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Refer to Section VII "Venting" to re-assemble any vent system components that are disassembled during this inspection and
for details on supporting, pitching, and terminating the vent system.
s.
Replace any wiring which has been disconnected.
t.
Inspect the hydronic system and domestic water piping. Look for leaks and repair any found. If system contains
antifreeze, or other additives, test and/or maintain them as directed by the additive manufacturer. Refer to Section
XII "Start-up and Checkout" for important information on boiler water and the use of boiler water additives.
Do not remove return pipe connection from heat exchanger to service the circulator.
u. Test the boiler flow switch. To do this:
•
Start with the boiler in standby.
•
Either close a shut-off in the boiler loop or unplug the boiler pump at connector BP1. (see Figure 11.6)
• Initiate a call for heat and confirm that the boiler shows an Active Fault indicating that the flow switch is
open.
If burner comes on with no flow through the boiler, there is a problem with the flow switch. Turn the boiler
off immediately. Failure to do so could cause severe heat exchanger damage.
v.
Follow ALL instructions in Section XII "Start-up and Checkout" to place the boiler back in service, including the
performance of a combustion test.
130
XIV. Service and Maintenance
NOTICE
CAUTION
(continued)
107774-01 - 9/17
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