MORTEX E30 SERIES - User Manual

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MORTEXPRODUCTSINC FORTWORTH,TX76106 Page1

USERS INFORMATION MANUAL

DOWNFLOW For Installation In:

SINGLE AND TWO STAGE

1. Manufactured (Mobile) Home 2. Recreational Vehicle

ELECTRIC FURNACE 3. Modular Homes & Buildings 4. Residential Homes

MODELS: E30 SERIES

LIST OF SECTIONS – USERS INFORMATION MANUAL

1 – General 1 4 – Start Up & Shutdown Instructions 4

2 – Safety 2 5 – Owner Maintenance 4

3 – Owners Information & Seasonal Information 3

LIST OF SECTIONS – SERVICE AND MAINTENANCE MANUAL

1 – Safety 7 5 – Trouble Shooting 10

2 – Furnace Maintenance 8 6 – Blower Performance 12

3 – Furnace Controls 9 7 – Accessories and Replacement Parts Lists 16

4 – Sequence of Operation 9 8 – Replacement Parts 17

LIST OF FIGURES

1 – Circuit Breaker Locations 3 9 – Component Locations 9

2 – Return Air Louvered Door Air Filter Location 5 10 – Constant Torque Motor Terminal Locations 10

3 – Return Air Louvered Door Air Filters 5 11 – Heater Contactor Terminal Designations 11

4 – Coil Cabinet Top Pleated Filter Location 6 12 –

Blower Mounting Plate and Screw Locations 11

5 – Coil Hanging Filter Location 6 13 – Replacement Parts Drawing 1/3 HP Constant Torque Motor 17

6 – Replacing the Coil Cabinet Front Door 6 14 – Replacement Parts Drawing 1/2 HP Constant Torque Motor 18

7 – Control Box Cover 8 14 – Replacement Parts Drawing 3/4 HP Constant Torque Motor 19

8 – Blower Assembly and Mounting Screw Location 8

LIST OF TABLES

1 – Constant Torque Motor Terminal Connections 11 6 - Accessory Parts List 16

2 – Blower Performance 1/3 HP – Constant Torque Motor 12 7 – Replacement Parts List 1/3 HP – Constant Torque Motor 17

3 – Blower Performance 1/2 HP – Constant Torque Motor 13 8 – Replacement Parts List 1/2 HP – Constant Torque Motor 18

4 – Blower Performance 1/2 HP – Constant Torque Motor 14 9 – Replacement Parts List 3/4 HP – Constant Torque Motor 19

5 - Blower Performance 3/4 HP – Constant Torque Motor 15

CONTACT INFORMATION

501 Terminal Rd www.mortx.com

Fort Worth, TX 76106

SECTION I: GENERAL

The following list includes important facts and information regarding

the electric furnace and its inclusions.

1. Furnace is rated at 240 volts AC at 60 Hertz

2. Furnace is the same cabinet size for all models

3. All furnaces are equipped with a blower for A/C or Heat Pump

operation.

4. This furnace is designed for downflow and horizontal

application.

5. This furnace must not be operated without furnace door

installed.

NOTE: This furnace and its components listed on the A/C and Heat

Pump equipment sticker were listed in combination as a system by

ETL for the United States.

BLOWER MOTOR SPEED TAP INFORMATION

The constant torque motor is designed with 5 speed taps. The speed

taps are designed to be used as shown below:

Tap 5 is used for HIGH SPEED Cooling operation.

Tap 4 is used for MED-HIGH SPEED Cooling or Heating operation.

Tap 3 is used for MEDIUM SPEED Cooling or Heating operation.

Tap 2 is used for MED-LOW SPEED Heating operation.

Tap 1 is used for LOW SPEED Constant Circulation operation

ONLY. This speed tap circulates around 200 CFM and is energized

by the “G” thermostat terminal. Tap 1 does not circulate enough air

to support the heating or cooling operation. If used for cooling the

evaporator coil will freeze up. If used for heating the limits will open

very quickly.

USERS MUST READ ALL INSTRUCTIONS IN THIS

MANUAL AND THIS MANUAL MUST BE SAVED FOR

FUTURE REFERENCE

FIRE OR ELECTRICAL HAZARD

Failure to follow the safety warnings exactly could result in

serious injury, death, or property damage.

A fire or electrical hazard may result causing property

damage, personal injury or loss of life.

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Summary

General Information

Blower Motor Speed Tap Usage

Details blower speed tap usage for cooling and heating operations.

Safety Precautions

General Safety Requirements

Outlines essential safety precautions for furnace operation and installation.

Signal Word Definitions

Explains the meaning of signal words used to indicate potential hazards.

Hazard Warnings Explained

Details fire and electrical hazards from improper use or maintenance.

Owner Information and Seasonal Guidance

Furnace Operation Overview

Explains the downflow furnace operation cycle for heating.

Periodic Furnace Inspection

Provides a monthly visual inspection checklist for homeowners.

Role of the Service Technician

Emphasizes the importance of qualified technicians for furnace maintenance.

Warranty Terms and Exclusions

Details homeowner responsibilities and specific warranty exclusions.

Start-Up and Shutdown Procedures

Pre-Operation Safety Checks

Lists critical checks to perform before powering on the furnace.

Appliance Start-Up Guide

Step-by-step instructions for safely starting the furnace.

Appliance Shutdown Guide

Step-by-step instructions for safely shutting down the furnace.

Owner Maintenance Guidelines

Return Air Filter Replacement

Instructions for replacing filters located in the return air grille.

Coil Cabinet Filter Replacement

Instructions for replacing filters in the coil cabinet top.

