Hydrotech UVSS Series Ultraviolet Water Purification System User Manual
INSTALLATION MANUAL & OWNER’S GUIDE
Stainless Steel Ultraviolet Water Purification System
UVSS-6
UVSS-10
UVSS-15
UVSS-6M
UVSS-10M
UVSS-15M
#51975 Rev. 10/12
Safety Instructions
WARNING
To guard against injury, basic safety precautions should be observed, including the following:
1. READ AND FOLLOW ALL SAFETY INSTRUCTIONS.
2. CAUTION - Always disconnect power before servicing.
3. DANGER - To avoid possible electric shock, special care should be taken since water is present near electrical equip-
ment. Unless a situation is encountered that is explicitly addressed by the provided maintenance and troubleshooting
sections, do not attempt repairs by yourself, refer to an authorized service facility.
4. Carefully examine the disinfection system after installation. It should not be plugged in if there is water on parts not
intended to be wet such as, the ballast or lamp connector.
5. Do not operate the disinfection system if it has a damaged cord or plug, if it is malfunctioning or if it has been dropped
or damaged in any manner.
6. Always disconnect water flow and unplug the disinfection system before performing any cleaning or maintenance activities. Never yank the cord to remove from an outlet; grasp the wall plug and pull to disconnect.
7. Do not use this disinfection system for other than intended use (potable water applications). The use of attachments
not recommended or sold by the manufacturer/distributor may cause an unsafe condition.
8. Intended for indoor use only. Do not install this disinfection system where it will be exposed to the weather or to temperatures below freezing. Do not store this disinfection system where it will be exposed to the weather or to temperatures below freezing unless all water has been drained from it and the water supply has been disconnected.
9. Read and observe all the important notices and warnings on the water disinfection system.
10. If an extension cord is necessary, a cord with a proper rating should be used. A cord rated for less Amperes or Watts
than the disinfection system rating may overheat. Care should be taken to arrange the cord so that it will not be tripped
over or pulled. Circuit breaker must not exceed power cord current rating (ie - 15A for North American NEMA 5-15P).
11. SAVE THESE INSTRUCTIONS
WARNING: The UV light given off by this unit can cause serious burns to unprotected eyes and skin. Never look directly
at an illuminated UV lamp. When performing any work on the UV disinfection system always unplug the unit first. Never
operate the UV system while the UV lamp is outside of the UV chamber.
You have purchased one of the most technologically
advanced Ultraviolet Water Treatment System available
anywhere in the world. It has been designed with you, the
consumer, in mind. PURA®products are lightweight, easy
to use, and simple to maintain. PURA products will provide you with healthy, clean drinking water for years to
come.
What is Ultraviolet?
Ultraviolet (UV) light from the sun has long been known
for its ability to destroy microorganisms. However, it has
only been in recent years that equipment producing UV
light has been manufactured for residential use.
UV energy is produced by low-pressure mercury vapor
enclosed in a tubular lamp. While a UV lamp resembles a
standard fluorescent lamp, it is similar in appearance only.
Energy produced by the UV lamp has the ability to
destroy microorganisms that can live in water. There are
five major groups of microorganisms that are altered by a
specific spectrum of ultraviolet light: viruses, bacteria,
fungi, algae, and protozoa.
When these microbes are exposed to the proper amount
of UV energy, their DNA structure is scrambled, and they
are unable to reproduce. Since the cell is now sterile or
dead, it is no longer a threat.
PURA Systems
PURA recommends that all UV systems include pre-filters to process the water before it reaches the UV lamp.
This will ensure that maximum UV exposure is achieved.
PURA Ultraviolet Water Treatment Systems are designed
for indoor use only.
PURA Systems are designed to provide complete water
treatment in a compact, easy-to-use package. Please follow the directions in this Guide exactly when installing
your PURA System to ensure that it operates correctly.
