WaterFurnace E Series

Questions and Answers

A
Amanda MendozaAug 5, 2025
What does failure indicators from controls mean for WaterFurnace Heat Pump?
- B
  Brandi LewisAug 5, 2025
  Failure indicators on your WaterFurnace Heat Pump controls can mean several things: a closed (shorted) freeze protection thermistor (replace it), an open freeze protection thermistor (ensure it's secured in the board connector, replace if needed), water reaching the freeze point setting (verify the freeze protection setting), a closed (shorted) water set point thermistor (replace it), the unit cutting out on high pressure (discharge pressure > 4137 kPa), the unit cutting out on low pressure (suction pressure < 276 kPa), or an open water set point thermistor (ensure it's secured in the connector, replace if needed).
K
Kevin NicholsAug 25, 2025
How to fix a noisy WaterFurnace Heat Pump?
- S
  sgonzalesAug 25, 2025
  A noisy WaterFurnace Heat Pump could be caused by several factors. Check the compressor for loosened mounting bolts. Inspect for tubing contact with the compressor or other surfaces, and readjust it if necessary. Ensure that all panel screws are tight. Look for chattering or humming in the contactor or relays, which could indicate low voltage or a defective holding coil (replace the component if needed). Verify proper installation of vibration absorbing material, ensuring the unit is fully supported. Also, check for abnormally high discharge pressures.
F
fcunninghamNov 14, 2025
Why WaterFurnace Heat Pump compressor won't run?
- R
  Ryan BergerNov 14, 2025
  The compressor of your WaterFurnace Heat Pump might not be running due to several reasons: a blown fuse or open circuit breaker (check and replace if necessary after correcting the fault), low supply voltage (check with a volt meter), a faulty remote control system (check wiring, setting, calibration of the aquastat, or a burnt-out 24-volt transformer). Also, check for loose or broken wires (tighten or replace), a tripped low pressure switch (check for issues like fouled heat exchangers or low water flow), a tripped high pressure switch (check for fouled heat exchanger or high water temperature), an open compressor overload protection (allow compressor to cool or replace if defective), a grounded compressor motor winding (replace the compressor), or an open compressor winding (check contin...

Summary

General Installation Information

Safety Guidance

Discusses safety warnings, advisements, and precautions for installation.

Unit Location

Guidelines for selecting an appropriate location for unit installation.

Piping and Process Water

Covers fluid piping and specific considerations for process water applications.

Mounting Units

Proper methods for mounting the unit securely and level.

Accessories and Other Options

Desuperheater

Details about the optional desuperheater coil for hot water generation.

Load-side Pump Kit

Information on field-installed pump kits for system flow requirements.

Potable Water Systems

Suggested Hookup

Diagram and notes for connecting a domestic water heater hookup.

Alternate Hookup

Illustrates an alternative method for connecting a potable water system.

Open Loop Well Water Systems

System Setup and Maintenance

Discusses maintaining water pressure, flow, and disposal of discharge water.

Typical Installation Diagram

Illustrates a typical installation for open loop systems.

Earth-Coupled Systems

Purging, Charging, and Pressure

Procedures for flushing, charging, and pressurizing closed loop systems.

Typical Installation Diagram

Illustrates a typical installation for closed loop earth-coupled systems.

Electrical Data

Unit Electrical Specifications

Table detailing voltage, RLA, LRA, FLA, and fuse/breaker sizes for EKW models.

Notes on Fuses and Pumps

Clarifications on fuse types and pump amp ratings used in the data.

Dimensional and Physical Data

Dimensional Data Table

Table showing unit dimensions and connection sizes.

Physical Elements Diagrams

Illustrations of the unit's back and front views.

Sound Data

Table listing sound ratings (dBA) for different EKW models.

Electrical and Control Box Information

Electrical Wiring Guidelines

General advice on line and low voltage wiring according to codes.

Control Box Relocation Procedure

Step-by-step instructions for relocating the unit's control box.

Schematics and Wiring Diagrams

Load Circulator Wiring

Schematic for load circulator wiring.

Dedicated Flow Center Wiring

Schematic for dedicated flow center wiring.

Multiple Unit Flow Center Wiring

Schematic for wiring multiple units to a single flow center.

External Control Methods

Primary and Secondary Modes

Explains unit control via internal or external sources.

Aquastat Wiring - Dedicated Units

Wiring diagram for aquastat control of dedicated heating/cooling units.

Aquastat Wiring - Reversible Units

Wiring diagram for aquastat control of reversible units.

Unit Staging Configuration

Staging with Primary;Secondary Mode

Wiring for staging units using primary/secondary control.

Staging with Aquastat

Wiring for staging units using an aquastat.

Pre-Powering Unit Checks

Essential checks before powering the unit for startup.

Converting to Dedicated Cooling Unit

Conversion Procedure

Step-by-step guide to convert a heating-only unit to cooling-only.

Jumper Pin Location and Settings

Explains jumper settings for heating, cooling, and reversible modes.

Unit Startup Procedures

Primary Unit Startup

Steps for starting up the unit in primary mode.

Secondary Unit Startup

Steps for starting up the unit in secondary mode.

Control Panel and Operation

Control Panel Overview

Description of the control panel display and buttons.

Configuration Menu and Set Point

Procedures for accessing and adjusting parameters and set points.

Lockout Modes

Explains different lockout conditions and their causes.

Parameter Functions and Settings

Detailed table of operational parameters and their configurations.

EKW Unit Capacity Data

Heating Capacity Tables

Comprehensive heating capacity data for all EKW models.

Cooling Capacity Tables

Comprehensive cooling capacity data for all EKW models.

Flow Rates and Pressure Drop

Source Flow Rates Table

Table showing minimum and maximum source flow rates for EKW models.

Pressure Drop Graph

Graph illustrating pressure drop across EKW units at various flows.

Troubleshooting Guide

Compressor Issues

Common problems and solutions when the compressor won't run.

Performance Issues

Troubleshooting for insufficient cooling/heating and noisy operation.

Control and Thermistor Troubleshooting

Diagnosing issues related to control modes, jumpers, and thermistors.

Preventive Maintenance

General Maintenance Practices

Keeping air out, maintaining system pressure, and checking heat exchangers.

Cleaning Procedure

Step-by-step instructions for cleaning the water-to-refrigerant heat exchanger.

Disposal and Recycling

Product Disposal Guidelines

Procedures for responsible disposal of unit components.

Valuable Recyclable Materials

Identification of recyclable materials within the unit.