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DuraSea Condenser Installation, Start-Up & Service Manual
Electrical Connections
Figure 6: 24VAC Wiring Diagram
T
HERMOSTAT
Install an approved accessory thermostat according to installation instructions included with the accessory. Locate the
thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat
installation instructions. DuraSea unit is a single-stage cooling unit. Use a single stage cooling thermostat. Select a thermostat
cable or equivalent single leads of different colors. Check the thermostat installation instructions for additional features which
might require additional conductors in the cable. For wire runs up to 50 ft. (15 m), use no. 18 AWG (American Wire Gage)
insulated wire (35 C minimum). For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulated wire (35 C minimum). For over 75 ft. (23
m), use no. 14 AWG insulated wire (35 C minimum). All wire sizes larger than no. 18 AWG cannot be directly connected to the
thermostat and will require a junction box and splice at the thermostat.
24VAC C
ONTROLS
Most commercial evaporator units include a transformer to provide 24VAC to provide power for thermostat. Dometic Marine
evaporators do not include a 24VAC output. In this instance the optional DuraSea 24VAC control box can be used to provide
24VAC power source to operate the DuraSea condenser fan, compressor, and indoor fan motor contactor (or control relay).
Additional devices may also include a liquid line solenoid valve, supplemental electric heater contactors or control relays and
other devices selected by system designer. Ensure the transformer is sized to handle additional power requirement of
supplemental devices.
14
L-3153
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