EemaX EX144 TC - User Manual

ELECTRIC INSTANTANEOUS WATER HEATER
INSTALLATION GUIDE AND OWNERS MANUAL
IF YOU REQUIRE ANY HELP OR HAVE ANY QUESTIONS RELATING TO THE
INSTALLATION OR PERFORMANCE OF THIS HEATER, PLEASE CALL OUR
TECHNICAL SERVICE DEPARTMENT TOLLFREE : 1-800-543-6163.
HAVE THE INFORMATION LISTED BELOW BEFORE CALLING :
SERIAL NO. MODEL NO. EX INSTALLATION DATE
EEMAX “SERIES-TWO” WATER HEATERS
MODELS COVERED:- EX190 TC, T2 - 240/208 V
EX144 TC, T2 - 240/208 V
EX1608 TC, T2 – 208V
EX160 TC, T2 - 277 V
EX200 TC, T2 - 277 V
READ THE GENERAL SAFETY SECTION BEGINNING ON THE INSIDE COVER
AND THEN THIS ENTIRE MANUAL BEFORE INSTALLING OR OPERATING THIS
WATER HEATER. IF YOU DON’T FOLLOW THE SAFETY RULES, THE UNIT WILL
NOT OPERATE PROPERLY AND IT COULD CAUSE DEATH, SERIOUS BODILY
INJURY AND/OR PROPERTY DAMAGE. READ ALSO THE ENCLOSED
WARRANTY CARD. WARRANTY OF THIS WATER HEATER WILL DEPEND ON
PROPER INSTALLATION AND OPERATION. THE WARRANTY SHALL BE VOID IF
THE DESIGN HAS BEEN ALTERED IN ANY WAY WHATSOEVER. THE
MANUFACTURER OF THIS HEATER WILL NOT BE LIABLE FOR ANY DAMAGES
BECAUSE OF FAILURE TO COMPLY WITH THE INSTALLATION AND
OPERATING INSTRUCTIONS OUTLINED ON THE FOLLOWING PAGES.
THE INSTALLATION MUST CONFORM WITH THE INSTRUCTIONS IN THIS
MANUAL; ELECTRIC COMPANY RULES; AND THE LOCAL CODES, OR IN
THE ABSENCE OF LOCAL CODES, WITH THE LATEST EDITION OF THE
NATIONAL ELECTRICAL CODE. THIS PUBLICATION IS AVAILABLE FROM
YOUR LOCAL GOVERNMENT OR PUBLIC LIBRARY OR ELECTRIC COMPANY
OR BY WRITING UNDERWRITERS LABORATORIES, 333 PFINGSTEN ROAD
NORTHBROOK, IL, 60062.
WARNING
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Summary

General Safety

Mounting the Unit

Plumbing Hook-Up

Electrical Hook-Up

Commissioning Your Heater

T MODELS

Steps for commissioning Eemax "T" models, including indicator lights and temperature adjustment.

T2 MODELS

Commissioning steps for "T2" models, focusing on indicator lights and temperature adjustments.

T and T2, TC Models Temperature Adjustment

Guidance on adjusting temperature for "T", "T2", and TC models via adjustment screws.

ALL HEATERS - Flow Rate Control

Method for controlling cold water flow to faucets for optimal heater performance.

Troubleshooting

SYMPTOM A: NO HEAT - INDICATOR LIGHT OFF

Identifies common causes and solutions for no heat or off indicator light issues.

SYMPTOM B: NO HEAT OR LOW TEMPERATURE WITH INDICATOR LIGHT ON

Addresses issues of no heat or low temperature when the indicator light is on.

Replacement Parts Diagram

Circuit Board Diagram

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

This document is an installation guide and owner's manual for the Eemax "Series-Two" Electric Instantaneous Water Heaters. It provides comprehensive instructions for the safe and proper installation, operation, and maintenance of these units.

The Eemax "Series-Two" heater is designed to provide instant hot water, making it suitable for various domestic applications. It is specifically engineered to heat cold water to temperatures appropriate for normal household use, up to a maximum of 140°F (60°C). To optimize performance and energy efficiency, the unit should be installed as close as possible to the point of use.

Function Description:

The Eemax "Series-Two" water heater operates on an instantaneous heating principle, meaning it heats water on demand rather than storing it in a tank. This design ensures a continuous supply of hot water and eliminates standby heat loss associated with traditional tank-type water heaters. The unit is equipped with two dedicated independent circuits, requiring correctly rated wires and circuit breakers for proper electrical hook-up. It features a flow switch that activates the heating elements when water flow is detected, and a thermostat that modulates power to maintain the desired water temperature.

Usage Features:

• Instant Hot Water: Provides hot water on demand, eliminating the need to wait for a tank to refill or reheat.
• Energy Efficiency: Heats water only when needed, reducing energy consumption compared to tank-style heaters.
• Compact Design: Its small footprint allows for installation in tight spaces, such as directly beneath a sink, maximizing usable space.
• Temperature Control: The unit allows for temperature adjustment, enabling users to set the desired hot water temperature. For "T" and "T2" models, the temperature can be adjusted using a screw, with an indicator light pulsing to signify that the desired temperature is being maintained.
• Flow Rate Management: The outlet ball valve can be used to gradually reduce water flow, allowing for fine-tuning of the water temperature. Increasing the water flow above the thermostatic control's effective rate will reduce the water temperature.
• Single Lever Faucet Compatibility: For optimal control with single-lever mixer type faucets, it is recommended to restrict the cold water supply to the faucet to match the hot water flow rate from the Eemax heater.
• Safety Features: Includes an ECO (High Limit Thermostat) that trips if the temperature exceeds a safe limit, requiring a manual reset. The unit also emphasizes the importance of proper grounding to prevent electrical shock.

Maintenance Features:

• Element Replacement: The manual provides instructions for checking if an element is burned out using an ohmmeter. If a replacement element is needed, Eemax should be contacted. The design allows for easy element replacement, requiring a minimum of 8 inches of clearance above the unit.
• Inlet Filter Screen: The unit includes an inlet filter screen to prevent debris from entering the heater. Users are advised to check and clear this screen if there is no or low water flow.
• Isolation Valves: The installation requires isolating valves (full flow ball valve type) on both the inlet and outlet pipes. These valves allow the unit to be isolated from the plumbing system for maintenance purposes without affecting the rest of the water supply.
• Troubleshooting Guide: The manual includes a comprehensive troubleshooting section to help users diagnose and resolve common issues such as no heat, low water flow, incorrect power supply, or element failure. This section guides users through checks like verifying electrical supply, water flow, and thermostat settings.
• Electrical Safety: Emphasizes the critical importance of turning off the main circuit breaker before any electrical work or servicing to prevent electrical shock.
• Air Purging: Before commissioning the heater, it is crucial to purge all air from the hot water circuit by opening all hot water outlets until the water flow is continuous and free from air pockets. This prevents premature failure of the heating elements.
• Leak Detection: After plumbing is complete, the system must be thoroughly checked for water leaks at all connections before connecting the electrical supply.
• Warranty: The warranty of the water heater is dependent on proper installation and operation, and it will be void if the design is altered in any way. The manufacturer is not liable for damages resulting from non-compliance with installation and operating instructions.
• Technical Support: A toll-free technical service department number is provided for assistance with installation or performance issues, along with a request to have serial number, model number, and installation date ready when calling.

EemaX EX144 TC Specifications