Pure Water PW90 User manual

Service Manual
PW90
(Sani-Twist™ Filter Manifold)
© Copyright 2021 Pure Water Technology
630 Allendale Rd Suite 200 · King of Prussia, PA 19406 · 855-474-7934
[e-mail]

Table of Contents
CONDITIONS FOR USE .................................................................................................................................................. 3
SYSTEM OVERVIEW ...................................................................................................................................................... 4
RECEIVING YOUR EQUIPMENT ...................................................................................................................................... 5
SAFETY PRECAUTIONS .................................................................................................................................................. 6
PRE-INSTALLATION PREPARATION ................................................................................................................................ 8
FLUSHING THE PW90 M F ILTERS ............................................................................................................................................... 9
FLUSHING THE COMPLETE SYSTEM
............................................................................................................................................. 9
FINAL
I NSPECTION ................................................................................................................................................................. 10
SERVICE AND FILTER CHANGE PROCEDURES ............................................................................................................... 13
FILTER LIGHT RESET- PW90 .................................................................................................................................................... 15
PART DIAGRAMS ........................................................................................................................................................ 16
SPECIFICATIONS .......................................................................................................................................................... 28
TROUBLESHOOTING GUIDE ......................................................................................................................................... 29
PRODUCT LIMITED WARRANTY .................................................................................................................................. 30
WARRANTY PROCEDURE ............................................................................................................................................ 33

CONDITIONS FOR USE
CAUTION
DO NOT USE WITH WATER THAT IS MICROBIOLOGICALLY UNSAFE OR OF UNKNOWN QUALITY WITHOUT
ADEQUATE DISINFECTION BEFORE OR AFTER THE SYSTEM
THIS DRINKING WATER SYSTEM IS FOR USE ON POTABLE COLD WATER SUPPLIES ONLY
Source Water Supply
Municipal/Private: Potable Water Supply
System Pressure: 25~100 PSIG (173~690kPA)
Temperature: 40°~100°F (4°~38°C)
Warning
A pressure regulator must be installed before the system water inlet if the water pressure or any possible pressure spikes
could exceed 100 PSIG (690kPA) Failure to comply will void all warranties. The manufacturer accepts no liability for
and damage caused by excessive water pressure.
Environmental Conditions
System should be installed in areas that are protected from severe environmental conditions. System is not
manufactured or approved for installation in areas that are exposed to direct sunlight,
rain/snow and/or
extreme temperature variation.
Compliance
Installation and service must be performed by qualified personnel to ensure compliance with all applicable local, state,
federal and international codes.
Note
Always check applicable plumbing codes before tapping into a water or drain line.

SYSTEM OVERVIEW
The PURE WATER TECHNOLOGY PW90 is available in two filter
configurations:
1. PW90R This PURE WATER TECHNOLOGY model filters your
water through a series of filters and an RO membrane to
remove contaminants. These are:
A. A 5 micron sediment filter (P/N 1100-0001)
B. A 1 micron pre-carbon block filter (P/N 1100-0002)
C. An 80 gallon per day RO membrane (P/N 1100-0004)
D. A Granular Activated Carbon (GAC) filter (P/N 1100-0007)
After the water has been filtered its “Freshness” and biological
integrity is maintained by periodic in-tank ozonation.
E. Deep clean and Auto circulation freshness cycle are also
available when installed with an active drain to help maintain a
clean tank and fresh water for best possible taste.
2. PW90M This PURE WATER TECHNOLOGY model filters your water through
the following filters.
A. A 5 micron sediment filter (P/N 1100-0001)
B. A 1 micron pre-carbon block filter (P/N 1100-0002)
C. A Lead and Cyst carbon filter (P/N 1100-0003)
After the water has been filtered its “Freshness” and biological
integrity is maintained by periodic in-tank ozonation.
D. Deep clean and Auto circulation freshness cycle are also
available when installed with an active drain to help maintain a
clean tank and fresh water for best possible taste.

RECEIVING YOUR EQUIPMENT
A common carrier will be delivering your PURE WATER TECHNOLOGY product. The
equipment will be palletized with 6 systems to a pallet. Upon receipt you should check the
following.
1. Are the systems still on the pallet?
2. Count the number of boxes you are signing for.
3. Is there any obvious damage to the product or the boxes?
If there are any discrepancies or obvious damage to the equipment or boxes, please
note it on the “Bill of Lading” and/or refuse shipment.
After receiving the equipment from the carrier, remove packaging and inspect for any hidden
freight damage. If freight damage has occurred, call the freight company and PURE WATER
TECHNOLOGY customer service (855-474-7934) to report the damage. Photograph all
damages to be submitted with claim. THIS MUST BE DONE WITHIN FIVE BUSINESS
DAYS OF DELIVERY. If not reported within 3 business days, PURE WATER
TECHNOLOGY and/or carrier will not be responsible for replacement or repair.

