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Heating

Two Stage Heating

Heat pump units accommodate two-stage heating when

optional electric heater is present in combination with heat

pump condenser.

First stage consists of heat pump alone and second stage

consists of heat pump and electric heat both operating

simultaneously.

To verify heating operation, place Amp meter on indoor

incoming power line.

Set mode at heating, with thermostat set 1° above

current room temperature.

• Compressor will start and deliver heat to conditioned

space, Amp meter registers fraction of Amp (blower

motor only).

Set thermostat 2° above current room temperature.

Compressor continues to operate, delivering heat to

conditioned space, electric heat will energize.

• Amp meter now reads 7 to 13 Amps at 230 volts

AC dependent upon electric heater capacity and line

voltage supplied to air handler.

electric Heat Applications

Electric heat units utilize control relay located on circuit

board in control box.

• Control calls for electric heat relay energizes

Auto-reset limit switch located on heater end plate

or on heater assembly interrupts power to heater if

overheat condition occurs.

• Electric heat assembly is equipped with one-time fuse

link. When electric heat temperatures rise above auto

resetting limit switch, non-resetting, one-time fusible

link opens heater remains “OFF”.

• To restart, new fuse link is required. Do not replace

fusible link with simple wire conductor.

• Following current values apply when unit is connected

to 230v power supply.

• values include fan motor current. If supply voltage is

different, amperage changes.

3kw = 13.5 Amps

1.5kw= 6.9 Amps

Indoor unit contains electronic anti-short-cycle timer

feature (ASCT) which prevents outdoor condenser from

short cycling.

After control is satisfied there is a three (3) minute delay

before condenser is allowed to restart.

Wired wall control is calling for cooling and ASCT delay

has elapsed, 24 vac can be measured between terminals:

electric Heat (Optional)

Units with electric heat use control relay located on circuit

board in control box. Thermostat is calling for electric

heat relay energizes.

Check for electric heat operation, place wall thermostat

in Heat mode with setpoint temperature above room

temperature.

Place clamp-on type ammeter on one leg of incoming

power supply.

Amp reading should correspond with values found in

#3 below, when unit is working correctly.

The following current values apply when the unit is

connected to a 230 vac power supply. These values

include fan motor current. If the supply voltage is

different, this will affect the amp draw of the heater.
3kw = 13.5 Amps

1.5kw= 6.9 Amps

verify electric heat relay by placing voltmeter across

high-voltage relay output terminal and incoming

power L2 terminal.

Reading is same as measured across incoming power

supply if unit is working correctly.

TRoUBLESHooTInG - CAHV UnITS

Auto-reset limit switch is located on heater assembly.

Limit interrupts power to heater if over-temperature

condition occurs.

Limit switch is equipped with one-time fuse link.

Should electric heat temperatures rise above auto

resetting limit switch, non-resetting, one-time fuse link

opens and heater remains off.

Limit switch assembly must be replaced if fuse link

opens.

Содержание EMI Ductless CAHV Series

Страница 1: ...om CAHV Variable Speed Cassette Ductless Split System Air Handlers Straight Cool Heat Pump Nominal Capacities CAHV09 CAHV12 CAHV18 CAHV24 CAHV30 CAHV36 Units 9 000 12 000 18 000 24 000 30 000 35 600 Btuh COOL 2 6 3 5 5 3 7 0 8 8 10 4 kW 8400 8800 17000 19000 29000 29000 Btuh HEAT 2 5 2 6 5 0 5 6 8 5 8 5 kW Installation Operation and Maintenance Manual ...

Страница 2: ... Installation Considerations 8 Mounting The Unit 9 Condensate Piping 12 Duct Connections 13 Refrigerant Piping 14 Refrigerant Processing 15 Final Assembly 17 Electrical Wiring 19 Optional Wired Wall Controller 21 Optional Cahv Wired Wall Controller Operation 22 Initial Start Up Cahv Units 24 Cahv Controller Overview 28 Wired Wall Controller Configuration 31 Setting The Controller 33 Hand Held Cont...

