Airxcel Marvair Classic HVPA24HP Maintenance Service Manual
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Airxcel Marvair Classic HVPA24HP Maintenance Service Manual

Airxcel Marvair Classic HVPA24HP Maintenance Service Manual

Hvpa & hvpsa heat pumps
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Classic HVPA & HVPSA
MAINTENANCE &
SERVICE
Models
HVPA24-30-36-42-49-60 &
HVPSA36-42-49-60
CAUTION!!
Read all instructions before use.
Retain this manual for future
reference. This equipment should
be installed and serviced only by a
trained professional HVAC service
person.
D u e t o c o n t i n u o u s p r o d u c t
improvement, use only the current
issue of this manual. The latest
version can be downloaded from the
Marvair website - www.marvair.com.
E-mail: marvairtech@airxcel.com • Internet: www.marvair.com
Heat Pumps
Manufactured By:
Marvair
Division of AIRXCEL
®
P.O. Box 400 • Cordele, Georgia 31010
156 Seedling Drive • Cordele, Georgia 31015
(229) 273-3636 • Fax (229) 273-5154
, Inc.
®
Classic HVPA & HVPSA M&S 8.09-1

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Summary of Contents for Airxcel Marvair Classic HVPA24HP

  • Page 1 Manufactured By: Marvair Division of AIRXCEL , Inc. ® ® P.O. Box 400 • Cordele, Georgia 31010 156 Seedling Drive • Cordele, Georgia 31015 (229) 273-3636 • Fax (229) 273-5154 E-mail: marvairtech@airxcel.com • Internet: www.marvair.com Classic HVPA & HVPSA M&S 8.09-1...

  • Page 2: Table Of Contents

    SECTION 15700 HEATING, VENTILATING AND AIR CONDITIONING EQUIPMENT MAINTENANCE & SERVICE MANUAL FOR CLASSIC HEAT PUMP TABLE OF CONTENTS Chapter Description Page General Description ..............3 Model Identification ..............4 Start-up Instructions ..............5 Ventilation System Calibration ............7 Electrical ..................9 Maintenance ................9 Function & Description of Primary Components ......10 Troubleshooting ..............13 Filing a Service/Warranty Claim ..........23 Warranty Statement ..............24...

  • Page 3: Chapter Description 1.1 General Description

    SECTION 15700 HEATING, VENTILATING AND AIR CONDITIONING EQUIPMENT The purpose of this manual is to provide instructions for maintenance and service for the Marvair Classic™ series of heat pumps. In addition to this manual, there are other pieces of ® literature available from Marvair.

  • Page 4: Model Identification

    1.2 MODEL IDENTIFICATION The Classic heat pump identification numbering system is shown below. The model identification number is on the data label. The data label is at the bottom of the of left side panel. IMPORTANT WHEN CLASSIC SYSTEMS ARE INSTALLED, MODEL NUMBER AND SERIAL NUMBERS ARE TO BE RECORDED AND MAINTAINED IN A LOCATION FOR IMMEDIATE ACCESS WHEN REQUESTING FURTHER INFORMATION.

  • Page 5: Start-Up Instructions

    2.1 START-UP PROCEDURE Important: If your unit has a crankcase heater be sure that the crankcase heater has been energized for at least 24 hours prior to start-up of the unit. Double check all electrical con- nections before applying power. Various thermostats can be used to control the heat pump. The thermostat may have a fan switch with an Automatic and On positions, a system switch with Heat, Cool, and Off positions, and an emergency heat position with lights.
  • Page 6 4. Set the time delay in the Classic™ Heat Pump with Economizer control box to 3 minutes. Check the enthalpy changeover setting of the H205A or dry bulb sensor, and reset it if needed. Refer to the Owner’s manual for instructions on setting the H205A or dry bulb sensor.

  • Page 7: Ventilation System Calibration

    2.2 VENTILATION SYSTEM CALIBRATION Manual Fresh Air System (Configuration N). This is the standard ventilation system in the Classic™ heat pump. Fresh air ventilation by means of a damper can provide up to 15% of rated air flow of outside air. The damper has four positions corresponding to 0, 5, 10 and 15% of rated air flow of outside air.
  • Page 8 with the air flow ((CFM) at various static pressures chart. This chart can be found in the Classic Product Data Sheet or the Installation Manual. This CFM is referred to as "C" in the illustration and equation below. Figure 2. Damper Air Path b.

