Watts PWR2511 - Manual (Page 3)

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II. Controls, Indicators, and
Components
(See Figure 1)
A On / Off Switch – Turns the unit on and off.
B Product Pressure Switch – Automatically turns the unit on and
off based on the product water pressure.
C Reject Control Valve - Controls the amount of reject flow.
D Reject Recycle Control Valve – Controls the amount of recycle
flow.
E Prefilter Pressure Gauges - Indicate the inlet and outlet pres-
sures of the prefilter. The difference between these two gauges
is the prefilter differential pressure.
F Pump Discharge Pressure Gauge - Indicates the membrane
feed pressure.
G Reject Flow Meter - Indicates the reject flow rate in gallons per
minute (gpm).
H Product Flow Meter - Indicates the product flow rate in gallons
per minute (gpm).
I Prefilter Housing - Contains the RO prefilter.
J Automatic Inlet Valve - Opens when pump is on and closes
when the pump is off.
K RO Feed Pump - Pressurizes the RO feed water.
L RO Membrane Vessel(s) - Contains the RO membrane(s).
M Low-pressure indicator.
III. Operation
A. Installation
1. Proper pretreatment must be determined and installed prior to
the RO system.
2. The water supply and pretreatment equipment should be suf-
ficient to provide a minimum of 20-psig at the maximum feed
flow.
3. An electrical receptacle with a ground fault interrupt (GFI) is
highly recommended.
4. Responsibility for meeting local electrical and plumbing codes
lies with the owner / operator.
5. Install indoors in an area protected from freezing. Space al-
lowances for the removal of the membranes from the pressure
vessels should be provided.
B. Plumbing Connections
Note: It is the responsibility of the end user to ensure that the
installation is done according to local codes and regulations.
1. Connect the pretreated feed water line to the inlet valve (Figure #
1 item J). A feed water shutoff valve should be located within 10
feet of the system.
2. Temporarily connect the product water outlet to a drain. The
product outlet is located on top of the product flow meter. The
product water line should never be restricted. Membrane and/or
system damage may occur if the product line is blocked.
3. Connect the reject water outlet to a drain. The reject outlet is
located on top of the reject flow meter. The reject drain line
should never be restricted. Membrane and/or system damage
may occur if the reject drain line is blocked. An air gap must be
located between the end of the drain line and the drain. The use
of a standpipe or other open drain satisfies most state and local
codes and allows for visual inspection and sampling.
4. If a bladder tank is used for product water storage then the
product pressure switch (Figure #1 item B) needs to be con-
nected. Install a tee and tube fitting in the inlet piping of the
bladder tank and connect the tank to the pressure switch using
poly tubing. A check valve should be installed between the RO
unit and this tee.