ROLA CHEM LIQUID CHLORINATORS - INSTALLATION
General Instructions (All Models)
Before installing the unit in position on the wall or
post, the length of the PVC tubing provided should be
measured and taken into consideration.
Please ensure that no other
equipment or chemical drums (containing chlorine or acid)
are kept directly below the Rola Chem unit.
Chemical fumes can corrode machine parts.
When installed outdoors, make sure that the unit is in
a weatherproof enclosure.
To avoid loss of water from the system, close all stop
valves before cutting any lines.
2. Installing the "T" piece
(in pools without
in-floor Cleaning Systems):
Install the "T" piece into the return-to-pool
Cut an appropriate piece out of this line and glue the
"T" piece in position, using a suitable type
"P" PVC solvent cement.
IMPORTANT: ROLA CHEM
Pumps dose against a maximum pressure of 150-175kPa (20-25psi).
Avoid excessive pressure situations such as: -
1. In-Floor Cleaners:
The recommended position of the injection point and probe
is on the suction line.
Bushing: If a reducing bushing or elbow is used
(eg. 40mm in a 50mm pipe) install the injection point
far away from the reducing bushing elbow. As a precautionary
measure test the pressure with a pressure gauge just before
installing the injection point. If space is a problem,
install the injection point in the suction line.
This does not detract from the performance of the Rola
3. Connection to the PVC Tubing:
The PVC Tubing needs to be cut to the required lengths
1. Drill a 10mm hole in
the cap of the chlorine container. If using a 60 litre
the hole should be drilled in the shoulder. The container
should not be airtight
(air must enter the container) or the liquid will not
flow through the supply
2. Thread the PVC tube
through the hole in the cap or shoulder and fit the non-return
or check valve and the weight. Ensure that the non-return
valve is fitted
Correctly (arrow indicates the direction). Drop the weight,
with the non-return valve into the bottom of the container.
Measure the distance between the container and the Rola
Chem unit, preferably in a straight line, and cut the
PVC tube to length and push as far as possible onto the
barb (black connector) protruding from the left side of
the Rola Chem pump. Fix the tube onto the barb with the
black clamp to prevent any air leaks. For acid, use the
appropriate non-return valve provided., or else it will
not allow the acid to be drawn up.
3. Measure and cut the
remaining PVC tubing which goes between the machine
and the injection point. Push one end of this tubing,
as far as possible, onto the
barb (black connector) protruding from the right side
of the Rola Chem pump.
Fix the tube onto the barb with the black clamp. The other
end should be threaded through the black injection point
after it is screwed into the "T" piece. Push
the PVC tubing through the injection point so that it
protrudes approximately half way into the "T"
piece. Do not push it further. Lock the tubing in place
by hand tightening the locking nut, thus compressing the
rubber grommet of the injection point. DO NOT OVERTIGHTEN.
Tools should not be used to tighten this locking nut.
IMPORTANT: Ensure that the PVC tubing exiting from the
chlorine or acid tank is connected to the left hand side
of the squeeze (pump) tube as the chemical flow is clockwise.
TIP: Soaking the ends of the PVC tubing in hot water
makes it easier to push onto the barb. When installing
chemical containers (especially acid), in filter enclosures,
which have no ventilation, it is recommended that the
hole in the cap of the container is cut to fit tightly
around the tubing, so that the fumes from the acid or
chlorine will not corrode the equipment. It will be necessary
to drill a second hole in the cap fitted tightly with
a length of tubing which should then be vented outside
the filter enclosure. This procedure is recommended only
where the filter enclosure has no ventilation and is to
protect the pool equipment.
4. Plug the Rola Chem
unit into the power source and the filter pump power lead
into the Rola Chem plug, so that both the filter pump
and the Rola Chem operate as one. Switch on the power
Select the "Full" setting on the control dial.
The chlorinator will commence to rotate, drawing the chemical
from the container. When the chemical begins to drop down
the PVC tubing on the right side of the unit, reset the
dial to the desired level.
RECOMMENDED DIAL SETTING FOR
A DOMESTIC POOL SIZE 60000 LITRES
No. 1-2 ON A 8 HOUR FILTER CYCLE
Test the pool for the first 7 days. If the correct chlorine
level is maintained, no other adjustments are required.
