Hydrotech UVSS Series Ultraviolet Water Purification System User Manual

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4. Remove the gland nut by turning counter clockwise (Figure 3A). Place a small pail under the

reactor chamber to catch any water that may leak from the system. Grasp the quartz sleeve
and fully remove from the reactor chamber. As with the lamp, make sure the sleeve is removed
from the reactor chamber being careful not to angle the sleeve as it is removed from the reac-
tor (Figure 3B) to avoid breakage.

5. Clean the sleeve as outlined in above, or replace with a new sleeve. Reinstall the quartz sleeve

in the reverse order. The UVSS reactor is designed for easy installation of the quartz sleeve by
incorporating a unique sleeve centering guide. To install the sleeve, carefully insert the sleeve
into the reactor chamber (do not drop) and push the sleeve until it firmly seats in the end of the
reactor centered in the sleeve centering guides (Figure 3C). Install a lubricated (silicone release
grease) o-ring (Part number 410866) onto the sleeve until it is positioned against the chamfered
seat (Figure 3D).

6. Reinstall the gland nut on the reactor chamber and tighten by turning clockwise. The gland nut

should be hand-tightened only, the use of a wrench is not required, nor recommended. Reinstall
the connector as outlined in step four of the “Lamp Replacement” section.

7. Slowly turn on the water and pressurize the reactor to verify that there are no leaks.
8. Reconnect to power source and follow the Control box start-up sequence to make sure the sys-

tem is operating properly.

NOTE: If the system is put on a temporary bypass or if it becomes contaminated after the disin-
fection system, it will be necessary to shock the system with household bleach for a full 20 min-
utes before resuming the use of the water.

UV Sensor Replacement / Cleaning (UVSS-M Models Only):

The UV sensor is a very delicate instrument. Extreme care is required when handling and
cleaning. The sensor window itself is constructed from quartz which is extremely fragile,
be careful you do not chip or break this quartz window. Manufacturer’s warranty does not
cover damage due to neglect or misuse.

Mineral deposits and sediment may accumulate on the sensor window decreasing the UV ener-
gy detected. Good maintenance of the pre-treatment equipment will reduce the accumulation of
residues. If the system indicates that the UV intensity is low, one cause may be a stained quartz
sleeve and/or sensor window. To clean follow steps 1-3 below.


Before removing the sensor assembly, follow the steps as outlined in the “Quartz Sleeve
Replacement And/Or Cleaning” section. The quartz sleeve should be cleaned at the same
time as the UV sensor. Disconnect the UV sensor from the controller by disconnecting the
sensor cable, turning the collar counter-clockwise (Figure 4B). To remove the sensor, grasp
the body of the sensor and rotate counter-clockwise (Figure 4C) until the sensor is free of the
threaded sensor port.


Once the sensor is free from the reactor chamber, clean the quartz window (Figure 4A) with
a commercial scale remover (CLR or Lime-A-Way) and a lint free cotton swab (Figure 4D).
Follow all manufacturer’s instructions regarding the cleaning fluid used. Do not use an abra-
sive cleaner on the sensor window. Scratching of the sensor window will void any manufac-
turer’s warranty on this item.


Ensure sensor lens is rinsed free of cleaning solution. Carefully re-assemble the sensor assembly with o-ring (Figure
4E) into the sensor boss. Screw the sensor into the boss and tighten to achieve a water-tight seal. DO NOT OVER-
TIGHTEN. Attach the sensor cable to the controller and return to service (Figure 4B).

Figure 3C

Figure 3D

Figure 3B

Figure 3A

Figure 4A

Figure 4E

Figure 4B

Figure 4C

Figure 4D