Страница 3: ...assistance during or after installation contact your local representative Visit our web site www enviromaster com for local representative listing For further assistance call 1 800 325 5479 When calling for assistance please have following information ready Model Number_________________________ Serial Number_________________________ Date of installation______________________ Shipping damage MUST b...

Страница 4: ... Indicates a hazardous situation which if not avoided could result in death or serious injury CAUTION Indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE Indicates information which should be followed to ensure proper installation and operation WARNING Fire explosion and electrical shock hazard Improper assembly and or installation could result in d...

Страница 5: ...p electric heat relay Condensate pump with 36 0 9 m lift measured from base of unit 24V Transformer System Options Wired wall control Electric Heat 230V 1 5 kW models 9 12 3 kW model 18 24 5 kW model 30 36 Electric Heat Option EMI heat option heat pumps are intended to operate with indoor air handler with electric heat If indoor air handler without electric heat is matched with heat pump condenser...

Страница 6: ...e 7 Model 9 12 Model 18 24 Features 1 Optional discharge knockouts 5 inch diameter 3 available 2 Fresh air inlet knockouts 1 x 2 inches 9 12 2 available 3x3 18 24 3 Condensate discharge inch diameter 4 Suction connection 5 Liquid connection 6 Condensate pump access panel Model 30 36 ...

Страница 7: ...26 8 90 226 J ref 2 67 68 3 38 86 3 38 86 K 25 86 657 35 61 904 47 78 1214 L 12 76 324 18 69 475 24 73 628 M 1 73 44 1 97 50 1 97 50 N ref 2 16 55 2 72 69 2 72 69 O 5 12 130 5 12 130 5 12 130 P ref 11 34 288 12 05 306 14 01 356 R typical 1 50 38 1 63 41 1 63 41 R1 19 50 495 29 19 741 29 19 741 R2 23 27 591 31 20 792 42 66 1084 R3 22 47 571 30 41 772 43 45 1104 S 7 19 183 6 87 174 6 87 174 T 3 73 9...

Страница 8: ...ping may be roughed in before wallboard or panels are placed in new construction PVC pipe 3 or 4 I D may be used as pipe chase Unpacking Cassette fascia and main chassis are packaged together for increased protection NOTICE Do not throw template away with packaging 1 Remove banding straps and lift cardboard lid 2 Fascia is packed in bubble wrap on top of chassis Fascia is not attached to chassis f...

Страница 9: ... blanked off If fascia discharge slot needs blanking off 1 Remove inlet grilles and filters See Figure 4 and Figure 2 Page 9 2 Turn fascia over to expose polystyrene insulation See Figure 3 3 Push one polystyrene blanking off pieces into recess in polystyrene fascia insulation Mounting the unit Figure 2 Model 18 24 Two Hinged Grilles And Two Filters hinge Figure 3 Applying Blanking Off Pieces blan...

Страница 10: ...e optional wired wall mounted thermostat to insure good temperature control Select installation position 1 Position thermostat approximately 5 ft 1 5m above floor level 2 Avoid external walls and drafts from windows and doors 3 Avoid positioning near shelves and curtains as these restrict air movement 4 Avoid heat sources direct sunlight heaters dimmer switches etc 5 Seal wiring holes in wall behi...

Страница 11: ...Mounting the unit Figure 8 Positioning Installation Guides Inner Case Insulation Cassette Case Figure 9 Threaded Rods Must Not Protrude More Than 2 Inches Below Mounting Brackets MAXIMUM 2 51mm Mounting 1 Use template to cut ceiling opening and determine rod positions See Figure 6 Page 10 2 Install hanger bolts using 3 8 10 mm all thread rod at centers See Figure 6 Page 10 3 Prepare installation g...

Страница 12: ... should check valve become stuck open from airborne debris 4 Slope condensate pipe work downward from highest point in direction of water flow with minimum gradient of 1 per 10 8mm 1m No uphill gradients other than in first 18 0 45m of pipe work from cassette 5 When multiple cassettes are connected to common condensate drain insure drain is large enough to handle total volume of condensate 6 Drain...

Страница 13: ...ts are a 1 x 2 32 x 64mm rectangular models 9 12 b 3 76mm square models 18 thru 36 3 Cut black insulation around knock out See Figure 13 4 Snip tabs holding knock out in place 5 Remove metal knock out and black insulation behind it 6 Attach field supplied duct collars to chassis using self drilling screws 7 Repeat above steps for remaining duct work Figure 12 Knockouts fresh air knockout Branch Du...

Страница 14: ...ding or unit and avoid contact with sharp edges Wrap refrigeration valves with wet rag heat sink to protect valves while brazing See Figure 31 Page 20 Refrigerant Piping 1 Clean tubing ends Insert into fittings See Figure 15 2 Protect valves by wrapping with wet rag heat sink before brazing See Figure 16 3 Use shield to protect paint Shield may be made from scrap metal See Figure 14 4 Braze tubing...

Страница 15: ...ssures and temperatures at different outdoor conditions Sub cool should be used for final system charge Charging should be suitable charge weighed in with scale NOTICE It is illegal to discharge refrigerant into the atmosphere Use proper reclaiming methods equipment when installing or servicing this unit Measure all heat pump saturated suction pressures at the Common Suction Port not vapor Service...

Страница 16: ...23 g m 39 5oz 1120g S1HV2000 CAHV12 25 oz ft 23 g m 39 5oz 1120g S1HV8000 CAHV18 64 oz ft 59 g m 54 0oz 1531g S1HV4000 CAHV24 64 oz ft 59 g m 54 0oz 1531g S1HV3000 CAHV30 64 oz ft 59 g m 90 0oz 2551g S1HV6000 CAHV36 64 oz ft 59 g m 90 0oz 2551g Refrigerant Processing Use following example to find charge adjustment and system charge for any air handles and tubing length Line Adjustment Line Charge ...

Страница 17: ...cket connection on chassis a Insure polarized connector 2 position is in proper orientation and connected b Route wires to prevent them from becoming trapped cut broken or chaffed 5 Cassette models CAHV contain second cable connection to control box for infrared unit mount control 6 Insure polarized 10 position connector is in proper orientation and connected 7 Route wires to prevent them from bec...

Страница 18: ... Female vane motor plug on chassis Male Vane Motor Plug On Fascia Figure 26 Connect Infrared Unit Cable Figure 27 Secure Fascia To Chassis Figure 28 Adjust Louver Position 30 From Plumb Final Assembly Do not over tighten bolts could damage fascia and drain pan ...

Страница 19: ...an 1 volt in control wiring 5 When refrigeration pipe work is complete electrical supply can be connected 6 Low voltage wiring must be at least 18 awg Connect Wiring 1 Loosen four screws on front of control box cover Slide cover up and off to access high voltage wiring See Figure 29 2 Rating plate is located on outside of control box cover 3 Each unit must have separate branch circuit protected by...

Страница 20: ...e 32 Unit Mounted Controls Heat Pump Connection Two Stage Heating Cooling Only Cooling only units utilize 4 low volt interconnecting wires between indoor and outdoor units Each wire COM1 COM2 SC and 24 VDC connects to the same named indoor and outdoor terminal See Figure 31 Protect unused wires or terminals such as both RV by wire nut from making contact with junction box or other metal surfaces H...

Страница 21: ...ough fan button for wired controller Operation High Med Low Cooling Operation Wired wall controls call for cooling operation On or Off Place system switch in Cool mode after connecting controller to unit Adjust set point temperature below room temperature Compressor and fan motors start and cooling begins Place set point temperature above room temperature Outdoor condenser stops Fan will operates ...

