EQUIPMENT INSTALLATION
CONTINUED
NOTE:
Waste connections or drain outlet shall be designed
and constructed to provide for connection to the
sanitary waste system through an air-gap of 2 pipe
diameters or 1 inch (22 mm) whichever is larger.
WARNING:
Never insert drain line directly into a drain,
sewer line, or trap (Figure 8). Always allow
an air gap between the drain line and the
wastewater to prevent the possibility of sewage
being back-siphoned into the conditioner.
Overflow Line Connection
(not used with filter system)
In the event of a malfunction, the regenerant TANK OVERFLOW
will direct “overflow” to the drain instead of spilling on the
floor. This fitting should be on the side of the cabinet or
regenerant tank. Most tank manufacturers include a post for
the tank overflow connector.
To connect the overflow line, locate hole on side of tank. Insert
overflow fitting into tank and tighten with plastic thumb nut
and gasket as shown (Figure 9). Attach length of 1/2 inch
(1.3 cm) I.D. tubing (not supplied) to fitting and run to drain. Do
not elevate overflow line higher than overflow fitting.
Do not tie into drain line of control unit. Overflow line must be
a direct, separate line from overflow fitting to drain, sewer or
tub. Allow an air gap as per drain line instructions.
Air Gap
Drain
Secure hose in place
Drain Tubing
Overflow Fitting
Figure 9 Overflow Line Connection
Regenerant Line Connection
(not used with filter system)
The regenerant line from the tank connects to the valve. Make
the connections and hand tighten. Be sure that the regenerant
line is secure and free from air leaks. Even a small leak may
cause the regenerant line to drain out, and the conditioner will
not draw regenerant from the tank. This may also introduce air
into the valve causing problems with valve operation.
Most installations utilize a tank check valve. This is not
necessary when using the 255 valve with the built-in aircheck.
Using a tank check valve with the 255 valve with aircheck will
result in premature checking of the aircheck valve, before the
tank is empty.
Regenerant Line Connection
Figure 10 Air Check for 255 valve
Regenerant Line Connection
NOTE:
Be sure to
use plumbing
connection tube
when attaching
regenerant line
connections to
the Performa
valve.
Figure 11 Regenerant Connection for Performa Valve
NOTE:
When installing a filter (253 or 263 valve) use a cap
on the regenerant line connection to prevent water
seepage from the port. See Parts and Accessories
section for part number.
An aircheck must be used in the regenerant line when
installing a Performa valve.
Figure 12 Regenerant Tank Check Valve (not provided)*
* Furnished as an option from conditioner system manufacturer.
14
•
AUTOTROL
®
740/760 Control 255 & Performa Series Valves (268, 268FA) Service Manual
