12
When the water flow reaches a minimum flow rate of 20-gpm (76 L/m), the flow paddle magnet closes a micro-
switch monitored by the Control Unit.
The
Control Unit
uses the Tri-
s
ensor dedicated salt sensor blades to measure the level of salt in the water.
The Control Unit uses the Tri-
s
ensor temperature sensor to determine water temperature. This measurement
is required for the Patented
Au
tomatic Temperature Compensation feature to automatically adjust chlorine outpu
t
as water temperature varies.
Less chlorine is needed in cold water, so chlorine output is automatically reduced as water temperature drops
(avoiding excess chlorine production). Conversely, more chlorine is needed in warmer water, and production
is automatically adjusted higher as water temperatures increase.
Note: The use of high strength magnet devices in the close proximity of the Tri-
s
ensor can cause the flow switch
to function incorrectly.
The
Bypass Valve
allows the water flow rate to be slowed and optimized through the
Pool Pilot
Cell, while
permitting the pump to continue to circulate water to-and from the pool/spa at full flow rates. The slowed water
flow
through the
Pool Pilot
Cell results in a more efficient "Super-Chlorination” effect, resulting in improved
overall
sanitization.
The
Pool Pilot Cell
receives power from the DIG-220 and converts the salt contained in the water to
chlorine.
Required Components for a complete system:
Automatic-Flow Bypass Manifold Assembly:
The manifold is connected into the plumbing after all other equipment. Water from the pool/spa is moved though the manifold
by the
circulation pump. The manifold's four
key
co
mponents
are the: Strainer Screen, Tri-
s
ensor,
Pool Pilot Cell
, and Bypass Flow Valve (See FIG-7).
The
Strainer Screen
prevents debris in the water from entering the Tri-
s
ensor or
Pool Pilot
Cell, and
require
periodic inspection and cleaning.
The
Tri-
s
ensor
provides data (from electronic sensors) to the DIG-220 for monitoring water flow, water temperature,
and salt concentration level. The DIG-220 uses this data to determine if conditions are safe for the
Pool Pilot
C
ell
to operate; the signal read from the temperature sensor allows the automatic temperature compensation
feature
to function (See FIG-8).
INSTALLATION
Installation Steps:
Details on each step of the installation process are presented on the following pages:
1. Plumbing the Manifold Assembly (page-12 & 13)
2. Mounting the Control Unit (page-13 & 14)
3. Electrical Connections
a. Grounding and Bonding (page-14)
b. Determine Incoming Voltage Requirements (page-14 & 15)
c. Connecting DIG-220 to External Equipment (page-15 & 16)
d. ORP Connection (page-16)
e. Cell cable (page-16)
f. Tri-sensor cable (page-16)
4. Preparing the Water (page-17)
5. Programming and Setup for Site Parameters. (page-18, 22, & 23 )
FIG-8
FLOW
PADDLE
Tri-
s
ensor Assembly
TEMPERATURE
TRI-SENSOR O-RING
DIRECTION
OF
FLOW
SALT
SENSOR
Plumbing the Manifold Assembly:
The Manifold Assembly is 2" Schedule 40 PVC, and is typically plumbed into the pool return line; and, if applicable, after t
he heater
and spa return diverter valve. Installing the
manifold
in the spa return line, will cause an excessive amount of chlorine to be introduced into the spa, while the spa is in use
a
nd must be avoided.
STEP-1:
Select the location for installing the manifold:
It is recommended the manifold be installed prior to the installation of the Control Unit. The Control Un
it must
be installed close enough to the Manifold
Assembly to allow the Tri-
s
ensor and Cell cables sufficient slack to enable component service and maintenance. The
cables are
12’ long.
The assembly must be installed in a vertical orientation as illustrated in the diagram on page-13 (fig 9). This orientation prevents hazardous gas buildup in the
system, should the flow switch fail to detect insufficient flow.
WARNING! Place manifold in vertical position ONLY.
The direction of the water flow through the manifo
ld m
ust be as indicated for the system to operate properly
.
For a Pool/Spa combination, the manifo
d must
be located as the last component in the POOL RETURN LINE (to avoid over-sanitization of the spa).
Continued Next Page...
FIG-7
Tri-
s
ensor
Pool Pilot
Cell
Strainer Screen
Bypass Flow Valve
(
INSIDE
)