Страница 22: ... Wall mounted control layout see Figure 34 and Figure 35 Low voltage interconnect wiring must be at least 18 AWG 24V control transformer is located in air handler unit Provides low volt control power to both air handler and condenser Depending on models selected interconnect control wiring may be effected OPTIONAL CAHV wired Wall controller operation ...

Страница 23: ...ating including heat pump condenser and optional indoor electric heat See Figure 43 pg 33 Wired Wall controls call for electric heat operation On or Off and compressor heat pump heating Place system in Heat mode after configuring wired wall control Adjust set point temperature above room temperature Compressor and fan motors start and heating begins Electric heat also energizes when deviation betw...

Страница 24: ...electrical connections 2 Separate any lines that contact each other 3 Replace control panel cover filters and grilles 4 Test each power and circuit connection before powering system Perform Electrical Circuit Checks 1 Turn cassette unit ON Verify fan cycles correctly 2 Models CAHV 18 24 only Check motorized vane operation 3 Units with electric heat check operation of heating elements by setting sy...

Страница 25: ...mes too high Check Cooling Operation Cooling only systems Turn system power on and turn down system setpoint to activate compressor Check Heat Pump Operation 1 Heat pump systems Turn system setpoint up to activate heat pump compressor operation 2 Place system controls into heating mode with setpoint 1 F above room temperature or meeting requirements for 1st stage heating operation Verify compresso...

Страница 26: ...to enable auto changeover between heat cool Set Controller Configuration 1 Review information in Figure 38 Page 29 through Figure 42 Page 32 for general operation of handheld remote or optional wired wall control 2 See Figure 39 Page 30 for information on setting up control using handheld infrared remote Remote is a line of sight device and must be pointed at receiver on unit mounted display 3 Tur...

Страница 27: ...ir Verify Heat Pump Operation With Electric Heat Option 1 This is heat pump outdoor unit with optional electric heat source in cassette indoor unit 2 Set configuration for Heat Source ON Heat Pump ON See Figure 42 Page 32 3 Use remote to set MODE to Cool See Figure 39 Page 30 4 Use remote to adjust setpoint temperature below room temperature 5 Verify compressor is operating Observe three 3 minute ...

Страница 28: ...nel CAHV Controller Overview WARNING Electrical shock hazard Verify all power is off from both indoor cassette unit and outdoor condenser unit before removing control box cover Failure to follow these instructions could result in death or serious injury ...

Страница 29: ...mode Cooling LED On when unit is in cooling operation Heating LED On during calls for heat 5 Timer Alarm LED On steady while unit is in Sleep Timer mode flashes to indicate fault codes 6 Clear Filter Warning Button Hold for 3 seconds to clear Clean Filter warning indicated when Timer Alarm LED item 5 flashes 4 times CAHV Controller Overview Figure 38 Unit Mounted Receiver Chassis Mounted Display 3...

Страница 30: ...ng FAN Press to toggle between fan modes High Med Low or Auto PROGRAM Normal operation Press to toggle between manual operation and Pre programmed 7 day run mode Configuration Set Time or Programming mode press to enter next selection TIMER Press to toggle Timer mode on off TEST While in Heating or Cooling mode press 5 seconds to enter test mode Intended for service only Holds unit at a fixed spee...

Страница 31: ...ous item selection RIGHT ARROW Press for next item selection FAN Press to toggle between fan modes High Med Low or Auto PROGRAM Normal operation Press to toggle between manual operation and Pre programmed 7 day run mode Configuration Set Time or Programming mode TIMER Press to toggle Timer mode on off FAST While in Heating or Cooling press for 5 seconds enters Turbo mode for 30 minutes MODE PROGRA...

Страница 32: ... 7 Page 34 to record settings Day of week Mon Tue Wed Thu Fri Sat Sun Louver is closed when fan is off Period of day Morning Day Evening Night Periods provide four time settings to initiate change in cooling heating setpoints Allow adjustments for setback such as night setback daytime setback and occupied settings for residential applications Set hour minute for each time as well as cooling and he...

