Pentair FLECK 2910 NXT - Mechanical; Integration Constraints

Installer Manual Fleck 2910 - NXT - Installation
Ref. MKT-IM-002 / B - 23.05.2018 37 / 114
5.3.4. 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;
• existing plumbing should be in a good shape and free from limescale. In case of doubt, it is
preferable to replace it;
• all plumbing must be completed according to local codes and installed without tension or
bending stresses;
• 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;
• do not use lead-based solder for sweat solder connections;
• the riser tube should be cut 6 to 19 mm below the top of the tank. Slightly bevel the ridge in order
to avoid deterioration of the seal whilst fitting the valve;
• the drain line must be a minimum of 25.4 mm (1") in diameter;
• do not support the weight of the system on the 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 drain elbow, the drain line connections, and other NPT/BSP threads;
• the installation of a pre filter is always recommended (100μ nominal);
• valve inlet/outlet must be connected to main piping via flexible.
5.4. Integration constraints
Location of a water treatment system is important. The following conditions are required:
• flat and firm level platform or floor;
• room to access equipment for maintenance and adding brine (salt) to tank;
• constant electrical supply to operate the controller;
• total minimum pipe run to water heater of 3 m (10 ft) to prevent backup of HW into system;
• always install check valve before water heater to protect the softener from HW return;
• local drain for discharge as close as possible;
• water line connections with shut off or bypass valves;
• must meet any local and state codes for site of installation;
• valve is designed for minor plumbing misalignments. Do not support weight of system on the
plumbing;
• be sure all soldered pipes are fully cooled before attaching plastic valve to the plumbing.