Displaying Temperature Sensors; Compressor Restart Time Delay; Alarm Output Contact; Alarm Input Connection - nVent Hoffman SpectraCool Slim Fit Instruction Manual

DISPLAYING TEMPERATURE SENSORS

Both the air inlet sensor (b01) and outlet or evaporator coil sensor (b02), can be viewed at any time by
pressing the "up" or "down" arrow button on the front panel of the controller display. The display will revert to
the temperature sensor number b01 (air inlet temperature) or b02 (air outlet temperature) after 60 seconds.
Both sensors can also be read through the Ethernet and USB connections with the optional remote access
communication board.

COMPRESSOR RESTART TIME DELAY

A factory set 5-minute (300 second) restart delay exists to reduce residual back pressure before allowing the
compressor to restart. The compressor will stay OFF for the entire restart duration after the compressor is
disabled. A ����� on the controller display will indicate the unit is in a compressor restart delay while calling
for cooling. If the time delay is reduced to less than 5 minutes, this may cause reduced compressor life.

ALARM OUTPUT CONTACT

The smart controller has a normally open dry contact alarm output with a resistive load rating of 250 VAC to 3
Amp. The 6-POS connector terminals 3 and 4 (marked YEL/ALARM) located on the enclosure side of the unit
provides connection to this output.

ALARM INPUT CONNECTION

The smart controller can accept a dry contact/switch input via the 6-POS connector terminals 1 and 2 (marked
WHT/DS1 and WHT/DS2), located on the enclosure side of the unit. This input is associated with the controller
display alarm mnemonic "tP" (door open and/or smoke detected). Note that the door open and/or smoke
detected is pre-pr ogrammed at the factory as "Normally Open".
To use the door open and/or smoke detected feature, simply connect the customer supplied wires from the
enclosure door switch to DS1 and DS2.
SLIM FIT MASTER SLAVE HARNESS – OPTIMIZED
Connect the door open and/or smoke detected harness to the DS1 and DS2 terminals on the enclosure side of
the air conditioner unit in parallel. The maximum length of the door switch harness between two air conditioners
is 3.33 meters (10 feet). This harness is NOT included with the Master/Slave option. It is offered separately as an
accessory under part number SLIMFITMSHARNESS.
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