Trebor IQ Chemical Heater - Manual (Page 6)

PAGE 6 MODEL IQ CHEMICAL HEATER OPERATION / MAINTENANCE MANUAL
2.2.b Warning
A Warning message indicates a potentially
hazardous situation that, if not avoided,
could result in serious injury. A typical
example of a Warning message: Warning
Hazardous Voltage
Voltage or current
hazard sufficient to
cause shock, burn or
death. Disconnect and
lockout power before
servicing.
2.2.c Danger
A Danger message indicates an imminently hazardous situation that, if
not avoided, will result in death or serious injury. Messages identified by
the word Danger are used sparingly and only for those situations
presenting the most serious hazards
2.3 HEATER INTERLOCKS
2.3.a Leak Sensor
The Trebor IQ chemical heater is supplied with a 24Vdc conductive liquid
leak sensor. Note, two modes of operation are available
– NPN (normally
open) and PNP (normally closed).
An integrated magnetic reed switch allows a non-intrusive method for
verification of sensor operation. Pass a magnet next to the area near the
heater bottom, labeled “LEAK SENSOR TEST” to engage the reed switch
and alarm the leak sensor, see Figure 2-1. See Section 7 for wiring
instructions.