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Cassette Air Handler

EmI’S HIgH EffICIENCy pROdUCT LINE

AIR HANdLERS

CONdENSERS

S1CA & S1HA Single Zone

Side Discharge

S2CA/S2HA Dual Zone

Side Discharge

T2CA/T2HA, T3CA/T3HA, T4CA/T4HA 2, 3 & 4 Zone

Top Discharge

WLCA/WLHA

High Wall Air Handlers

CACA/CAHA & CACB/CAHB

Cassette Air Handlers

UNCA/UNHA

Universal Air Handler

Содержание CAC_36

Страница 1: ...er International LLC 5780 Success Dr Rome NY 13440 www enviromaster com installation operation and maintenance MANUAL An ISO 9001 2000 Certified Company CAHB12 Model Shown Straight Cool Nominal Circui...

Страница 2: ......

Страница 3: ...ly to the unit The EMI AmericaSeries air handlers must be connected only to a properly grounded electrical supply Do not fail to properly ground this unit Turn off the electrical supply before servici...

Страница 4: ...ire resistant thermal and acoustic foam insulation and light grey high impact ABS fascia and an expanded polystyrene drain pan with a tough fire retardant thermoplastic liner Air Systems Fans are back...

Страница 5: ...returned to the box until it is ready to be installed Blanking off When branch ducting is to be used two polystyrene pieces for blanking off fascia openings are Included with the fascia packing Up to...

Страница 6: ...sitioned in the fascia discharge slots to direct the air to the ducts blanking off Pieces Cassette 12 Unit Shown The Cassette 36 units have three hinged grills and three filters Cassette 24 Unit Shown...

Страница 7: ...tioned at least 5 ft 1 5m from a wall or similar ob struction Position the unit as close to the center of the room as possible to insure air is distributed evenly 3 Position the unit so that the disch...

Страница 8: ...up ported separately from the Cassette The ceiling must not be supported by any part of the Cassette unit fascia or any associated wiring or pipe work A A B Cabinet A B Cassette 12 19 50 495mm 22 87 5...

Страница 9: ...t protrude more than 2 51mm below the mount ing bracket 4 Lift the Cassette onto the hanging rods Level at the correct distance from the ceiling with the aid of the installation guides as shown Figure...

Страница 10: ...of water draining back into the unit when it is switched off Note There is a check valve at the pump discharge to prevent water from draining back into the unit This piping technique will mini mize a...

Страница 11: ...The Cassette is equipped with a Flo Rater Piston Expansion device Connec tions are sweat type The suction line large must be insulated the entire length with closed cell foam tube insulation Do not in...

Страница 12: ...assis leav ing approximately 1 25mm to hang the fascia 4 On Cassette 24 and 36 units connect the vane motor plug by plugging it into the socket connection on the chassis a Ensure that the polarized co...

Страница 13: ...ularly in low voltage wiring The correct cable size must be used to ensure a voltage drop of less than 1 volt in the control wiring Once the refrigeration pipe work is complete the electrical supply c...

Страница 14: ...to remove 5 The rating plate is located on the outside of control box cover see Low Volt Inter connecting Wiring section for location of wiring diagram 6 Check the unit rating plate for circuit ampaci...

Страница 15: ...low volt interconnect wiring must be at least 18awg L1 L2 ground wire ground Lug 4 Then refer to the wiring diagram to connect the power wire to L1 and the other wire to L2 at the power connector loca...

Страница 16: ...the ends of tubing and insert into fittings 2 Protect the valves by wrapping with a wet rag heat sink before brazing 3 The use of a heat shield is recommend ed to protect the paint A heat shield can b...

Страница 17: ...z 2551g R 22 8 Charge to proper weight charge based on the length of interconnect see below Note Charging should be done with a dial a charge or weighed in with a scale Note CAH_ refers to CAHA or CAH...

Страница 18: ...B Verify that the DIP switch 4 Remote Thermostat Operation is OFF and 1 Test Mode is ON within the control box of the air handler Refer to Figure 6 All subsequent operations are accom plished with the...

