Watts OFTWH-RES User Manual

For Residential Applications

ES-OFTWH-RES

Job Name

Job Location

Engineer

Approval

LEAD FREE

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Model OFTWH-RES

OneFlow® Anti-Scale System

Connection Sizes: 3⁄4" (20mm)

Flow Rates: From 0.5 gpm to 6 gpm (1.9 lpm to 38 lpm)

The OneFlow scale formation on internal and external plumbing surfaces. The OneFlow that must be installed on a cold water line prior to a single water heating device (water heater or tankless water heater).

OneFlow attract hardness minerals and convert them into harmless, inactive microscopic crystal particles.

These crystals stay suspended in the water and are passed to drain. The system requires very little maintenance, no backwashing, no salt and no electricity. Typical hardness problems, especially build-up of scale in heating elements, pipes, water heaters, boilers and on fixtures are no longer a concern.

OneFlow is a scale prevention device with proven third party laboratory test data and years of successful commercial, residential and foodservice applications. OneFlow tion and is a great alternative to water softening (ion exchange) or scale sequestering devices.

Features

• Chemical-free scale prevention and protection - converts hard-

ness minerals to harmless, inactive microscopic crystals making OneFlow softeners

• Virtually maintenance free - No salt bags or other chemicals

to constantly add or maintain

• No control valve, no electricity and no wastewater

• Uses environmentally friendly “green” technology

• Improves efficiency of all water heating devices and

downstream plumbing components

• Simple sizing & installation – standard

• Perfect system for homes where equipment protection

is desired for longer equipment life and reduced energy consumption

• Inlet ball valve for easy isolation shutoff and filter changes

• OneFlow

change the cartridge once every two years

• Easily installed mounting bracket included w/filter wrench

to allow cartridge change-outs when necessary

For hot water applications where untreated feed water temperature is 110°F - 150°F (43°C - 66°C), please consult ES-OneFlow-HotWater.

Anti-Scale System provides protection from

system is a single cartridge-based system

uses template assisted crystallization (T.A.C.) to

is not a water softener. It does not add chemicals. It

is the intelligent scale solu-

an effective alternative to ion exchange water

/4" connections

cartridge-based systems are easily maintained;

Contractor

Approval

Contractor’s P.O. No.

Representative

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OFTWH-RES

Models

Model Peak Flow Rate Connection Size

OFTWH-RES 6 gpm (38 lpm)

⁄4" (20mm) FNPT

Replacement Cartridge

OFTWHRM-RES Cartridge should be replaced every 2 YEARS.

Specifications

A OneFlow® scale prevention system shall be installed on the cold water service line to condition the tap water just prior to the service line feeding the equipment it is designed to protect. The system will be sized for maximum or peak flow rate based on the specification of said equipment. A OneFlow may also be installed to protect multiple pieces of equipment from the ill-effects of hard water scale provided the aggregate peak flow rate for each piece of equipment it is protecting has been considered. The system shall be plumbed with a bypass valve to allow isolation of filter housing to allow the bypass of untreated water in the event that service or cartridge replacement be necessary. Bypass is recommended but not required. The installation area should be suitable in size for the housing to be serviced without encumbrance and the system should be

installed per the Installation, Operation & Maintenance manual

as provided with each system.

The OneFlow to backwash, flush, or regenerate once put into service. The system shall not require any chemical additives and shall not require electricity for operation.

Note: Copper lines need to be passivated for a minimum of 4 weeks before placing unit into service. Not for use on closed loop systems.

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

system must not require additional wastewater

system

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

Water Chemistry & Limitations

pH 6.5 to 8.5

Hardness (maximum) 75 grains (1300 ppm CaCO3)

Temperature 35°F to 100°F (1.6° to 40°C)

Chlorine < 3 ppm

Iron (maximum) 0.3 mg/l

Manganese (maximum) 0.05 mg/l

Copper none allowed

Oil & H2S none allowed

Polyphosphate none allowed

Silica (maximum) 10 ppm

System Speciﬁcations

Maximum Pressure: 90psi/6.2 bar Maximum Temperature: 100°F/38°C

Minimum Temperature: 35°F/2°C

Inlet/Outlet Connections:

/4" FNPT

Service Flow Rate (Peak): up to 6 gpm (38 lpm)

Gallon Rating (Continuous Flow Rate):

OFTWH-RES: up to 4 gpm, 24/7/365 for 2 years for the OFTWHRM-RES cartridge.

Capacity: OFTWHRM-RES cartridge does not have a grain removal capacity, however, other contaminants present in the water will gradually degrade the effectiveness of this cartridge. Change the OFTWHRM-RES cartridge at least once every two years.

Standards

Independent scientific testing has confirmed Template Assisted Crystallization (TAC) technology provides scale reduction of over 95+%. Testing was conducted under protocol based on

DVGW W512 test to assess control of scale formation.

Mounted to secure wall on studs or wall panel – Do not mount to unsupported sheet-rock or gypsum board.

to inlet

32" Min to 60" A.F.F.

Installation Height

Wall

61⁄2"

⁄4" Full ow ball valve w/ 3⁄4" FNPT inlet connection from building water supply

⁄2"

231⁄2"

3" Min. Removal Clearance

⁄4" Full ow ball valve inlet connection to water supply

Mounted to secure wall on studs or wall panel – Do not mount to unsupported sheet-rock or gypsum board.

Water ltration unit must be installed on the cold water supply only

3" Min. Removal Clearance

Dimensions — Weights

Model Dimensions Weight

A B C D E

in. mm in. mm in. mm in. mm in. mm lbs. kgs

OFTWH-RES 28

The overall height and the height of the inlet ﬁtting varies due to material variations and assembly tolerances. Please allow additional clearance above the ﬁlter for making connections.

A Watts Water Technologies Company

⁄2 724 41⁄2 114 85⁄8 219 10 254 3 76 15 6.8

USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com

Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca