MANUALPC-2010 CHAPTER IV - OPERATION Page 43
6.6 - Heater Delay (Cooldown Safety)
The cooldown safety (or Fireman) is a delay for heater
cooldown before shutoff of the main recirculation pump. It is
used to protect the heater from overheating due to lack of
water circulation.
The minimum value recommended by most heater
manufacturers is 20 minutes. When the pump is programmed
to turn off, it turns the heater off immediately and then waits 20
minutes for the water to cool down before it actually shuts off
the recirculation pump.
In case of emergency, the main power supply to the pump
should be turned off at the main circuit breaker.
6.7 - Water Level Control
The water level in the pool can be maintained automatically
with a water level sensor (OPTION LEVEL) and fill valve.
The sensor is an electro-optical sensor P/N 138167 (Figure 23,
Page 19) that can be located in the pool or in the surge pit
(Figure 25, Page 19).
The sensor uses the reflection of a LED beam inside a prism to
determine the position of the water level (see Figure 24, Page
19). With no liquid present, the light beam from the LED is
reflected within the prism to the receiver. When the liquid level
reaches the prism, the index of refraction is changed and the
beam does not reflect into the receiver. For best results, the
surface of the prism must remain clean.
Submenu 6.7 is used to set the automatic fill valve to OFF,
Manual or AUTO. During fill, chemistry adjustment can be put
on hold by setting the Feed lockout option to YES. The
submenu also allows the setting of a Time Limit for valve
actuation to avoid overfilling. Line 4 displays the actual and
cumulative run times for water filling.
Submenu 6.7 also allows to set the high level alarm safety
feature for PC7000 controllers, used during filter backwash to
avoid overflowing the waste pit. When set to YES, the
controller senses the input of the "high level" sensor and will
shut off the backwash cycle if a high level is detected.
Submenu 6.6
Submenu 6.7
Heater cooldown
before Pump Shutoff
Minimum: 20 mn
Feed lockout Yes
Time Limit mn 10
Run Time 5 15
Alarm high No
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