  • Page 9: Electrical

    model selected. Voltage must be maintained above minimum specified values listed below. Refer to the unit data plate for ampacity requirements. Table 1. Voltage Limitations Electrical Rating Designations* Nominal Voltage 208/230 208/230 Phase Minimum Voltage Maximum Voltage * Letters refer to model number code designations. 3.1 ELECTRICAL Classic heat pumps and air conditioners are built in a wide variety of configurations and op- tions.

  • Page 10: Function & Description Of Primary Components

    Drains Regularly check the primary and secondary condensate drains. The secondary drain has a stand pipe. An obstruction will force water to dump into the middle of the unit and drain out the sides of the Classic™ Heat Pump, causing discoloration of the side panels.
  • Page 11 it removes foreign particulate matter, e.g. dirt, scale, solder particles from the refrigerant to protect the compressor and other components in the refrigerant system with small openings or close tolerances. Second, it absorbs any moisture in the refrigerant with desiccant granules. F.
  • Page 12 The second type of switch is a one time limit switch. If it senses a temperature of 300ºF, power is turned off to the elements. This switch does NOT reset when the temperature drops and must be replaced when it activates. The number and location of both switches is determined by the power supply and the kW of the heaters.

  • Page 13: Troubleshooting

    fan always starts after the compressor, and it will cycle frequently during normal operation at low outdoor conditions. Q. Compressor Time Delay. The time delay module (delay on make) prevents the compressor from restarting immediately after interruption of power. The delay interval, which is adjustable from .2 to 8 minutes, protects the compressor by allowing internal refrigerant pressures to equalize.
  • Page 14 Cooling Mechanical Checks Flow Chart Unit Running? Pressure Problems? High Head Low Head Low Suction Pressure Pressure Pressure Dirty Outdoor Filter Low on Charge Dirty Filters Inoperative Outdoor Low Ambient Dirty Indoor Coil Temperature Overcharge Inoperative Inadequate Indoor Air Compressor Valves Flow Recirculation of Outdoor Check Valve...
  • Page 15 Heating Mechanical Checks Flow Chart Unit Running? Pressure Problems? High Head Low Head Low Suction Pressure Pressure Pressure Dirty Filters Low on Charge Dirty Outdoor Coil Dirty Indoor Coil Low Indoor Inadequate Air Flow Temperature Over Outdoor Coil Inoperative Indoor Closed Indoor Check Inoperative OD Fan Blower...
  • Page 16 Subcooling Calculation 1. Measure the liquid pressure at the liquid line service valve. 2. Convert the liquid line pressure to saturated temperature. See tables below. 3. Measure the liquid line temperature at the liquid line service valve. 4. Compare the liquid line temperature to the saturated temperature. 5.
  • Page 17 Troubleshooting Chart WARNING DISCONNECT ALL POWER TO UNIT BEFORE SERVICING. CONTACTOR MAY BREAK ONLY ONE SIDE. FAILURE TO SHUT OFF POWER CAN CAUSE ELECTRICAL SHOCK RESULTING IN PERSONAL INJURY OR DEATH. Problem/Symptom Likely Cause(s) Correction Unit will not run. Power off or loose electrical Check for correct voltage at unit discon- connection.
  • Page 18 Troubleshooting Chart (cont’d) Problem/Symptom Likely Cause(s) Correction Low head - high vapor Flow check piston size too large. Change to correct size piston. pressures. Defective compressor valves. Replace compressor. Incorrect capillary tubes. Replace coil assembly. Low vapor - cool com- Low indoor air flow.
  • Page 19 Compressor Overheating (cont’d) Problem/Symptom Likely Cause(s) Correction High head pressure. Overcharge. Check system charge. Dirty heat pump coil. Clean coil. Faulty or wrong size heat pump Replace fan motor. fan motor. Faulty outdoor blower. Replace blower. Recirculation of air. Replace with correct rotation motor. Additional heat source.
  • Page 20 Electrical (cont’d) Problem/Symptom Likely Cause(s) Correction No voltage on line side Blown fuses or tripped circuit breaker. Check for short in wiring or unit. of compressor contactor. Improper wiring. Recheck wiring diagram. Improper voltage. High voltage. Power supply problem. Low voltage. Power supply problem.
  • Page 21 Flooding (cont’d) Problem/Symptom Likely Cause(s) Correction Poor system control Overcharge. Check system charge. using capillary tubes. High head pressures. Dirty heat pump. Restricted air flow. Recirculation of air. Evaporator air flow too low. Adjust air flow to 400 CFM/Ton. Thermostatic Expansion Valves High superheat, low Moisture freezing and blocking Recover charge, install filter drier,...
  • Page 22 Thermostatic Expansion Valves (cont’d) Problem/Symptom Likely Cause(s) Correction Compressor flood back Any of the causes listed under Any of the solutions listed under upon start-up symptoms of problem 2. solutions of problem 2. Superheat is low to Unequal evaporator circuit Ensure air flow is equally distributed normal with low loading.

