MAINTENANCE MANUAL
Speedster page 27
Safety valve on steam boiler
When the safety valve on the steam/hot water boiler is malfunctioning it will open at a
(much) lower than operating pressure (2.4-2.5 Bar). When this occurs, The safety valve
has to be replaced
A malfunction of the safety valve is recognised by a continuous hissing sound combined
with the lack of pressure and temperature building up while the heater in the steam/hot
water boiler is engaged continuously and the boiler is filled automatically once in a while.
(However, a malfunctioning anti-vacuum valve leads to similar symptoms.)
Check safety valve
Materials needed
Spanner 13 mm
Procedure
1. Remove right hand side panel.
2. Pull black silicone drain hose from safety valve (see figure 13).
3. Check for leakage, the hose should be dry and should not show evidence for
leakage (detrital build-up) on the inside.
4. If necessary, replace safety valve (see below).
5. Remount hose.
6. Mount right side panel.
Replace safety valve
Materials needed
Spanner 13 mm, 15 mm, (ring) 18 mm
Allen key 3 mm
Replacement safety valve
Loctite or Teflon tape
Procedure
1. Turn main switch of your Speedster to “off”.
2. Open the steam valve to let off steam, this will relieve the excess pressure in the
steam/hot water boiler.
3. In the meantime, remove left and right side panels first, then remove upper body
panel.
4. Pull black silicone drain hose from the safety valve (see figure 13).
5. When pressure in boiler has dropped, remove the safety valve from the fitting in
the boiler with a 15 mm spanner, retain the fitting with a 18 mm (ring) spanner.
Note. The valve is mounted with Loctite to ensure sealing, you may need a little
extra torque to loosen it.
6. Clean inside threads of the fitting as well as possible.
7. Apply a few drops of Loctite or a few windings of Teflon tape to the threads of the
replacement safety valve and mount in fitting on boiler.
8. Turn machine “on”, wait until pressure has built up.
9. Check valve and sealing for leakage.
10. Remount hose.
11. Mount upper body panel first, then both side panels.
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