Pura QCRO4V-50 User manual

Quick Change Reverse Osmosis Drinking Water System
Installation, Operation & Service Instructions with Part List
Model No. QCRO4V-50
www.pura.com
This system certified by WQA
according to NSF/ANSI 58 for
TDS reduction, as verified and
substantiated by test data.

Safe Practices
Throughout this manual there are paragraphs set off by special headings.
NOTE: Note is used to emphasize installation, operation or maintenance information which is important, but does not
present any hazard. Example:
NOTE: The nipple must extend no more than 1 inch above the cover plate.
Caution!: Caution is used when failure to follow directions could result in damage to equipment or property. Example:
CAUTION! Disassembly while under water pressure can result in flooding.
WARNING!: Warning is used to indicate a hazard which could cause injury or death if ignored. Example:
WARNING! Electrical shock hazard! Unplug the unit before removing the timer mechanism or cover plates!
Serial Number
The serial number is located on the rear of the R.O. manifold housing. Record this number on the warranty page located
at the end of this manual.
NOTE: Do not remove or destroy the serial number. It must be referenced on requests for warranty repair or replacement.
This publication is based on information available when approved for printing. Continuing design refinement could cause
changes that may not be included in this publication.
WARNING! If incorrectly installed, operated or maintained, this product can cause severe injury. Those who
install, operate, or maintain this product should be trained in its proper use, warned of its dangers, and should
read the entire manual before attempting to install, operate or maintain this product.
Attention PURA Customer:
This system is intended for use on potable water supplies or disinfected water containing cysts. Do not use where water
is microbiologically unsafe or with water of unknown quality. If bacterial contamination is present, a recognized method
of water disinfection is required.
Check with your public works department for applicable local plumbing and sanitation codes. Follow your local codes if
they differ from the standards used in this manual.
For installations in Massachusetts: Massachusetts Plumbing Code 248 CMR shall be adhered to. Consult your licensed
plumber for installation of this system. The use of saddle valves is not permitted in Massachusetts.
The PURA Quick Change Drinking Water System contains a replaceable reverse osmosis membrane filter which is critical
for the effective reduction of Total Dissolved Solids. The filtered water should be tested periodically to verify that the
system is performing properly.
Serial Number Label
R - MM-DD-YY-XXXXXX
Date of
manufacture
Serial
Code
Data
Plate
Label Containing
Model #

1
Table of Contents Page
Specifications and Performance Data Sheet .................................................................. 2
Suggested Installation Equipment ............................................................................ 4
Overview of the PURA Quick Change RO System’s Components ................................................. 5
Package Contents......................................................................................... 6
Preparation............................................................................................... 7
Installation
Step 1 Select Component Installation Locations ............................................................10
Step 2 Faucet Installation................................................................................11
Step 3 Install Adapter Valve on Water Supply ..............................................................14
Step 4 Connect System Drain ............................................................................14
Step 5 Install Reservoir Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Step 6 Install Filter System Assembly .......................................................................16
Step 7 Start Up .........................................................................................17
Performance and Technical Information ......................................................................18
Installing an RO to Service Other Water Using Appliances .......................................................19
Service and Maintenance ..................................................................................20
Sanitation Procedure.......................................................................................20
Parts Breakdown ..........................................................................................21
Troubleshooting ...........................................................................................23
Warranty Information.......................................................................................25
Quick Change Reverse Osmosis Drinking Water System
Installation, Operation & Service Instructions with Part List

