Evcon EB17B - User Manual

Need help?

Do you have a question about the Evcon EB17B and is the answer not in the manual?

Summary

General Information and Codes

EB Furnace Notes

Key facts and inclusions for the EB furnace model series.

Installation Codes

Required adherence to national, local, and state electrical and building codes.

Location Requirements

Specifies minimum clearances for furnace placement and servicing access.

Furnace Clearances

Details required clearances around the furnace for safe operation and ventilation.

Return Air Requirements

Specifies minimum free area openings for proper air circulation and furnace performance.

Duct System Design

Downflow Furnace Duct Connector

Instructions for installing the redesigned duct connector for downflow applications.

Duct Connectors (7990 Series)

Duct Connector Dimensions

Illustrations and specifications for duct connector sizes and types.

Duct Connector Installation

Screw Attachment Duct Connector Installation

Step-by-step guide for installing the screw attachment duct connector.

Tab Attachment Duct Connector Installation

Step-by-step guide for installing the tab attachment duct connector.

Furnace Installation and Upflow Conversion

Furnace Installation Procedure

Steps for physically mounting and securing the furnace to the duct connector and structure.

Upflow Application Conversion

Instructions for converting the furnace from downflow to upflow configuration.

Wiring and Electrical Data

Wiring Requirements

General wiring guidelines, wire sizing, and adherence to electrical codes.

Electrical Data Tables

Tables detailing electrical specifications, load calculations, and wire sizes for models.

Thermostat Installation

Thermostat Placement and Settings

Guidance on thermostat placement, settings, and wiring to the furnace.

Thermostat Wiring Schematic

Diagram illustrating thermostat wiring for blend air and furnace connections.

Optional Air Conditioning

AC;Heat Pump Accessory Kits

Information on adding air conditioning or heat pump systems to the furnace.

Blower Accessories and Wiring Diagrams

High Performance Blower Package

Details on an accessory blower package for increased capacity.

Furnace Wiring Diagrams

Schematics for various EB series furnace models and their electrical connections.

Repair Parts List

Component Identification

Illustrated list of replacement parts for EB series furnaces with corresponding part numbers.

Field Fix Kits Information

Information on specific field fix kits for earlier manufactured EB12 and EB15 models.

This document is an installation manual for Downflow/Upflow Electric Furnaces, specifically the EB Series models. It provides comprehensive instructions for the proper installation, operation, and maintenance of these units, emphasizing safety and compliance with various codes.

Function Description:

The EB Series electric furnaces are designed for both downflow and upflow applications, providing heating for residential spaces. They are equipped with a blower and control system that makes them ready for add-on air conditioning and heat pump systems. The furnaces utilize electric heating elements to generate warmth, and their internal components are protected by circuit breakers. The design allows for flexible installation, including in closets or alcoves, with specific clearance requirements to ensure proper airflow and accessibility for servicing. The manual also details how to convert the furnace from a downflow to an upflow configuration, expanding its versatility.

Important Technical Specifications:

The manual provides detailed electrical and blower performance data for various EB Series models (EB10B, EB12B, EB15B, EB17B, EB20B, EB23B).

Electrical Data (Table 4):

Voltage: Rated at 240 volts, 60 Hz, single phase.
D.O.E. Output Capacity: Ranges from 34,000 BTU (EB10B) to 77,000 BTU (EB23B) at 240 VAC.
KW Output: Ranges from 10.0 KW (EB10B) to 22.6 KW (EB23B) at 240 VAC.
Element Capacity @ 240 VAC: Ranges from 9.6 KW / 40.0 AMPS (EB10B) to 21.6 KW / 90.0 AMPS (EB23B).
Motor AMPS @ 240 V: 4.0 Maximum for all models.
Circuit Load AMPS @ 240 V: Varies by model and circuit (e.g., EB10B: CKT 1 - 44.0, CKT 2 - N/A; EB23B: CKT 1 - 47.3, CKT 2 - 46.7).
Wire Size (75°C Copper): Specified for single and dual branch circuits (e.g., #6 for EB10B single branch, #6 for EB23B dual branch CKT 1).
Wire Size (60°C Copper): Specified for single and dual branch circuits (e.g., #6 for EB10B single branch, #4 for EB23B dual branch CKT 1).
Max. Fuse Size (or CB) - AMPS: Ranges from 60 AMPS (EB10B) to 125 AMPS (EB23B) for single branch, and 30-60 AMPS for dual branch circuits.
Ground Wire Size: #6 or #8 for single branch, #10 for dual branch.
Circuit Breakers: Equipped with one or two 60 amp circuit breakers for internal wiring protection and power disconnection.

