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Mermaid MARINE AIR CONDITIONER, Installation And Operation Manual

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MERMAID MARINE AIR 

CONDITIONING   

 
 

 

 
 

INSTALLATION 

& 

OPERATIONS GUIDE 

 

 
 
 
 

Mermaid Manufacturing of Southwest Florida, Inc. 

2651 Park Windsor Drive, Suite 203 

Fort Myers, FL 33901 

(239) 418-0535  (800) 330-3553 

Fax (239) 418-0538 

E-mail: 

[email protected]

 

Web site: 

http://www.mmair.com

 

 

Summary of Contents for MARINE AIR CONDITIONER

Page 1: ...G INSTALLATION OPERATIONS GUIDE Mermaid Manufacturing of Southwest Florida Inc 2651 Park Windsor Drive Suite 203 Fort Myers FL 33901 239 418 0535 800 330 3553 Fax 239 418 0538 E mail MMair Mindspring com Web site http www mmair com ...

Page 2: ...lation SECTION 5 MAINTENANCE and WINTERIZATION A Maintenance B Winterization SECTION 6 THEORY of OPERATION and TROUBLE SHOOTING A Theory of Operation B Trouble Shooting FIGURES 1 Typical Ducting and Venting Scheme 2 Operational Block Diagram 3 Typical Cooling Water Installation 4a Wiring Diagram Cool Only Models 4b Wiring Diagram Electric Heat and Cool Models 4c Wiring Diagram Reverse Cycle Heat a...

Page 3: ...mponents and are available across the entire country and around the world Any four wire 24Volt digital thermostat will operate any standard Mermaid air conditioner Don t forget to see our NEW flush mount digital controller on our website www mmair com Our standard electrical control box does not contain any printed circuit boards or solder All electrical connections are snap on color coded wires m...

Page 4: ... in cabinets or in outside dry lazzeretts and sail lockers The selected spot must accommodate the following eight requirements Everything must fit in and or be accessible to the selected spot a The physical size of the unit and electrical box b Water in and out hoses c Electrical power cable for the unit and pump connections d Air ducting and air splitters e Mounting of the return air grill to ins...

Page 5: ... conditioner base plate a mounting shelf or platform must be built Typically the shelf will be made from 3 4 inch marine grade plywood which can be either fiberglassed or mechanically attached to the boat s sole or superstructure Never screw directly into the hull When attaching the unit to the sole of the boat the superstructure or a fabricated mounting shelf always make absolutely positive that ...

Page 6: ...nerally in power boats the sea cock will be installed in the engine compartment In sail boats because of their more uniform draft characteristics it is usually installed under a settee seat or some other compartment more convenient to the air conditioner Water is then routed to the air conditioner from the pump via 5 8 inch marine water hose also known as I D hose where it is connected to the air ...

Page 7: ...nents will fit in the spot selected and remain below sea level and the boat is totally out of the water you are ready to cut the sea cock mounting hole SEE WARNING ABOVE IMPORTANT BEFORE CUTTING YOUR SEA COCK MOUNTING HOLE CHECK THE OUTSIDE HULL IN THE AREA YOU WILL BE CUTTING TO MAKE SURE THAT THERE ARE NO RIBS OR OTHER HULL VARIATIONS WHICH WILL NOT ALLOW THE SEA COCK FOOT SCOOP TO MOUNT FLAT AG...

Page 8: ...nd secure it to the hull with 2 1 4 inch flat head s s screws We recommend that the screw holes be predrilled with the appropriate size drill bit to eliminate cracking of the outer gelcoat of the hull When drilling the holes take care not to drill through the hull Use a hand held screwdriver to eliminate stripping the hole out These screws are intended only to keep the foot scoop from turning unde...

Page 9: ...maid strainer locate the strainer mounting bracket This is the bracket with a large hole in it Unscrew the plastic bowl from the strainer body and place the strainer body in the hole Replace the plastic bowl on the strainer body to lock the strainer in the bracket This is meant to be a loose fit to facilitate cleaning when the strainer is dirty Water will flow from the sea cock through the straine...

Page 10: ... OR SINKING OF THE BOAT DAMAGE TO THE AIR CONDITIONER FROM EXCESSIVE AND RECURRENT LEAKING DUE TO FAILURE TO DOUBLE CLAMP ALL CONNECTIONS WILL VOID THE WARRANTY The 5 8 inch blue stripe water hose or black reinforced hose deluxe kits and the pump power cord may now be routed to the air conditioner compartment If the power cord that is permanently attached to the pump is not long enough to be route...

Page 11: ...ote If you are using a single pump to supply cooling water to two air conditioners you must install a Pump Relay Box Before running pump power cable please see Section 3 entitled Pump Relay Box Water Out The water out thru hull can be mounted any place on the boat s hull that is a minimum of 6 inches above the water line If using a Mermaid supplied thru hull fitting the required hole size is 1 1 1...