However, during heavy bathing periods and excessive rain,
further adjustment may be necessary. The higher the number
on the dial, the more chlorine will be injected into the
IN WINTER, IF THE RUNNING TIME OF THE FILTER IS
NOT REDUCED, A LOWER SETTING WILL BE REQUIRED.
MODEL RC25-2 ADDITIONAL INSTRUCTIONS
This model is installed in the same way as the
RC25-1. The additional installations are as follows: -
FITTING THE PROBE OR SENSOR:
'T' piece has been drilled with 2 holes for the probe
and the injection point. The probe must be screwed into
a HORIZONTAL POSITION.
Plug the BNC connector into the probe socket on the face
of the RC25-2 with a push and twist action. After switching
on the power, the LED indicator (red light) will flash
for some seconds, the remain steady. (The LED indicator
may move around when the probe lead or the BNC connector
is touched, this is normal.
IMPORTANT: DO NOT OVERTIGHTEN
PROBE SHOULD NOT BE FITTED IN A VERTICAL OR UPSIDE DOWN
Set the control dial to the 12 o'clock position. This
setting corresponds to the desired ORP (Chlorine) level
for the average domestic pool (equals app. 1.5ppm of chlorine),
provided the pool chemistry (i.e. pH, Alkalinity, TDS,
etc.) is correct. The LED would read 3-4 bars (approximate)
from the top of the scale if the chlorine activity is
at the correct level. The LED can show 2 bars illuminated
on occasions. This is normal.
IMPORTANT: Maintain the correct pH (between 7.4-7.6,
lower for some pools). As conditions vary from pool to
pool, test the pool for the next 7 days and adjust the
control dial very slightly to achieve the required OPR/Redox
(chlorine activity level). This may mean that the control
dial is set higher or lower than the recommended position
(12 o'clock) and the LED light is correspondingly higher
HOW THE PROBE FUNCTIONS
The probe measures the ORP or Redox, which is the latest
standard for measuring the activity of sanitisers in swimming
pools or spas. His is a more accurate method (it ensures
that all the bacteria will be killed in the shortest possible
time) than free chlorine readings as measured by standard
To maintain the correct pH level is essential. If the
pH is above 7.8, the activity of chlorine can be reduced
by as much as 80%. This will give a low reading on the
LED and the RC25-2 will pump in more chlorine, even if
the chlorine level in the pool is high to compensate for
low activity resulting in excess chlorine usage. If the
pH is below 7, the opposite will occur.
Please note that the RC25-2 does not run on a continuous
basis, but on a cyclic ON/OFF timing.
The RC25-2 (and RC25-5) can save 25% or more on chemical
costs, as these only dispense chemical as and when required.
In winter and during low bathing loads, you will discover
that chlorine usage is much less, but the pool water remains
in excellent condition.
MODEL RC25-5 ADDITIONAL INSTRUCTIONS
The basic installation and maintenance is the same as
the RC25-1 and RC25-2.
Additional information for the RC25-5 is as follows:
IMPORTANT: ALWAYS INSTALL THE
PROBE IN A HORIZONTAL POSITION, NOT VERTICAL OR UPSIDE
1. Two "T" pieces
are provided with the kit. One has the injection point
for the acid and the other has the dual holes (injection
point and the opening for the probe) for chlorine. This
should be fitted in the return-to-pool line after the
filter and heater. If an in-floor cleaning system is fitted,
the injection "T" piece, as well as the probe,
should be fitted in the suction line, as there is excessive
pressure in the return line.
2. The "T" piece
with the acid injection must be upstream before the chlorine
injection and probe (the second "T" piece).
3. The chlorine side is
fully automatic (see information under RC25-2)
The pH is controlled on the acid side, with the turn
of the dial. The higher the number dialled, the more acid
is added and the pH becomes lower.
RECOMMENDED DIAL SETTING FOR
THE ACID SIDE
FOR A 60000 LITRE POOL IS NO. 1 ON A 8HOUR FILTER CYCLE
Test the pool daily for the first 7 days, adjusting
as necessary, until the correct setting is achieved.
NOTE: ACID SHOULD BE DILUTED
ADD 1 PART ACID TO 2 PARTS WATER APPROXIMATELY
NEVER MIX CHEMICALS