Safety Precautions
Warning:
Do not install or use this drinking water system where the
source water is
microbiologically unsafe or with water of
unknown quality without adequate
disinfection before or
after the system.
Warning:
A pressure regulator, such as a slow flow regulator, must be
installed before the systems water inlet if the water pressure
(including any possible spikes) could exceed 100 P.S.I.G.
(690kPA). Failure to comply will void all warranties. The
manufacturer accepts no liability for damage caused by
excessive water pressure.
Warning:
These systems are manufactured with 134A refrigerant.
Repairs to the refrigeration system must be performed by a
certified refrigeration technician only.
Warning:
To prevent damage fire or shock hazard, do not expose this
system to rain or other extreme elements.
Power System:
Available in operating voltages of 120 V 60 Hz, 100 V 50/60
Hz, 230V 50 Hz.

SAFETY PRECAUTIONS (continued)
Caution:
To prevent electric shock and fire hazards, do not use with other
than specified power source.
Changes or
modifications not approved by PURE WATER
TECHNOLOGY will void any product warranty.
Use
appropriate plug adapter for your AC wall outlet.
If system begins to leak, unplug, turn off water supply and call
service center immediately.
Before moving the system, disconnect power supply and wait for
water to reach ambient
temperature before draining.
Hot water is extremely hot! Do Not dispense hot water to hands
directly.
▶Hot water may cause serious injury.
If system will not be used for an extended period of time (5 days or
longer), drain the system completely. Sanitize system prior to
re-use.
Should the system not perform as specified, unplug, turn off water
supply and call the service center.
Do not place any type of water container or heavy item on top of
the system.
▶Water may leak into the electrical system causing a fire hazard.
Heavy items may fall off causing injury.

PRE-INSTALLATIONPREPARATION
All systems must be properly flushed and inspected prior to being installed. Follow
the procedures below to insure proper operation.
Filter Flushing Procedures for
PURE WATER TECHNOLOGY “Sani-Twist™” Filter Configuration
All filters and RO membranes must be flushed sufficiently prior to
installation.
Note: The ball valve located on the filter box will turn off the water to the filters and
RO membrane. Turn to closed position before removing filters. Remember to open
the valve after replacing filters to turn the water back on.
Flushing the PW90 RO
1. Install the supply water line to “Water In” bulkhead and water drain line to “RO
Drain” bulkhead in back of unit.
2. Do not plug the system into the AC socket. (No Power)
3. Remove lower front panel to access filters. To remove, grip bottom of lower
front panel and pull to disengage magnets.
4. Remove the sediment, carbon block and post carbon filters and flush on a pre-
flush station.
5. Reinstall the sediment and carbon filters in their original places.
6. Disconnect the red restrictor line from the elbow at the base of the RO membrane.
From this elbow run a water line to drain.
7. Turn on the water to the filters, plug the system in and let the water run for 2
minutes.
8. Turn off the water to the filters, wait one minute and then replace the red restrictor
line into the elbow at the base of the RO membrane.
9. Filter flushing is now complete.
10. Replace lower front panel.

Flushing the PW90 M Filters
1. Install the supply water line to “Water In” bulkhead a.
2. Do not plug the system into the AC socket. (No Power)
3. Remove lower front panel to access filters. To remove, grip bottom of lower
front panel and pull to disengage magnets.
4. Remove the sediment, carbon block and Lead and Cyst filters and flush.
5. Reinstall the sediment and carbon filters in their original places. Filter
flushing is now complete.
6. Replace lower front panel.
FLUSHING THE COMPLETE SYSTEM
During the following steps you should be checking for any leaks, loose
fittings, hot water, cold water and production rate. See next Section- Final
inspection.
1. Turn the water to the system on, plug the system in and let the reservoir fill. RO
systems will fill in one to two hours. Filtration (M) system will fill in 5 to10
minutes.
2. Press dispense buttons to verify flow from hot and cold tanks.
3. Drain cold water into container using the dispense nozzle. Press cold dispense
button until water flow ceases or refer to programming section regarding system
flush mode.
4. Located on the rear of the system is a hot tank drain. Holding a bucket under the
drain, remove drain cap and allow the system to drain until water flow stops.
Replace drain cap.
5. Repeat steps 1 through 4.
6. Allow system to fill.
7. Turn hot switch located on back of unit to “ON” position.
8. Allow unit to sit for 4 hours to reach optimal operating temperature.
PW90 System Programming: Please refer to the LCD
programming guide or Application programming guide.

FINAL INSPECTION
Verify the following:
1. There are no leaks or loose components.
2. The hot water is over 160°F.
3. The cold water is below 50°F.
4. Confirm acceptable product water flow
A. PW90 R systems- Average tank fill for RO systems is 2 hours.
B. PW90 M systems- Average tank fill for filtration systems is 10 minutes.
5. The system exterior is clean and all components are in place.
OTHER ITEMS
1. Once a system has been flushed it should remain plugged in and water dispensed
occasionally.
2. Always drain the system before moving it. It is not necessary to drain the Hot Tank
completely through the rear Hot Tank drain. Leaving water in the Hot Tank will allow
turning on the Hot Tank immediately after installation of the system.
3. Never lay the system on its side.

