A DJ & DG MANUAL
13 of 34 May 12 R2
When the chimney and flue cap are provided by others, install in accordance with the instructions for the
chimney and flue cap and to the requirements of the authorities having jurisdiction. The chimney shall
have a temperature rating equivalent to “A” vent and be suitable for outdoor installation. Support the
chimney independent of the unit.
DUCT FURNACE INSTALLATION
A Duct Furnace is an indirect fired furnace without the fan. If a duct furnace is connected to a return air
duct or any other inlet air restriction, the duct furnace shall be installed on the positive pressure side of the
air-circulating fan. The airflow at the heater shall be suitably measured and shall be adjusted to within
± 10% of the stated airflow on the nameplate.
Duct Furnaces shall be installed with inlet duct that provides air distribution equivalent to a straight run of
duct having the same cross-sectional area as the inlet connection and not less than 2 equivalent diameters
in length.
Removable air tight access panels shall be provided on both the upstream and downstream sides of the
duct furnace. The access panels shall be accessible when the appliance is installed for service and shall
be sized to allow observation of smoke or light inside the casing to indicate the presence of leaks in the
heat exchanger.
PIPING, ELECTRICAL OR CONTROL SERVICE CONNECTIONS
DO NOT install anything that will interfere with equipment access or the rating plate.
Engineered Air equipment is constructed with cabinet and floors designed to prevent water from entering
the building through the installed unit. When ordered, factory installed pipe chases and/or electrical chases
are built into the unit floor. Factory chases are provided with covers that need to be replaced and sealed
after piping and electrical connections are made.
THE FLOOR OF THE UNIT HAS BEEN MADE WATER-RESISTANT. DO NOT CUT OR DRILL HOLES
IN THE FLOOR OR USE PENETRATING FASTENERS.
All penetrations through the unit walls must be caulked and sealed to prevent air and/or water from
entering the unit.
ELECTRICAL INSTALLATION
DO NOT install anything that will interfere with equipment access or the rating plate.
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