Page 12: ...ample excess before cutting to allow for positioning of the unit s electric box at time of final hook up Connection of this cable to the air conditioner electrical box will be covered later At the circuit breaker panel locate a blank hole and install a 20 amp circuit breaker of the same style as those breakers currently in the panel Note that all of the breakers are connected together on one side ...

Page 13: ...various intervals along the duct routing to distribute air to multiple cabins Wye s are always preferable to Tee s We do not use Tee s for air splitters Refer to FIGURE 1 for a typical ducting scheme When surveying the boat for your air conditioner mounting spot you must also decide what size supply air grills will be used and where they will be mounted The size of the grill will dictate the size ...

Page 14: ... cooling of the boat and the performance of the air system as supply air is going into the cabin Air conditioning is just that conditioning of the air in a closed environment by continually pulling it back into the air conditioning unit removing heat and moisture and sending it back into the room or cabin It is important that the same volume of air being forced into the cabin is allowed to return ...

Page 15: ...in a 24 hour period This water collects in the condensation pan to be drained out Most boat owners will drain this water into the bilge for removal overboard by the existing bilge pumps When running your condensation hose remember that condensation flows only by gravity and the hose must never rise up any where along the way or condensation will backup into the pan and overflow This will not sink ...

Page 16: ...t 5 To connect your gray thermostat wire to the thermostat AND the black electrical box follow these procedures A On both ends of the gray wire cut away the gray insulation being careful not to cut into the RED GREEN WHITE AND BLACK wires B Intall the four fork terminals provided by stripping back of each of the colored wires and crimping the terminals to the wires Ensure with your crimp that you ...

Page 17: ... flat metal bracket with a hole drilled in one end of the S This is the hold down bracket for the fourth mounting screw This bracket will slip over the side of the evaporator condensation pan and the fourth mounting screw will be used to secure it Because this bracket can be placed anywhere on the pan you have a good deal of latitude in tight situations for installing the screw The air conditioner...

Page 18: ...m the Circuit Breaker Panel 12 gauge cable and connect this cable to the electric box WHITE terminal block by inserting the wires into the connector slots marked POWER To do this follow the same procedure as with the pump connections SEE ABOVE WARNING ON EXPOSED BARE WIRE CONNECTIONS Locate the BLACK terminal strip on the outside of the electrical box just above the power terminal block and attach...

Page 19: ...ump with no air bubbles in the strainer or hose the pump is primed However if air bubbles are present you must loosen the hose clamps on the pump discharge hose blue stripe or black reinforced and momentarily remove the hose Water will immediately flow from the pump breaking the air lock Quickly replace the hose and retighten the hose clamps The pump is now primed If you have installed the optiona...

Page 20: ...is open and cooling air is present If air flow is not present check ducting for good air tight connections and that kinking or sagging of the duct has not occurred b Water Connections Check each water connection beginning at the sea cock then the water strainer pump the air conditioner and the water out thru hull No water leaks should be present Also at this time it is always good to check the hos...

Page 21: ...asy to read Available 12 or 24 hour clock refer to included manual Here is another copy of the items listed on page 15 and 16 regarding mounting the thermostat Should you not need this section again proceed to section B for SETTING THE CURRENT DAY AND TIME The thermostat comes with a 20 foot power cable One end of the cable attaches to the BLACK terminal board on the side of the air conditioner el...

Page 22: ...he RED GREEN WHITE AND BLACK wires G Intall the four fork terminals provided by stripping back of each of the colored wires and crimping the terminals to the wires Ensure with your crimp that you have a solid grasp of the wire not insulation H The four fork terminal connection will be connected to the black terminal block on the upper side of the black electrical box for the air conditioning unit ...

Page 23: ...tomatically runs the system s fan during heating and cooling modes Setting the FAN switch to ON runs your system s fan continuously even without heating or cooling D PROGRAMMING THE THERMOSTAT You can change any of the preset times and or temperatures to suit your schedules for the weekday and weekend programs Each day is divided into four periods Morning Day Evening and Night Each period is progr...

Page 24: ...nit 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 second unit allowing normal operation to continue The second air unit will maintain control of the pump until it reaches temperat...

Page 25: ...h of these cables has an internal WHITE and BLACK wire Route one of these GRAY cables to each of the air units It is not important which cable goes to which air unit Again separate instructions are provided when the Mermaid FX 1 Thermostats are used 5 At the air conditioning unit on the outside of the air conditioner Electrical Box there is a BLACK terminal board Connect the BLACK wire in the GRAY...

