Heat Pump Commissioning Manifold Readiness Checklist Uk

Direct answer: the night before a locked UK heat-pump commissioning window, confirm the refrigerant profile, pressure-rated hoses and fittings, OFN test path, vacuum verification plan and F-Gas paperwork. Do this before you worry about whether the gauge display looks modern.

Commissioning days are social as much as technical: the customer, electrician, builder and your next job are often already scheduled. A missing adaptor or uncertain refrigerant profile can waste more trust than the part is worth.

Overnight checklist

• Match the outdoor unit nameplate and manual to the refrigerant profile you will select.
• Confirm hose pressure rating, hose ends and any 5/16in adaptors needed for the service ports.
• Stage OFN pressure-test equipment and make sure your manifold arrangement fits the test path.
• Plan vacuum verification with a dedicated vacuum gauge where the manufacturer or SOP requires micron-level evidence.
• Check scales, recovery gear, leak detector, batteries, spare gaskets and blanking caps.
• Put F-Gas personal evidence and any company paperwork required by the job pack in reach.

Why paperwork is part of readiness

GOV.UK F-Gas qualification guidance says qualified individuals are required for RACHP activities such as installation, servicing, leak checking and recovery. Manufacturer guidance also matters: this Daikin R32 installer reference guide states that installation, testing and applied materials must follow the documentation and applicable legislation and be performed by qualified persons.

Commissioning records are not just private notes. The HHIC heat pump commissioning checklist shows the kind of commissioning fields and competent-person detail that can appear in heat-pump handover practice, including F-Gas information for applicable split systems.

Commissioning-day sequence

1. Before leaving: recheck ports, adaptors and batteries.
2. On arrival: compare the installed unit against the manual and job notes.
3. Pressure test: follow manufacturer and company procedure; record readings and time where required.
4. Evacuate and verify: do not use a pressure manifold display as a substitute for a required micron vacuum gauge.
5. Charge or release charge according to the equipment instructions and qualified procedure.
6. Handover: record refrigerant, readings, tool identity/calibration status where your SOP demands it, and any exceptions.

Who should not proceed

Do not proceed as a DIY homeowner, as an unqualified person handling refrigerant, or as a technician missing the required hose/fitting path. Also pause if you are relying on a “next-day dispatch” phrase without confirming delivery to your postcode and cut-off time.

Conditional next step

If your install-day work only needs a two-valve pressure and saturation-temperature workflow and you have separately confirmed hoses, fittings and vacuum verification tools, a same-site option such as this DMG-2SE product route is relevant to compare. If you need clamp-logged commissioning or four-valve staging, specify that before buying.