2
Specifications and Performance Data Sheet
Model # Part # Stage 1 Stage 2 Stage 3 Stage 4 Storage Tank Faucet
QCRO4V-50 940465 Sediment Filter Activated Carbon
Filter
Reverse Osmosis
Membrane
Activated Carbon
Filter
Metal Tank -
3.2 Gallons Chrome - AirGap
Daily Production Rate*
L/day (G/day) . . . . . . . . . . . . . . . 76.8 (20.3)
Efficiency Rating**% . . . . . . . . . . 12%
Recovery Rating*** . . . . . . . . . . . 21%
Average Reduction**** %. . . . . . 85%
Typical System Flow Sequence . Sediment Filter Activated Carbon Prefilter Reverse Osmosis Membrane 
Storage Tank Activated Carbon Postfilter Dispensing Faucet
Sediment Filter (Stage 1). . . . . . . 5 Micron
Activated Carbon Prefilter
& Postfilter (Stage 2&4) . . . . . . . . Carbon Block 5 Micron
Reverse Osmosis Membrane
(Stage 3) . . . . . . . . . . . . . . . . . . . . Thin Film Composite
Production Rate1. . . . . . . . . . . . . QCRO4V-50 36.5 gpd (138 L/day)
Ratio of Product to Flush Flow2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard Applications 1:3 - 1:5
Storage Capacity
. . . . . . . . . . . . . . . . . . . . . . . . . . . . Metal – Capacity 3.2 Gallon (12 Liters)
13.7"
13.7"
Product Water Storage Tank
15.8”
2.0”
4.7”
14.3”
2.5”
13.1”
This system certified by WQA
according to NSF/ANSI 58 for
TDS reduction, as verified and
substantiated by test data.
1 Rating at 50 psi, 77°F, 750 mg/L TDS influent, without storage tank.
2 May vary with pressure.
* The daily production rate is the volume of product water produced by the system per day and is determined by testing in accordance with the procedure outlined in NSF/ANSI Standard 58.
** System’s Efficiency rating as verified by testing in accordance with NSF/ANSI standard 58. Efficiency rating means the percentage of the influent water to the system that is available to the user as reverse
osmosis treated water under operating conditions that approximate typical daily usage.
*** System’s Recovery rating as verified by testing in accordance with NSF/ANSI Standard 58. System’s Recovery rating means the percentage of the influent water to the membrane portion of the system that is
available to the user as reverse osmosis treated water when the system is operated without a storage tank or when the storage tank is bypassed.
**** Minimum TDS reduction per NSF/ANSI 58 is 187 mg/L. Influent TDS is 750 mg/L.
Dimensions

3
NOTES
1. A booster is strongly recommended to improve the reduction of
TDS. Higher pressures will help maintain the membrane’s maximum
rejection performance.
2. The reverse osmosis membrane used in these systems may be
damaged by chlorine. These systems include activated carbon filters
which protect the membranes by reducing chlorine. Influent chlorine
should not exceed 3 mg/L.
3. A softener is strongly recommended for water over 10 gpg hard.
Installing a system without a softener on water with hardness higher
than 10 gpg will reduce the life of the membrane.
4. Additional information on factors that affect RO performance can be
found in the “Performance & Technical Information” section.
Table 1
Recommended Influent Water Characteristic
Pressure 40 - 100 psi
Temperature 40 - 77 ºF
Total Dissolved Solids (TDS)10 - 2500 ppm (0 - 2500 mg/L)
pH 5 - 10
Chlorine20 - 3 ppm (0 - 3 mg/L)
Chloramine 0 - 3 ppm (0 - 3 mg/L)
Turbidity 0 - 10 NTU
Hardness30 - 10 gpg
Iron 0 - 1 ppm (0 - 1 mg/L)
Bacterial Quality Potable
Filter Cartridge Specifications
Part # Purpose
Micron
Rating Capacity Flow Rate
Working
Temperature
Range
Working
Pressure Range
Rated
Life* STAGE
Sediment Filter 41407001 Sediment Reduction 5 2000 gallons
(7570 liters)
0.5 gal/min
(1.9 liters/min)
4-38° C
(40-100° F)
207-689 kPa
(30-100 psi) 6 Months 1
Carbon Block
Filter 41407002 Chlorine Taste and Odor 5 2000 gallons (7570 liters)
0.5 gal/min
(1.9 liters/min)
4-38° C
(40-100° F)
207-689 kPa
(30-100 psi) 6 Months 2 & 4
Part # Purpose
Recovery
(Product
Water/ Inlet
Water)
TDS
Reduction* Rating** Flow Rate
Working
Temperature
Range
Working
Pressure
Range (1) Rated Life* STAGE
RO Membrane
50 GPD 41407003 TDS Reduction 21% 85%
50 gallons/day
(189 liters/day)
(No Storage
Tank Attached)
0.5 gal/
min (1.9
liters/min)
4-38° C
(40-100° F)
50-120 psi
(345-828 kPa)
36
Months 3
* The performance and life of a reverse osmosis membrane or filter element is highly dependent upon pressure, temperature and dissolved solids (TDS).
** Manufacturer’s Specification only with inlet conditions of 345 kPa (50 psig), 25° C (77° F), going to atmosphere. The actual volume of product water and rejection percentage will vary with differences from the
test conditions that membrane ratings are based upon.
(1) Pressure Regulator is recommended for feed water pressures exceeding 552 kPa (80 psig).
Performance Data Sheet
Contaminant Reduction Table: Model QCRO4V-50
This system has been tested according to WQA S-300 for reduction of the substances listed below. The concentration
of the indicated substances in water entering the system was reduced to a concentration less than or equal to the
permissible limit for water leaving the system, as specified in NSF/ANSI 58.
Substance Allowable Influent
Challenge Concentra-
tion (mg/L)
Average Actual Influent
Concentration (mg/L)
Maximum Permissible
product water concen-
tration (mg/L)
Average Actual Effluent
Concentration (mg/L)
Actual Minimum
Percent Reduction
Average Actual Per-
cent Reduction
TDS 750 ± 20% 778 187 116 84.5 85.1

