Rola-Chem Pro Series Pump - Manual (Page 4)

Rola-Chem Pro Series Pump PN 522105 2013/11/26 Page: 4 of 8
For low pressure applications, a brass injection fitting will fit a ½ NPT (American National Standard Taper Pipe
Thread) connector or a ½ NPT hole tapped into heavy gage pipe. Push the vinyl tube through the fitting until it
hits the bottom of the pipe, then pull it back about ¼ inch. This creates an outlet for chlorine away from the
injector fitting and helps the injector fitting from becoming clogged.
For installations where a ¼ NPT injection port connection is already available, a ¼ NPT adapter with a tubing
clamp is included in the literature kit.
CAUTION !:- Do not install injection fitting directly into copper lines (may cause corrosion and discoloring).
4) Place the suction tubing in the chemical container with the weight lying on its side. This will keep the end of
the suction tubing off the bottom to allow for sediment.
5) Electrical hook-up must comply with Code, including safety devises. Voltage must be per the data plate.
CAUTION !: Pump must be wired to prevent overdosing. Connect pump to turn off when circulating system is
off. Connect pump power to a flow switch on the return piping (if circulation system stops, chemical pump must
stop).
CAUTION !: Pump must be turned off when backwashing filters.
4. OPERATION:
1) Before placing the ROLA-CHEM pump in operation, lubricate the pump hose with silicone lubricant (supplied
in the literature kit). To access the pump hose remove the knob from the front of the pump housing. Rotate the
housing cover counterclockwise and lift off the cover, or on the RC252 Models remove wing nuts and lift off the
body half. NOTE: Maintain lubrication on the pump hose at all times. Intervals for applying lubrication vary with
pump size, frequency of operation and pressures.
CAUTION !: Remove power from pump when lubricating tubing. Do not remove tubing from pump housing while
system is under pressure.
2) The three-way switch has Timer, Off and On positions. When using ‘Controllers’ (and for continuous, non-stop
chemical feeding) use the “ON” position. For interrupting action, use the “TIMER” position and adjust the timer
knob for the desired output.
The timer reduces the output by interrupting the chemical feeding for the selected portion of its nine minute
timing cycle (setting of 4 provides approximately 4.5 minutes On and 4.5 minutes Off). The pump will feed at its
maximum rate relative to operating conditions whenever it is feeding. Where an extremely accurate feeding
setting is required, use a calibrated cylinder and a stopwatch to calculate the amount fed under actual operating
conditions. Be sure to use full timer cycles when making the calculations. See rate chart for nominal feed rate
settings.
5. MAINTENANCE:
Preventive maintenance is the best defense against possible leaks. Inspect tubing frequently as stated in safety
instructions and lubricate pump hose often to maintain a coating of silicone grease. Pump hose is designed for
minimum service life of 500 hours pump run time. However hose life is affected by many factors such as system
back pressure, environmental temperature, and the chemical being pumped. Replace the pump hose when
found to be deteriorating or at the start of a new season.
Remove the tubing assembly when the pump is not in use. Place the tubing in a clean poly bag when not in use.
The pump shipping bag may be saved for this purpose. A pump hose under light duty may last more than one
season- but replacing the pump hose may prevent damaging pump or an unscheduled maintenance call.