EasyManua.ls Logo

Hubbell EMV - User Manual

Hubbell EMV
20 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
OPERATING AND MAINTENANCE MANUAL
FOR PACKAGED ELECTRIC TEPID
WATER HEATING SYSTEM
ELECTRIC HEATER COMPANY
BASE MODEL “ EMV ”

Table of Contents

Questions and Answers

  • M
    Miguel WilliamsAug 7, 2025
    Why is Hubbell EMV Water Heater temperature always below setting?
    • C
      Christina CookAug 7, 2025
      If the water temperature in your Hubbell Water Heater tank is consistently below the set temperature, there are a few potential causes to investigate. Start by checking the thermostat adjustment and monitoring it. If necessary, replace the thermostat. Also, verify that the heating element is functioning on all phases by checking the resistance (ohms) value for each element and comparing it with the provided chart. Finally, ensure that the water heater is appropriately sized for your system's flow rate and temperature rise; replace elements with the correct size if needed.
  • L
    lbarnesAug 13, 2025
    What to do if Hubbell EMV Water Heater relief valve discharges continuously?
    • D
      David CummingsAug 13, 2025
      The temperature and pressure relief valve on your Hubbell Water Heater is designed to discharge if the water temperature exceeds 210°F or if the water pressure exceeds the valve's pressure rating. Continuous discharge often indicates excessive temperature or pressure within the tank. If the issue is excessive temperature, the thermostat may not be shutting off at the correct setting, which means the thermostat needs replacement.
  • C
    Christopher RossAug 19, 2025
    Why is Hubbell EMV tepid water temperature too hot?
    • J
      joseph91Aug 19, 2025
      If the tepid water temperature from your Hubbell Water Heater is too hot, it could be due to a blockage in the cold water inlet to the mixing valve. Try disconnecting the mixing valve and cleaning out the cold water inlet pipe. Alternatively, the mixing valve might be out of calibration. In this case, you should re-calibrate the mixing valve.
  • M
    Mr. Bruce FitzpatrickAug 26, 2025
    What to do if Hubbell EMV tepid water temperature is too cold?
    • E
      Erica CookAug 26, 2025
      If the tepid water temperature from your Hubbell Water Heater is too cold, it may be caused by a blockage in the hot water inlet to the mixing valve. You can resolve this by disconnecting the mixing valve and cleaning out the hot water inlet pipe. Another possible cause is that the mixing valve is out of calibration, which would require you to re-calibrate the mixing valve.
  • C
    Charles LawrenceOct 31, 2025
    How to troubleshoot no hot water in Hubbell EMV?
    • T
      Tonya SmithOct 31, 2025
      If there is no hot water in your Hubbell Water Heater tank, several issues could be the cause. First, check if the circuit breaker has tripped and reset it if necessary. Another possible cause is a tripped high limit switch, which would also need to be reset. Loose wires can also prevent heating, so ensure all screws holding wires are tightened. The heating element itself might be inoperable; test it by clamping an Amprobe around each wire to check the ampere reading against the nameplate figure. Low line voltage could also be the culprit, in which case you should have an electrician check the source electrical system. Lastly, a faulty thermostat could be the reason; try moving the thermostat dial through its full range to listen for a definite ‘click.’ If there's no click, consider replac...

Summary

General Description and Construction

General Description of Tepid Water Heater

Describes the packaged electric water heater system for tepid water delivery, including its components.

Construction Details of Water Heater

Details tank construction, connections, heating elements, thermostat, and high limit switch.

Mixing Valve and System Components

Details mixing valve, air vent, pressure gauge, and insulation.

Optional Features for Water Heater

Lists optional features like alarms, weather package, and explosion proof construction.

Installation and Start-Up Procedures

Water Heater Placement Guidelines

Provides guidelines for selecting a clean, dry location, protecting from freezing, and ensuring clearance.

Piping Installation Instructions

Details connecting water inlet/outlet, relief valve, overflow pipe, and expansion tank.

Heater Filling Procedure

Steps to fill the heater, including opening outlets and air vent, and closing drain valve.

Electrical Installation Steps

Instructions for entering junction box and connecting feeder leads with wire nuts.

Final Installation Checks

Check connections, ensure steps are complete, and monitor temperature after first heating.

Recirculation Package Description

Details how a recirculation loop provides tepid water at fixtures for distant applications.

Scheduled Maintenance and Operation

Freezing Prevention Measures

Instructions to drain the tank if electricity is off or freezing is a risk.

Monthly Mixing Valve Inspection

Monthly checks of the mixing valve, including temperature monitoring and flow rate testing.

Quarterly Inspection Procedures

Quarterly checks for thermostat, relief valve, element flange leaks, and electrical connections.

Annual Tank Flushing Procedure

Annual procedure to flush the tank, involving draining and refilling with power on/off.

Troubleshooting Common Issues

No Hot Water Troubleshooting

Troubleshooting steps for when there is no hot water in the tank.

Low Water Temperature Troubleshooting

Troubleshooting steps for when water temperature is below settings.

Relief Valve Discharge Troubleshooting

Troubleshooting steps for a continuously discharging relief valve.

Tepid Water Too Hot Troubleshooting

Troubleshooting steps for when tepid water is too hot.

Tepid Water Too Cold Troubleshooting

Troubleshooting steps for when tepid water is too cold.

Servicing and Replacement of Parts

Surface High Limit Cut-Off Replacement

Steps to replace the surface-mounted high limit cut-off switch.

Immersion High Limit Cut-Off Replacement

Steps to replace the immersion high limit cut-off switch.

Single Phase Heating Element Replacement

Procedure to replace a single-phase heating element.

Three Phase Heating Element Replacement

Procedure to replace a three-phase heating element.

Element Jumper Configuration Guide

Diagrams for 1-phase and 3-phase element jumper configurations at various voltages.

Immersion Thermostat Replacement

Steps to replace the immersion thermostat.

Magnetic Contactor Replacement (3-Phase)

Procedure to replace the magnetic contactor for 3-phase units.

Relief Valve Replacement Procedure

Steps to replace the relief valve assembly.

Mixing Valve Replacement

Procedure to replace the mixing valve.

Mixing Valve Recalibration Steps

Steps to recalibrate the mixing valve for correct temperature output.

Element Specifications Charts

Single Phase Element Chart

Chart listing single-phase element part numbers, power, length, and resistance.

Three Phase Element Chart

Chart listing three-phase element part numbers, length, and resistance.

Hubbell EMV Specifications

General IconGeneral
CategoryWater Heater
BrandHubbell
ModelEMV
Element TypeScrew-in
Terminal TypeScrew
Thread Size1 inch NPT

Related product manuals