4
Suggested Installation Equipment
Recommended Tools
1. Utility Knife
2. Flathead Screwdriver
3. Phillips Screwdriver
4. Center Punch
5. 7/8” Stepped Drill Bit
6. Finish Hole Saw
7. Porcelain Saw
8. 1/8” & 3/8” Drill Bits
9. Heavy Duty Drill
10. Work Light
11. 2 Adjustable Wrenches
12. Pressure Gauge
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11
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10
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2
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5
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6
7
8
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Figure 1

5
Overview of the PURA Quick Change RO System’s Components
Manifold Assembly
The manifold assembly serves as the functional hub of the PURA system by
directing the flow through each of the system’s main components.
Sediment Filter
The sediment filter screens out particulate material, such as dirt, sand, or rust,
which may clog the other filters in the system.
Activated Carbon Filter
The activated carbon prefilter reduces chlorine which may damage the RO
membrane filter. The activated carbon postfilter serves as a final polishing
step to improve the water quality. They must be regularly checked and/or
replaced to prevent premature membrane failure and poor water quality.
Reverse Osmosis Membrane
The RO membrane (4) reduces dissolved substances and other microscopic
impurities. It consists of a membrane envelope wound around a perforated
tube. Product water diffuses through the membrane to the inside of the
envelope where it flows to and is collected by the tube. Impurities are flushed
away in the drain stream.
The RO membrane featured in the PURA system offers exceptional
contaminant rejection, application versatility, and long life. The membrane
material is sensitive to an attack by chlorine. The activated carbon filter must
be maintained properly to prevent premature failure of the RO membrane.
For long term storage the RO membrane should be refrigerated to maximize
performance once used. DO NOT ALLOW TO FREEZE.
NOTE: This preservative must be flushed from membrane before use. If
ingested it may cause irritation of the gastrointestinal tract, colic, diarrhea,
or other similar symptoms. The manufacturer recommends discarding all
the product water for at least one hour of operation before drinking or
use in food preparations. WaterGroup highly recommends discarding the
product water for a full 24 hours to flush the preservative and to properly
hydrate the membrane for maximum performance.
Drain Line Flow Control
The flow control assembly or concentrate flow control (5) regulates the flow rate of the flushing (drain) stream and to
maintain pressure in the RO membrane filter.
Automatic Shutoff
The automatic shutoff (6) automatically stops the flow of water through the PURA system when the storage tank is full.
Storage Tank
The storage tank (7) collects and stores the water produced by the RO system. A compressed air diaphragm drives the
water to the polishing filter and faucet. The ball valve (11) provides a convenient way to lock water in the tank during
transport and filter changes.
Dispenser Faucet
The PURA faucet (8) allows the product water to be drawn from the system with a simple rotation of the handle. This air
gap style faucet prevents the unit from siphoning drain water back into the system. It features a built-in siphon break
for concentrate discharge as required by most plumbing codes.
NOTE: Cleanliness is essential in the Preparation procedure. Be sure to wash your hands thoroughly before handling
filters. The use of surgical gloves is strongly recommended.
Figure 2

