Reznor RDF Unit Installation Manual - Manual (Page 3)

I-RDF, PN148384R5, Page 3
1.2 General
Description
The information in this manual applies to Reznor ® Model RDF Series 3 direct-fired
makeup air heating systems. The typical system consists of a direct-fired, natural gas-
fueled burner, and a draw-through blower housed in a weatherized cabinet. The sys-
tem may be installed either indoors or outdoors.
This direct-fired makeup air system provides tempered makeup air. Makeup air is
defined as air that enters a building or area due to negative pressure created by an air
exhaust load in excess of the volume of entering air. This system warms the outside
air and monitors the volume and temperature of the makeup air added to the building.
The system may be used to provide ventilation in whole building or in spot applications.
In whole building applications, adding controlled makeup air will cause less infiltration
of dust and dirt; will eliminate continuous backdraft in chimneys and vents; and will
reduce space heating fuel costs.
This system is available with various air control options to meet a wide range of appli-
cation requirements. Depending on the air control option ordered, the supply air vol-
ume may be varied or the outside air may be supplemented with up to 75% building air
(recirculation) for increased energy savings.
These systems are designed-certified to ANSI and CSA Standards.
(NOTE: Optional
recirculation is available for U.S. installations only; recirculation is not available for
Canadian installations.)
In order to retain certification, the installer must adhere to the installation and operation
requirements in the instruction manual. These direct-fired makeup air systems are not
approved for residential use.
1.3 Warranty Refer to the limited warranty information on the warranty card included in the "Owner's
Envelope".
1.4 Installation
Codes/
Requirements
Installation should be done by a qualified agency in accordance with the instructions
in this manual and in compliance with all codes and requirements of authorities having
jurisdiction. The qualified agency installing this system is responsible for the installa-
tion.
These units must be installed in accordance with local building codes. In the absence
of local codes, the unit must be installed in accordance with the National Fuel Gas
Code ANSI Z223.1a (latest edition) or CAN/CGA B149, Installation Codes for Gas
Burning Appliances. These codes are available from CSA Information Services, 1-800-
463-6727.
Before installation, always consult authorities having local jurisdiction to verify that
local codes and procedures are being followed.
The building should always provide adequate relief for the heater to operate at its
rated capacity. It should be noted that this can be accomplished by taking into account,
through standard engineering methods, the structure's designed infiltration rate; by
providing properly sized relief openings; by interlocking a powered exhaust system; or
by a combination of these methods. Excessive recirculation or insufficient ventila-
tion air which results in inadequate dilution of the combustion products gener-
ated by the heater may create hazardous concentrations of carbon dioxide, car-
bon monoxide, nitrogen dioxide, and other combustion products into the heated
space.
If the failure or malfunction of this heater creates a hazard to other fuel burning equip-
ment in the building, interlock the system to open inlet dampers or other such devices.
Recirculation Requirements - Do not install a system with optional recirculation
(building air) in the presence of flammable solids, liquids, or gases; explosive materials
(i.e., grain dust, coal dust, gun powder, etc.); or substances which may become toxic
when exposed to heat (i.e. refrigerants, aerosols, etc.). If a system with recirculation is
being installed in an area where propane fork trucks or other fossil fuel powered equip-
ment are used, the ventilation requirements for that equipment must be met. Recir-
culation is not recommended in uninsulated buildings where outside temperatures fall
below 32°F (0°C).
If in doubt regarding an application, consult the heater manufacturer's representative
before installation.