The Condensate Water Filter (Side Stream/ Multimedia) are compact filtration packages for the removal of grit, airborne particles and scale from cooling tower water in order to avoid system fouling.
A licensed and/or trained/experienced plant electrician and millwright-pipe fitter should install this packaged system.
Ensure that the concrete pad is level and structurally sound to accommodation the weight of the system, including liquid. To firmly position this unit, appropriate size anchor bolts are necessary. To minimize pipe strain to the separator, suction and discharge pipes should be supported independently.
The pump suction line should be sized for about 5 ft/sec. regardless of the actual pump suction size. Minimize suction lengths (no more than 30’) and restrictions such as elbows. These practices will minimize friction losses and help extend pump seal life. Exceptions may apply if a qualified individual calculates NPSHA and NPSHR for the pump.
The threads of the pipe fittings screwed into the pumps must be sealed with pipe sealants, Teflon tape, R.T.V. or other sealing materials approved for pipe threads. In case of flanged connections, rubber gaskets should be used.
Tighten pump and pipe fittings only as much as required to avoid leaks and air intrusion. Air entrapment into the pump may affect its efficiency and result in cavitation. Do not over tighten.
The control panel must be wired for the proper voltage and rotation of the pump (see writing diagram in control box door). All wiring should be done by a licensed electricians in accordance with local codes. Motor nameplates indicate voltage, amperage draw, cycles, phase, speed and other motor information.
Allow water to enter the pump, jog-start the pump to verify correct rotation as indicated in the pump’s housing. Reverse terminal leads as necessary.
Installation of Pump
Install Pump as close to suction supply as possible.
Shortest and most direct suction pipe practical. Suction lift must not exceed limit for pump. NPSH available must equal or exceed pump requirement.
Suction port below pumping level to provide priming.
Room for inspection and maintenance.
Correct power supply to motor; all wiring should meet National Electrical and Local Codes and Regulations.
If outdoors, protection from the elements, freezing and water damage due to flooding.
Piping – Suction and discharge gauges are useful to check pump operation and are excellent trouble indicators. Install gauges in the lines if pump ports do not have gauge taps. Observe these precautions when installing piping:
Support close to, but independently of pump.
Use the next larger pump size for suction and discharge.
Keep as straight as possible. Avoid bends and fittings.
Remove burns, sharp edges, ream pipe cuts, and make joints air-tight.
Don’t spring pipe to make connections. Strain must not be transmitted to pump.
Allow for pipe expansion with hot fluids; expansion joints are not recommended.
Suction – Size and install suction piping to keep pressure loss at minimum and to provide correct NPSH by observing the following:
The suction pipe should be equal in size or preferably one size larger than the suction connection of the pump. If pipe is larger than the pump suction, an eccentric pipe reducer should be used at the pump.
Pipe should slope upward to pump, even for horizontal run.
Use 45-degree or long-sweep 90-degree elbows.
A valve in the suction is necessary only on positive suction head installation and must not be used to throttle the pump. The suction valve should be installed for maintenance purposes only.
Discharge – Pumps permit discharge port location at any of four positions, 90 degrees apart. Change by removing cover bolts, rotate casing, and replace bolts. Do not slice O-ring or tear fibre gasket. Scot does not recommend bottom vertical discharge due to erratic pump performance. Ensure there is adequate clearance with selected position between wall or tank, motor conduit box, and grease fittings. Casing may extend beyond base or feet.
Short discharge lines may be the same size as the discharge port. Long runs require a pipe larger than the discharge port.
Long horizontal runs require a grade as even as possible. Avoid high spots and lops. Trapped air with throttle flow and may result in erratic pumping.
Install check and gate valves in discharge line; check valve (if used) between pump and gate valve.