Freestyle 2 Series Manual page 76

FreeStyle
®
2
series
32 Startup
(continued)
Eliminate all system leaks. Continual fresh
make-up water will reduce boiler life. Minerals
can build up in the heat exchanger, reducing heat
transfer, overheating heat exchanger, and causing
heat exchanger failure.
Purge air from water system
1. Connect a hose to the drain valve (see drain valves, item
10, in piping diagrams beginning on page 9). Route hose
to an area where water can drain and be seen.
2. Close the boiler or system isolation valve between the drain
valve and fill connection to the system.
3. Close zone isolation valves.
4. Open quick-fill valve on cold water make-up line.
5. Open drain valve.
6. One zone at a time, open the isolation valves. Allow
water to run through the zone, pushing out the air. Run
until no noticeable air flow is present. Close the zone iso-
lation valves and proceed with the next zone. Follow this
procedure until 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 drain valve and remove
the hose. Open all isolation valves. Watch that system pres-
sure 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 through-
out 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 84, page 64.
76
-
wall mount gas fired water boiler
–
boiler manual
Freeze protection (if used)
Follow these guidelines to prevent possibility of
severe personal injury, death or substantial prop-
erty damage:
Use only the products listed by Williamson-
Thermoflo for use with this boiler. See
page 121 for information
Thoroughly flush any system that has used
glycol before installing the new
boiler.
Review the material safety data sheets
(MSDS) are available online. The MSDS contains
information on potential hazards and first aid
procedures for exposure or ingestion.
Check antifreeze inhibitor level at least an-
nually . 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 inhibi-
tor as directed on this page.
If using freeze protection fluid with automatic
fill, install a water meter to monitor water
make-up . Freeze protection fluid may leak before
the water begins to leak, causing concentration to
drop, reducing the freeze protection level.
DO NOT exceed 50% antifreeze by volume
Antifreeze moves more sluggishly than water and
can interfere with heat transfer. At antifreeze con-
centrations higher than 50%, sludge can develop
in the boiler, potentially causing damage to the
heat exchanger.
Clean the system before filling
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 Williamson-
Thermoflo.
Williamson-Thermoflo 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.
FreeStyle
®
.
. Always drain
Part number 550-142-950/0122