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Classic HVPA & HVPSA M&S 8.09-1 

15700 - 24 

HVAC Equipment

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. Any transportation, related service labor, diagnosis calls, filter, 

driers, and refrigerant are not included. The owner must provide proof of the date of 

the original start-up. The owner’s registration card filed with Marvair, the contractor’s 

invoice, the certificate of occupancy or similar document are examples of proof of the 

date of the original start-up.

In addition, if the hermetic compressor fails because of a manufacturing defect within 

sixty months from the date of original shipment from Marvair

®

, Marvair will furnish 

without charge, EXW Cordele, Georgia, the required replacement part.  Any related 

service labor, diagnosis calls, filter, driers and refrigerant are not included. Marvair will 

pay for non-priority shipping costs of the compressor during the first twelve months 

of the warranty period. After the first twelve months of the warranty period, all costs 

of shipment and risk of loss during the shipment of the compressor shall be the 

responsibility of the owner.

The owner of the product may ship the allegedly defective or malfunctioning product or 

part to Marvair

®

, at such owner’s expense, and Marvair will diagnose the defect and, if 

the defect is covered under this warranty, Marvair will honor its warranty and furnish the 

required replacement part. All costs for shipment and risk of loss during shipment of the 

product to Marvair and back to the owner shall be the responsibility and liability of the 

owner. Upon written request by an owner, Marvair may arrange for remote diagnosis of 

the allegedly defective or malfunctioning product or part but all costs for transportation, 

lodging and related expenses with regard to such diagnostic services shall be the 

responsibility and liability of the owner.

An owner requesting performance under this Warranty shall provide reasonable 

access to the allegedly defective or malfunctioning product or part to Marvair

®

 and its 

authorized agents and employees.

This warranty applies only to products purchased and retained for use within the 

U.S.A., Canada, and Mexico.  This warranty does not cover damage caused by improper 

installation, misuse of equipment or negligent servicing.

THIS WARRANTY CONSTITUTES THE EXCLUSIVE REMEDY OF ANY PURCHASER OF 

A MARVAIR

®

 HEAT PUMP OR AIR CONDITIONER AND IS IN LIEU OF ALL OTHER 

WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY 

IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR USE, TO THE FULLEST 

EXTENT PERMITTED BY LAW.  IN NO EVENT SHALL ANY IMPLIED WARRANTY OF 

MERCHANTABILITY OR FITNESS FOR USE EXCEED THE TERMS OF THE APPLICABLE 

WARRANTY STATED ABOVE AND MARVAIR SHALL HAVE NO OTHER OBLIGATION 

OR LIABILITY. IN NO EVENT SHALL MARVAIR BE LIABLE FOR INCIDENTAL OR 

CONSEQUENTIAL DAMAGES OR MONETARY DAMAGES.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE 

OTHER RIGHTS WHICH VARY FROM STATE-TO-STATE.  Some states do not allow 

limitations or exclusions, so the above limitations and exclusions may not apply to you.

Summary of Contents for Marvair Classic HVPA24HP

Page 1: ...rained professional HVAC service person Due to continuous product improvement use only the current issue of this manual The latest version can be downloaded from the Marvair website www marvair com Cl...

Page 2: ...EAT PUMP TABLE OF CONTENTS Chapter Description Page 1 1 General Description 3 1 2 Model Identification 4 2 1 Start up Instructions 5 2 2 Ventilation System Calibration 7 3 1 Electrical 9 4 1 Maintenan...

Page 3: ...ion systems operate when there is a call for cooling or heating or independently to provide fresh air Note that with the manual motorized fresh air vent and the power vent options if the compressor is...

Page 4: ...ering 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...

Page 5: ...the thermostats system switch to Cool or Auto position Nothing should operate at this time 4 Set the time delay in the control box to three minutes Note that time delay is an option on some Classic u...

Page 6: ...e low enthalpy conditions causing the economizer damper to open Alternately when outdoor conditions are lower than the set point a source of heat such as a hair dryer can be directed on the air temper...

Page 7: ...sure the quantity of the return air from the room Subtract the return air from the supply air The difference is the amount of fresh air c Loosen the set screw that holds the collar onto the rod connec...

Page 8: ...entage of C A and B must equal 100 Measure the temperature of the indoor return air Multiply the temperature of the indoor air by B d Calculate what the Tmix should be with the desired quantity of out...

