Air Filter
The air filter is located on the face of the indoor coil of the reverse cycle air conditioner. The indoor coil may be located behind a return air grille. The air filter should be checked monthly and cleaned, if necessary, with dishwasher soap and warm water.
Condensate Drains
The condensate drain(s) on the reverse cycle air conditioner should be checked every three months for obstructions. This can be accomplished by pouring a gallon of water into the condensate pan and observing that the water will drain down to its original level within one minute. If the unit has more than one drain outlet, it is important to verify that both drain outlets are working.
Water Strainer
The water strainer should be checked daily. Remove any debris that is collected in the strainer.
Water Pump
Systems that utilize the “rubber impeller” water pump should be inspected every 400 hours. The rubber impeller or water pump should be replaced if excessive wear is evident. Systems that utilize a centrifugal water pump should not require regular maintenance.
Water Connections
It is important to verify that all water connections are water tight and that the water flow from each unit’s overboard discharge is evident when the units are running to ensure proper drainage.
Refrigerant Charge
The refrigerant used in your self-contained Marvair® reverse cycle air conditioner is factory charged and sealed. The refrigerant charge should not require adjustment and should be adequate for the life of the air conditioning system. Split system units are charged in the field, and should not require additional refrigerant after the unit is installed.
Winterizing the System
There are two scenarios for winterizing the system – the boat remains in the water or the boat is out of the water, in dry dock storage. Please follow the procedures described below for your situation.
A. Boat remains in the water.
In water storage requires the use of a potable anti-freeze solution throughout the system’s water supply and discharge lines. Be sure to follow all state, local and federal ordinances before discharging an anti-freeze solution overboard.
Self-Contained & Split System Installation & Service Manual 9/09 Page 54 of 70
- Close ball valve.
- Disconnect water line at ball valve.
- Insert line into a bucket of potable anti-freeze.
- Run air conditioner until a solid stream of anti-freeze is being discharged overboard.
- Reconnect water line at ball valve.
Follow the procedures detailed in sections 3.1 and 3.2 when starting the Marvair® unit after winterizing the system.
B. With the boat out of the water (in dry dock):
- Open the seacock to permit all the water to drain out of system via the thru-hull fitting.
- Remove and empty the sea water strainer basin.
- Loosen the screws on the pump head to allow the water to drain from the pump and from the water line between the pump and strainer.
Prior to launching the boat in the spring, replace the screws on the pump head.
Follow the procedures detailed in sections 3.1 and 3.2 when starting the Marvair unit after winterizing the system.
Air Filter
The air filter is located on the face of the indoor coil of the reverse cycle air conditioner. The indoor coil may be located behind a return air grille. The air filter should be checked monthly and cleaned, if necessary, with dishwasher soap and warm water.
Condensate Drains
The condensate drain(s) on the reverse cycle air conditioner should be checked every three months for obstructions. This can be accomplished by pouring a gallon of water into the condensate pan and observing that the water will drain down to its original level within one minute. If the unit has more than one drain outlet, it is important to verify that both drain outlets are working.
Water Strainer
The water strainer should be checked daily. Remove any debris that is collected in the strainer.
Water Pump
Systems that utilize the “rubber impeller” water pump should be inspected every 400 hours. The rubber impeller or water pump should be replaced if excessive wear is evident. Systems that utilize a centrifugal water pump should not require regular maintenance.
Water Connections
It is important to verify that all water connections are water tight and that the water flow from each unit’s overboard discharge is evident when the units are running to ensure proper drainage.
Refrigerant Charge
The refrigerant used in your self-contained Marvair® reverse cycle air conditioner is factory charged and sealed. The refrigerant charge should not require adjustment and should be adequate for the life of the air conditioning system. Split system units are charged in the field, and should not require additional refrigerant after the unit is installed.
Winterizing the System
There are two scenarios for winterizing the system – the boat remains in the water or the boat is out of the water, in dry dock storage. Please follow the procedures described below for your situation.
A. Boat remains in the water.
In water storage requires the use of a potable anti-freeze solution throughout the system’s water supply and discharge lines. Be sure to follow all state, local and federal ordinances before discharging an anti-freeze solution overboard.
Self-Contained & Split System Installation & Service Manual 9/09 Page 54 of 70
- Close ball valve.
- Disconnect water line at ball valve.
- Insert line into a bucket of potable anti-freeze.
- Run air conditioner until a solid stream of anti-freeze is being discharged overboard.
- Reconnect water line at ball valve.
Follow the procedures detailed in sections 3.1 and 3.2 when starting the Marvair® unit after winterizing the system.
B. With the boat out of the water (in dry dock):
- Open the seacock to permit all the water to drain out of system via the thru-hull fitting.
- Remove and empty the sea water strainer basin.
- Loosen the screws on the pump head to allow the water to drain from the pump and from the water line between the pump and strainer.
Prior to launching the boat in the spring, replace the screws on the pump head.
Follow the procedures detailed in sections 3.1 and 3.2 when starting the Marvair unit after winterizing the system.
