Page 14
ENGLISH
Jandy
®
TruDose
TM
Chemical Controller
|
Installation & Operation Manual
Weighted
Suction
Line
Strainer
Suction
Line
3.5”
(9 cm)
3”
Figure 12. Install Suction Weight to Suction Line
3.6.5
Discharge Line to Pump Head and
Injection Point
1. Make a secure fi nger tight connection on the
discharge fi tting of the pump head as instructed in
the Install Suction Line Instruction section.
NOTE:
DO NOT use thread sealant tape on
pump tube connections or tools to tighten
connections.
WARNING
HAZARDOUS PRESSURE: Shut off water or
circulation and bleed system pressure.
NOTE:
Locate a point of injection beyond all pumps
and filters or as determined by the application.
2.
A 1/4" or 1/2" female NPT (FNPT) connection is
required for installing the injection fi tting. If there
is no FNPT fi tting available, provide one by either
tapping the pipe or installing an FNPT pipe tee
fi tting.
3.
Wrap the male NPT (MNPT) end of the injection
fi tting with 2 or 3 turns of threading tape. If
necessary, trim the injection fi tting quill as required
to inject product directly into the fl ow of water.
4.
Hand tighten the injection fi tting into the FNPT
fi tting.
5. Install connecting nut and ferrule to the pump
discharge tubing. Insert discharge tubing into
injection fi tting until it reaches the base of the
fi tting.
6. Finger tighten the connecting nut to the fi tting.
7. Turn the pump on and re-pressurize the system.
Observe the fl ow as actuated by the system and
check all connections for leaks.
8. After a suitable amount of dosing time, perform
test for desired readings. If necessary, fi ne tune the
dosing levels.
NOTE:
The injection point and fitting require periodic
maintenance to clean any deposits or buildup.
To allow quick access to the point of injection,
we recommend the installation of shut-off
valves.
Typical Point of Injection
Trim injection
fitting end
DO NOT use teflon tape
on pump or tube threads
DO NOT use pliers
Do
No
tC
ap
Injection Valve
Return Line
Check Valve
Figure 13. Install Discharge Line to Pump Head and
Injection Point
NOTE:
Using undiluted acid could lead to corrosion
or overfeeding issues. Use muriatic acid only
(not provided). Dilute the acid 4:1 following
the safety recommendations of the chemical
manufacturer, and use personal protective
equipment. For example: For a 5 gallon tank,
there would be 4 gallons of water and 1 gallon
of muriatic acid.