Page 26: ...sure that none have become loose It is always a good policy to make periodic checks of all water connections and to close the water in sea cock whenever you leave the boat for extended periods of time b Your water strainer will require cleaning on a regular basis The time between cleanings will be dependent on the condition of the water your boat resides in the amount of time your air unit operate...

Page 27: ...and cooling water out must be clear of any standing or trapped water The best way to clear this coil is to remove the water in hose from the coil and place a short piece of the same diameter hose on the condensing coil Blow through the short hose until no water comes out of the water out thru hull fitting on the outside of the boat A compressed air source would be ideal should you have access to o...

Page 28: ...ted with good faith attempts to recapture and recycle or safely dispose of any such substances shall not be subject to the prohibition set forth in the proceeding sentence Class I substances include CFC 12 Class II substances include HCFC 22 All Mermaid air conditioners have always been charged with HCFC 22 R22 similar to your home air conditioner or refrigerator CFC 12 R12 has never been used in ...

Page 29: ...side the electrical box including a 115 220 vac to 24 vac reduction transformer The thermostat utilizes the 24 volts to activate the appropriate relays inside the electrical box which when energized apply 115 or 220 vac power to the blower compressor and water pump Through a time delay device inside the electrical box the power is provided to the pump and blower immediately followed by the power t...

Page 30: ...rent port causing it in effect to flow in the opposite direction This will cause the evaporator to heat up as described in paragraph 2 above Mermaid s FX 1 Controls utilize a 110v or 220v reversing valve coil that is or will be provided with the use of this control 4 Cooling Water a Cooling water enters the boat through the foot scoop under the boat up into the boat through the sea cock into the r...

Page 31: ...d get a reading by placing one voltmeter lead on the RED wire and the other lead on any other remaining lead along the black terminal board WHITE BLACK OR GREEN h If 24 vac is present and all of the above checks and procedures are positive most likely the thermostat is faulty or a wire has loosened inside the electrical box To check the thermostat take a 5 or 6 inch piece of insulated wire strip t...

Page 32: ...ation check raw water strainer for clogging and hoses for kinks Fix water problem and turn thermostat back on b If water pump is operational and HIGH PRESSURE switch has not activated perform thermostat jumper test described in paragraph 1h above If unit operates replace thermostat batteries and or thermostat 3 Compressor Runs Fan Does Not a Place thermostat in the OFF position Use a shorting wire...

Page 33: ... not giving true cabin temperature Examples would be in a sunny spot near glass or near the hatch Relocate thermostat f Low freon due to leak Unit will require professional service 6 Condensation Pan Overflows a Drain pan nipple on pan clogged Clean nipple b Drain hose clogged misaligned or kinked Fix and or clear hose c Air conditioner not properly elevated to drain water to drain pan nipple Chec...

Page 34: ...electrical box remove all 115 220 vac power from boat See above WARNINGS regarding 115 220 vac power b If wiring is deemed good problem will either be a faulty thermal safety fuse or a faulty heater coil Usually the thermal fuse is the problem To replace either item remove the metal cover from around the evaporator by removing two screws on each side and two bracket screws on the top of the evapor...

Page 35: ...RIEF DESCRIPTION OF YOUR PROBLEM ON THE UNIT THIS IS NECESSARY BECAUSE FROM TIME TO TIME SHIPPING DAMAGES MAY PRECLUDE US FROM IDENTIFYING THE UNIT FROM MARKINGS ON THE OUTSIDE OF THE BOX YOU HAVE TWO CHOICES AFTER PACKAGING THE UNIT IDENTIFYING IT AND SEALING THE BOX UP AS YOU UNDERSTAND FROM THE WARRANTY IT IS YOUR RESPONSIBILITY TO PAY FOR FREIGHT TO GET THE UNIT BACK TO THE FACTORY IF THE UNIT...

Page 36: ...SPONSIBLE FOR DAMAGE TO A UNIT IN TRANSIT WE WILL EVALUATE THE UNIT AND PROVIDE A REPAIR ESTIMATE FOR YOU UPON YOUR APPROVAL WE WILL REFURBISH THE UNIT TO AT LEAST ORIGINAL FACTORY SPECIFICATIONS FROM TIME TO TIME WE CHANGE VENDORS PARTS ETC TO CONTINUOSLY IMPROVE THE RELIABILITY OF OUR PRODUCT WHEN YOUR UNIT IS RETURNED COSMETIC ASPECTS OF YOUR UNIT MAY BE DIFFERENT BUT WE GUARANTEE THAT IT MEETS...

Page 37: ...Mermaid Manufacturing of Southwest Florida Inc 2651 Park Windsor Drive Suite 203 Fort Myers FL 33901 239 418 0535 800 330 3553 Fax 239 418 0538 info mmair com www mmair com ...

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