The complete procedure from the GloEn-Patrol service manual, with the exact part numbers, bolt sizes, the series-circuit alarm diagnosis nobody explains, 

and how to pick the right replacement lamp and sleeve for your chamber.

by the Fiver marine technical team. ~11 min read · 2,450 words

Fiver OEM-equivalent MP UV lamp and quartz sleeve for the Panasia GloEn-Patrol BWTS.

On this page

1. Quick Answer

2. Why it matters

3. Parts, tools & PPE

4. Part 1: UV lamp

5. Part 2: Quartz sleeve

6. Which part do I need?

7. Troubleshooting

8. Maintenance schedule

9. 7 mistakes

10. Safety & mercury

11. FAQ

Quick Answer

Replacing a UV lamp in a Panasia GloEn-Patrol™ BWTS takes about 15–20 minutes per lamp and follows six steps: isolate power → remove the side covers → unscrew the round bolts and isolating bracket → pull the anti-vibration module → slide the old lamp out of the quartz lamp sleeve → fit the new lamp and reassemble in reverse order.

You will need the 6 pcs M4×12L round bolts (Part No. 54), the 1 pc M4×6L bolt on the isolating bracket (Part No. 19), the anti-vibration module (Part Nos. 96, 98, 99, 100), a fresh O-ring (Part No. 102) and clean, powder-free gloves. Quartz sleeve (lamp sleeve, Part No. 12) replacement follows the same teardown plus the screw plug, and adds 30–45 minutes — usually scheduled at the same time as the lamp change.

Bottom line: always cut the main circuit breaker and the relevant lamp circuit breakers in the UV Power Supply panel before you touch anything. Panasia medium-pressure (MP) lamps run at 600 °C+ surface temperature and stay hot after shutdown.

Why this job matters more than it looks

The GloEn-Patrol is a 100% physical, chemical-free ballast water treatment system. It works in two stages:

1. Filtration — the filter removes organisms and sediment larger than 50 µm.

2. UV disinfection — the UV chamber neutralises everything smaller than 50 µm (bacteria, algae, viruses, pathogens) so it cannot reproduce after discharge.

The UV chamber is the compliance-critical half of that equation. Every lamp sits inside a quartz sleeve that keeps the lamp dry and lets UV-C through. The two components fail in different ways and on different clocks:

• Lamps lose UV-C output gradually and reach end of useful life (rated up to 4,000 operating hours on Fiver replacements).

• Quartz sleeves do not "wear out" electrically — they foul (scale, iron oxide, organic film) and lose transmittance, or they develop cracks and start leaking water toward a live lamp.

If either degrades, your logged UV intensity drops below the system setpoint, the BWMS starts refusing to discharge, and you are one port state control inspection away from a detention under IMO D-2 / USCG requirements. Replacing lamps and sleeves on schedule is the cheapest compliance insurance on board.

Before you start: parts, tools and PPE

Panasia GloEn-Patrol part numbers used in this procedure

The part numbers below are exactly the ones referenced in the GloEn-Patrol lamp replacement procedure. Keep this table with your spare parts list.

Note: Panasia builds the GloEn-Patrol across several chamber capacities and models (for example PU50, PU250 and PU500, plus explosion-proof PU###-Ex units). The procedure is the same, but bolt counts and drawing details can vary slightly by capacity. Always cross-check against the UV unit drawing attached to your own manual.

Tools and materials

• Insulated gloves, safety glasses, and clean powder-free gloves for handling lamps

• Insulated screwdriver / hex keys for M4 bolts

• Alcohol wipes (for lamp glass and quartz sleeve outer wall)

• New O-rings (Part No. 102) and a soft, lint-free cloth

• Panasia UV Lamp Test Kit (for post-replacement fault diagnosis)

• A sealed container for old lamps (mercury-containing waste)

Non-negotiable safety cautions

1. Switch OFF the main circuit breaker and the relevant lamp circuit breakers in the UV power supply panel before starting any work.

2. The lamps can be HOT. Allow a cooling period before touching or dismantling components.

3. Never touch the UV lamp glass with bare hands. Skin oils create hot spots and shorten lamp life. Wear clean gloves and hold the lamp by the ceramic ends.

4. UV-C is harmful to eyes and skin. Never look at an energised lamp without UV-rated eye protection.

5. Lamps contain mercury. Do not dispose of them as ordinary waste — follow your local environmental regulations and your port's disposal guidance.

