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Marvair Scholar QV VACA Installation And Start-Up Instructions Manual

Heat pump & air conditioner
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INSTALLATION AND
START-UP
Models VACA/VACSA & VAHA/VAHSA
2, 2.5, 3, 3.5, 4 & 5 Tons
SAFETY REQUIREMENTS
• If the information in these instructions
are not followed exactly, a fire may result
causing property damage, personal injury or
loss of life.
• Read all instructions carefully prior to
beginning the installation. Do not begin
installation if you do not understand any of
the instructions.
• Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
• Installation and service must be performed
by a qualified installer or service agency in
accordance with these instructions and in
compliance with all codes and requirements
of authorities having jurisdiction.
• Follow all safety codes.
MODEL NO.: ______________________ SERIAL NO.: _________________
DATE OF START-UP.: _______________
P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015
The most current version of this manual can be found at www.Marvair.com.
WARNING
Manufactured By:
Marvair Division of the AIRXCEL
(229) 273-3636 • Fax (229) 273-5154
www.Marvair.com
Scholar QV™
Heat Pump & Air Conditioner
(CSI 15740)
Marvair Scholar QV™ VACA/VAHA I&S Manual 3/2019 Rev.18
Scholar QV™
®
P/N 01274

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  • Page 1 P.O. Box 400 • Cordele, Georgia 31010 • 156 Seedling Drive • Cordele, Georgia 31015 (229) 273-3636 • Fax (229) 273-5154 www.Marvair.com The most current version of this manual can be found at www.Marvair.com. Marvair Scholar QV™ VACA/VAHA I&S Manual 3/2019 Rev.18 P/N 01274...
  • Page 2 How To Use This Manual This manual is intended to be a guide to the Marvair Scholar QV™ line of vertical packaged heat pumps and ® air conditioners. It contains installation, troubleshooting, maintenance, warranty, and application information. The information contained in this manual is to be used by the installer as a guide only. This manual does not supersede or circumvent any applicable national or local codes.

  • Page 3: Table Of Contents

    Appendix C Wet Heat/Plenum Installation ............51 Appendix D Trim Strip Installation ..............57 Appendix E Wall Bracket Installation ...............59 Appendix F Outdoor Louver/Collar Installation..........61 Appendix G Sound Reduction Panel ...............65 15700 - 3 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 4: Tools/Field Furnished Supplies

    Base stands are shipped on a wooden skid and are enclosed in shrink wrap. Trim pieces are enclosed in corrugated carton and strapped to a wooden skid. The sound reduction panel is shipped in a wooden crate after being shrink wrapped. 15700 - 4 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 5 C = March G = July L = November F = 2016 J = 2020 D = April H = August M = December G = 2017 K = 2021 15700 - 5 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 6 Scholar QV Heat Pump Model VACA Access to: • electrical control center • ventilation system • disconnect • condensate disposal Identi cation Plate (lower front corner) Exhaust Air Grille 15700 - 6 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 7: Standard Controls

    A fault LED located on the PLC indicates that a lockout has occurred and whether it is due to high or low refrigerant pressure. C. Heat Related Controls The outdoor thermostat (heat pump only), factory set at 40°F, determines the tem- 15700 - 7 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 8: A Thermostats & Sub-Bases

    Adjustable temperature differential. Keypad lockout. Status LED. °F or °C selectable. Title 24 compliant. 2. Digital, non-programmable thermostat (p/n 50252) Two stage heat/Two stage cool. Manual or auto changeover. Fan: Auto & On. Permanent retention 15700 - 8 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 9 Keypad lockout. Status LED. °F or °C selectable. Optional remote sensors for outdoor air, supply air and humidity. Title 24 compliant. 5. The direct digital control (DDC) interfaces with the building automation system (BAS) is to be defined by the specifier, in consultation with the Marvair sales ®...