Specifications
Item # Model# Flow Rate** Flow Rate** Flow Rate** Power Lamp Inlet/ UV Chamber Size Control Box Size Weight
@ 16 mJ/cm
2
@ 30 mJ/cm2@ 40 mJ/cm2Consumption Watts Outlet (D x L) (L x W x H) lbs (kg)
usgpm (L/min) usgpm (L/min) usgpm (L/min) Watts Size inches (cm) inches (cm)
8750 UVSS-6 11 (41.63) 6 (22.71) 4.5 (17) 30 25 3/4" NPT 2.5"(6.35) x 22.07"(57.6) 7.3"(18.54) x 3.15"(8) x 2.52"(6.4) 7 (3.18)
8751 UVSS-10 20 (75.7) 10 (37.85) 7.7 (29.14) 46 37 3/4" NPT 2.5"(6.35) x 35.7"(90.6) 7.3"(18.54) x 3.15"(8) x 2.52"(6.4) 11 (5)
8752 UVSS-15 29 (109.76) 15 (56.77) 11 (41.63) 48 39 1" NPT 3.5"(8.9) x 38.1"(96.7) 7.3"(18.54) x 3.15"(8) x 2.52"(6.4) 14 (6.36)
8753 UVSS-6M 11 (41.63) 6 (22.71) 4.5 (17) 30 25 3/4" NPT 2.5"(6.35) x 22.07"(57.6) 8.3"(21) x 3.15"(8) x 2.52"(6.4) 8 (3.63)
8754 UVSS-10M 20 (75.7) 10 (37.85) 7.7 (29.14) 46 37 3/4" NPT 2.5"(6.35) x 35.7"(90.6) 8.3"(21) x 3.15"(8) x 2.52"(6.4) 12 (5.45)
8755 UVSS-15M 29 (109.76) 15 (56.77) 11 (41.63) 48 39 1" NPT 3.5"(8.9) x 38.1"(96.7) 8.3"(21) x 3.15"(8) x 2.52"(6.4) 15 (6.81)
1
*Flow rates stated at 96% UVDEOL. The manufacturer reserves the right to make product improvements which may deviate from the s pecifications and
descriptions stated herein, without obligation to change previously manufactured products or to note the change.
Conditions For Use
Water quality is extremely important for the optimum performance of your UV system. The following levels are recommended for installation:
If your water chemistry contains levels in excess of those mentioned above, proper pre-treatment is recommended to correct these water problems prior to the installation of your UV disinfection system. These water quality parameters can be
tested by your local dealer, or by most private analytical laboratories. Proper pre-treatment is essential for the UV dis-
infection system to operate as intended.
Installing Your UV Disinfection System
CAUTION
Electronic ballast must be connected to a grounded receptacle and the lamp connector ground wire connected to the stainless steel reactor chamber.
• The disinfection system is designed to be mounted either horizontally or vertically at the point-of-use or point-of-entry
depending on the specific flow rate of the unit.
Note: The ideal installation is vertical with the lamp connector at the top. This is to prevent water damage from occurring on the lamp pins and lamp connector.
• The ballast should be mounted either above or beside the reactor chamber. Never mount vertically with AC connector
at top of ballast to prevent moisture from running down cordage and causing a potential fire hazard. Drip loops in all
cordage connected to ballast controller is highly recommended (see Figure 1D).
• The complete water system, including any pressure or hot water tanks, must be sterilized before start up by flushing
with chlorine (household bleach) to destroy any residual contamination (see page 4).
• For safety purposes, the disinfection system should be connected to a ground fault interrupt circuit.
• The disinfection system is intended for indoor use only, do not install disinfection system where it may be exposed to
the outdoor weather.
• Install the disinfection system on cold water line only.
• If treating the entire house, install the disinfection system before any branch lines.
• A 5 micron sediment filter must precede the disinfection system. Ideally, the disinfection system should be the last
treatment the water receives before it reaches the faucet.
