Amana VCA Service Instructions Manual
  1. Manuals
  2. Brands
  3. Amana Manuals
  4. Air Conditioner
  5. VCA
  6. Service instructions manual

Amana VCA Service Instructions Manual

Remote coolers & remote heat pumps blowers, coils, & accessories
Hide thumbs Also See for VCA:
Table of Contents

Advertisement

Quick Links

See also: Service Manual
Service
Instructions
VCA, RCA, RCB, RCC, & RCE Model Remote Coolers
RHA, RHD, RHE & RHF Model Remote Heat Pumps
Blowers, Coils, & Accessories
This manual is to be used by qualified HVAC
technicians only. Amana does not assume any
responsibility for property damage or personal
injury for improper service procedures done by
an unqualified person.
Heating
&Air Conditioning
Comfort. Quality. Trust.
®
Model and Manufacturing
numbers listed on pages 4 & 5
RS6200003 Rev 1
July 2001

Advertisement

Table of Contents
loading

Related Manuals for Amana VCA

Summary of Contents for Amana VCA

  • Page 1 4 & 5 Service Instructions VCA, RCA, RCB, RCC, & RCE Model Remote Coolers RHA, RHD, RHE & RHF Model Remote Heat Pumps Blowers, Coils, & Accessories This manual is to be used by qualified HVAC technicians only.

  • Page 2: Table Of Contents

    INDEX PRODUCT IDENTIFICATION ................4-6 PRODUCT DESIGN ....................7-8 SYSTEM OPERATION ..................9-12 ACCESSORIES Cooling ......................13-14 Heat Pump ....................15 Blowers and Coils ..................16-17 SCHEDULED MAINTENANCE ................18 SERVICING ......................18-49 ACCESSORIES WIRING DIAGRAMS ..............50-52 WIRING SCHEMATICS ..................53-57 IMPORTANT INFORMATION Pride and workmanship go into every product to provide our customers with quality products.
  • Page 3 IMPORTANT INFORMATION WARNING CAUTION To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact: WARNING System contaminants, improper Service Procedure and/or physical abuse affecting hermetic compressor electrical terminals may cause dangerous system venting.