INSTALLATION PROCEDURES
WARNING: Maximum water pressure (including any potential pressure spikes) of the water
supply line to the system must not exceed 100 PSIG (690 KPA). Failure to comply will void the
warranty. The manufacturer accepts no liability for damage caused by excessive water
pressure.
1. Once the unit and filtration system flushing procedures are complete, determine the best
installation location. Consider user convenience, electrical access and water access. The unit
performs optimally if within 20 feet of a cold- water supply line. Connect only to a cold
water supply. Do not install Feed Water Assembly on the Hot Water Line. Do not
place unit where it will be exposed to rain, freezing temperatures or direct sunlight.
2. The rear of the unit should be installed at least 2” (5 cm) from any vertical surface to ensure
proper air circulation.
3. Always check local plumbing codes before tapping into water supply line and drain line. Tap
into the supply line with an approved connector.
4. Use only ¼” OD copper or plastic tubing to connect your water supply and drain to the cooler
water inlet and drain port. The inlet and drain ports are quick connect fittings. Units are
shipped with plugs in each fitting. Remove the plugs prior to inserting water supply and drain
lines. A water shut off valve is recommended between the inlet connection to the cooler and
the water supply connection.
5. The PW90 RO system requires a waste or drain line for the RO membrane. The drain line
should include an Air Gap and back flow restrictor. See diagram.
6. Check the available power supply to assure proper electrical service. In the U.S., the voltage
specification is 115 volt 60 hertz. Voltage outside of this specification will affect the system
performance
7. Water filtration system will begin operating, verify proper water production.
8. Turn the Heating System switch on the back of the unit to the “ON” position.
9. Perform final inspection of all installed water lines to ensure a leak free installation.
10. Instruct user on proper system operation.
To Dispense Cold Water:
Allow at least 30 minutes for adequate cooling, then press the Cold Water button.
To Dispense Hot Water:
Allow at least 30 minutes for adequate heating, then press the two Hot Water Buttons simultaneously
NOTE: Check UPC and Local Plumbing Codes to confirm that all connections are in
compliance.

INSTALLATION PROCEDURES
WARNING: Maximum water pressure (Including any possible pressure spikes) of the water
supply line to the unit must not exceed 100 P.S.I.G. (690 KPA). Failure to comply will void the
warranty. The manufacturer accepts no liability for damage caused by excessive water
pressure.
1. Determine the best installation location considering customer preference, electrical outlet, water
line access, and if applicable, drain locations. The system must have 2” clearance from the wall.
2. In most cases the water supply will be located under a sink that has a 3/8” cold water line.
Install a compression (3/8”X3/8”X1/4” tube) fitting on the cold water line above the shut off
valve. See diagram below. Do not install Feed Water Assembly on the Hot Water Line.
3. The PW90 systems require a waste or drain line for the RO membrane. The drain
line should include an Air Gap and back flow restrictor. See diagram.
NOTE: Check UPC and Local Plumbing Codes to confirm that all connections are in
compliance.
Pure Water
Unit
12

Filter Changing Procedure
1. Verify filter configuration required for servicing. Flush the appropriate filters prior to
installation using a filter pre-flush station. Protect flushed filters from extreme cold
temperatures and potential sources of contamination.
2. Dispose of replaced filters in accordance with local laws.
after removing filtration media.
F
ilter housings may be recycled
3. Periodic replacement of the air filter is required.
This should be done a minimum of every two years.
System Inspection
When changing filters or performing service, the following items should be completed.
1. Visual Inspection
2. Hose & fitting inspection
3. Electrical inspection
4. Pressure & flow test
5. Filter monitoring system reset
6. Gallon counter reset to zero. Refer to procedure below.
7. Clean the exterior of system and condenser coils on rear of system.
8. Temperature check (Cold water should be below 50°F, Hot water should be above 160°F)
9. TDS check
10. Hot tank switch On
11. Site clean up

Filter Light Reset-
1. Use a paper clip to access the hidden key on the right side of the upper front panel.
a. Hidden key is 1” inside the hole.
2. After pressing the hidden key a list of settings will come up.
a. Wave your hand in front of the hot sensor until the cursor is over “Filter life time set”
3. Wave your hand over the cold button sensor to enter this setting.
4. Wave your hand over the hot button sensor until the cursor is resting on “Reset ?”
5. Wave your hand over the cold sensor button to erase filter
a. Notice gallon counter goes to 0.
6. To go to the next filter page wave your hand over the hot sensor.
7. Repeat steps 3 through 6 for all filters that need to be reset
A full set of instructions with images can be found on the full “LCD “Programming Guide” or through the
“Application Programming Guide”.

Part Diagrams
1. Electrical Wiring Diagram
2. PCB Diagram (Main and Display)
3. Water Flow a. PW90 b.
PW90
4. Exploded View
a. Cold Tank Assembly b. Hot
Tank Assembly c. Filter Box
Assembly
d. Front Upper Assembly