Freeze protection (if used)
Follow these guidelines to prevent pos-
sibility of severe personal injury, death or
substantial property damage:
5SEONLYTHEPRODUCTSLISTEDBY7EIL
-C,AINFORUSEWITHTHISBOILER3EE
PAGEFORINFORMATION
4HOROUGHLY mUSH ANY SYSTEM THAT
has used glycol
before installing the
new boiler.
2EVIEW THE MATERIAL SAFETY DATA
SHEETS-3$3
are available online. The
MSDS contains information on potential
hazards and first aid procedures for expo-
sure or ingestion.
Check antifreeze inhibitor level at
least annually
. Glycol concentration
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 au-
tomatic fill,
install a water meter to
MONITORWATERMAKEUP
. Freeze protec-
tion fluid may leak before the water begins
to leak, causing concentration to drop,
reducing the freeze protection level.
$/ ./4 EXCEED ANTIFREEZE BY
volume
. Antifreeze moves more slug-
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
. Always
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
application of the antifreeze products
listed in this document only for use in
boilers. Do not apply these products or
instructions for other applications. Local
codes may require a backflow preventer
or actual disconnection from city water
supply.
Part number 550-100-305/0916
58
AquaBalance
TM
W
ALL
M
OUNT
GAS
-
FIRED
WATER
BOILER
— C
OMBI
Boiler Manual
27
Startup
(continued)
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 expansion
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.
14. When the boiler is turned on it cycles the pump to eliminate any air
in system, per Figure 67, page 52.
Use of X100 inhibitor is REQUIRED
1. The boiler is shipped with Sentinel X100 inhibitor and Sentinel X100
Quick Test Kit. See Repair Parts Figure 124, page 93 for re-ordering
information.
2. After filling the system as directed in this manual, and the air purge
has been completed, release the system water pressure to 0 psi. Drain
a small amount of water out of a convenient boiler drain to insure the
system water pressure is at 0 psi. Use a (field supplied) Dishwasher
elbow / hose 3/4 to 3/8 compression adapter (See Figure 79 below)
to the white Sentinel hose, and screw it to the tube of Sentinel X100.
Insert it into your caulk gun, and fit the washing machine hose
adapter to a boiler drain connection. Open the drain, and inject
the complete tube of X100 to the system. Close the drain valve, and
remove the injection fitting.
3. Fill system water to required pressure, and start a heating zone to
circulate system water. Allow time for the water to circulate and mix.
Then check the inhibitor level with supplied test kit. 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.
Figure 79
(ARDWARElTTINGSTOADD3ENTINELTOBOILER