  • Page 4: Product Identification

    Similar to RCB line except for Grey sheet metal, unpainted coil, less compressor crankcase heater, and pressure switches. P1221301C-P1221303C P1221314C-P1221318C VCA**B2* Vortex Cooling (B) 10 Seer outdoor units. Designed for the new construction P1221320C-P1221326C market. Similar to RCB**B*A line except for Grey sheet metal, unpainted coil, less compressor crankcase heater, and pressure switches.
  • Page 5 PRODUCT IDENTIFICATION This section will identify the models that are covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Blower Cooling Air handler. One piece air handler with TXV Coil, PSC motor. Not BCA**TA002A P1177201C-P1177207C for heat pump applications...
  • Page 6 EDK__A P1234901C - P1234905C Electric Heat "D" Series Kit. Auxiliary electric heat for BMA air handlers Coil Case Kit ("D" design series). Accessory coil case allows installer to add a case to Amana CCD__A_ P1203914C - P1203916C Uncased up flow/down flow coils, "C"...
  • Page 7 ACCESSORIES Model Number RCA/B18A2A RCA/B24A2A RCA/B30A2A RCA/B36A2A RCA/B42A2A RCA/B48A2A RCA/B60A2A RCA/B36A3A RCA/B48A3A RCA/B60A3A RCA/B36A3A RCA/B48A4A RCA/B60A4A RCB18A2B RCB24A2B RCB30A2C RCB30A2B RCB36A2B RCB42A2B RCB48A2B RCB60A2B RCB36A3B RCB48A3B RCB36A4B RCB60A3B RCB48A4B RCB60A4B RCB18B2* RCB24B2* RCB30B2* RCB36B2* RCB42B2* RCB48B2* RCB60B2* RCC18A2A RCC24A2A RCC30A2A RCC36A2A RCC42A2A RCC48A2A...
  • Page 8 ACCESSORIES Model Number RCC36A3A RCC48A3A RCC60A3A RCC18A2B/D RCC24A2B/D RCC30A2B/D RCC36A2B/D RCC42A2B/D RCC48A2B/D RCC60A2B/D RCC36A3B/D RCC48A3B/D RCC60A3B/D RCE24A2* RCE30A2* RCE36A2* RCE42A2* RCE48A2* RCE60A2* VCA18B2* VCA24B2* VCA30B2* VCA36B2* VCA42B2* VCA48B2* VCA60B2* VCA36B3* VCA48B3* VCA60B3* VCB18A2A VCB24A2A VCB30A2A VCB36A2A VCB42A2A VCB48A2A VCB60A2A Available for this model Factory installed Not used in this application or not available 8 Rev 1...
  • Page 9 ACCESSORIES Model Number x x x x x x RHA18A2A x x x x x x RHA24A2A x x x x x x RHA30A2A x x x x x x RHA36A2A x x x x x x RHA42A2A x x x x x x x x x RHA48A2A x x x...
  • Page 10 ACCESSORIES Model Number RHD18 RHD24 RHD30 RHD36 CCH24FCC RHD42 CCH30FCC RHD48 CCH36FCC RHD60 CCH48FCC RHE18 CCH60FCC RHE24 CCH24FCD RHE30 CCH30FCD RHE36 CCH36FCD RHE42 CCH48FCD RHE48 CCH60FCD RHE60 CHH24TCC RHF24 CHH30TCC RHF30 CHH36TCC RHF36 CHH48TCC RHF42 CHH60TCC RHF48 CHH24TCD CHH30TCD CHH36TCD CHH48TCD CHH60TCD Not used in this application or not available...
  • Page 11 ACCESSORIES Model Number Model Number BMA24F00A BMA30F00A BMA36F00A BMA42F00A BMA24F05A CHA18T-C BMA30F10A CHA24T-C BMA36F10A CHA30T-C BMA42F10A CHA36T-C X X X CHA42T-C CHA48T-C CHA54T-C CHA57T-C CHA60T-C CCA18F-C CCA24F-C X X X CCA30F-C CCA36F-C X X X CCA42F-C CCA48F-C CCA54F-C CCA57F-C CCA60F-C CHF24T-C BBA24A2A CHF30T-C...

  • Page 12: Product Design

    , 4-, and 5-ton models are also available for 230V and 460V applications. The RCA, RCB, RCC, VCA, and VCB Remote Condensing Units are made in 1.5 through 5 ton sizes. RCE models are available in 2 through 5 ton sizes. They are designed for 208- 240 volt single phase applications.
  • Page 13 All units are constructed with R-4.2 insulation. In areas of extreme humidity (greater than 80% consistently), the Amana CCA and CHA "A" coils are designed for upflow and installer should insulate the exterior of the blower with counterflow operation. The CCH and CHH slab coils, and insulation having a vapor barrier equivalent to ductwork the CCF and CHF cased "A"...

  • Page 14: System Operation

    SYSTEM OPERATION COOLING CYCLE Reversing Valve (Energized) Indoor Outdoor Coil Coil Accumulator Thermostatic Expansion Valve Bi-Flow Filter Dryer Check Valve HEATING CYCLE Reversing Valve (De-Energized) Indoor Outdoor Coil Coil Accumulator Thermostatic Expansion Valve Bi-Flow Filter Dryer Check Valve 14 Rev 1...

  • Page 15: Cooling

    SYSTEM OPERATION COOLING The check valve at the indoor coil will open by the flow of refrigerant letting the now condensed liquid refrigerant by- The refrigerant used in the system is R-22. It is a clear, pass the indoor expansion device. The check valve at the colorless, non-toxic, non-irritating, and non-explosive liquid.
  • Page 16 SYSTEM OPERATION If electric heaters are utilized, a two stage heating and single Two conditions must exist for the electric heat to be acti- stage cooling thermostat should be used. vated: Should the second stage heating contacts in the room 1.
  • Page 17 SYSTEM OPERATION BBC Electric Heat-Only Operations BMA Air Handler Sequence of Operation As in the cooling-only operations, with the thermostat in the FAN—AUTO position and a “W2” or “E” call, the first bank BMA Cooling-Only Operations of electric heat is energized as the blower ramps up to speed The cooling operation is straight forward.

