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Mestek SpacePak ESP-JV Series - User Manual

Mestek SpacePak ESP-JV Series
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SECTION 3: START UP & OPERATION
Sequence of Operation............................................. 20
Prior to Start-Up ....................................................... 20
System Start-Up & Adjustments............................... 20
Charging Cooling Only Systems............................... 24
Factors Affecting the Balance of the System............ 24
SECTION 4: MAINTENANCE
Before Each Cooling Season.................................... 25
If System Fails to Operate........................................ 25
Troubleshooting Guide.......................................... 26-29
Service/Troubleshooting Form.................................. 31
Parts List................................................................... 32
WARRANTY INFORMATION......................Back Cover
IN UNITED STATES: 260 NORTH ELM ST. WESTFIELD, MA 01085 (413) 564-5530/FAX (413) 564-5815
IN CANADA: 7555 TRANMERE DRIVE, MISSISSAUGA, ONTARIO, L5S 1L4 (905) 670-5888/FAX (905) 670-5782
COPYRIGHT® 2017
Central Air Conditioning Series
2 to 5 Tons
Fan Coil Unit/Air Supply
Components
MODEL
ESP-JV SYSTEM
INSTALLATION,
OPERATION
& MAINTENANCE
MANUAL
ESPJV2-0218
W30-WG0890
SECTION 1: INTRODUCTION
SpacePak System Design........................................ 2
Code Compliance..................................................... 2
Air Distribution Requirements .................................. 2
Air Distribution Components..................................... 3
Shipment of Unit....................................................... 5
SECTION 2: SYSTEM INSTALLATION
Step 1: Locating the Unit.......................................... 6
Step 2: Cutting Return Air Opening.......................... 7
Step 3: Attaching Supply Air Plenum Adaptor.......... 8
Step 4: Setting the Unit............................................. 8
Step 5: Connecting Refrigerant Lines....................... 8
Step 6: Installing the Condensate Trap & Line......... 9
Step 7: Wiring the Unit...........................................10-15
Step 8: Installing Air Distribution Components......... 16

