Mermaid Air Conditioner - Manual (Page 24)

VACATION TEMPERATURE HOLD:
Press HOLD. Adjust temperature as desired with UP/DOWN. Temperature setting will
not change even after next program period begins. To clear, press HOLD again.
SECTION 4
(PUMP RELAY BOX)
For use on ALL Mermaid units regardless of Thermostats
(110/220 Volt PUMP RELAY BOX)
A. INTRODUCTION:
1. When two (or more) air conditioners are to be cooled using a single water pump a
relay switching box must be used to interface the air conditioners to the pump. Only one
air conditioner can be allowed to apply power to the pump at any give time to preclude a
doubling of power on the pump. The relay switching box will recognize the first air unit
providing power to the pump. Whenever the pump is running both units will receive
water even if the second (or more) unit is not in operation. When the additional air
unit(s) becomes operational the relay switching box will isolate this unit from the pump
so double power is not applied; However, if the first air unit reaches temperature and
shuts down, the relay switching box will automatically turn control of the pump operation
over to the additional unit(s) allowing normal operation to continue. The additional air
unit(s) will maintain control of the pump until it reaches temperature and cycles off even
if the first unit cycles back on while the additional unit is operating.
2. A separate 5 amp circuit breaker will be required to be installed in the Main Circuit
Breaker Panel to provide power to the Pump Relay Box.
3. On the outside of the Pump Relay Box are two (or more) terminal blocks. One is
marked PUMP and POWER. This is where the incoming voltage from the breaker panel
and the outgoing power to the pump will be connected. The other terminal block(s) are
marked B W B W. This is where the control voltage coming in from each air conditioner
will be connected.
B. INSTALLATION:
1. Before proceeding further put the air conditioner(s) circuit breakers in their "OFF"
positions and disconnect all AC power from the boat.
WARNING
FAILURE TO DISABLE ALL AC POWER TO THE BOAT COULD RESULT IN
ELECTRICAL SHOCK CAUSING SERIOUS INJURY OR DEATH.
WARNING