MAINTENANCE MANUAL
Speedster
page 34
Clean probes, level and safety
Two probes are mounted in the hot water/steam boiler. The lower probe checks the
water safety level. Power to the heating elements in the Speedster (both hot water/
steam boiler and coffee boiler) is disconnected when water level is lower than this probe.
The upper probe checks the water level in the hot water/steam boiler for normal
operation; when water level is below the probe, the boiler will start filling with the pump
engaged, provided that no shot is being pulled. The boiler stops filling when water level
reaches the probe.
Precipitation on the probes will act as (electrical) insulation, thus inhibiting proper
functioning of the probes.
Figure 21. Showing safety level (lower) and operating level (upper) probes. The element
cover has been removed.
Materials needed
Spanner 13 mm, 17 mm, 19 mm
Adjustable spanner
Allen key 2.5 mm, 3 mm
Drain hose with fitting (included in shipment)
Bucket
Flat screwdriver no.2
Loctite or Teflon tape
Procedure
1.
Close water mains.
2.
Switch power “off”, unplug machine from AC outlet.
3.
Open steam valve until no more steam escapes the machine. This is to release
pressure from hot water/steam boiler, keep valve open.
4.
Remove both side panels and upper body panel.
5.
Drain water from hot water/steam boiler: remove plug (or cap in older model)
from the hot water/steam boiler drain valve with a 17 mm spanner (see figure
21). Insert the fitting of the drain hose in the open end of the drain valve, dangle
the other end in the bucket. Open drain valve on steam/hot water boiler until
water stops running. Close drain valve, remove drain hose and fitting, replace
plug.
6.
Remove the element cover with spanner 13 mm.
operating level probe
safety level probe
level control unit
drain valve