  • Page 23: Filing A Service/Warranty Claim

    7.1 PROCEDURE FOR FILING A WARRANTY CLAIM 156 Seedling Drive • Cordele, GA 31015 • P.O. Box 400 • Cordele, GA 31010-0400 Phone 800-841-7854 • 229-273-3636 • Fax 229-276-1479 • Svc Pager 800-204-8210 MARVAIR SERVICE REQUEST / PURCHASE ORDER FOR SERVICE DATE TIME DATE...

  • Page 24: Warranty Statement

    8.1 WARRANTY If any part of your Marvair Air Conditioner, Heat Pump or Unit Ventilator fails because ® of a manufacturing defect within fifteen months from the date of original shipment from Marvair or within twelve months from the date of original start-up, whichever is the earlier date, Marvair will furnish without charge, EXW Cordele, Georgia, the required replacement part.

  • Page 25: Parts List

    9.1 PARTS LIST Classic™ Heat Pump Parts List - Models HVPA PARTS HVPA24HP HVPA30HP HVPA36HP HVPA42HP HVPA49HP HVPA60HP 10333 (K5) 10298 10349 10352 10310 10313 10384 10378 10385 10388 10388 10389 Compressor, Scroll 10327 10299 10350 10353 10311 10314 10328 10300 10351 10354...
  • Page 26 PARTS HVPA24HP HVPA30HP HVPA36HP HVPA42HP HVPA49HP HVPA60HP Contactor, Compressor, 30 Amp 50020 50020 50020 50020 Contactor, Compressor, 40 Amp 50030 50030 Contactor, Compressor, 30 Amp HPC/HPD 50040 50040 50040 50040 50040 50040 Control Board, Heat Pump, 92030 92030 92030 92030 92030 92030 Relay, Fan Blower Control (BTR)
  • Page 27 Classic™ Heat Pump Parts List - Models HVPSA PART HVPSA36HP HVPSA42HP HVPSA49HP HVPSA60HP 10334 10345 10337 10340 Compressor, Scroll 10335 10346 10338 10341 10336 10355 10339 10342 Capacitor, Scroll Compressor 50315 50321 50321 50315 (Two) ufd/volts 40 / 370 45 / 370 45 / 370 40 / 370 19012...
  • Page 28 PART HVPSA36HP HVPSA42HP HVPSA49HP HVPSA60HP Relay, Fan Blower Control (BTR) Standard 50419 50419 50419 50419 Relay, B-Damper B-Damper 50420 50420 50420 50420 Actuator, Motor, B-Damper 40107 40107 40107 40107 Lockout Relay (LOR) 50214 50214 50214 50214 Clip for Low Vibration 01257 01257 01257...

This manual is also suitable for:

Marvair classic hvpa30hpMarvair classic hvpa36hpMarvair classic hvpa42hpMarvair classic hvpa49hpMarvair classic hvpa60hpMarvair classic hvpsa36hp ... Show all

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