Installation manual

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English
Zephyr Cooling Only Units - Operation
Operation
Manual Control Panel Operation:
2-knob (2KB), 5K unit; 3-knob (3KB), 10, 12, 16K
units, see figures 6 & 7.
1. Ensure seawater intake ball valve (seacock) is open.
2. Turn top (MODE) control knob to OFF.
3. Turn on A/C circuit breaker. If the seawater pump has its
own circuit breaker, turn that on too.
4. Turn top (MODE) control knob to FAN, this energizes the
fan. Turn THERMOSTAT control knob to the coolest
position by rotating it fully clockwise.
5. Turn middle (FAN) control knob to highest setting
(for 3KB switch only).
6. Verify that the fan is running and that there is steady
airflow out of the supply air grill.
7. Turn top (MODE) control knob to RUN (on 2KB switch)
and ON (for 3KB switch). This will start the compressor
and seawater pump.
8. Check for a steady solid stream of seawater from the
overboard discharge.
9. To set the THERMOSTAT, allow sufficient time for the unit
to cool the area to the desired temperature. When the
area is sufficiently cooled, turn the thermostat knob slowly
toward the center position until it clicks once. The thermo-
stat is now set to maintain a constant temperature.
Important
Do not turn the unit off and immediately turn it back on. Wait
at least 30 seconds for system refrigerant pressures to
balance.
Troubleshooting Guidelines
Before you call for service, review this list. It may save you
time and expense. This list contains common occurrences
that are not a result of defective workmanship or materials. If
you need service after trying these procedures, call your
nearest Cruisair dealer.
Problem: System will not start.
Possible Reason/Solution
1. Air conditioner circuit breaker is off. Turn circuit breaker
on at ship’s panel.
2 Wiring at terminal strip is miswired.Check wiring
diagram; correct if necessary.
3. Input line voltage is insufficient. Check power source
for proper voltage. Check wiring and terminals for proper
sizes and connections.
Problem: No cooling.
Possible Reason/Solution
1. Selector knob may not be in “cool” position. Reset
selector knob.
2. Temperature set point is above ambient temperature.
Lower temperature setting.
3. Obstructed water flow. Clean seawater strainer. Check
for good steady flow from overboard discharge.
4. Pump may be air locked. Remove hose from pump
discharge to purge air from line.
5. Coil iced. See below.
Problem: Coil iced.
Possible Reason/Solution
1. Thermostat set point is too low. Check setting on
temperature knob. If setting is extreme for conditions,
raise set point.
2. Improper air flow. Clean return air filter or remove
obstructions from return air stream. Check for crushed or
restricted ducting. Ducting run must be as straight as
possible, remove any excess ducting.
Problem: Short cycling compressor.
Possible Reason/Solution
1. Cold supply air returning directly to return air grill.
Redirect supply air so that it is not directed into the return
air stream.
Problem: System runs continuously.
Possible Reason/Solution
1. Port hole or hatch open. Close all port holes and
hatches.
2. Thermostat setting is excessive for conditions. Raise
thermostat setting to cycle compressor.