6
Carton 2 Carton 3
2X
3X
1. RO Manifold with Flow Control
2. Sediment Filter
3. Carbon Block Filter
4. RO Membrane
5. Carbon Block Filter
6. Storage Tank
7. Tank Base (Optional)
8. Faucet and Hardware
9. Drain Saddle
10. Tank Shut-off Valve
11. Adapter Valve ASVPP5 (3/8” or 1/2”)
12. 2X Locking Clip (3/8”)
13. 2X 3/8” Elbow
14. Faucet Adapter
15. Locking Clip (1/4”)
16. 1/4” Elbow
17. 4X #10 Phillips Self Tapping Screws
18. Teflon Tape
19. 1/4” Tubing (4 ft. White;
4 ft. Orange)
20. 3/8” Tubing (4 ft. White;
4 ft. Orange;
4 ft. Blue)
21. Installation Template Sheet 11X17
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12
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13
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14
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15
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17
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20
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21
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19
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16
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18
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11
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10
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1
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2
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5
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Figure 3
Main Carton
Package Contents

7
Tubing Connectors
The PURA system features reliable and convenient push-to-connect tubing connectors. Tubing is easily connected and
disconnected from these fittings as follows.
Connect:
Cut the tubing squarely with a sharp knife. Be careful not to crush the tubing. To
avoid leaks, make sure the tubing end is smooth and free of burrs and abrasions.
Lubricate the end of the tube with water or a light coat of silicone and push
the tube end firmly into the fitting. You should feel it push past the O-ring. Avoid
bending the tubing sharply away from the fitting.
Disconnect:
Hold the collar against the fitting body and pull the tube from the fitting.
In the unlikely event that the connection leaks, remove and recut the tubing.
Check the inside of the fitting for debris or O-ring damage. Reconnect.
Push-to-connect tubing connectors grip the outside diameter of the tube. To
help assure a reliable connection, it is important to use high quality tubing with a
consistent outside diameter.
Quick-Connect Fitting
Insertion & Removal of Plastic or
Copper Tubing
1. Simply
push in
tube to
attach.
2. Tube is secured in position. 3. Push in collet from both sides to
release tubing.
Preparation
Figure 4
1. Cut tube squarely with a sharp knife.
This manual covers the technical aspects of PURA Quick Change drinking water systems. It is important to read this manual
thoroughly so that you can properly apply, install, and service these systems.
The substances reduced by this system are not necessarily in the customer’s untreated water.
Warranty
A limited warranty is extended to the original end user from WaterGroup. This warranty is printed on the back cover of the
Owner’s Guide.
Application Guidelines
The PURA system is designed for use on potable water supplies meeting the guidelines outlined in Table 1. The system
should be installed on a home’s cold water line. The flushing stream should discharge through an approved siphon break.
Installation of this system must comply with state and local laws and regulations.
Package Content
The PURA system is shipped from the factory in carton:
NOTE: The filter elements are shipped in their own sealed packaging. This will help to simplify preparation of the system
and to maximize the shelf life of the RO membrane element.
Product Information

8
Verify Flow Control Location
The RO manifold comes attached with the elbow fitting flow control. This
flow control is attached to the manifold by quick disconnect fitting which
allows it to be easily changed. Verify it is properly located in the outlet next
to the
symbol.
Storage Tank Preparation
NOTE: Changing the air pressure will alter the amount of water stored in the tank. Increasing the pressure will decrease
capacity while decreasing pressure will increase capacity.
Check Air Pressure
Using a tire gauge with 1 psi increments, check the air pressure in the empty storage tank. The air pressure should be
between 6 and 8 psi. Depending on the influent water pressure the air pressure may need to be adjusted. To modify the
air pressure use a bicycle-type hand pump to increase the air pressure or depress the stem of the air valve to decrease
the pressure.
Install Tank Shut-off Valve
WARNING! Do not use the tank ball valve to lift or carry the tank.
Flow Restrictor
1. Apply teflon (PTFE) tape to threaded
fitting at top of tank. Wrap tape
around clockwise 3 to 6 times for a
good seal.
2. Attach shut off valve. 3. Connect white 3/8” tubing to tank.
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1
2
3
Figure 6
Figure 5
3/8” White Tubing