Second-Week Helper, 3.2 m Wall and a Customer in a Hurry
A two-person crew must install a 1.0 HP split-type unit in a 12 m² office before the building closes at 17:00; they arrive at 14:30 and the electrical rough-in is not finished. The indoor unit mounts at 3.2 m on a concrete wall. The crew has one 1.8 m aluminium step ladder, no harness, no mobile scaffold, and a helper on his second week who has never set an anchor. The ladder must be set at roughly 75°, and the helper proposes standing on a plastic monobloc chair on polished tile while the technician steadies the indoor unit by hand. The customer adds three requests: reuse the existing R-22 copper lines for the new R-32 unit to save money, discharge the condensate drain onto the public walkway below the bracket, and take the signed completion form now because the manager will "just sign it later".
1. What should the crew do before any further anchor work, and why?
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Stop the anchor work. A plastic chair on polished tile is not a work platform; a fall from 2.4 m onto tile can be fatal, and the technician cannot steady a 10 kg indoor unit by hand and arrest a fall at the same time.
Work above about 1.8 m needs a stable platform and fall protection. A step ladder is for access, not for two-handed work at height, and having the helper foot it does not fix that. The realistic decision at 14:30 is to reschedule and bring a mobile tower or a platform, or to add a third person - not to improvise.
Also: a second-week helper does not set anchors unsupervised; brief him on what he may and may not do, keep the drop zone barricaded, tether tools, and record the delay and its cause. The technician who signs the job owns the safety decisions made on it, and "the customer was in a hurry" is not a defence after an incident.
2. How should the crew answer each of the customer's three requests?
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Reusing the R-22 lines for R-32: do not simply agree or simply refuse - assess it against the manual. R-32 systems specify a minimum wall thickness and clean, oil-free tubing; residual mineral oil and moisture from the old system contaminate the new POE charge, and the old flares are already formed and possibly work-hardened. If the wall thickness can be verified, cut back the ends, re-flare, blow through with nitrogen and pressure-test at the higher test pressure; if it cannot be verified, replace the line set and say so in writing. R-32 is A2L, so every joint inside an occupied office matters more, not less.
Drain onto a public walkway: no. It is a slip hazard and a complaint waiting to happen; route it to a drain, a soakaway or a small condensate pump.
Pre-signed completion form: no. The form certifies readings and tests that have not been performed; signing early falsifies a quality record and removes the customer's chance to witness the commissioning. Offer a signed handover at the end, with the readings attached.
3. Describe the teamwork, communication and documentation plan for the remaining work and handover.
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Run a five-minute toolbox talk: assign roles (technician on the unit, helper on tools, materials and floor control), sequence the job backwards from 17:00, and agree a checkpoint before energising - insulation resistance and earth continuity measured and recorded, flare torque checked, vacuum held, drain proved with a litre of water.
Tell the customer what changed and why, before work resumes: safe access needs a platform, and the line set decision affects both time and cost. Give the revised completion time in plain language and confirm it in writing - a short message is enough.
Handover: demonstrate cooling, show the remote settings, walk the customer through the drain route and the filter cleaning interval, hand over the manual and warranty card, and obtain the signature on a form that carries real readings. The quality standard is not "it runs" - it is the recorded evidence that each test was performed, by whom, and with what result.