Страница 33: ...INUS dead band Example setpoint 68 F dead band is 3 F cooling is on with room temperature at or above 71 F heating is on with room temperature at or below 65 F Check Filter Time 05 F Lt 2 5 7 10 12 250 Hours 500 Hours 750 Hours 1000 Hours 1250 Hours 10 Set time for automatic notice of time to change filter At end of time period control displays FILTER CHECK warning Warning also appears if four eva...

Страница 34: ...o Morning Cool Heat Auto Time Temp Time Temp Time Temp Time Temp Time Temp Time Temp Time Temp Monday Tuesday Wednes day Thursday Friday Saturday Sunday To copy the settings from any day to the entire week 1 Select the day to be copied 2 Simultaneously press the Fan and Prog buttons for three seconds Setting the Controller ...

Страница 35: ...hibernate mode and display goes dark if there is no activity on remote for ten minutes Pressing any button awakens remote while in hibernate mode Remote returns to mode it was in prior to entering hibernate mode Power Pressing POWER button momentarily switches unit either on or off 1 OFF mode LCD displays time of day and day of week 2 ON mode LCD displays room temperature mode of operation Cooling...

Страница 36: ...ut Electric Heat Heat Pump Unit Outdoors EMI heat pumps are intended to operate with indoor air handler with optional electric heat If indoor air handler without electric heat is matched with heat pump condenser system will deliver cold air during defrost Heat pump operation without electric heat control must first be configured properly See Heat Source ON Table 6 pg 37 Heat Pump OFF Figure 42 pg ...

Страница 37: ...int temperature are same compressor operates in cooling and electric heat energizes Hand Held Controller Operation Should room temperature fall below setpoint temperature by 2 degrees compressor stops and heating continues to boost room temperature back up to setpoint temperature If room temperature rises above setpoint temperature by 2 degrees heating stops and cooling continues to bring room tem...

Страница 38: ...grammed into control through 7 Day Programming mode 1 Pre Programmed Run mode is entered from Cooling mode Heating mode or Auto mode only 2 Pre Programmed Run mode cannot be entered from Dry or Fan modes 3 Pressing PROGRAM button momentarily enters or exits Pre Programmed Run mode 4 The word PROGRAM appears in LCD display 5 The setpoint changes to programmed setting at selected time To use Pre Pro...

Страница 39: ...all controller operation fan speed selection can be made through Fan Button See Figure 39 Page 30 Fan Button cycles through High Medium Low Auto Wired wall controller call for fan operation On or Off After thermostat has been satisfied and call for heating or cooling has been removed indoor fan remains on for additional 60 seconds increasing efficiency by pulling unit s remaining energy Cooling Op...

Страница 40: ...om cycling off prematurely Minimum on time for compressor and electric heat is two 2 minutes Drain Pan Sensor Drain pan sensor monitors condensate level in drain pan Should water reach critical level monitor signals main control unit Microprocessor switches off condensing unit until fault condition has been cleared to prevent further condensate production Fault code flashes on controller s LED and...

Страница 41: ...denser coil temperature too high or low Check system air flow and sensor On 11 Suction temperature too high or low Check system air flow and module On 12 Outdoors ambient temperature too high or low Check outdoor ambient temperature sensor On 13 Discharge temperature fault too high or low Failure for sensor or circuit detection On 15 Communication failure indoor or outdoor Check wires connectors t...

Страница 42: ...cuum any accessible unit parts See Figure 45 d Or use garden hose Wash grille and filter with hose Let filters and grilles dry before replacing WARNING DO NOT operate unit without filter and front grille in place e Replace filters clips and front grille before operating unit Replace filters by sliding under retainer clips f Wipe with damp cloth when needed See Figure 46 Maintenance WARNING Electri...

