Watts PWR4021 - Manual (Page 2)

Specifications
Watts Pure Water Series PWR4021 reverse osmosis system
shall be installed to provide reverse osmosis quality water. The
RO system shall be installed after a Series PWS water softener
so that scale forming calcium and magnesium hardness cannot
scale the RO membranes. Series PWC backwashing carbon fil-
ter shall be installed on the RO feed water line to remove chlo-
rine and prevent membrane degradation due to chlorine attack.
Series PWM backwashing sediment filter shall also be installed
on the RO feed water line to reduce the silt density index of the
water to prevent particulate fouling of the RO membranes.
The RO system shall be a high-pressure/high-rejection type
unit complete with permeate and reject water flow meters,
reject recycle water flow meter, 316L stainless steel membrane
housings, pre-filter inlet and outlet pressure gauges, membrane
feed and reject water pressure gauges, automatic inlet sole-
noid valve, low feed water pressure switch, reject and recycle
valves, digital controller with conductivity meter and high-
conductivity alarm output, storage tank level and pretreatment
interlock inputs, 5 horse power multistage centrifugal high-
pressure pump, and all other components necessary for proper
operation. The system shall be a floor mount design. The RO
permeate water shall be collected in an atmospheric storage
tank with the tank level controlled by an electronic level float.
The RO shall be equipped with inputs for the tank level float as
well as pretreatment interlock to shut the RO system down in
the event the pretreatment begins a backwash cycle. Electrical
requirements are 230 volt 60 hertz three phase. A local drain is
required to accept drain water from the system. The feed water
pressure must not fall below 20psi. The feed water temperature
must not fall below 35°F or exceed 100°F (2° - 38°C).
The system shall produce reverse osmosis quality water with
95 percent minimum average ionic rejection of total dissolved
solids when operated within the manufacturer’s operational
specifications.
Feed Water Guidelines
pH . . . . . . . . . . . . . . . . . . . . . . . . . 6 to 9
Hardness (maximum) . . . . . . . . . . . Less than 1 grain per gallon as
CaCO3 (Softened) or anti scale
chemical injection if not softened
(contact your Watts representative)
Feed Water Pressure (minimum) . . . 20psi
Temperature . . . . . . . . . . . . . . . . . . 35 - 100°F (2 - 38°C)
Free Chlorine (maximum) . . . . . . . . None Allowed
Iron (maximum) . . . . . . . . . . . . . . . Less than .1mg/L
Oil and H2S . . . . . . . . . . . . . . . . . . None Allowed
Turbidity . . . . . . . . . . . . . . . . . . . . . Less than 1.0 NTU
Silt Density Index . . . . . . . . . . . . . . Less than 5.0 SDI
Dimensions - Weights
A C
B
FRONT SIDE
MODEl NO. DIMENSIONS WEIghTS
A B C
in. mm in. mm in. mm lbs. kg
PWR40213023 18 457 56 5 ⁄
16
1430 50 1270 400 182
PWR40213033 18 457 56 5 ⁄
16
1430 50 1270 500 227
PWR40213043 18 457 56 5 ⁄
16
1430 50 1270 600 273
PWR40213053 18 457 56 5 ⁄
16
1430 50 1270 700 318
PWR40213063 18 457 56 5 ⁄
16
1430 50 1270 800 364