2
Note: The UV lamp inside the disinfection system is rated at an effective life of approximately 9000 hours. To
ensure continuous protection, replace the UV lamp annually.
Typical Installation
Figure 1 - Typical installation of disinfection system and the related components that may be used for the installation
Iron (Fe) < 0.3 ppm (0.3 mg/L)
Hardness* < 7 gpg (120 mg/L)
Turbidity < 1.0 NTU
Manganese (Mn) < 0.05 ppm (0.05 mg/L)
Tannins < 0.1 ppm (0,1 mg/L)
UV Transmittance > 75%**
*Where total hardness is less than 7 gpg, the UV unit should operate ef ficiently provided the quartz
sleeve is cleaned periodically. If total hardness exceeds 7 gpg, the water should be softened.
**Call customer service for recommendations on applications where UVT < 75%.
5 micron
Sediment
Filtration
Bypass
Assembly
Hot water distribution
Cold water distribution
3
1. The use of a bypass assembly is recommended in case the system requires
‘off-line’ maintenance. If this is the case, it must be noted that the system will
require supplementary disinfection of the distribution system if any water is
used during this bypass condition. In addition, during bypass, the water will
NOT be disinfected until such time as the system is sanitized and returned to
service. Please refer to the complete disinfection procedure as outlined on
page 4 of this document. If the water is to be offline, the water must be boiled
for twenty minutes prior to consumption.
2. Select a suitable location for the disinfection system and its related components. As it is recommended to install a ground fault protected circuit (GFCI),
make sure that this is taken into consideration prior to any installation. The
system can either be installed vertically (inlet port at the bottom) (Figure 1A),
or horizontally (Figure 1B), however the vertical installation is the most preferred method. When selecting a mounting location, you must also leave
enough space to allow for the removal of the UV lamp and/or quartz sleeve
(typically leave a space equal to the size of the reactor chamber itself).
Pre-Installation Instructions
The figure below shows the proper water flow for horizontal or vertical installation. Make certain that your unit and the inlet and outlet pipes
are in the right position for either horizontal or vertical installation
3. Mount the system to the wall using the supplied clamps. Various connection methods can be used to connect the water
source to the system, however union type connectors are recommended. The use of a flow restrictor device is strongly recommended when installing your system in order to maintain the manufacturers rated flow rate. The flow restrictor should be installed on the outlet port and is designed to be installed in one direction only. Ensure that the flow of
the water matches the flow direction as indicated on the flow restrictor (Figure 1C). DO NOT SOLDER CONNECTIONS
WHILE ATTACHED TO THE SYSTEM AS THIS COULD DAMAGE THE O-RING SEALS.
4. Mount the controller horizontally on the wall, near the reactor chamber. Ideally place the controller above the reactor
and away from any water connection point, to prevent any water from potentially leaking onto the controller by means
of a leak at a connection point or a ‘sweating’ system. Make sure you allow for a ‘drip-loop’ (Figure 1D) on the lamp,
sensor and power cord (prevents water from potentially entering the controller). Affix the green ground wire to the
grounding lug at the top of the reactor vessel and securely fasten with the lugnut provided (Figure 1E).
5 Install the UV lamp and sensor as outlined on pages 5-6.
6. When all plumbing connections are made, slowly turn on the water supply and check for leaks. The most likely cause
for leaks is from the o-ring seal. In case of a leak, shut water off, drain cell, remove the retaining nut, wipe the o-ring
and threads clean and re-install.
7. Once it is determined that there are no leaks, plug the system into the ground fault interrupter circuit, and check controller to ensure the system is operating properly. The controller is designed to detect both power to the system and
lamp illumination. It is important to NEVER LOOK DIRECTLY AT THE GLOWING UV LAMP.
8. Allow the water to run for a few minutes to clear any air or dust that may be in the reactor.
PLEASE NOTE: When there is no flow, the water in the cell will become warm, as the UV lamp is always on. To remedy
this, run a cold water tap anywhere in the house for a minute to flush out the warm water.