Страница 43: ...connect wiring See Figure 30 Page 19 or Figure 31 Page 20 Transformer provides low voltage power source for controls Interconnect wire should be at least 18 awg See unit wiring diagram for interconnect diagram that matches your system Power Supply Check Check rating plate for proper field voltage and breaker size Use voltmeter to check incoming power supply Verify power supply agrees with rating p...

Страница 44: ...nits Interconnect cored is required between indoor unit and wired wall control Refer to low voltage interconnect diagram See Figure 30 Page 19 Low Voltage Controls Cooling Only Units Cooling only units utilize 4 low volt interconnecting wires between indoor and outdoor Air handlers using unit mounted controls require contacts wired to same name indoor and outdoor COM1 COM2 SC and 24VDC COM1 and CO...

Страница 45: ...rrent If supply voltage is different amperage changes 3kw 13 5 Amps 1 5kw 6 9 Amps Indoor unit contains electronic anti short cycle timer feature ASCT which prevents outdoor condenser from short cycling After control is satisfied there is a three 3 minute delay before condenser is allowed to restart Wired wall control is calling for cooling and ASCT delay has elapsed 24 Vac can be measured between...

Страница 46: ...ower to unit disconnect wires from fuse link 2 With an ohmmeter check continuity across fuse link 3 If fuse link is open it must be replaced Two Stage Heating Two stage heating combines heat pump and electric heat operation Heat pump units require 18 AWG low voltage interconnecting wire between indoor unit and condenser Heat Pump Units Model Cahv Heat pump units require 18 AWG minimum low voltage ...

Страница 47: ... removed properly from unit after removal condensate pump Inspect all drain lines to insure there is no blockage preventing condensate removal Q How long will fan run A While unit is in cooling or heating and auto fan mode is selected fan cycles with call for cooling or heating Room temperature reaches setpoint temperature heat cool call is dropped fan stays on for additional 60 seconds to purge u...

Страница 48: ...iquid 3 8 3 8 Condensate Drain I D I D I D Branch Duct 5 Ø 5 Ø 5 Ø Fresh Air Duct 1 x 2 3 x 3 3 x 3 FILTRATION Model 9 12 18 24 30 36 Type Washable Mesh Quantity 1 2 3 Efficiency 80 CONDENSATE PUMP Model 9 12 18 24 30 36 Maximum Head 36 0 9 m Min Flow Rate 2 5 GPH 9 5 l h Must bush down to 5 8 interconnect for 18K and 24K systems Measured from bottom of unit Table 11 Discharge Air Volume Dry Coil ...

Страница 49: ... 5 R410A S1CV6000 CAHV36 35 600 14 25 0 74 9 9 R410A Table 13 Heat Pump Systems Cahv Condenser Cassette Cooling Btuh Heating Btuh SEER HSPF SHR EER COP Ref S1HV9000 CAHV09 9 000 8 400 15 0 7 7 0 79 13 0 3 0 R410A S1HV2000 CAHV12 12 000 8 800 15 8 7 7 0 69 12 0 3 0 R410A S1HV8000 CAHV18 18 000 17 000 17 0 9 0 0 74 13 0 3 1 R410A S1HV4000 CAHV24 24 000 19 000 17 0 9 0 0 66 11 0 3 0 R410A S1HV3000 CA...

Страница 50: ...ng Air DB Cassette Entering Air WB Cassette Leaving Air DB Cassette Leaving Air WB Outdoor Section Entering Air Leaving Air Temperature Split Operating Pressures Compressor Suction PSIG Compressor Discharge PSIG Power Input Compressor Volts Compressor Amps OD Fan Motor Volts OD Fan Motor Amps ID Fan Motor Volts ID Fan Motor Amps Total Volts Total Amps Temperatures Degrees F Compressor Suction Comp...

Страница 51: ...51 Notes ...

Страница 52: ...Phone 1 800 228 9364 Fax 1 800 232 9364 2201 Dwyer Avenue Utica NY 13501 ...

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