  • Page 10: B Optional Controls

    These heaters are factory installed and no field installation is required. See price pages for part numbers. 15700 - 10 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 11 Latitude Line Shown and Noted by the Following Cities: Columbia, SC; Atlanta, GA; Gadsden, AL; Tupelo, MS; Pine Bluff, AR; Lubbock, TX; Roswell, NM; Phoenix, AZ; and Los Angeles, CA. North Latitude North Latitude 15700 - 11 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 12: Location Preparation

    MODEL 24/30/36/40 36.75 47.25 47.25 48.00 59.75 59.75 32.00 32.00 32.00 36.00 36.00 36.00 *When 4”high base stand is used, the C* dimension is specified. Dimensions are in inches. 15700 - 12 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 13: Power And Control Wiring (Rough-In)

    1/2” from the classroom floor to allow the Scholar QV heat pump and air conditioner to slide into the wall opening. Reference Figures 3 and 4 as noted above, for control wiring entry points into the cabinet. 15700 - 13 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 14 Figure 3. Scholar QV™ Heat Pump and Air Conditioner Models VAHA24/30/36/40 Dimensional Data 15700 - 14 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 15 Figure 4. Scholar QV™ Heat Pump and Air Conditioner Models VAHA49/VACA60 Dimensional Data 15700 - 15 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 16: Condensate Drain Line (Rough-In)

    Fasten the plenum to the top of the cabinet in accordance with the instructions included with the plenum or Appendix C at end of manual. 15700 - 16 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 17 G. Weather Panels are field supplied and do not come with the Scholar QV™ heat pump or air conditioner. If a weather panel covers the wall opening described in Figure 2, remove the weather panel prior to installing the unit into the wall opening. 15700 - 17 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 18: Installation Through The Outside Wall

    B. To minimize sound in the classroom, insulate all four sides of the outdoor air box that is internal to the classroom with the following: Layer 1: 1/2” Rubatex Layer 2: 1-1/2: Duct Board 15700 - 18 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 19: Electric, Condensate And Wet Heat Hook-Ups

    ALL ELECTRICAL, PLUMBING, HOT WATER FITTING AND REFRIGERATION WORK MUST MEET THE REQUIREMENTS OF LOCAL AND NATIONAL CODES AND ORDINANCES. WORK SHOULD BE DONE ONLY BY PROFESSIONALLY QUALIFIED AND TRAINED SERVICE PEOPLE. 15700 - 19 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 20 An alternate method of verification for self contained system with small critical refrigerant charges, where the installation of gauges may be objectionable, can 15700 - 20 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 21 Route wires into the terminal strip compartment through the openings provided. Connect wiring to the terminal strip as shown in Figure 13 for a remote, wall mounted thermostat installation. 15700 - 21 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 22 Figure 8a. Front View of Models 24/30/36/40 with Front Doors Open Figure 8b. Front View of Models 49/60 with Front Doors Open FRONT OF UNIT 15700 - 22 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 23 Figure 9. Typical Control Center Layout for Air Conditioner Models 24/30/36/40 Due the wide variety of options, the control center in your unit may have different components from what is shown. 15700 - 23 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 24 Figure 10. Typical Control Center Layout for Air Conditioner Models 49/60 Due the wide variety of options, the control center in your unit may have different components from what is shown. 15700 - 24 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 25 Figure 11a. Typical Wiring Schematic for Heat Pump Model, Single Phase Power Due the wide variety of options, the control center in your unit may have different components from what is shown. 15700 - 25 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 26 Figure 11b. Typical Wiring Schematic for Air Conditioner Model, Single Phase Power Due the wide variety of options, the control center in your unit may have different components from what is shown. 15700 - 26 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 27 Figure 12a. Typical Wiring Schematic for Heat Pump Model, Three Phase Power Due the wide variety of options, the control center in your unit may have different components from what is shown. 15700 - 27 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 28 Figure 12b. Typical Wiring Schematic for Air Conditioner Model, Three Phase Power Due the wide variety of options, the control center in your unit may have different components from what is shown. 15700 - 28 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 29 (24 VAC pilot duty) between terminals V1 and V2. When the field supplied contacts between V1 and V2 are closed the ventilation package will operate when the Indoor Fan/Blower is energized. 15700 - 29 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 30: Ventilation System Calibration