Table of Contents

Questions and Answers

  • S
    Steven FarrellAug 17, 2025
    How to fix insufficient cooling in my Mestek Air Conditioner?
    • D
      Danny BurkeAug 17, 2025
      If your ESP-JV & Condensing units are running but the cooling is insufficient, several issues could be the cause. It could be due to low or high suction pressure, in which case you should charge to proper subcooling according to manufacturer’s instructions. Install a sight glass near the indoor unit and monitor. Also, clean the air filter and evaporator coil. Remove any obstructions. Another cause can be low or high head pressure, so you should charge to proper subcooling according to condensing unit manufacturer’s instructions. Replace the fan motor if it is defective and clean the condensing unit coil. Finally, check for distribution system air leaks, making sure all joints are airtight and verifying static pressure.
  • J
    Joshua BrownAug 20, 2025
    What to do if my Mestek SpacePak ESP-JV ESP-JV unit and condensing unit will not start?
    • L
      Logan MoralesAug 20, 2025
      If your ESP-JV unit & condensing unit will not start, consider these potential causes: The thermostat might not be level, so level it if necessary. The thermostat could be defective, so replace it if there's no resistance. Check for loose low voltage wiring and tighten all loose connections. Other potential issues include a defective blower relay or low voltage transformer, which would need replacement. Finally, ensure adequate electrical service; replace the electrical service with an adequately sized service if it's inadequate.
  • D
    dromeroAug 25, 2025
    What to do if my Mestek Air Conditioner ESP-JV unit will not start, but the condensing unit runs?
    • Q
      qlopezAug 26, 2025
      If the ESP-JV unit will not start, but the condensing unit runs, the issue might be due to shorted or broken wiring, in which case you should repair or replace the wiring. Also, check for loose low or high voltage wiring, and tighten all loose connections. Another potential cause is a defective blower motor, so replace the motor if it is defective.
  • R
    Roberta WilliamsonAug 28, 2025
    What to check if my Mestek SpacePak ESP-JV ESP-JV unit runs, but the condensing unit will not start?
    • S
      Sherri PetersonAug 28, 2025
      If the ESP-JV unit runs, but the condensing unit will not start, consider these potential causes: A defective thermostat could be the issue, so replace it if there is no resistance. Check for loose low or high voltage wiring and tighten all loose connections. Also, inspect the float switch and anti-frost switch (wired in series). If there's no voltage, the fan relay is likely defective, so replace it. If there's no ice on the coil and the water level in the drain pan is normal, check each switch for continuity. If a switch lacks continuity, replace it. Repair or replace the switches as directed by the manufacturer.
  • L
    Lindsay HuynhAug 30, 2025
    Why my Mestek Air Conditioner ESP-JV unit won't start, but the condensing unit cycles?
    • D
      Dalton DavisAug 30, 2025
      If your ESP-JV unit will not start, but the condensing unit cycles, the problem could stem from incorrect low voltage connections, so correct them. Alternatively, check for loose low voltage connections and tighten them. A defective blower relay or blower motor could also be responsible, so replace them if defective.
  • D
    Douglas McmillanSep 2, 2025
    What causes my Mestek SpacePak ESP-JV ESP-JV unit to cycle while the condensing unit runs?
    • S
      Scott PhillipsSep 2, 2025
      If the ESP-JV unit cycles, but the condensing unit runs, a potential cause is the blower motor. If it's defective, replace it. If the cycling is excessive, the motor may be overloaded. Check the supply duct for breaks or leaks.
  • G
    Gregory BakerSep 5, 2025
    How to reduce excessive noise at the terminator of my Mestek Air Conditioner?
    • E
      Elizabeth ChavezSep 5, 2025
      To address excessive noise at the terminator, consider the following: High supply air plenum static pressure might be the cause, so check for and add flow restrictors as necessary in supply runs, and add additional outlets if needed. Ensure a sound attenuating tube is installed where necessary. Correct the radius if there's a tight radius in the sound attenuating tube or in the supply tubing. Also, correct the supply tubing length if it is incorrect. Finally, properly orifice supply tubing runs to balance the system.
  • S
    Stephanie HolmesSep 8, 2025
    Why is there excessive vibration at my Mestek SpacePak ESP-JV ESP-V unit?
    • J
      jonesaprilSep 8, 2025
      Excessive vibration at the ESP-V unit could be due to a noisy blower motor assembly. Try tightening all fasteners. If the noise persists, replace the motor. Also, tighten or replace the blower wheel as necessary.
  • R
    rebecca58Sep 12, 2025
    Why is there sweating at the ESP-JV unit supply outlet of my Mestek SpacePak ESP-JV Air Conditioner?
    • J
      John PerezSep 12, 2025
      Sweating at the ESP-JV unit supply outlet can occur due to an air leak at the supply air plenum adapter; tape the joint properly. Alternatively, it could be due to insulation not being installed at the outlet, so install insulation.
  • J
    Joshua SnyderSep 13, 2025
    How to fix excessive noise at the return air grill of my Mestek Air Conditioner?
    • S
      Sarah ChenSep 13, 2025
      Excessive noise at the return air grill might be caused by a return air duct not installed properly; correct the bend in the return air duct to a minimum of 90°. Another cause could be a dirty return air filter, so clean or replace the air filter.

Mestek SpacePak ESP-JV Series Specifications

General IconGeneral
RefrigerantR410A
SeriesESP-JV Series
TypeDuctless Mini-Split Air Conditioner
Cooling Capacity9, 000 - 36, 000 BTU/h
Power Supply208-230V/60Hz/1Ph
Operating Temperature (Heating)-15°C to 30°C
Sound Pressure Level (Outdoor)52-58 dB(A) (depending on model)

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