Страница 19: ...er to Figure 6 See Sequence of Operation Re mote Thermostat Mode section of this document for details 4 Remote Thermostat Operation ON 3 Remote Thermostat Fan Speed Selection OFF Low Fan Speed ON High...

Страница 20: ...s into heating mode with the setpoint 1 F above room temperature or meeting the requirements for 1st stage heating operation Verify compressor start up noise vibration and overall system operation Nex...

Страница 21: ...ndoor Cassette unit and outdoor condenser Failure to do so can result in serious injury or electric shock A set of DIP switches is located on the main circuit board inside the control box These DIP sw...

Страница 22: ...3 and 2 Also the clean filter time will de fault to 1000 hrs Unit Mounted Key Pad Interface The Cassette User Interface uses Light Emitting Diodes LED s to display the operational modes of the unit F...

Страница 23: ...n or off When held for two seconds transmits all settings to the main controller MODE Used to select mode of operation Heat Cool Auto Change Over Dry and Fan Modes LOUVER Used to turn the motorized lo...

Страница 24: ...ller Figure 9 make sure it is directed toward the Cas sette s Infrared Receiver window The Cassette will respond with a beep indicat ing that it has successfully received the transmitted information T...

Страница 25: ...e ON If El heat OFF If no El Ht 3 Heat pump This setting is skipped if Heat source setting is Off as it s not needed 03 H P ON Heat pump available OFF Not available OFF 4 Auto changeover differential...

Страница 26: ...h three 3 operational fan modes High Low and Auto The FAN button will allow the selection of the desired fan set ting in all modes except Dry Mode In Dry Mode the fan will operate constantly at low sp...

Страница 27: ...perature The setpoint temperature will change by one 1 degree with each successive press of the UP or DOWN ARROW buttons Hold ing the button down will change the tem perature rapidly Place the setpoin...

Страница 28: ...time has elapsed the compres sor will switch off The fan will operate as described in Fan Operation Next place the setpoint temperature above the room temperature by at least two 2 degrees The compres...

Страница 29: ...ing operation as described under Cooling Mode If the setpoint temperature is above the room temperature by the auto change over differential amount selected in the Configu ration Mode the unit will ru...

Страница 30: ...re Pro gram Run Mode adjust the temperature using the UP or DOWN ARROW buttons The override setting will remain in effect until the next scheduled event Morning Day Evening Night At that time the set...

Страница 31: ...the indoor unit is not equipped with electric heat a single stage heat pump thermostat is adequate EMI outdoor heat pump units utilize a re versing valve that is energized in Cooling Mode Make sure th...

Страница 32: ...d fan motors will start and heating will begin Depending on the ther mostat selected electric heat will also en ergize when the deviation between room temperature and setpoint temperature is high enou...

Страница 33: ...he water in the pan reach a critical level the monitor will automatically signal the main control unit The controls micro processor will switch off the condensing unit for a minimum of three 3 minutes...

Страница 34: ...Alarm LED will flash three 3 times to signify that a fault has occurred The compressor will switch off for a minimum of three 3 minutes AND until the fault condition is corrected Also if the microproc...

Страница 35: ...rformance Data Date Model Number Technician Serial Number Mode Cooling Indoor Section Notes Air handlers Entering Air DB Air handlers Entering Air WB Air handlers Leaving Air DB Air handlers Leaving A...

Страница 36: ...the filter by sliding under re tainer clips 5 Or use a garden hose Remove the grille and filter and hose off Let filter s and grille s dry before replacing Turn the power off to the unit before servic...

Страница 37: ...e have the full model and serial number available prior to calling WARNING Wall Thermostat Control Interconnect diagram Models CAHA12 CAHA24 and CACA36 EMI America Series air handlers are de signed to...

Страница 38: ...t terminals R and C at the indoor unit there should be a reading of 24 Vac Low Volt controls The Cassette air handler outdoor unit and optional wall mounted thermostat are connected using low volt 24...

