Deaeration Function - UTICA BOILERS UCS-240 Installation, Operation & Maintenance Manual

9.6 Deaeration Function

Control performs the Deaeration function at initial
Note
start and after a reset of a locking error and after
power up.
Before starting boiler deaeration function must be performed.
Rotate black cap on deaerator, located inside the boiler, counter
clockwise  to ensure areator is open. See Figure 9-3.
• When power is supplied to the boiler Deaeration function
starts.
• Display shows 17 (Deaeration) and water pressure
(Psi). See Figure 9-4.
• Boiler pump will run on and off for up to 10 minutes.
This will purge air from the system.
• The burner will switch on for a few seconds to verify
increasing temperature on flow/return sensors.
• Boiler is ready to start in standard operation.
Repeat Deaeration function at least 3 times switching boiler on
off using button.
Manually operated purge valve can also be performed by using
purging valve on top of the heat exchanger.
9 - START UP PROCEDURE
FIGURE 9-3 AERATOR
FIGURE 9-4 Deaeration Function Display Readout
Pump OFF
FIGURE 9-5 Manual Deaeration Valve - Top Of Heat
Exchanger
Closed Position
55
Purge Valve Aerator
Pump ON
Open Position
P/N 240011654, Rev. C [06/08/2017]