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Operation
Refer to the wiring diagram provided in the submittal package, also located on the inside
of the heater control panel door. Ensure that the element is completely submerged before
energizing the main disconnect. The combination temperature/low level control is preset to
energize the heater at 40°F (4.4°C), but will not energize if the water level is too low or if
the water temperature is above 45°F (7.2°C).
Testing the heater when water temperatures are above 45°F (7.2°C):
• Disconnect the heater control panel and tag out the circuit.
• Remove the heater control panel cover.
• Remove the sensor wires connected to terminals T1 and T2 on the combination
temperature/low level control and isolate them.
• Install the 1.5K ohm test resistor supplied with the heater control panel (in bag on
outside of cover) across terminals T1 and T2.
• Install the heater control panel cover.
• Energize the system and listen for the contactor closing.
• After operation, de-energize the circuit, disconnect the heater control panel, and tag
out the circuit.
• Remove the resistor and place it back in the storage bag. Check all connections,
reconnect sensor wires per the wiring diagram to terminals T1 and T2, replace the
cover, and place the system back in service.
Operation when the sensor probe is encased in ice
:
• Disconnect the heater control panel and tag out the circuit.
• Remove the heater control panel cover.
• Install a jumper wire across terminals G1 and G2 on the combination temperature/low
level control circuit board.
• Install the heater control panel cover.
• Energize the system and listen for the contactor closing.
• Operate the system until the ice is melted around the probe.
• After operation, de-energize the circuit, disconnect the heater control panel, and tag
out the circuit.
• Remove the jumper, check all connections, replace the cover, and place the system
back in service.
WARNING:
Dangerous voltages
are present in this equipment.
Disconnect the electrical service
of the source and tag the circuit
out before servicing or replacing
components.
NOTICE:
Do not operate the system
unattended or for extended periods
of time during test mode (resistor
across terminals T1 and T2).
Operation in water temperatures
above 45°F (7.2°C) could damage
the unit.
NOTICE:
Do not operate the
system unattended or for extended
periods of time with terminals
G1-G2 jumpered. A low liquid level
condition could occur, and the
system will not shut off which could
result in damage to the heater and
unit.
Operation Considerations
for Accessories
Basin Heater and Stand Alone
BAC Heater Control Panel
(Optional)
Содержание NEXUS NXF-0403N-CS2TS-H1
Страница 1: ...OPERATION MAINTENANCE MANUAL...
