Proposal Agreement - Culligan of Mishawaka - MPAC Water Softening System

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4.0 EQUIPMENT SPECIFICATIONS 4A SOFTENER TANK(S) Each softener tank shall be 18 in, in diameter. The overall tank height (less base) shall be 65 in,, sufficient to allow for a proper freeboard space above the resin bed for adequate expansion of the resin during backwashing. 4.1,1 Tank Construction Tank(s) shall be manufactured of polyester reinforced by a continuous roving glass filament overwrap. The top opening will be 4"-8 UN threaded and the tank bottom will be supported on a molded structural base. 4.1.2 Access Openings (Optional) Each tank will be equipped with openings for mineral filling and periodic inspection. 4.2 INTERNAL DISTRIBUTION 4.2.1 The upper distribution system shall be of the single point diffuser type to dispense water laterally to avoid channeling within the resin bed. 4.2.2 The lower distribution system shall be of the single point distributor type, constructed of PVC pipe and a fine slotted strainer to provide even flow distribution through the resin bed. The distribution system shall be embedded in a two layer subfill of washed Inorganic material to support the resin bed. 4.3 MAIN OPERATING VALVE The main operating valve shall be of a top mount design constructed of thermoplastic resistant to attack by substances found in natural water supplies. Inlet and outlet connections to be 1.5" or 2 inch NPTE. The Cv (flow coefficient) of the main operating valve shall be equal to/greater than 32. A vacuum breaker and pressure regulating valve shall be integrated in the design of the main operating valve. The main operating valve will be of the motor driven, mechanically activated design with 5 positions to accomplish the regeneration steps of backwash, brine draw/rinse, fast rinse and brine refill In addition to the service position. The internal seals will be of a modular design for ease of replacement and service. The main operating valve will be fitted with a fixed orifice eductor to control brine draw/slow rinse. The main operating valve shall be designed by the same manufacturer as the water softener system and tested prior to shipment, 4.4 FLOW CONTROL The backwash flow controller shall be a pressure -compensating orifice capable of providing and maintaining proper backwash flows over the entire listed operating pressure range of the system. The backwash flow controller shall be easily serviced without special tools and design so that service to the flow controller can be performed without disassembly of the valve body or the sequencing controller and without disconnecting existing inlet and outlet piping connections. 4.5. CONTROLS A fully integrated programmable microprocessor driven electronic controller shall be provided to automatically cycle the main operating valve through the regeneration sequence, The electronic controller shall he designed and manufactured by the same manufacturer as the water treatment equipment. The controller shall be capable of initiating a regeneration by accepting an internal signal from the controller time keeping device; an external Hall -Effect flow sensor, a Culligan Aqua -Sensor, an external device such as a remote start push-button or any combination of these methods. The controller shall sequence all steps of an automatic regeneration and automatically return the softener to a service or stand-by mode. The initiating time and/or volume setpoints shall automatically reset upon completion of the regeneration sequence. Page 2 of 5