Dometic DX Remote & Self-Contained A/C, Installation And Operation Manual

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English L-2086 Operation
DX Remote & Self-Contained A/C Systems • Operation
Operating Instructions - Rotary
Controls
SA & SSA Models
1. Open the seawater inlet valve.
2. Set the OFF - - ON knob to the OFF position.
3. Turn on the main circuit breakers on your boat’s electrical
panel designated for the air conditioning unit. If there is
more than one air conditioning system on board, you must
also turn on the breaker for the seawater pump.
4. Set the thermostat by turning the knob (WARMER/
COOLER) to the desired mode of operation.
5. Set the fan speed control to (HIGH).
6. Turn the top control knob to to energize the blower.
7. Turn the top control knob to ON. The compressor will start,
and the unit will begin to cool or heat, depending on which
mode of operation you have selected. Verify that water is
flowing from the overboard discharge.
8. To set the thermostat, allow the unit to operate until the
area is cooled or heated to the desired temperature. At
this point, turn the knob (WARMER/COOLER) slowly
toward the center position until you hear it “click” once. The
thermostat is now set to maintain the desired temperature.
9. Set the fan speed to provide the desired flow of air, using
the center knob.
10. If you turn the system off, or if you wish to switch between
cooling and heating, wait three minutes to allow the sys-
tem’s internal pressures to equalize before attempting to
restart.
Hint
It is good practice to check for seawater flow by observing the
overboard discharge when the system is first turned on. If you
do not observe steady water flow, shut the system down and
check for obstructions in the seawater cooling system.
Operation Instructions - SMX
Controls
There are two different SMX control systems available, SMX II
and SMX Net. The following are basic operation instructions for
both systems. For complete installation and operation infor-
mation, consult the appropriate manual, L-2066 for SMX II or
L-2067 for SMX Net.
SMX II/SMX Net Operation
1. Open seacock (seawater inlet valve).
2. Turn on main circuit breakers for the air conditioning sys-
tem. If there is more than one unit on board, you must also
turn on the breaker for the seawater pump.
3. Adjust SMX settings as desired.
Hint
It is good practice to check for seawater flow by observing the
overboard discharge when the system is first turned on. If you
do not observe steady water flow, shut the system down and
check the seawater system.
Power On
When AC power is applied to the system at the circuit breaker,
the SMX microprocessor retrieves from permanent memory
the last operating configuration. This process takes about four
seconds, after which the system will begin operating just as it
had been when power was last turned off.
System Off
Press the OFF key to turn the system off. Note that the data
display remains energized even when the system is off. The fan
can be turned on manually when the system is in the off mode.
Note
The SMX has built-in protection against sudden power interrup-
tions. The system automatically stores the current operating
configuration in permanent memory every time you make
changes. (The new operation mode must be in affect for 10
seconds before it is saved into permanent memory.) When AC
power is lost, the SMX system retains these settings, and when
AC power is restored it resumes operation using the same
settings as before.
Selecting Setpoint
Press the SET key and the current setpoint will be displayed.
Press the UP or DOWN key to change the setpoint.
Displaying Temperature
To display cabin temperature, press the TEMP key.
SMX II Only
Press TEMP a second time for an alternating display of inside
temperature and setpoint. Press a third time to return to inside
temperature only.