Figure 1A
Figure 1B
Min. Clearance Equal
to Unit Overall Length
Unit Overall Length
Min. Clearance Equal
to Unit Overall Length
Unit Overall Length
IMPORTANT: For vertical installation, the inlet is at
the bottom and the outlet is near the top of the disinfection chamber. For horizontal installation, pay
careful attention to the diagram for flow direction.
Correct Installation
Incorrect Installation
GFCI Receptical
GFCI
Receptical
4
Figure 1C
Figure 1E
Flow
Flow
Restrictor
Flow direction must
be the same as
arrow on flow
restrictor.
Outlet Port
on Cell
Disinfection Procedure
UV disinfection is a physical disinfection process and does not add any potentially harmful chemicals to the water. As UV
does not provide a disinfection residual, it is imperative that the entire distribution system located after the UV be chemically disinfected to ensure that the water is free from any bacteriological contaminants. The disinfection process must be
performed immediately after the UV unit is installed and repeated thereafter whenever the UV is shut down for service,
without power, or inoperative for any reason. The procedure for sanitizing the plumbing system is readily accomplished as
follows:
1. Shut off the upstream water supply that feeds water into the reactor chamber and depressurize water system. Remove
the pre-filter cartridge and fill the sump with 1-2 cups of household (5.25%) bleach (chlorine) - Do NOT use hydrogen
peroxide. At all times during the process, make sure the UV unit (and lamp) is turned on and operational!
2. Repressurize water system, open each faucet and allow cold water to run until you smell chlorine, shut the faucet off
and then repeat the process for each faucet, including hot water. You must ensure that all taps, including outside faucets,
dishwashers, shower heads, washing machines, connections to refrigerators, toilets, etc., pass chlorinated water.
3. Once all the locations have passed the chlorine disinfection solution, you will need to leave the solution sit for a period of 20 - 30 minutes. Reinstall the pre-filter cartridge into the filter and then flush the chlorine solution from the system until no chlorine smell is detectable. Make sure that each fixture that was disinfected in step 2 is completely flushed
of the chlorine solution as the consumption of this water is not advised due to the extremely high concentration of chlorine. It is important to remember that in the event that a UV is briefly shut down for routine cleaning or during power
interruptions where water could have passed through the system, the aforementioned procedure must also be followed.
Note A: The addition of chlorine (bleach) to a hot water tank that has in the past been fed with untreated raw water with
high levels of other contaminants (iron, manganese, hydrogen sulphide, organics, etc.) will result in oxidation of these
contaminants and may require repeated flushing of the hot water tank. This contingency must be dealt with independently under the startup procedure for any other conditioners that may form a part of the pre-treatment for the UV unit.
Note B: The above procedure (Steps 1 to 3) will result in a massive chlorine residual far in excess of the 0.5 to 1.0
mg/L typically present in municipally chlorinated water and of a magnitude consistent with the minimum 50 mg/L chlorine solution recommended for the disinfection of distribution systems known to be contaminated. Do not consume
water until complete system has been flushed.
PLEASE NOTE: For UVSS-M models which include a 254nm UV intensity monitor, it should be noted that the introduction of the bleach solution required for disinfection WILL trigger a temporary low UV condition. This is due to the fact that
the bleach physically ‘clouds’ the raw water. Once the bleach runs through the system, the alarm condition will return to
normal. During this sanitization process, the audible alarm condition on the controller can be temporarily deferred by pressing the “RESET” switch for 5 seconds. By doing this, the audible alarm will be silenced and the solenoid relay will close
(AC power will be provided to the normally closed (NC) solenoid, allowing water to pass through the system). The system
will display [ A2 ] on the controller LED. This condition will remain for 12 hours unless the system is manually reset as outlined on page 7 of this manual.
Figure 1D
Drip Loop
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