Page 9: ...coil the cabinet and condensate drains should be serviced as described below Also at this time the heat pump should be operated in the cooling and heating cycles as described in Chapter 3 Start Up In...

Page 10: ...itial field start up of the system Verification of proper rotation is made by observing that the suction pressure drops and the discharge pressure rises when the compressor is energized An alternate m...

Page 11: ...ssic uses a thermal expansion valve on the indoor cooling circuit and a fixed orifice on the outdoor heating circuit H Reversing Valve The reversing valve reverses the refrigerant s direction of flow...

Page 12: ...ped with an exhaust fan air speed control which controls the ventilation exhaust blower independently of the fresh air intake blower Demand Control Ventilation A field or factory installed carbon diox...

Page 13: ...k NO Voltage on Compressor Side of Contactor YES NO Run Capacitor Voltage on Line Side of Contactor Compressor Internal Overload Open NO YES Compressor Winding Open Circuit Breakers or Fuses Open Comp...

Page 14: ...door Coil Overcharge Inoperative Compressor Valves Inadequate Indoor Air Flow Recirculation of Outdoor Air Outdoor Check Valve Closed Inoperative Indoor Blower Non condensibles Restricted Indoor Meter...

Page 15: ...Metering Device Restricted Outdoor Metering Device Non condensibles Restricted Filter Drier Restriction in System Wrong Indoor Blower Rotation Reversing Valve Failure Closed Indoor Check Valve Inadeq...

Page 16: ...ately 6 to 8 from the compressor 4 Compare the suction line temperature to the saturated temperature 5 The difference between saturated temperature and suction line temperature is the superheat Superh...

Page 17: ...hours for overload to reset If still open replace the compressor Add start kit components 1 2 3 4 Insufficient cooling Improperly sized unit Improper indoor air flow Incorrect refrigerant charge Air n...

Page 18: ...er refrigerant evacuate and recharge 1 2 Gurgle or pulsing noise at expansion device or liquid line Air or non condensibles in sys tem 1 Recover refrigerant evacuate and recharge 1 Service Analyzer Ch...

Page 19: ...it wiring Located in supply air stream Differential setting too close Customer mis use Internal foreign matter Power element failure Valve too small Distributor tube tubes restricted Restricted with f...

Page 20: ...ing 1 Welding scale Nitrogen not used 1 Soldering flux Adding flux before seating copper part way 1 Excess soft solder Wrong solder material 1 Loss of Lubrication Low suction pressure Low charge Refri...

Page 21: ...charge Remove restriction in liquid line Correct the refrigerant charge Remove non condensible gases Use correct TXV Remove external equalizer line restriction Replace with correct valve Replace power...

Page 22: ...ng bulb is affected by liq uid refrigerant or refrigerant oil flowing through suction line Unequal refrigerant flow through evaporator circuits Improper superheat adjust ment only possible with TXV ha...

Page 23: ...r service centers Warranty Policy Information Agreement then fax back to 229 273 5154 Invoices will be paid in accordance with Labor Allowance Guidelines included with this PO Failure to follow these...

Page 24: ...is covered under this warranty Marvair will honor its warranty and furnish the required replacement part All costs for shipment and risk of loss during shipment of the product to Marvair and back to...

Page 25: ...Motor Double Shafted 240 Volt ECM 40087 40081 40081 40081 40090 40090 Blower L H 30050 30090 30090 30090 30090 30090 Blower R H 30055 30092 30092 30092 30092 30092 Blower Wheel Housing 9 7T DD 10 8 D...

Page 26: ...A P 50008 3 0 KVA P 50008 3 0 KVA Contactor Heat 2 Pole 30A 4 to 5 kW 50020 50020 50020 50020 50020 50020 Contactor Heat 3 Pole 40A 6 to 10 kW 50030 50030 50030 50030 50030 50030 Contactor Heat 3 Pole...

Page 27: ...3 70363 Cable Assembly 01511 01511 01511 01511 Power Cable Assembly 01512 01512 01512 01512 Outdoor Motor 40098 40098 40051 40051 HP RPM 1 3 825 1 3 825 1 2 825 1 2 825 Capacitor Outdoor 50240 50240 5...

Page 28: ...P 50007 2 0 KVA P 50008 3 0 KVA P 50008 3 0 KVA Contactor Heat 2 Pole 30A 4 to 5 kW 50020 50020 50020 50020 Contactor Heat 3 Pole 40A 6 to 10 kW 50030 50030 50030 50030 Contactor Heat 3 Pole 30A HPC...

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