  • Page 18: Scheduled Maintenance

    2. Clean the casing of the outdoor unit inside and out. In many instances the owner may be able to perform some 3. Motors used on Amana products are considered to be of the maintenance, however, the advantage of a service permanently lubricated and do not require lubrication.

  • Page 19: Trouble Shooting

    TROUBLE SHOOTING System Unsatisfactory Complaint No Cooling Operating Cooling Pressures POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" Power Failure Test Voltage Blown Fuse Impact Fuse Size & Type Loose Connection Inspect Connection - Tighten x x x x x x Shorted or Broken Wires Test Circuits With Ohmmeter Open Overload...
  • Page 20 Servicing Section Index CHECKING VOLTAGE ............................. 21 CHECKING WIRING ............................22 CHECKING THERMOSTAT, WIRING, AND ANTICIPATOR ................22 CHECKING TRANSFORMER AND CONTROL CIRCUIT ................22 CHECKING CYCLE PROTECTOR ........................23 CHECKING TIME DELAY RELAY ........................23 CHECKING CONTACTOR AND/OR RELAYS ....................23 CHECKING CONTACTOR CONTACTS ......................

  • Page 21: Servicing

    SERVICING Three phase units require a balanced 3 phase power sup- S-1 CHECKING VOLTAGE ply to operate. If the percentage of voltage imbalance ex- ceeds 3% the unit must not be operated until the voltage WARNING condition is corrected. % Voltage Max.

  • Page 22: S-2 Checking Wiring

    SERVICING S-2 CHECKING WIRING Resistance Heaters 1. Set room thermostat to a higher setting than room temperature so both stages call for heat. WARNING 2. With voltmeter, check for 24 volts at each heater relay. 3. No voltage, indicates the trouble is in the thermostat or 1.

  • Page 23: S-5 Checking Cycle Protector

    SERVICING S-6 CHECKING TIME DELAY RELAY WARNING Time delay relays are used in some of the blower cabinets to improve efficiency by delaying the blower off time. Time delays are also used in electric heaters to sequence in mul- 1. Remove control panel cover or etc. to gain access to tiple electric heaters.

  • Page 24: S-8 Checking Contactor Contacts

    SERVICING S-8 CHECKING CONTACTOR CONTACTS WARNING OHMMETER 1. Disconnect the wire leads from the terminal (T) side of the contactor. 2. With power ON, energize the contactor. S-12 CHECKING HIGH PRESSURE CONTROL WARNING (some models) The high pressure control capillary senses the pressure in 3.

  • Page 25: S-13 Checking Low Pressure Control

    SERVICING S-13 CHECKING LOW PRESSURE CONTROL S-15 CHECKING CAPACITOR (some models) CAPACITOR, RUN The low pressure control senses the pressure in the suction A run capacitor is wired across the auxiliary and main wind- line and will open its contacts on a drop in pressure. The ings of a single phase permanent split capacitor motor.
  • Page 26 SERVICING RELAY, START 2. Set an ohmmeter on its highest ohm scale and connect the leads to the capacitor - A potential or voltage type relay is used to take the start A. Good Condition - indicator swings to zero and slowly capacitor out of the circuit once the motor comes up to speed.

  • Page 27: S-16 Checking Fan And Blower Motor Windings

    SERVICING S-17 CHECKING COMPRESSOR WINDINGS WARNING WARNING 1. Allow device to cool to the surrounding ambient tem- perature, at least 15 minutes. Device can be very hot if recently energized. 2. Disconnect leads from PTCR device. Using an ohmme- ter, test across terminals as shown in the following illus- tration.
  • Page 28 SERVICING Fuse, circuit breaker, ground fault protective device, etc. has not tripped - WARNING HI-POT 1. Remove the leads from the compressor terminals. WARNING 3. If a ground is indicated, then carefully remove the 2. Using an ohmmeter, test continuity between terminals compressor terminal protective cover and inspect for S-R, C-R, and C-S, on single phase units or terminals loose leads or insulation breaks in the lead wires.

