Start with your surface list, not with the machine
Ask the supplier to walk the site with you and build a list of the surfaces the cleaning will cover. For each one, record the deposit (loose dust, oil or grease film, dried residue, fatty residue at a food-handling point, or a mixed film), the surface material and its condition, and how the operator reaches it. Where the deposit is a compacted or baked film, the pass takes longer and dwell matters more than water volume; where it is loose soiling, volume and reach matter more. This list is what turns a catalogue page into a configuration, and it is also the document you will later mark up with trial results.
Condition comes before method. A joint, seal, bearing face, electrical enclosure or painted area that is already damaged will not tolerate a wet pass that a sound one survives. Anything questionable should be inspected and, where needed, repaired before the supplier proposes a mode of working for it.
Choose the mobile configuration from how the unit travels and how it is fed
In this supplier's range, the driving-style mobile machines are described as active-water cleaning machines with dry-steam, wet-steam and hot-water modes, positioned for indoor garages and narrow outdoor parking spaces. The hand-pushed models are described as high-temperature, high-pressure machines with dry- and wet-steam modes and are listed for cleaning and disinfecting hospital beds and medical machinery. Those descriptions drive two separate questions the supplier must answer for your site.
First, travel. Ask how far the unit has to be pushed or driven between passes, what the wheel path is over (kerbs, thresholds, drainage channels, expansion joints, cable covers) and whether the machine's own dimensions and handles clear the doorways, aisles and corners on your route. A configuration that fails at a doorway will be worked around by the operator, and that workaround is what damages surfaces.
Second, feed. Ask, for the exact unit quoted, the working voltage, the socket or supply the site has to provide, the cable length and how the cable is protected in a wet area, and the water supply arrangement including the inlet fitting on the machine against the tap or hose bib on your site. On the driving-style units, ask specifically whether the variant supplied includes the battery, what the working supply arrangement is, and what run time the supplier states for the exact machine, not for the range. A missing battery, a short cable or a mismatched water fitting is the most common reason a delivered machine does not start on the day.
Do not carry figures from one product page to another. The fixed and hand-pushed pages in this range publish different fields, and some fields, such as steam temperature, steam pressure, tank capacity, battery capacity and run time, are not published for every model. Ask for the fields you need in writing for the exact model and variant, and treat any figure taken from a different page as unconfirmed.
Set mode, reach and consumables per surface, not per machine
Once the surfaces and the machine are known, the supplier should state for each surface group which mode is used and why. A vertical or overhead surface with a light film is usually a shorter dwell with a slower, closer pass; a horizontal surface holding residue is governed by how the residue is lifted and where it goes, not by the spray. Dry and wet modes are not a strength control; they change how much water reaches the surface, and water is what creates run-off, slip risk and drying time. Ask the supplier to write the mode against each row of your surface list.
Then fix the reach. The nozzle, extension, brush and lance selection determines whether the operator can work a joint, a corner, the base of a wall-hung fixture or the lower band of a cabinet without improvising. Ask which accessories are included with the unit quoted and which are separate, and have the supplier confirm that the accessory set covers the tight geometry found on your list.
Finally, name the consumables and the waste. Consumable items, filter elements where fitted, the cleaning agents if any are permitted by the surface and by your own site rules, and the route for run-off water all belong in the configuration and in the cost. Run-off should be written as a route, with the drain or collection point named and signed off by the site, because it decides the sequence of work and how much shielding is required.
Put exclusions and boundaries in writing before any pass
A serious supplier configuration has an exclusion column. Typical entries on an industrial or commercial site are electrical enclosures, terminal boxes, bearing and seal faces, open drive components, lubricated surfaces where the lubricant must stay in place, brake friction surfaces, unbonded or already failing paint, decals and vinyl, and any assembly whose maker has not confirmed that steam or hot water is acceptable. Each exclusion should carry a fallback method and the trade that performs it, so the plan does not stall when the crew reaches it.
Ask the supplier to list the protective features fitted to the machine being quoted, with no assumption carried across from a sibling model. Leakage, short-circuit, over-temperature, over-voltage and water-shortage protection appear on pages in this range, and the fixed-unit page additionally carries a high-voltage-explosion entry; the item set is not identical across models, so confirm the list for the exact unit. Do not infer a vacuum capability from a related page either: one model page in this range carries a vacuum row while another does not, and the range pages describe vehicle interior vacuuming on the fixed unit.
Run one bounded trial and accept it against photographs
Ask the supplier to run a short trial on a low-traffic representative area before your whole site is released to the machine. Mark the patches, take before photographs, agree the after photographs and the acceptance wording before the first pass, and record for each patch the surface, the deposit, the mode, the pass count, the drying result and any defect route. Fix the stop conditions at the same time, so the trial can be halted on a defined finding instead of argued about afterwards. A supplier who will not write stop conditions is selling a machine, not a configuration.
Have at least two measured runs over the same area with the configuration frozen. Those runs are the only defensible basis for a cycle time, and a cycle time taken from a supplier's marketing page will not survive a comparison exercise.
Ask for the handover documents by name
A configuration is complete when the supplier hands over: the site surface list with the mode and reach written per row; the machine data sheet for the exact model and variant with the fields you asked for answered in writing; the exclusion list with fallbacks; the protective-feature list for the machine quoted; the consumables and spare-items list; the set-up instructions covering power and water connection, the shield list and the run-off route; operator instruction for the surfaces you actually have; a service and response arrangement with the response terms defined rather than assumed; and a dated one-page standard for each machine family, with a review date, trained in place on your own surfaces.
If you need the supplier to change the tank, supply arrangement, enclosure, accessory set or the modes offered so that the machine fits your site rather than the other way round, that is a separate conversation and should be raised before the machine is quoted. Details of what this supplier's engineering and customisation work covers are on the customized steam cleaning equipment page.
Check the machine against the range before you commit
Read the configuration against the published range so you know which claims came from a product page and which came from your trial. The cleaning range itself is listed at PowerDe cleaning equipment, and the driving-style mobile machine family, listed for indoor garages and narrow outdoor parking spaces, is on the PowerDe PWD01 steam cleaner page. Use those pages to identify the machine family, then hold the supplier to the answers for the exact unit and to the results of your own trial before any site-wide order.