This document is a comprehensive Users Information Manual for the Mortex Products Inc. Downflow Single and Two Stage Electric Furnace, specifically for the E30 Series models. It provides detailed instructions for installation, operation, maintenance, and troubleshooting, ensuring safe and efficient use of the appliance. The furnace is ETL listed for installation in Manufactured (Mobile) Homes, Recreational Vehicles, Modular Homes & Buildings, and Residential Homes.

Function Description

The electric furnace is designed to provide heating for residential and mobile home applications. It operates on 240 volts AC at 60 Hertz and is equipped with a motor time delay, transformer, circuit breakers, and a blower assembly. When the thermostat calls for heat, 24 VAC is sent to energize relays, which in turn send 240 VAC through limit switches to electric heaters, causing them to heat up. The indoor fan motor then energizes on a low-speed tap, drawing cool air from the living spaces, passing it over the heater coils, and circulating warmed air through the ductwork. The blower also supports air conditioning or heat pump operation. The furnace is designed for downflow and horizontal applications and must not be operated without the furnace door installed.

Important Technical Specifications

Voltage: 240 volts AC, 60 Hertz.
Blower Motor: The furnace utilizes a constant torque motor with 5 speed taps, designed for various operations:
- Tap 5: HIGH SPEED Cooling
- Tap 4: MED-HIGH SPEED Cooling or Heating
- Tap 3: MEDIUM SPEED Cooling or Heating
- Tap 2: MED-LOW SPEED Heating
- Tap 1: LOW SPEED Constant Circulation ONLY (circulates ~200 CFM, not sufficient for heating/cooling to prevent coil freeze-up or limit trips).
Heater Amperage (240 VAC):
- 4 kW Heater: 16.7 amps
- 5 kW Heater: 20.8 amps
- 6 kW Heater: 25.0 amps
Heater Configuration:
- 6 kW model: one 6 kW heater element.
- 8 kW model: one heater with two 4 kW elements.
- 10 kW model: one heater with two 5 kW elements.
- 12 kW model: one heater with two 6 kW elements.
- 15 kW model: one heater with two 5 kW elements (top heater) and one 5 kW element (bottom heater).
- 20 kW model: one heater with two 5 kW elements (top heater) and one 5 kW element (bottom heater).
Blower Motor FLA:
- 1/3 HP Motor: 2.8
- 1/2 HP Motor: 4.3
- 3/4 HP Motor: 6.8
Controls: Includes limit controls for each heater element (155°F), heater contactors (24 VAC coil), cooling and heating time delays (factory programmed, non-adjustable), circuit breakers for over-current protection of electric heaters (not for transformer, 24 VAC circuit, or blower motor), and a 3 Amp fuse for 24 VAC circuit protection.
Transformer: Steps down 240 VAC to 24 VAC for system control.
Thermostat Circuits:
- "G" Circuit: Constant circulation only (approx. 200 CFM).
- "Y" Circuit: Cooling or high-speed indoor fan operation.
- "W" Circuit: Heating indoor fan blower operation (Med-low or Medium speed).
Two-Stage Heating (12 kW, 15 kW, 20 kW models): Requires a thermostat with a "W2" feature. The second stage heater is enabled when room temperature falls more than 3 degrees below the set point, and de-energizes when within 1 degree of the set point.

Usage Features

Downflow and Horizontal Application: The furnace is designed for flexible installation in these orientations.
Continuous Blower Operation: The thermostat's manual fan switch can be set to "On" or programmed for continuous fan operation, energizing the blower motor after a time delay.
Intermittent Blower Operation (Cooling/Heating): In "Auto" mode, the blower operates only when there is a call for heat or cooling, with ON and OFF time delays.
Safety Shutoff Devices: Equipped with safety devices to shut off electric heaters in case of malfunction, preventing overheating.
Air Filters: The manual details the location and replacement procedures for return air louvered door air filters (20" x 20" x 1") and coil cabinet top air filters (20" x 24" x 1" or 20" x 24" x 2" pleated). Filters are disposable and should not be cleaned and reused. Flow arrows on pleated filters must point towards the coil.
Component Locations: Figures are provided to illustrate the location of circuit breakers, control box covers, 3 amp fuse, blower assembly, motor mounting screws, and heater contactor terminals, aiding in understanding the furnace layout.

Maintenance Features

Annual Service: The interior sections of the furnace must be cleaned and adjusted annually by a qualified service contractor. This includes checking the blower wheel and motor, electric heaters, electrical components, duct systems, wiring, evaporator coil, and condensate drain pan for dirt, debris, wear, or damage.
Homeowner Maintenance: Homeowners are responsible for basic maintenance, including:
- Periodic routine cleaning of exterior surfaces.
- Cleaning dust from louvers in the return air door.
- Monthly inspection and replacement of air filters.
- Visual examination of the furnace for physical support, casing deterioration, and sound duct connections.
Troubleshooting Guide: Provides checks for common issues like a "no heat" situation, including verifying circuit breakers, fuses, external switches, and wiring connections. It also includes detailed constant torque motor checks for both heating and cooling modes, covering voltage presence at terminals and motor connections.
Replacement Parts Lists: Comprehensive tables (Table 6, 7, 8, 9) provide part numbers for accessories and replacement components for various models (1/3 HP, 1/2 HP, and 3/4 HP constant torque blower motors), including blower motors, housings, mount bands, heater contactors, transformers, circuit breakers, limit switches, heater elements, ground lugs, fuse holders, and fuses.
Safety Warnings: Emphasizes the importance of qualified service personnel for any adjustments, service, or maintenance beyond basic cleaning and filter replacement. Warns against storing flammable materials or cleaning chemicals near the furnace and blocking airflow. Stresses disconnecting electrical power before any service and avoiding contact with moving parts or non-insulated electrical components.

This manual serves as a critical resource for both users and qualified service technicians, ensuring the safe, efficient, and long-lasting operation of the Mortex Products Inc. electric furnace.