  • Page 29: S-18 Testing Crankcase Heater

    SERVICING COPELAND COMPRESSOR · 123456 Motor Shift Year Month Serial No TECUMSEH COMPRESSOR 123456 Month Day Year Serial No WARNING BRISTOL COMPRESSOR 123456 3. Energize the relay by applying 24 volts to the relay coil. 4. With power on, retest with ohmmeter, readings should be opposite that read in step 2, (N.O.

  • Page 30: S-22 Reversing Valve Replacement

    SERVICING S-22 REVERSING VALVE REPLACEMENT The defrost timer board will keep the defrost (DFR) relay energized until the outdoor coil temperature reaches ap- proximately 60°F at the 30/60 control, or a maximum of 10 WARNING minutes compressor run time. If the defrost cycle is terminated by temperature, then a new time interval count cannot begin until the defrost (30/60) Capture the refrigerant charge from the system.
  • Page 31 The defrost mode will be temporally suspended if the thermostat cycles off, or a pressure switch opens. Upon closure of pressure switches or resumption of thermostat AMANA P/N 11164401 demand, defrost activity will resume, as soon as the 5 minute short cycle time is satisfied.
  • Page 32 SERVICING - After 3 pressure switch The board counts the compressor run time in the heating openings within a single heating or cooling cycle, all func- mode after the 30/60 control closes. If the 30/60 control tions will be locked out. Lockout is reset by cycling off the opens, the timer will reset.

  • Page 33: S-24 Testing Defrost Timer Board

    TST terminals on board. (Test Terminals minutes. Jumpered - Count time speeds up - 90 minutes = Amana part number 10865001 defrost controls, used through approximately 21 seconds). 9412 production. After the initial 30 minute frost build interval 5.
  • Page 34 SERVICING INTEGRATED DEFROST CONTROL (RHA-B2*, RHE**A*B/D & RHF** mdls) 1. The board will ignore the jumper if left in the test position for more than 5 minutes. It will go back to normal timing, 1. The following checks may be made with a VOM. Mea- using a 90 minute defrost interval.

  • Page 35: S-40 Bba/Bbc Control Board Operation

    SERVICING The BBA control board contains a relay that is operated based on inputs from the room thermostat and thermistor. Amana P/N 10865002 The relay and therefore the blower is controlled per the Paragon P/N B1416-55 following table. Micro Input Control Board Action "G"...

  • Page 36: S-41 Bbc Interface Board Operation

    SERVICING LED SIGNAL Temp Thermistor Temp Thermistor MODE Res. Ω Res. Ω °F °F ON TIME OFF TIME 79600 29610 Normal Operation 1/2 second 1/2 second 54720 26130 Thermistor and/or 41800 23100 2 Flashes 3 seconds Board Error 36660 20470 33640 14970 Thermistor Error...

  • Page 37: S-42 Bma Control Board Operation

    SERVICING S-42 BMA CONTROL BOARD OPERATION S-60 ELECTRIC HEATER The BMA**F**A model air handlers have a solid state control (OPTIONAL ITEM) board which monitors safety circuits, controls fan operation Optional electric heaters may be added, in the quantities and heating functions. The BMA control board contains shown in the specifications section to provide electric resis- relays that is operated based on inputs from the room tance heating.

  • Page 38: S-61 Checking Heater Fuse Link

    CHECKING HEATER LIMIT CONTROL(S) and mounting bracket. It can be installed on the control boxes of all Amana remote heat pumps to prevent the Each individual heater element is protected with a limit operation on the electric heaters when the ambient tem- control device connected in series with each element to perature is above the control set point.

  • Page 39: S-64 Lac__A, Low Ambient Control

    Low Ambient Control, these units will be suitable for operation at S-65 PCK__A, PRESSURE CONTROL KIT & The LAC01A kit is for use with any Amana RCB, RCC, or ASC__A, ANTI SHORT CYCLE KIT RCE three phase remote cooling unit which is installed with (OPTIONAL ITEM) an indoor coil that includes a thermal expansion valve.

  • Page 40: S-100 Refrigeration Repair Practice

    S-66 FFK02A & FFK03A, FOSSIL FUEL KITS heat - 1200°F. (OPTIONAL ITEM) The fossil fuel kit controls are designed for use with Amana S-101 LEAK TESTING remote Heat Pumps in conjunction with oil, electric or gas furnaces. FFK02A's are for use with RHA/RHDA2B models.

  • Page 41: S-102 Evacuation

    SERVICING For a system that contains a refrigerant charge and is 2. If the service dill valves are to be used for evacuation, it suspected of having a leak, stop the operation and hold the is recommended that a core remover be used to lift the exploring tube of the detector as close to the tube as core for greater efficiency.

  • Page 42: S-103 Charging

    SERVICING S-103 CHARGING 6. Check system for leaks. Charge the system with the exact amount of refrigerant. Refer to the specification section or check the unit name- plates for the correct refrigerant charge. An inaccurately charged system will cause future prob- When charging a remote condensing unit with a non- lems.

  • Page 43: S-104 Checking Compressor Efficiency

    The 3 phase Scroll Compressors are direction of rotation indoor coil sensitive. They will rotate in either direction depending on THE VALVES PROVIDED BY AMANA ARE DESIGNED the phasing of the power. There is no negative impact on TO MEET THE SPECIFICATION REQUIREMENTS FOR durability caused by operating 3 phase compressors in OPTIMUM PRODUCT OPERATION.

  • Page 44: S-107 Underfeeding

    374.1 84.70 384.3 SUPERHEAT ADJUSTMENT 88.10 392.3 91.5 401.3 The expansion valves used on Amana coils are factory set 411.3 and are not field adjustable. If the superheat setting be- 95.1 421.8 comes disturbed, replace the valve. 98.8 433.3 44 Rev 1...

  • Page 45: S-109 Checking Subcooling

    SERVICING S-109 CHECKING SUBCOOLING They are designed to control the rate of liquid refrigerant flow into an evaporator coil. Refrigerant liquid is considered subcooled when its tem- The amount of refrigerant that flows through the capillary perature is lower than the saturation temperature corre- tube/restrictor orifice is regulated by the pressure difference sponding to its pressure.

  • Page 46: S-113 Checking Restricted Liquid Line

    There are other causes for high head pressure which may be found in the "Service Problem Analysis Guide." Suction Line Drier Clean-Up Method Use AMANA part number R0157057 Suction Line Drier If other causes check out normal, an overcharge or a system Clean-Up Kit (41 cubic inches).

  • Page 47: S-120 Refrigerant Piping

    The outdoor unit's refrigerant holding charge is for must be adequate and is trapping the contaminants and the matched indoor coil plus 25 feet (15 feet for VCA/B units) it is permissible to leave it in the system; however, the of liquid line.
  • Page 48 SERVICING The previous table is based on a maximum liquid line pressure drop of 25 psi. Any portions of the liquid line which will pass through a high ambient area must be insulated to EFFECTIVE prevent loss of subcooling. LENGTH 5.
  • Page 49 SERVICING Known Factors: 2’ 1. RCC48A2A and CCA48TUA coil. Evaporator above Condenser. 20’ 2. Liquid Line 65 linear feet w/ 8 short radius elbows, and 30 ft. vertical lift. 3. Suction Line 65 linear feet w/ 8 long radius elbows. Determine Suction and Liquid Line sizes: Procedures: A.
  • Page 50 SERVICING Known Factors: 2’ 1. RCC36A2A and matching "A" coil. Condenser above Evaporator. 2’ 2. Liquid Line 72 linear feet w/ 9 long radius elbows. 3. Suction Line 72 linear feet, and 43 ft. vertical lift. 5’ Determine Suction and Liquid Line sizes: Procedures: A.

  • Page 51: S-200 Duct Static Pressures And/Or Static Pressure Drop Across Coil

    SERVICING If external static pressure is being measured on a furnace to determine airflow, supply static must be taken between the ACCUMULATOR MAX. ADDED "A" coil and the furnace. UNIT SIZE PART NUMBER REFRIGERANT 18 - 30 11190801 120 oz. 11190803 150 oz.

