JOWA REP-1L

Ultraviolet drinking water steriliser

JOWA REP-1L sterilises drinking water with one low-pressure UV lamp in a stainless steel chamber. A photocell measures UV intensity and gives an alarm and closes the outlet solenoid valve when it falls below 30 %; a lamp ammeter monitors the lamp. It is fitted after the pH filter, storage tank and hydrophore, as close to the tapping point as possible. The manual covers specification, installation, start-up, chamber cleaning, lamp and quartz jacket replacement, a troubleshooting chart, wiring and parts.

Maintenance procedures

Replacing a quartz jacket

1. Switch off the operating switch and the automatic fuse; drain the chamber. p. 14
2. Remove the wing nuts and end covers, disconnect the lamp and pull it out. p. 14
3. Remove the O-ring flange (three 6 mm socket screws), slide the quartz out on a 10–18 mm wooden or plastic rod. p. 14
4. Fit new O-rings (soap inside), wipe the quartz with alcohol and do not touch it with bare hands. p. 14
5. Slide the new quartz in on the rod, refit flanges hand-tight to bottom, pressurise and check for leaks; refit lamp and covers. p. 14

Faults and what to do

Low reading on lamp meterLamp burnt out, bad connections, ballast fault, wrong supply voltageLow reading on intensity meterLamp faulty, dirty chamber, photocell or circuit board faultyBoth meters read zeroLamp faulty or automatic fuse offSolenoid valve does not openLamp fault, intensity alarm, alarm relay faulty

Technical specifications

UV lamp	1 low-pressure lamp, 158 cm, 65 W (27 W at 253.7 nm)	p. 3
UV dose	> 35 000 µWs/cm² at 2.7 m³/h, 60 % transmission	p. 3
Capacity	2.7–5.4 m³/h depending on water quality	p. 3
Intensity alarm	below 30 %	p. 3
Power	150 W, 230 V 50/60 Hz	p. 3
Working pressure	up to 10 bar	p. 3
Chamber	SS 316, 1630 × 104 × 275 mm, 16 kg	p. 3
Lamp voltage (unlit)	about 600 V for 152 cm lamp	p. 16

Source: manufacturer's manual “EM-26 RE-UV-PURIFIERS”, 21 pages. Page numbers refer to the original. Check against the manual on board before work.