Post Start-Up Checkout Procedure - CleaverBrooks CFC-500 Operation, Service And Parts Manual

Section 4 — CFC Commissioning
setting downward and allowing the boiler outlet temperature to rise.
The Modulation Off point is the sum of the Modulating setpoint and
the Hysteresis Off value. The Modulation On point is the setpoint
minus the Hysteresis On value.
When the boiler 's outlet temperature exceeds either of these
settings, the boiler will shut down. When the operating limit is
exceeded, the boiler will automatically recycle upon the outlet
temperature dropping below the on point. When the High Limit is
exceeded, a lockout should result requiring a manual reset of the
control after the temperature has dropped below the high limit
setting.
Before testing the High Limit, temporarily set the Modulation OFF
point higher than the High Limit setting.
Restore Modulation OFF and High Limit to operational settings after
testing.
Specific settings are determined by application. Maximum High
Limit for Model CFC is 210 deg F.
The High Limit setting is considered a safety parameter. Any
changes made will require a password login and reset of the CB
Falcon.
J. POST START-UP CHECKOUT PROCEDURE
1. Ensure proper air venting to expansion tank.
2. Set high gas pressure switch to 50% higher than operating gas
pressure at low fire. Set low gas pressure switch to 50% lower
than operating gas pressure at low fire.
3. Check the draft on the outlet stack on each boiler, compare to
acceptable limits (-.25 to +.25" W.C.) and record in start up
form. Operating outside of acceptable limits could result in light
off and flame failure problems.
4. Switch to automatic operation and monitor flue gas to ensure
consistent excess air.
5. Reassemble all panels and covers that were removed and
replace any plugs that were removed to check gas pressure.
6. Verify HAPS switch operation by simulating a blocked flue
condition.
7. Verify gas pressures remain within limits shown in Table 4-3.
8. Provide instructions to owner and operators on operation, safety
and maintenance of the equipment.
9. Provide instructions to owner and operators on proper water
treatment guidelines and procedures.
4-24 Part No. 750-263