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Figure 3- BVSO wiring diagram with Fuel Smart HydroStat 3250 control
Wiring BVSO (Figure 2 or figure 3)
Caution: Disconnect the electrical power when wiring the unit.
Wire the blocked vent switch in accordance with The National Electrical Code and applicable
local codes. Wire the safety switch (BVSO) in series with the thermostat and the boiler control
control (Figure 2).
System Test Procedure (BVSO)
1) With the power re-established, block the chimney or vent pipe downstream of the switch.
2) Adjust the thermostat to call for heat.
3) Once the heating system has started the blocked vent switch should shut down the burner
within 10 minutes or sooner.
4) Once the system has cooled, the blocked vent switch can manually be reset.
5) This procedure should be tested a second time.
6) After testing the blocked vent switch the chimney should be cleared of obstruction and the
heating system should be tested over a long run cycle.
If the block vent switch shuts down the system, check to ensure there is enough draft in the
chimney and venting pipes.
9.0 BURNER INSTALLATION AND SETTING
ASSEMBLY & INSTALLATION OF BURNER
ASSEMBLY
Check that the burner model is correct for boiler rating required.
Assemble as per burner manufacturer’s instructions.
Thermostat
Summary of Contents for B*C-3 sections
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Page 26: ...25 Trouble Shouting the HydroStat 3250...
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