• This manual provides information for correct installation procedures and electrical connections for Steffes ETS
Double Loop Furnaces, Models DLF30B and DLF40B. The information in this manual will help you utilize the
product's many features and ensure many years of safe, reliable operation. Read all the information contained
within this manual before installing the system. Store this manual in a safe place for future reference.
• Assembly of and/or service to these units should be performed only by a qualified electrician in accordance with
information contained herein and in accordance with national, state, and local electrical codes.
• This manual must be retained by new owners if ownership of the furnace changes.
• Any deviation from these instructions may void the warranty and could result in hazardous operating conditions.
• The warranty registration card provided as part of the unit documentation set must be completed and returned to
Steffes Corporation. Failure to do so may adversely affect warranty claims.
• Record the serial number and model number in the spaces provided on the back page of this manual. These
numbers are located on the right side of the furnace base, on the shipping box, and on the warranty registration
card. Retain this manual for a quick reference to these numbers.
•
DISCLAIMER:
In compiling this manual, Steffes Corporation has used its best judgement based upon infor
mation available but disclaims any responsibility or liability for any errors or miscalculations contained herein, or
any revisions hereof, or which result, whole or in part, from the use of this manual or any revisions hereof.
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General Information
GENERAL OPERATION
The Steffes ETS Double Loop Central Furnace (DLF) utilizes offpeak electricity which is available during
times of the day or night when the power company can supply electricity more economically. By using this off
peak electricity for heating, the power company may offer a special incentive such as a reduced electric rate,
an offpeak heating rate, a timeofuse (TOU) rate, or monthly credits on your heating bill.
When offpeak hours are available, the furnace converts electricity to heat which is then stored in its ceramic
brick core. The amount of heat stored in the brick core varies in relation to outdoor temperature, owner
preference, utility peak conditions, and the requirements of the space being heated. This stored heat becomes
available for space heating needs as determined by the wall thermostat that is strategically located in the living
space.
When the wall thermostat senses a need for heat, the core blower and supply blower in the furnace operate.
The core blower circulates the hot brick air and warms the heat exchanger located in the base of the furnace.
The supply air blower circulates room air through the exchanger where it is heated and then delivers it to the
conditioned space.
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