Weil-McLain WM97+100 Manual page 91

WM97+ Series 2
Startup — fill the system
Freeze protection (if used)
Follow these guidelines to prevent pos-
sibility of severe personal injury, death or
substantial property damage:
Use only the products listed by Weil-
McLain for use with this boiler. See
page 126 for information.
Thoroughly flush any system that has
before installing the new
used glycol
WM97+ boiler.
Review the material safety data sheets
are available online. The MSDS
(MSDS)
contains information on potential hazards
and first aid procedures for exposure or
ingestion.
Check antifreeze inhibitor level at
least annually
and inhibitor levels may change over time.
Add antifreeze to increase concentration if
necessary. Add inhibitor as needed to bring
to acceptable level, using inhibitor test kit
to verify.
In addition to antifreeze and inhibitor, use
and maintain minimum level of Sentinel
X100 inhibitor as directed on this page.
If using freeze protection fluid with auto-
matic fill, install a water meter to moni-
tor water make-up
fluid may leak before the water begins to
leak, causing concentration to drop, reduc-
ing the freeze protection level.
DO NOT exceed 50% antifreeze by
. Antifreeze moves more slug-
volume
gishly 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.
Clean the system before filling
drain and flush the system thoroughly
before filling with antifreeze. Sludge, iron
oxide deposits and other sediment in the
system inhibit flow and can cause rapid
breakdown of inhibitors.
Use only antifreeze recommended by Weil-
McLain.
Weil-McLain provides information for ap-
plication of the antifreeze products listed in
this document only for use in Weil-McLain
WM97+ boilers. Do not apply these prod-
ucts or instructions for other applications.
Local codes may require a backflow pre-
venter or actual disconnection from city
water supply.
Part number 550-142-204/0117
-
GAS FIRED WATER BOILER
. Glycol concentration
. Freeze protection
. Always
— Boiler Manual
(continued)
all zones are purged. Follow the same procedure to purge air from
the boiler and its internal piping.
7. Close the quick-fill water valve and purge valve and remove the
hose. Open all isolation valves. Watch that system pressure rises to
correct cold-fill pressure.
8. After the system has operated for a while, eliminate any residual air
by using the manual air vents located throughout the system.
9. If purge valves are not installed in system, open manual air vents in
system one at a time, beginning with lowest floor. Close vent when
water squirts out. Repeat with remaining vents.
10. Open automatic air vent (diaphragm-type or bladder-type expan-
sion tank systems only) one turn.
11. Starting on the lowest floor, open air vents one at a time until water
squirts out.
12. Repeat with remaining vents.
13. Refill to correct pressure.
Use X100 inhibitor supplied with boiler
1. The WM97+ boiler is shipped with Sentinel X100 inhibitor and
Sentinel X100 Quick Test Kit. See Repair Parts at the end of this
manual for re-ordering information.
2. After filling the system as directed in these instructions, use a caulk-
ing gun to inject the X100 inhibitor into the system, following the
instructions on the tube.
3. Inject all of the inhibitor supplied with the boiler. Allow time for
the water to circulate and mix. Then check the inhibitor level. Add
additional inhibitor if necessary.
Check/verify water chemistry
1. The system may have residual substances that could affect water
chemistry.
2. After the system has been filled and leak tested, verify water pH and
chloride concentrations are acceptable.
3. Verify antifreeze concentration, if used.
4. Follow the instructions on the Sentinel test kit to sample the system
water and verify inhibitor concentration.
Check inhibitor concentration annually
1. Test the pH of a sample of system water at least annually. The pH of
the water mixture must be between 7.0 and 8.5. (Or use the Sentinel
inhibitor test kit to check concentration.)
2. If pH is outside this range (or inhibitor test kit indicates low level),
the inhibitor level may not be sufficient to prevent corrosion.
3. Test antifreeze concentration.
Test antifreeze concentration at least annually. If concentra-
tion is low, add antifreeze or drain system and refill with
correct mixture.
4. Follow instructions on antifreeze container to determine the amount
of antifreeze needed.
DO NOT
tion of antifreeze.
5. Check inhibitor level after adjustments are made.
exceed 50% by volume concentra-
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