ICP EF12F1900A - User Manual

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Summary

Safety Labeling and Signal Word Meanings

Hazard Level Definitions

Explains hazard levels and meanings of DANGER, WARNING, CAUTION signal words.

Signal Word Usage in Manuals and Labels

Details usage of WARNING and CAUTION signals within the manual and on product labels.

Installation Guidelines and Safety

Installation Safety and Code Compliance

Covers hazards from unqualified persons and the importance of adhering to codes.

Unit Location and Fire Hazard Prevention

Guidance on selecting unit position and maintaining clearances for fire prevention.

Unit Installation Positions and Configurations

Upflow, Downflow, and Vertical Setup

Unit setup for upflow and requirements for downflow configurations.

Horizontal Airflow and Drain Pan Installation

Cabinet orientation for horizontal airflow and drain pan installation requirements.

Closet and Suspended Installation Methods

Closet installation for return air and methods for suspending the unit.

Duct Connection Procedures

Procedures for attaching supply and return ducts to the unit.

Filter Installation and Airflow Data

Internal Filter Installation

Information on field-supplied filters and installation procedures.

Condensate Drainage and Refrigerant Lines

Condensate Drain System Setup

Details on connecting primary/secondary drains, traps, and pumps for condensate.

Restrictor Orifice and Refrigerant Line Connection

Procedures for selecting/changing restrictor orifice and connecting refrigerant lines.

Electrical Wiring, Controls, and No Heat Kit

Electrical Safety and High Voltage Wiring

Covers electrical shock hazards, wiring requirements, and grounding.

Low Voltage Controls and No Heat Kit Installation

Details on low voltage connections, transformer, and installing the no-heat kit.

Blower Performance and Maintenance

Blower Motor Speed and Airflow Check

How to change motor speed and perform an airflow check using static pressure.

Routine Unit Maintenance Procedures

Guidelines for filter cleaning, lubrication, and condensate drain checks.

Operational Sequences and Limit Controls

System Sequence of Operation Modes

Explains operational modes for Electric Heat, Cooling Only, and Heat Pump.

Temperature Limit and Lockout Operation

Details how temperature limits affect operation and lockout conditions.

Replacement Parts Identification

Component Location Diagram

Diagram showing the location of various replacement parts within the unit.

This document describes the installation, operation, and maintenance of an Electric Furnace, specifically models EF08B1500A1, A2, EF12F1900A, EF16J2200A, and EF20N2600A, which can be used with an AMF001NHA Accessory No Heat Kit.

Function Description

The Electric Furnace serves as a blower cabinet that can function as an electric furnace, or for cooling or heat pump operation, with or without electric heat. It is designed for residential heating and cooling applications, providing conditioned air throughout a building. The unit's primary function is to circulate air and, when equipped with electric heaters, to provide warmth. It can be installed in various orientations: upflow, downflow, or horizontal.

Important Technical Specifications

Models and Compatibility:

EF08B1500A1, A2
EF12F1900A
EF16J2200A
EF20N2600A
Compatible with AMF001NHA Accessory No Heat Kit for non-heating applications.

Electrical Specifications (No Heat Kit AMF001NHA):

Voltage: 240V or 208V
Phase: 1
Hertz: 60
Supply Circuit No.: Single
Motor AMPS: 6.0
Total AMPS: 6.0
Ampacity: 7.5
Maximum Overcurrent Protective Device (AMPS): 15
Recommended Supply Wire (75°C Copper): No. 2, Size 14 (for 240V up to 104 ft, for 208V up to 90 ft)
Ground Wire: No. 1, Size 14

Clearances (from combustible materials):

No Heaters:
- All Sides: 0"
- From Supply Duct: 0"
- Recommended Service From Front (for blower, filter if installed): 20"
With Heaters:
- All Sides: 0"
- From First Three Feet of Supply Duct to Combustibles: 1"
- From Duct after Three Feet: 0"
- Recommended Service From Front (for blower, filter, heaters if installed): 20"

Drain Connections:

Main and Overflow Drains: 3/4" NPT (National Pipe Thread).
Condensate drain lines must be at least 3/4" PVC or equivalent.
A trap is required in the drain line below the bottom of the drain pan.
Drain lines must pitch down at least 1/4" per foot.
Horizontal runs over 15 feet require an anti-siphon air vent (stand pipe).
For downflow installations, a secondary overflow drain connection is mandatory to prevent water damage to electrical components.

