Mechanical; Outdoor Locations - Pentair Autotrol 255 Installer Manual

5.2.3. Mechanical

• Do not use petroleum-based lubricants such as vaseline, oils, or hydrocarbon-based lubricants.
Use only 100% silicone lubricants;
• all plastic connections should be hand tightened. PTFE (plumber's tape) may be used on
connections that do not use an O-ring seal. Do not use pliers or pipe wrenches;
• all plumbing must be completed according to local codes;
• soldering near the drain line should be done before connecting the drain line to the valve.
Excessive heat will cause interior damage to the valve;
• observe the drain line requirements:
maximum 1 m (3 ft 3 in) high at 2 bars (29 psi) inlet pressure. Add 50 cm (1 ft 7 in) for each
additional 1 bar (14.5 psi) inlet pressure;
• do not use lead-based solder for sweat solder connections;
• the drain line must be a minimum of 12.7 mm (½") in diameter. Use 19 mm (¾") pipe if the
backwash flow rate is greater than 26.5 lpm (5.83 gpm) or the pipe length is greater than 6 m
(19 ft 8 in);
• do not support the weight of the system on the control valve fittings, plumbing, or the bypass;
• it is not recommended to use sealants on the threads. Use PTFE (plumber's tape) on the threads
of the 25.4 mm (1") NPT elbow, the drain line connections, and other NPT/BSP threads.

5.2.4. Outdoor Locations

When the water conditioning system is installed outdoors, several points must be considered.
• Moisture — The valve and 700 controller are rated for NEMA 3 locations. Falling water should
not affect performance. The system is not designed to withstand extreme humidity or water
spray from below. Examples are: constant heavy mist, near corrosive environment, upwards
spray from sprinkler;
• direct Sunlight — The materials used will fade or discolour over time in direct sunlight. The
integrity of the materials will not degrade to cause system failures. If it is necessary to locate the
softener in direct sunlight, a protective outdoor cover (P/N 1267811) over the valve and controller
is necessary;
• temperature — Extreme hot or cold temperatures may cause damage to the valve or controller.
Freezing temperatures will freeze the water in the valve. This will cause physical damage to the
internal parts as well as the plumbing. High temperatures will affect the controller. The display
may become unreadable but the controller should continue to function. When the temperature
drops back into normal operating limits the display will return to normal. A protective cover (P/
N 1267811)should assist with high temperature applications;
• insects — The controller and valve have been designed to keep all but the smallest insects out of
the critical areas. Any holes in the top plate can be covered with a metal foil ductwork tape. The
top cover should be installed securely in place;
• wind — The Logix cover is designed to withstand a 48 km/h (30 mph) wind when properly
installed on the valve.
Ref. MKT-IM-021 / A - 20.02.2019
Installer Manual 255/LOGIX 742-762-764 - Installation
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