    The fresh air door should be set in accordance with the amount of fresh air flow re- quired, up to a maximum of 450 CFM. Figure 14 illustrates the fresh air door settings and air flow rates. 15700 - 30 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 31 FULL OPEN B is securely fastened at the desired opening. 420-450 CFM Note: Once calibrated, the manual fresh air system door remains at the set opening at all times. 15700 - 31 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 32: Control Adjustments

    • Assist in troubleshooting • Perform extensive self diagnosis and indicate a fault • Store statistical operational data • Be programmed remotely or with a removable program storage device 15700 - 32 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 33 The indicator on the knob is the gap between the two protrusions with the hollow centers on the knob. (See drawing below). For both control timers, turning the knob clockwise increases the time period. 15700 - 33 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 34 When turned completely to the right (clockwise), the time interval is 90 minutes. The knob allows setting the defrost time anywhere between 30 and 90 minutes, i.e., mid- way between the 30 and 90 minutes is 60 minutes. The Marvair factory set point is ®...
  • Page 35 DFC – Defrost Control Thermostat. Indicates whether the defrost thermostat is closed. The defrost cycle is based upon both time (see defrost timer) and outdoor coil temperature. (heat pump only) 15700 - 35 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 36 PLC. • SF – System fault indicates an internal fault in the PLC. The fault can be found using the Microwin Programming System and an external PCI cable. 15700 - 36 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 37 If the SCKT LED is on indicating that the S Circuit function is selected, the CC and OFM indicators will be off and the HTR indicator will be on. Refer to table below. ODS SCKT 15700 - 37 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 38 In addition to field malfunctions such as a bad Compressor Contactor, the system performs a diagnostics on itself about 100 times per second. If any internal faults are found the 15700 - 38 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 39 X – Indicates that this function should be on. 15700 - 39 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 40 Figure 18. Reference unit label for minimum required air flow settings for specific unit model. Figure 18. Indoor Blower Speed Control Adjustment Instructions SERIES 706 VARI-SPEED MOTOR CONTROL 15700 - 40 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 41 The Scholar QV air conditioners use a modulating head pressure controller to vary the speed of the condenser fan motor based upon the temperature of the condenser coil. A 15700 - 41 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 42: Remote Thermostat Installation

    Concealed Pipe or Ducts Behind Doors Registers Stairwells - Drafts Corners and Alcoves TV Sets Doors - Drafts Radio Unheated Rooms on Other Lamps Side of Wall Direct Sunlight 15700 - 42 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 43: Start-Up Procedure

    National Electric Code, and with local electrical codes, where they prevail. MARVAIR ® /SIMPLE COMFORT THERMOSTAT CONNECTION DIAGRAM for Marvair Heat Pumps and Air Conditioners (without hot gas reheat or electric reheat) THERMOSTAT PART NUMBER NOTE 4 NOTE 1...
  • Page 44 The indoor blower will continue to run and turn off after 90 seconds. 6a. Heating (heat pump version only) a. Put the thermostat system switch to “HEAT” mode. Wait five minutes after 15700 - 44 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 45: Exploded Views And Parts Lists

    Current parts lists and exploded views of the unit can be found on our web site at www.marvair.com. Click on the Service and Parts in the menu on the left hand side of the Home page. From the drop down menu, select Exploded Views.

  • Page 46: Appendix A Ratings And Data

    *Two (2) return air filters are required for each unit. **With GreenWheel™ ventilation system. 1 Optional 2” Filter Figure 3. Shipping Weight (pounds) BASIC MODEL VOLTAGE - 230 VOLTAGE - 460 15700 - 46 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 47: Appendix B Base Stand Installation

    The unit will be located directly on top of the base stand, and the base stand will be anchored to the floor. 15700 - 47 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 48 Figure 1a. Top View of Base Stand Part Number S/02093 (For 24/30/36/40) Figure 1b. Top View of Base Stand Part Number S/02791 (For 49/60) 15700 - 48 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 49 Tighten bolts evenly to affix the cabinet firmly to base stand. IMPORTANT DO NOT OVERTIGHTEN MACHINE BOLTS OR CABINET BASE WILL BOW. 15700 - 49 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 50 • condensate disposal Keyed Disconnect Behind Right Panel Identi cation Plate (left cabinet panel, lower front corner) Base Stand Source Water Exhaust Air Grille Through Bttom Arrow Points Forward 15700 - 50 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 51: Appendix C Wet Heat/Plenum Installation

