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Execute one of the following biocide treatment programs while operating the circulating pump and prior to operating the
unit fans:
Resume treatment with the biocide that was used prior to shutdown. Operate the pump only while maintaining the
o
maximum recommended biocide residual for a sufficient duration (residual and time will vary with the biocide) as
recommended by the water treatment supplier. Start the fan only after this treatment period is completed.
Check the pH of the circulating water and, if necessary, adjust it to 7.0 - 7.6 pH. Then, running the pump only, treat
o
the system with sodium hypochlorite to maintain a level of 4 to 5 mg/l (ppm) free chlorine (as Cl2) over a six-hour
period. Test kits for measuring the free residual of chlorine are commercially available. Start the fan only after this
treatment period is completed.
•
If the unit was supplied with redundant pump system refer to the initial startup instructions in section Redundant Pump
System (Optional) on Page 44.
•
Start the unit pump and check for the proper rotation indicated by the arrow on the pump cover.
•
On installations where the unit pump was not furnished by BAC, a globe valve should be installed in the pump discharge
line and the pump flow rate adjusted to the correct water flow and pressure (2.25 psig at spray header connection).
NOTICE: Spray system pressure greater than 10.0 psig may cause damage to the distribution
system.
•
Check that the float operated make-up valve is operating freely. Closely monitor the water level and adjust as necessary
during the first 24 hours of operation.
•
Inspect the nozzles and heat transfer section as described section Water Distribution System and Heat Transfer
Section on Page 26.
•
For units with the BALTIDRIVE
Page 17.
•
Open the valve in the unit bleed line and adjust the bleed by closing or opening the valve until the desired bleed rate is
reached.
•
For initial start-up, briefly energize the fan motor(s) and note the direction of rotation. The fan should rotate in the direction
indicated by the arrow on the fan cowl.
•
Run the fan in manual mode for several minutes to check for any unusual noise or vibrations.
•
For a 2-speed motor, check to ensure the starter includes a minimum 15 second time delay when switching from high
speed to low speed.
•
Check the operation of the optional vibration cutout switch.
•
Once the unit is operating, check the current and voltage of all three phases (legs) of the fan motor with a heat load on the
unit under warm ambient conditions. The current must not exceed the motor nameplate rating.
NOTICE: Check to ensure the controls for the fan motor are set to allow a maximum of six on-off
cycles per hour to prevent motor overload.
Vertex™ Evaporative Condenser Operation & Maintenance Manual – Unit Operation and Storage
Power Train, verify proper fan tip clearance. See section BALTIDRIVE
®
Power Train on
®
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