Marine Air Systems vector compact - Manual Control Panel (MCP) Installation; Manual Control Panel (MCP) Operation

MANUAL CONTROL PANEL (MCP) INSTALLATION
The MCP should be located within cap tube length of the a/c unit. The 3 knob MCP is configured
either vertically (shown) or horizontally. The cut out size is 2.5" by 7.0", see MCP for orientation.
Once the cut out is made, carefully uncoil the copper cap tube with return air sensor (copper bulb) and
route the control wires and cap tube through the hole and back to the a/c unit using caution not to kink
the cap tube. Mount the return air sensor into the clips provided on the evaporator coil. If the return
air sensor cannot be mounted on the evaporator coil, mount it behind the return air grille. The sensor
must be mounted in the return air stream. Make electrical connections according to the wiring diagram
found in the electric box and/or in the operations manual.
MCP OPERATION
1) Ensure seawater intake ball valve (sea cock) is open.
2) Turn SYSTEM SWITCH control knob to OFF.
3) Turn on AC circuit breaker. If the seawater pump has
its own circuit breaker, turn that on too.
4) Turn the SYSTEM SWITCH control knob to START;
this energizes the fan and seawater pump. Turn
THERMOSTAT control knob to the coolest position
by rotating fully clockwise. If system has reverse
cycle, turn knob counter-clockwise for heat.
5) Check for a steady solid stream of seawater from the
overboard discharge.
6) Turn FAN SPEED control knob clockwise to highest
setting.
7) Verify that the fan is running and that there is steady
airflow out of the supply air grille.
8) Turn the SYSTEM SWITCH to RUN; this will start
the compressor. The indicator light on the control
will illuminate.
9) To set the thermostat, allow sufficient time for the unit
to cool/heat the area to the desired temperature.
When the area is sufficiently cooled/heated, turn the
thermostat knob slowly toward the center position
until it clicks once (the indicator light will turn off).
The thermostat is now set to maintain a constant
temperature. While heating, if the ambient
temperature is less than 50°F, set the FAN SPEED
control knob to low for five to ten minutes until the
unit begins to heat well, then increase the fan speed
for more heat output.
START
SYSTEM SWITCH
FAN SPEED
THERMOSTAT
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/MARINE/URSVSIEMS&
2.5" CUT OUT
-3.75" PANEL-
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The thermostat on the MCP control panel serves to cycle the compressor on and off and provide an
automatic changeover from cooling to heating (reverse cycle only) with a 3.5° differential. Rotating
the thermostat to the left after it has been set for cooling will cause the unit to heat. If you rotate the
thermostat to the right, the unit will cool. If the thermostat is left stationary after being set, the unit
will cycle from cooling to neutral, or heating to neutral depending on the requirement.
Note: Do not turn the unit off and immediately turn it back on. Wait at least 30 seconds.
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