6. Remember that UV lamps must be installed horizontally, regardless of whether the reactor itself is mounted vertically or horizontally.

Part 1 — How to replace the UV lamp on a Panasia GloEn-Patrol

A. Dismantle the old lamp (Steps 1–6)

B. Install the new lamp (Steps 1–8)

C. Post-replacement checks

• Confirm UV intensity stabilises above your system setpoint after the chamber is refilled and flow is restored.

• Run one short ballast/deballast cycle and review the alarm list — no "UV lamp trouble" and no intensity alarms.

• Log the replacement in the BWMS maintenance record: date, running hours of removed lamps, part numbers fitted. Port state control inspectors and your class surveyor will ask for it.

Part 2 — How to replace the quartz sleeves (lamp sleeves)

The quartz sleeve is what actually protects the lamp and transmits the UV-C dose. Replace it when you see cracks, cloudiness, discolouration, chipping at the ends, or reduced transmittance that does not recover after cleaning. Because the sleeve sits behind the lamp, the practical approach is to replace lamps and sleeves in the same maintenance window — the teardown is identical, so the only extra work is the sleeve itself.

A. Remove the old sleeve

1. Complete the full teardown above, up to and including removing the UV lamp (Steps 1–6). Remember the chamber must be de-energised, drained and depressurised before you pull a sleeve, and the automatic wiper should be parked clear of the sleeve path.

2. With the lamp out, remove the screw plug (Part No. 13) at each end. The O-ring (Part No. 102) on it is a consumable — it will be replaced, not re-used.

3. Withdraw the old quartz sleeve (Part No. 12) straight out along the chamber axis. Support the full length with two hands; quartz is strong in compression but fragile against point loads and side impact.

4. Inspect the bore and the sealing surfaces of the chamber. Wipe away scale, sediment and old O-ring residue with a soft, lint-free cloth. This is the step crews skip and regret — debris left in the seat becomes the leak path on the new sleeve.

5. Put the removed sleeve in a rigid container. Note its condition in the maintenance log (this drives your future replacement interval).

B. Install the new sleeve

1. Inspect the new sleeve for cracks, chips at the flame-polished ends and transit damage before it goes anywhere near the chamber.

2. Fit new O-rings (Part No. 102) on the screw plugs. Lubricate with a small amount of clean water or soapy water only — never petroleum jelly or oil, which attacks the elastomer and contaminates the UV path.

3. Slide the new quartz sleeve in and centre it so it sits evenly at both ends. Do not force it.

4. Refit the screw plugs (Part No. 13) and isolating brackets (Part No. 19) with the 1 pc M4×6L bolts at each end, then the 6 pcs M4×12L round bolts (Part No. 54). Tighten evenly and progressively; over-tightening a single bolt is how quartz ends crack.

C. Leak test and re-commissioning

1. Refill / pressurise the UV chamber and inspect both sleeve ends and screw plugs for weeping or drips. Dry the area first so any new moisture is obvious.

2. Refit the UV lamps following Part 1, refit the side covers (Part No. 64, 65).

3. Power up, confirm every lamp illuminates, and watch the UV intensity trend over the first cycle. Intensity should now sit measurably higher than before at the same water quality and flow — that delta is your proof the fouled or damaged sleeve needed replacing.

Sleeve length, outer diameter and end finish must match the chamber seat exactly. Measure the removed sleeve before ordering.

Practical tip: keep a spare sleeve and a set of O-rings (Part No. 102) on board per chamber. A sleeve is a low-cost part; a chamber that will not hold pressure during a ballast operation is not.

Which UV lamp and quartz sleeve does my Panasia system need?

Fiver Ultraviolet manufactures OEM-equivalent replacement MP UV lamps and quartz sleeves for the Panasia GloEn-Patrol range. Match by total lamp length and wattage:

Both are medium-pressure lamps with broad-spectrum UV-C output, rated for up to 4,000 operating hours, and are dimming-compatible with the original Panasia electronic ballasts so the system's automatic 3-stage UV intensity control keeps working exactly as designed.

Not sure which you have? Measure the old lamp end-to-end (ceramic base to ceramic base) and photograph the terminal configuration. Our technical team will confirm the correct replacement — including the correct terminal option — before you order.

