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TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Email: [email protected]
PTK Series Polyethylene Pump Tank Station with Checkmate Control System
5. Note... in initial start up, the water use points may not be sufficient to fully load
the motor. As you add use points, you should recheck the amp draw on the motor
and adjust the discharge valve as needed to prevent overloading the motor.
6.
Repeat the procedure with the tower/evaporator pump.
7.
On tower systems... the back pressure is very low on most tower cells. The
discharge valve may only be open one or two notches at full load.
8. Note... never operate a centrifugal pump without water in the case. Also, never
operate a centrifugal pump without checking for proper amp draw.
9. Note...
always operate a centrifugal pump with the suction valve fully open.
Adjust the amp draw with the discharge valve starting from a closed position.
Starting from a wide open position can give a false reading and result in motor
overload.
10. Note... if during operations, the motor overload trips, the overloads will need to
be manually reset to restart operations. Once the pump is restarted, check for
excessive motor amps at the motor start block and throttle back the discharge
valve as needed.
G.
Pump Tank Cycle
1.
Two pump operation... the pump tank set is divided into two sections by a
baffle. The sections are referred to as the ‘hot side’ and the ‘cold side’. The
‘process pump’ suction is connected to the cold side and pumps water through
the distribution system. The water removes heat from the processes and returns
to the hot side of the tank. The ‘evaporator pump’ or ‘tower pump’ receives water
from the hot side of pumps the water through the chiller(s) or tower(s) and returns
the cooled water to the cold side of the tank.
2.
One pump operation... the process pump suction is connected to the tank and
pumps water through the distribution system. The water removes heat from the
processes and passes through the chiller(s) or tower(s). The cooled water then
returns to the tank.
3.
Standby pump operation... standby pumps are supplied as an option. If
installed on the system, they are supplied valved and wired such that switching
to back-up will take only a few minutes. A valve orientation guide is provided in
section 8 of this manual.
H.
Valve Orientation for Normal and Standby Pump Operation
1.
Refer to the following chart for proper position of the valves for normal and
standby operations:
I.
Temperature and Pressure Gauges
1.
Pressure gauges. The ‘to process’ pressure gauges is mounted on the
discharge side of the ‘to process’ pump and indicates pressure to the distribution
system. The ‘tower/evaporator’ pressure gauge is mounted on the discharge side
of the tower/evaporator pump and indicates pressure to the tower cell or chiller
evaporator.
