Safety And Control Devices; Exploded Views - Johnson Pump SPX AquaH Handbuch

• Electrical heater element: the appliance is equipped with
an electrical heater element at 1200W-230V~ or 500W-
230V~ in order to heat water even when the boat engine is
off (for example when the boat is in the dock). Material :
corrosion resistant alloy INCOLOY.

5. SAFETY AND CONTROL DEVICES

• Pressure relief and non-return valve: it is a non-return
valve, preventing hot water backflow into the cold water
supply; it is also a pressure relief valve, protecting the tank
against possible excessive pressure caused by water
while heating. The water is discharged from a suitable
drain, which the valve is equipped with.

6. EXPLODED VIEWS

fig. 6-1
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fig. 4-2
fig. 4-3:
electrical
heater
element
manuals search engine
fig. 5-1: pressure relief and non return
valve
Technical data
Body
Calibration
• High limit temperature thermostat: it is assembled
inside the electrical heater element and it acts as:
1. adjustable thermostat: it cuts off the electrical supply
to the heater element as the pre-set temperature is
achieved (the temperature can be set between 0° C
and 70° C, according to the user's needs).
2. safety thermostat: it cuts off the electrical supply to
the heater element when, in case of bad operation of
the appliance, the temperature of the water reaches
90° C. A manual intervention is needed to start up t he
appliance again (manual reset).
Temperature range
Temperature differential
Intervention temperature
Maximum rating
Maximum temperature
1. cover
2. gasket
3. fitting 14x1/2" M
4. 1/2" pressure relief and non-return valve
5. cable gland
6. adjustable thermostat
7. electrical heater element
8. insulated tank with plastic covers
2 - ENGLISH
2010-03
brass Ot 58
6 ± 0,5 bar
fig. 5-2:
thermostat
from 0 ° C (pos.1)
to 70 ° C (pos.5)
about 9 ° C
90 ° C
16 A
120 ° C