Enviro HPP 16 - User Manual

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HP SERIES FAN COILS

Supersedes ET115.24-NOM1 (615)

Form ET115.24-NOM1 (519)

INTRODUCTION

E

NVIRO-TEC fan coils represent a prudent

investment which can, with proper installation,

operation, and regular maintenance, give trouble-

free operation and long service.

Your equipment is initially protected under

the manufacturer’s standard warranty;

however, this warranty is provided under the

condition that the steps outlined in this manual for

initial inspection, proper installation, regular

periodic maintenance, and everyday operation of the

equipment be followed in detail.

HP SERIES

(HPP Plenum Return Shown)

This manual s

hould be fully reviewed in advance

of any actual work being done on the equipment.

Should any questions arise, please contact your

local Sales Representative or the factory BEFORE

proceeding.

The equipment covered by this manual is available with

a vast variety of options and accessories. Consult

the approved unit submittal, order acknowledgement,

and other manuals for details on the options and

accessories provided with the equipment on each

project.

INSTALLATION, OPERATION & MAINTENANCE

Table of Contents

Questions and Answers

B
Brett CampbellAug 10, 2025
What to do if my Enviro HPP 16 Air Conditioner motor fails to start?
- D
  Deanna StewartAug 10, 2025
  If your Enviro Air Conditioner motor isn't starting, there could be several reasons. The CFM adjustment voltage may be too high (above 10.0 VDC) or too low (below 5.0 VDC). Adjust the CFM voltage accordingly. For units shipped before April 2011, ensure the voltage is between 5.1 VDC and 9.9 VDC. Also, check that the ECM cables are properly connected to the motor by unplugging and reinstalling them. If the ECM cables are damaged, replace them. A mechanical failure could also be the cause, so check if the motor rotates freely. In case of electrical failure, consider replacing the motor. Lastly, oxidized or sulfidized fan relay contacts can prevent the motor from starting, so replace the fan relay if necessary.
H
Heidi JacobsAug 17, 2025
Why does my Enviro HPP 16 motor surge?
- J
  Justin MunozAug 17, 2025
  If your Enviro Air Conditioner motor is surging, it could be due to a couple of reasons. The fan CFM adjustment voltage might be outside the range of the Fan Calibration Curve; in this case, adjust the voltage to a value within the curve's range. Another possibility is that the external static pressure (ESP) is too high. Check for any obstructions in the discharge and ensure the coil fins are clean. Make sure the plenum opening is unobstructed and that the filter, if present, isn't dirty and doesn't restrict airflow.
B
Barbara PriceAug 23, 2025
What to do if my Enviro HPP 16 motor runs in reverse or doesn’t respond to speed adjustment?
- W
  William HicksAug 25, 2025
  If the motor in your Enviro Air Conditioner runs in reverse or doesn’t respond to speed adjustments, it indicates a motor failure, and you should replace it.
M
Michael ShafferSep 1, 2025
How to fix excessive motor noise in my Enviro Air Conditioner?
- A
  Andrea FrancisSep 1, 2025
  Excessive noise from your Enviro Air Conditioner motor can stem from a few issues. Start by tightening the motor mounting bolts, as they may be loose. If the fan wheel is rubbing against the fan housing, align the wheel within the housing. Also, check if the fan wheel is loose, and if so, align and tighten it.

Enviro HPP 16 Specifications

General

Brand	Enviro
Model	HPP 16
Category	Air Conditioner
Language	English

Summary

Safety Symbols and Precautions

Safety Precautions

Covers critical safety warnings and installation guidelines.

Safety Hazards

Critical warnings for electrical shock, moving parts, and hot parts.

Rigging and Securing Precautions

Instructions for safe lifting, rigging, and securing equipment during installation.

Handling and Installation Procedures

Handling & Installation

General care, avoiding force on coils/piping, and upright positioning guidelines.

Ductwork and Electrical Connections

Ductwork Connections

Electrical Connections

Critical safety warning and guidance for electrical service and wiring.

Unit Features and System Startup

Start-Up Procedures

Essential steps and personnel qualifications for proper unit start-up.

Cooling;Heating System Startup

Inspection and Start-Up Checklist

System Balancing and Operation

Air System Balancing

Procedures for balancing air delivery and fan system conditions.

Water System Balancing

Essential knowledge for hydronic system balancing and recording conditions.

Controls Operation

Unit Weight and Heater Assembly

Electric Resistance Heater Assembly

Critical safety warning and guidance for electric resistance heaters.

Heater Operation and Safety

Critical factors for heater operation: airflow, voltage, and thermal cutouts.

Electrical Wiring and Controls

Guidance on unit wiring, controls, and the importance of verifying connections.

Electrical Calculations and Heat Charts

Electrical Calculations Information

Electric Heat Selection Chart

Chart for selecting electric heat based on MBH, kW, voltage, and unit size.

ECM Variable Speed Motor Balancing

ECM Motor Balancing Procedures

Covers commissioning, manual, and remote balancing steps for ECM motors.

ECM Motor Fan Calibration Curves

Fan Calibration Curves

Curves showing the relationship between voltage and fan capacity (CFM) for ECM motors.

Troubleshooting ECM Variable Speed Motors

ECM Specific Troubleshooting Guidelines

Common problems, causes, and solutions for ECM variable speed motors.

Checking ECM Cables

Troubleshooting ECM 3-Speed Constant Torque Motors

ECM Constant Torque Motor Troubleshooting

Addresses issues like motor start failure, surges, noise, and performance for constant torque motors.

ECM Constant Torque Motor Harness Checks

Procedure for Checking Wiring Harnesses

ECM Constant Torque Motor Connections

ECM Constant Torque Motor Wire Harnesses

Fan Coil Relay Board Troubleshooting

Relay Board Troubleshooting Guide

Checks for loose wires, voltage measurements, and correct motor power connection.

Fan Coil Relay Board Troubleshooting (Continued)

Relay Board Troubleshooting (Continued)

Verifies fan speed changes, 24V output, and jumper installation for operation.

Fan Coil Relay Board Terminal Functions

Relay Board Terminal Functions

Example Wiring Diagrams

Typical 24 VAC Control Drawing

Example Wiring Diagrams (Continued)

Wiring Diagrams for Electric Heat and Fan Control

Example Wiring Diagrams (ECM)

Wiring Diagram for ECM Motor Control

Remote Thermostat;Switch Installation

Instructions for Remote Thermostat or 3-Speed Switch

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