Rocket Giotto & Mozzafiato Cronometro V User Guide & Cleaning

← All How guides

These are tank-fed heat-exchanger machines, so you can brew and steam at the same time. The steps below follow Rocket’s user manual, which covers the Giotto and Mozzafiato Cronometro V.

Which models this covers: The Giotto Cronometro V and Mozzafiato Cronometro V (stainless or black) share the same inside: E61 group, 1.8 L heat-exchanger boiler, vibration pump, PID and Cronometro shot timer. Only the body panels differ, so one guide covers both.

Jump to: Before first use: water and start-up · Making espresso and using the shot timer · Steaming milk, hot water and Eco mode · Daily cleaning (2 minutes) · Every 2–3 weeks: cleaner backflush · Water and servicing

Before first use: water and start-up

  1. Fill the water tank with fresh filtered water and press it down firmly so the tank valve is fully engaged.
  2. With the group lever down, switch the machine on. It fills the boiler and starts heating.
  3. Give the E61 group time to heat right through before your first shot – the boiler gauge settles once it is up to pressure.
  4. Open the steam valve briefly to release trapped air, then run a cup of water through the group.

Making espresso and using the shot timer

  1. Flush a little water through the group, then dose, tamp and lock in the portafilter.
  2. Raise the lever to start the shot. The Cronometro display counts the seconds while you brew; lower the lever to stop.
  3. Use the timer with your scale to dial in: grind finer if the shot runs too fast, coarser if it runs too slow.
  4. The PID lets you fine-tune boiler pressure and with it brew temperature – see the programming section of Rocket’s manual, or call us and we’ll set it for your beans.

Steaming milk, hot water and Eco mode

  1. Purge the wand, texture the milk with the tip just under the surface, then lower it to heat. Close the valve before removing the jug.
  2. Wipe and purge the wand straight after every use.
  3. Use the hot water valve for tea or warming cups – the water is very hot.
  4. Eco mode: the Eco button is under the machine (button in = Eco on). With Eco on, the machine switches off 90 minutes after the last shot. Lift the group lever up and down to wake it.

Daily cleaning (2 minutes)

  1. With the machine hot, take the coffee basket out of the portafilter and fit the blind filter (the basket with no holes) supplied with your machine.
  2. Lock the portafilter into the group and run the pump for about 10 seconds, then stop. Water and coffee oils flow back out through the group into the drip tray. Repeat 4–5 times until the water runs clear. This is a water-only backflush – no cleaner needed day to day.
  3. Brush the shower screen and group gasket with a group head brush and wipe away any visible coffee, without taking parts apart.
  4. Rinse the portafilter and baskets in warm water and wipe them dry.
  5. Wipe the steam wand with a damp cloth straight after each use and give it a short purge to clear milk from the tip.
  6. Empty and rinse the drip tray before it gets full, and keep the water tank clean and filled with fresh water.

Every 2–3 weeks: cleaner backflush

For home use, a backflush with espresso machine cleaner every 2–3 weeks keeps the group fresh. Rinse thoroughly with water afterwards so no cleaner is left in the group.

  1. Heat the machine up fully and brush the shower screen and gasket.
  2. Fit the blind filter and add a small scoop (about 3–5 g, or the amount on the pack) of espresso machine cleaner such as Cafetto Espresso Cleaner or Cafetto EVO.
  3. Lock the portafilter in and run the pump for about 10 seconds, then stop and let the cleaner soak for 10–20 seconds. Repeat several times.
  4. Remove the portafilter, rinse the blind filter and portafilter, then backflush again with water only until no cleaner foam or smell remains.
  5. Run some fresh water through the group without the portafilter, refit your normal basket and pull one shot to discard.
  6. While the cleaner is out, you can soak the metal portafilter head and baskets (not the handle) in hot water with a little cleaner for 10 minutes, then rinse well.

Water and servicing

  • Descaling: leave this to us. Your machine should only be descaled by a qualified technician as part of its service. Call 1300 357 575 to book.
  • Prevent scale instead: always fill the tank with fresh, filtered water. Don’t use distilled water – the machine needs some minerals for its water-level sensors to work.
  • Book a service every 12 months for home use, or every 6 months for cafés and busy commercial sites, so seals, gaskets and valves are checked before they wear.

Reorder cleaning supplies

Prefer to order by phone? Call us on 1300 357 575.

Official manual and resources

  • Rocket Espresso user manual (covers Giotto & Mozzafiato Cronometro V): Supplied with the machine; Rocket does not offer a public download on rocket-espresso.com. Misplaced yours? Call us on 1300 357 575 and we’ll help.
  • Official YouTube channel: Rocket Espresso

Shop this model

Need a hand?

Call Coffee Machines and Beans on 1300 357 575, or book a service.
1/48 Shandan Circuit, Albion Park Rail NSW 2527

Servicing: home users should have their machine serviced every 12 months; cafés and other busy commercial sites every 6 months.

Written steps are based on Rocket Espresso’s user manuals. Always follow the manual supplied with your machine.