Troubleshooting after replacement

"Two UV lamps trouble" alarm — which lamp is actually faulty?

This alarm confuses a lot of engineers. On the GloEn-Patrol, two UV lamps are wired in series. If either lamp fails, the circuit breaks and the system reports two lamps in trouble, not one. So the alarm count does not tell you how many lamps are bad.

Use the Panasia UV Lamp Test Kit to find the real culprit:

1. Connect the test kit clamps to the UV lamp wires.

2. Press the test button (the unit switches itself off automatically after about 5 seconds).

3. Read the result: UV lamp ON + LED green → the lamp is GOOD; UV lamp OFF + LED red → the lamp is DEFECTIVE, replace it.

Caution: never touch the clamps of the test wires during a test — there is a high risk of electric shock. Wear insulated gloves whenever the test kit is in use.

Test only the lamp pair that the alarm points to, then re-test after replacing: if the alarm persists, the failure is in the second lamp of that series pair or in the supply/ballast side.

UV intensity low, but the lamps are new?

Work through it in this order:

1. Quartz sleeve fouling — the automatic wiper handles routine cleaning, but stubborn scale or organic film needs manual work: isolate power, drain the chamber and wipe the outer wall of the quartz sleeves with alcohol. Fiver replacement sleeves are manufactured for 90%+ UV-C transmittance to keep dose delivery high.

2. New lamps but old sleeves — a fouled sleeve can absorb enough UV-C to mask a fresh lamp's output. This is why we recommend replacing both together.

3. Lamp running hours or power stage — check whether the system has dropped to a lower intensity stage because of turbidity/UVT, rather than a hardware fault.

4. Sensor drift — see calibration below.

Annual UV intensity sensor calibration

Calibrate the UV intensity sensor once a year with a UV reference radiometer (for example a MUV 2.4 WR). If the deviation between the radiometer reading and the sensor output exceeds ±5%, replace the sensor. An uncalibrated sensor either hides a real performance loss or triggers nuisance alarms — both are compliance risks.

A maintenance schedule that prevents unplanned downtime

A single planned maintenance window that changes lamps and sleeves is almost always cheaper than an unplanned one — in parts, in crew hours, and in the risk of a failed discharge at the berth.

Seven mistakes to avoid

1. Not isolating the UV power supply panel breakers — the main breaker alone may not de-energise the lamp circuits.

2. Handling the new lamp with bare hands — fingerprints on the quartz envelope shorten lamp life.

3. Reusing the old O-ring (Part No. 102) — always fit new ones; they are the primary seal.

4. Over-tightening the M4 bolts — this is the fastest way to crack a quartz sleeve end. Tighten evenly, in a cross pattern.

5. Replacing lamps but leaving fouled sleeves in place — the new lamps will underperform and you will be back inside the chamber within weeks.

6. Ignoring the two-lamps-in-series logic — always identify the genuinely failed lamp with the test kit before ordering spares.

7. Not logging the change — running hours and part numbers on record are your evidence of a maintained, compliant BWMS.

Safety, mercury handling and disposal

• UV radiation: do not look at an energised lamp without UV-rated eye protection, and do not operate the chamber with covers removed.

• Heat: medium-pressure lamps reach very high surface temperatures; allow the full cooling period before handling.

• Mercury: lamps contain trace mercury. Keep spares in their packaging until installation. If a lamp breaks, collect the fragments immediately in a sealed container to limit mercury vapour release, ventilate the space, and dispose of the waste through a facility authorised for mercury-containing lamps — never in general ship's waste.

• Explosion-proof chambers (PU###-Ex): the lamps themselves are the same as standard models, but the power supply wiring must use intrinsically safe cable and maintain the required minimum separation from standard cables. Do not improvise cable routing.

Frequently asked questions

Final thoughts

The GloEn-Patrol UV chamber is a simple system with one unforgiving requirement: the right dose at the right time. Lamps and quartz sleeves are the two parts that decide whether you meet it. Follow the six-step teardown, keep the M4 bolts and the O-ring (Part No. 102) in the right places, never touch quartz with bare hands, and use the UV Lamp Test Kit to diagnose the series-circuit alarms correctly — and the job is a routine maintenance task instead of a portside emergency.

Replacing equipment on a different UV BWTS? Read our sister guide: How to Replace UV Lamps and Quartz Sleeves for Alfa Laval PureBallast BWTS.