  • Page 52: Accessories Wiring Diagrams

    Must automatically bypass compressor heat (W1/Y1) when in the emergency heat mode. f. Emergency heat mode must not continuously energize the “E” terminal when in emergency heat mode. Amana Thermostat THSADC1H2BA shown. The following Amana thermostats also meet the above requirements: THSMDC1H2BA THSMEC1H2BA THPADC1H3BA...
  • Page 53 ACCESSORIES WIRING DIAGRAMS 53 Rev 1...
  • Page 54 ACCESSORIES WIRING DIAGRAMS NOTE: Use N/O circuit in OD Stat Outdoor Stat DUAL FUEL RELAY Thermostat RELAY Outdoor Unit 1 2 R W G C Y R W G C Y Furnace NOTE: Jumper 1 & 2 for supply air tempering during defrost cycle ONLY Outdoor Stat...
  • Page 55 SCHEMATICS FFK02A FOSSIL FUEL KIT THERMOSTAT 2, 5 HEAT AUTO COOL AUTO OUTDOOR UNIT Thermostat shown for reference only. See the thermostat DFR1 installation instructions for additional information. DFR2 DEFROST CONTROL 14, 15 19, 34 DFR3 30/60 FURNACE LIMIT FURNACE BLOWER MOTOR DOOR INTERLOCK...

  • Page 56: Start Cap

    SCHEMATICS OUTDOOR UNIT THERMOSTAT HEAT AUTO COOL AUTO Thermostat shown for reference only. See the thermostat installation instructions for additional information. JUMPER NOTE: Jumper 1 & 2 for supply air temp- ering during de- frost cycle ONLY. FURNACE LIMIT FURNACE BLOWER MOTOR DOOR INTERLOCK...

  • Page 57: Heat

    SCHEMATICS OUTDOOR UNIT DFR1 ROOM THERMOSTAT DFR2 ATK05 DEFROST CONTROL 3, 4, HEAT DFR3 7, 34 AUTO COOL 30/60 AUTO GY-42 Thermostat shown for reference 12, 25 only. See the thermostat installation instructions for additional information. 18, 23 If ATK is to control 2nd stage electric heat, remove GY-42 from wire nut on blower.

  • Page 58: Gonr

    SCHEMATICS OUTDOOR UNIT DFR1 ROOM THERMOSTAT DFR2 ATK05 DEFROST CONTROL 3, 4, HEAT DFR3 7, 34 AUTO COOL 30/60 AUTO GY-42 Thermostat shown for reference 12, 25 only. See the thermostat installation instructions for additional information. 18, 23 BLOWER MOTOR BLOWER COIL 240-60-1 Hard Start components not used on all models.

  • Page 59: Start Relay

    SCHEMATICS OUTDOOR UNIT DFR1 ROOM THERMOSTAT DFR2 ATK05 DEFROST HEAT CONTROL AUTO DFR3 3, 33 COOL 30/60 AUTO Thermostat shown for reference only. See the thermostat installation instructions for additional information. BLOWER MOTOR BLOWER COIL 240-60-1 Hard Start components not used on all models. START RELAY OUTDOOR UNIT START CAP...
  • Page 60 SCHEMATICS OUTDOOR UNIT THERMOSTAT HEAT AUTO COOL AUTO 24, 25, 26 Thermostat shown for reference only. See the thermostat THERMISTOR installation instructions for additional information. UNUSED TABLE SELECT FUSE BLOWER COIL 240-60-1 Hard Start components not used on all models. START RELAY OUTDOOR UNIT START CAP...
  • Page 61 SCHEMATICS OUTDOOR UNIT THERMOSTAT HEAT AUTO COOL AUTO 24, 25, 26 Thermostat shown for reference only. See the thermostat THERMISTOR installation instructions for additional information. UNUSED 12 PIN CONNECTOR FUSE UNUSED UNUSED IDLE BLOWER COIL IDLE 240-60-1 Hard Start components not used on all models. START RELAY OUTDOOR UNIT START CAP...
  • Page 62 SCHEMATICS OUTDOOR UNIT THERMOSTAT HEAT AUTO COOL AUTO PSC MOTOR JUMPER Thermostat shown for reference only. See the thermostat installation instructions for additional information. FAN COM FUSE FAN SPD BLOWER MOTOR BLOWER COIL Fan Relay 240-60-1 Hard Start components not used on all models. START RELAY OUTDOOR UNIT START CAP...

This manual is also suitable for:

RccRceRhaRhdRheRhf ... Show all

Table of Contents