Setting Up a ResMed S9 CPAP Machine

The ResMed S9 is an older ResMed CPAP series still in use by some patients. This guide covers general, non-prescriptive setup steps — connecting the machine and preparing it for use — not pressure settings, which should only be changed by, or under the direction of, your prescriber.

Before you start

• Confirm you have your prescription details on hand, or that the team has already configured the machine to your prescription at delivery.
• Place the machine on a firm, flat surface below head height, near a power outlet.

General setup steps

1. Connect the power supply to the machine and to the wall outlet.
2. Attach the air tubing to the air outlet on the machine.
3. Fill the humidifier chamber (if your unit has one) with distilled or clean water, up to the marked fill line, and reinsert it into the machine.
4. Attach your mask to the other end of the tubing, following your mask's own fitting instructions.
5. Turn the machine on and check that air flows through the mask before putting it on.

What not to do yourself

• Do not change your prescribed pressure setting. If the pressure feels wrong — too strong, too weak, or uncomfortable — that's a sign to speak with your prescriber or the team, not to adjust it yourself. See our guide on CPAP pressure problems for what those signs can mean.
• Do not attempt clinical mode changes (e.g., switching between fixed and Auto modes) without your prescriber's direction — these settings are chosen based on your diagnosis.

Ongoing care

Regular cleaning of the mask, tubing, and humidifier chamber matters for hygiene and machine longevity — see our guide on common CPAP cleaning mistakes.

If you need help

If you're setting up a machine bought or rented through CPAP Pakistan and something isn't working as expected, contact the team rather than troubleshooting the pressure settings yourself — they can talk you through the specific unit and confirm it matches your prescription.