Blower Performance (Table 3):

CFM (STD. Air) at various static pressures (Inches of WC):
- Low Speed Heating (EB10, 12, 15): 945 CFM at 0.0" WC down to 705 CFM at 0.8" WC.
- Medium Speed Heating (EB17, 20, 23): 1160 CFM at 0.0" WC down to 935 CFM at 0.8" WC.
- Medium High with A-Coil in place: 1340 CFM at 0.0" WC down to 876 CFM at 0.8" WC.
- High with A-Coil in place: 1573 CFM at 0.0" WC down to 1019 CFM at 0.8" WC.

Physical Dimensions (Figure 1):

Filter Size: Universal 16 x 20 x 1 for all models.
Overall Height: 51-5/8 inches (excluding sub-base).
Width: 19-5/8 inches (excluding sub-base).
Depth: Various dimensions for different sections of the unit.
Duct Connectors (7990 Series): Available in various depths (1" to 15") and styles (fingered or screw tab) to accommodate different floor-to-duct dimensions.

Usage Features:

Downflow/Upflow Convertible: The furnace is designed for downflow applications but can be converted to upflow using specific accessory kits (3500-5451* Adapter Box and/or 3500-7211* Upflow Flange Plate Kit).
A/C and Heat Pump Ready: All models are equipped with a blower and control system suitable for add-on air conditioning (up to 4 tons) and heat pump (up to 3 1/2 tons). For higher capacities (up to 5 tons A/C, 4 tons HP), an accessory blower package (3500-7901*) is required.
Thermostat Compatibility: Uses a 4-wire thermostat for heating and cooling. The manual specifies pre-set heat anticipator settings (0.4 Amps) and guidelines for thermostat placement (52 to 66 inches above the floor on an inside wall).
Duct System Design: Emphasizes designing the distribution system to match the furnace's static pressure rating for proper airflow.
Return Air Requirements: Specifies minimum free area openings for return air based on furnace type (heating only, A/C up to 4-tons, A/C up to 5-tons) and provides guidelines for return air grille placement.
Zero Clearance to Combustible Material: Approved for zero clearance to combustible material on the furnace exterior and ductwork, with specific return air clearance exceptions.
Servicing Access: Requires a minimum of 24 inches in front of the furnace for access to heating elements, controls, and blower/element removal.

Maintenance Features:

Filter Replacement: Filters are furnished with each model and are universal (16 x 20 x 1).
Safety Precautions: Emphasizes turning off electrical power at the household service box and furnace circuit breakers before any service or maintenance. Homeowners should not open the electric box door.
Field Wiring Shield: The furnace is equipped with a protective shield over field wiring connections, which must be replaced after wiring is completed to prevent electrical shock.
Customer Envelope: Contains maintenance and operating instructions to be given to the homeowner.
Repair Parts List: A detailed list of replacement parts is provided, including part numbers for thermostats, front panels, filters, blower motors, capacitors, relays, blower wheels, heater elements, transformers, sequencers, circuit breakers, and various other components. This list also indicates if parts are "Special Order" items requiring extra time for delivery.
Field Fix Kits: Specific kits (3500-7121 for EB12, 3500-7151 for EB15) are listed for units manufactured prior to August 1995, including limit baffles and limit switches.