Airflow Performance (CFM) - Based on no coil, no filter, no electric heat (deductions apply for these components):

EF08 (SP IN. WG. 0.3 - 1.0):
- LOW: 230V (1053-552 CFM), 208V (863-381 CFM)
- MED: 230V (1333-743 CFM), 208V (1156-618 CFM)
- HIGH: 230V (1553-865 CFM), 208V (1394-774 CFM)
EF12 (SP IN. WG. 0.3 - 1.0):
- LOW: 230V (1103-803 CFM), 208V (903-642 CFM)
- MED: 230V (1498-1044 CFM), 208V (1246-906 CFM)
- HIGH: 230V (1860-1178 CFM), 208V (1602-1096 CFM)
EF16 (SP IN. WG. 0.3 - 1.0):
- LOW: 230V (1103-749 CFM), 208V (872-530 CFM)
- MED: 230V (1500-993 CFM), 208V (1229-798 CFM)
- HIGH: 230V (1912-1154 CFM), 208V (1629-1058 CFM)
EF20 (SP IN. WG. 0.3 - 1.0):
- LOW: 230V (1673-1081 CFM), 208V (1320-576 CFM)
- MED: 230V (2060-1444 CFM), 208V (1676-683 CFM)
- HIGH: 230V (2554-1606 CFM), 208V (2420-1558 CFM)

Filter Static Pressure Drop (CFM):

EF08 (14x20): 0.05 (600 CFM) to 0.19 (1200 CFM)
EF12 (18x20): 0.09 (800 CFM) to 0.22 (1400 CFM)
EF16 (20x20): 0.12 (1200 CFM) to 0.19 (1800 CFM)
EF20 (25x20): 0.09 (1200 CFM) to 0.18 (2000 CFM)

Usage Features

Installation Flexibility:

Upflow: Unit can be installed directly without modifications, supported only on the bottom.
Downflow: Requires a subbase kit for proper clearances and coil support.
Horizontal: Requires a horizontal kit for proper coil support and drain pan. Can be installed in left or right airflow configurations.
Suspended: Can be suspended using metal strapping or threaded rod with angle iron supports, running parallel to the cabinet length.
Non-Ducted Return Air Closet: Can be installed in a closet with a false bottom or on an open platform, ensuring adequate free return airflow. Local codes may restrict this for single-story dwellings.

Coil and Filter Integration:

Units are not shipped with air filters; these must be field-supplied (washable or disposable). Washable filters are available as an accessory.
Internal filters are accessible via a separate filter door. If access is difficult, a remote filter is recommended.
Horizontal installations with a coil require a horizontal drain pan kit. A field-fabricated auxiliary drain pan with a separate drain is required for installations over finished living spaces or areas susceptible to water damage.

Refrigerant System:

A restrictor orifice is located at the distributor, with the factory-installed orifice identified on the unit rating plate. The orifice may need to be changed based on outdoor unit specifications for optimal performance.
Refrigerant lines should be sized according to outdoor unit information and routed to avoid obstructing service access or filter removal.

Electrical Connections:

All electrical work must conform to local codes and NFPA 70.
A disconnect switch must be located within sight of the unit.
Line voltage power supply (208V-240V) from a separate 15 amp circuit is required for the No Heat Kit.
Low voltage control connections (24V) are prewired. The transformer can be rewired for 208V if needed.
Grounding requires a copper conductor (#14AWG) from the unit to a grounded service panel or ground rod.

Airflow Adjustment:

The blower motor comes factory-wired for medium or high speed. Speed can be changed by reconnecting the black wire at the blower motor terminal block to the desired speed tap.
Airflow should be between 350 and 450 CFM per ton of cooling capacity. External static pressure measurements are used to determine the correct motor speed tap.

Safety Features:

Limit Operation: The temperature limit responds to over-temperature conditions. If the limit trips, electric heater relays de-energize and the fan relay energizes. After resetting, normal operation resumes. Multiple trips can lead to a soft lockout (heater relays disabled, fan responds to thermostat) or a hard lockout (fan locked on, heater relays disabled), requiring power cycling to clear.
Overcurrent Protection: Supply wiring must have overcurrent protection (fuses or circuit breakers).

Maintenance Features

Filter Maintenance:

Filters must be cleaned when dirty, inspected at least monthly. Cleaning frequency depends on operating hours and atmospheric conditions. Clean filters maintain high unit efficiency.

Lubrication:

The blower motor bearings are permanently lubricated and do not require additional lubrication.

Condensate Drains:

During the cooling season, check drain lines to ensure condensate flows from the primary drain, not the secondary drain.
If condensate flows from the secondary drain, the unit should be shut off, and the condensate pan and drains cleaned to ensure a free-flowing primary drain.

General Maintenance: