/0608
g a s -f i r e d w at e r b o i l e r — Boiler Manual
70
Startup — fill the system
Freeze protection (when used)
Follow these guidelines to prevent possibility of severe personal injury, death or substantial
property damage:
,
. Use only freeze-prevention uids recommended by Weil-McLain for application in
Ultra Boiler systems.
before installing the new Ultra
boiler.
for the uid used with the boiler owner
and leave a copy for reference. The MSDS contains information on potential hazards and first
aid procedures for exposure or ingestion.
. Glycol concentration and inhibitor levels
may change over time. Add antifreeze to increase concentration. Drain system and replace uid
mixture if inhibitor level is too low.
When using freeze protection uid with automatic fill,
. Freeze protection uid may leak before the water begins to leak, causing concentra-
tion to drop, reducing the freeze protection level.
. Antifreeze moves more sluggishly than water
and can interfere with heat transfer. At antifreeze concentrations higher than 50%, sludge can
develop in the boiler, potentially causing damage to the heat exchanger.
. Always drain and ush the system thoroughly before filling
with antifreeze. Sludge, iron oxide deposits and other sediment in the system inhibit ow and
can cause rapid breakdown of inhibitors.
Use only antifreeze recommended by Weil-McLain.
Weil-McLain provides information for application of the antifreeze products listed in this docu-
ment only for use in Weil-McLain Ultra boilers. Do not apply these products or instructions
for other applications.
Local codes may require back ow preventer or actual disconnect from city water supply.