Operating instructions

Operating Instructions

The Cabin Comfort MCP has three basic controls:

• System Switch

• Fan Speed Switch

• Thermostat

Follow these procedures for operation of the system:

1. Set the MCP System switch to “OFF”.

2. Set the circuit breaker on the ship’s main control panel to “ON”.

3. Turn the Thermostat fully clockwise for cooling and fully counter-clockwise for heating.

4. Set the fan speed control on “HIGH” position (fully clockwise).

5. Be certain the seawater inlet valve is open.

6. Turn the System switch to “START”. This energizes the fans and the seawater pump.

Check the overboard discharge to be sure that water is flowing from the overboard thru-

hull outlet.

7. Turn the system switch knob to “RUN”. The compressor will start to cool or heat

according to the setting of the thermostat.

8. To set the thermostat, allow sufficient time for the unit to operate to heat or cool the area

to the desired temperature. When the area is sufficiently heated or cooled, turn the

thermostat know slowly to the center position until it ‘clicks’ once. The thermostat is

now set to maintain a constant temperature.

9. On the cooling cycle, use any fan speed desired. When operating in the heat cycle, set the

fan speed control to the “HIGH” position. Decrease the fan to medium setting and run

the system in this position for the most efficient heat output.

Note: If ambient temperatures are less than 50°F (10°C), allow the unit to run on low for 5

to 10 minutes, until it begins to heat well.

Keep in mind, however, that the lower the fan speed, the less capacity the system has.

10. To turn the system off, turn the System switch on the control panel to “OFF”.

The thermostat on the MCP control panel serves to cycle the compressor on and off and provide

an automatic changeover from cooling to heating with a 3.5°F (1.9°C) 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.