    A. Freeblow and Ducted Plenums to be used with electric resistance heat or no heat have part numbers and model numbers, and are installed on the Scholar QV™ models/designated as follows: 15700 - 51 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 52 THE ELECTRIC POWER TO “OFF” AT THE DISCONNECT LOCATED BEHIND THE KEY LOCKED DOOR ON THE LOWER FRONT PANEL. FAILURE TO DO THIS COULD RESULT IN PROPERTY DAMAGE, BODILY INJURY OR DEATH. 15700 - 52 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 53 Swap the front and back panels of the plenum. This should put the blank off plate facing the exterior wall and not visible from the classroom. 15700 - 53 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 54 Galvanized metal duct extensions should be used to simplify connections to ductwork and grilles. Use fabric boots to prevent the transmission of vibration through the duct system. The fabric must be U.L. rated to a minimum of 197°F. 15700 - 54 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 55 Figure 2, and to the control center. The leads are then connected to the terminals in the control center as denoted on the wire leads. 15700 - 55 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 56 2. After turning the disconnect to “OFF” position, replace appropriate plenum and cabinet panels after rechecking and tightening all new electrical connections and checking wiring for appropriate protection from sharp edges and clearance from moving parts, etc. 15700 - 56 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 57: Appendix D Trim Strip Installation

    Check the cabinet for vertical plumb and parallelism to the inside of the finished wall prior to installing the trim strips. 15700 - 57 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 58 Figure 1. Installation of Trim Strips to Scholar QV™ Heat Pump or Air Conditioner Freeblow Plenum Trim Piece Zinc Coated Sheet Metal Screws 1/2” Long Inside of Finished Wall 15700 - 58 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 59: Appendix E Wall Bracket Installation

    Check the cabinet for vertical plumb and parallelism to the inside of the finished wall prior to installing the wall brackets. 15700 - 59 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 60 Figure 1. Installation of Wall Brackets (One on Each Side of Unit) Plenum Assembly Minimum of 1/2” from Bracket of Cabinet Wall Bracket Self Tapping Sheet Metal Screws 1/2” Long Two Wall Anchors Inside of Finished Wall 15700 - 60 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 61: Appendix F Outdoor Louver/Collar Installation

    Part Number Description 80760 Clear anodized louver/collar assembly 80761 Clear anodized louver 80762 Clear anodized collar 80763 Dark bronze louver/collar assembly 80764 Dark bronze louver 80765 Dark bronze collar 15700 - 61 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 62 After installation, the Scholar QV air box should be from 1-1/4” to 1-3/8” from the outside surface of the finished wall, as shown in Figure 1. 15700 - 62 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 63 The louver itself may be fastened to the air box as shown in Figure 2. C. Collar The collar itself may be fastened to the outside wall by following the instructions in Figure 2. 15700 - 63 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 64 5. Some applications may require that the louver collar be fastened to the exterior wall. Installer must drill required holes in the collar as located in Figure (1-1). OUTSIDE LOUVER WITH COLLAR 15700 - 64 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

  • Page 65: Appendix G Sound Reduction Panel

    Remove all sound reduction panel parts from the wooden container and identify them referencing Figure 1. Retain the bag of screws for use in assembling and installing the sound panel components. 15700 - 65 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 66 THIS EQUIPMENT MUST BE INSTALLED IN CONFORMANCE WITH ALL APPLICABLE LOCAL AND NATIONAL ELECTRICAL, PLUMBING AND BUILDING CODES. THIS EQUIPMENT SHOULD BE INSTALLED AND SERVICED ONLY BY A TRAINED PROFESSIONAL HVAC SERVICE PERSON. 15700 - 66 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...
  • Page 67 G. Attach doors (lower first) to framework by slipping hinge on door over the hinge post on framework. Close doors and tighten captive screws to framework. 15700 - 67 Marvair Scholar QV™ VACA/VAHA I&S Manual 03/2019 Rev.18...

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