Страница 39: ...and wall thermostat Refer to low volt interconnect diagram Figures 12 or 13 for remote thermostat connection The wall mounted thermostat will switch on and off the outdoor unit through the black Y an...

Страница 40: ...OTH THE INDOOR CASSETTE AND OUTDOOR UNIT After disconnecting all power to the unit Wall Thermostat Control Models CAHA and CACA Continued Troubleshooting procedure Continued disconnect the wires from...

Страница 41: ...on some thermostats The Infrared Hand Held Controller or wall mounted thermostat will switch on and off the outdoor unit through the yellow Y low volt terminal When the thermostat is call ing for coo...

Страница 42: ...minal Y1 will be removed The condensate pump should be checked for obstruction The condensate pump assembly can be removed through the side access panel After removal inspect the drain pan to determin...

Страница 43: ...Speed CFM Low Speed CFM 12 380 180 L S 335 158 L S 24 700 330 L S 620 293 L S 36 1 300 614 L S 1 160 548 L S Cassette TECHNICAL DATA REFRIGERATION 12 24 36 Refrigerant Type R22 CONNECTIONS 12 24 36 S...

Страница 44: ...e 12 9 000 12 000 Btuh cassette dimensions Feature Qty size A Optional Discharge Knockout 3 5 B Fresh Air Inlet Knockout 2 1 x 2 C Condensate Discharge 1 D Suction 1 E Liquid 1 F Condensate Pump Acces...

Страница 45: ...Fresh Air Inlet Knockout 3 3 x 3 C Condensate Discharge 1 D Suction 1 E Liquid 1 F Condensate Pump Access 1 Note All dimensions in inches Cassette 24 Control Box B F E D C 6 87 4 37 3 97 4 93 30 41 1...

Страница 46: ...rge cabinet Cassette 36 30 000 36 000 Btuh cassette dimensions Note All dimensions in inches Cassette 36 B Control Box F D E C 6 87 4 37 4 00 5 00 5 47 4 68 42 66 29 19 43 45 1 63 TYP Feature Qty size...

Страница 47: ...000 8 000 13 0 7 7 0 80 11 6 3 3 R22 CAH_12 S1HA2000 11 800 10 800 13 0 7 7 0 72 11 4 3 4 R22 CAH_24 S1HA8000 18 000 15 000 13 0 7 7 0 78 12 0 3 3 R22 CAH_24 S1HA4000 23 000 20 000 13 0 7 7 0 69 11 7...

Страница 48: ...2 CAH_12 2 S2CA2200 23 000 13 0 0 74 11 4 R22 CAH_12 2 S2CA9200 20 400 13 0 0 77 11 4 R22 SYSTEM OPTIONS WITH S2HA SIDE DISCHARGE Cassette Qty Condenser Cooling Btuh Heating Btuh SEER SHR EER COP Ref...

Страница 49: ...0 0 71 12 4 3 1 R22 CAH_24 2 T2HA4400 48 000 40 000 13 0 0 67 12 0 3 1 R22 CAH_12 CAH_24 1 1 T2HA9800 27 200 21 200 13 0 0 76 12 2 3 1 R22 CAH_12 CAH_24 1 1 T2HA2400 35 000 30 000 13 0 0 69 11 8 3 1...

Страница 50: ...800 13 0 0 72 11 9 3 1 R22 CAH_12 3 T3HA9220 31 800 27 800 13 0 0 76 11 6 3 1 R22 CAH_12 CAH_24 2 1 T3HA9280 38 500 31 000 13 0 0 75 12 1 3 1 R22 CAH_12 CAH_24 2 1 T3HA9240 44 500 37 800 13 0 0 71 11...

Страница 51: ...oduct Line Air handlers Condensers S1CA S1HA Single Zone Side Discharge S2CA S2HA Dual Zone Side Discharge T2CA T2HA T3CA T3HA T4CA T4HA 2 3 4 Zone Top Discharge WLCA WLHA High Wall Air handlers CACA...

Страница 52: ...5780 Success Drive Rome NY 13440 Enviromaster International LLC www enviromaster com...

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