Form I-RDF, P/N 148384 (Rev 1), Page 1
Indoor or Outdoor, Gas, Direct-Fired
Makeup Air/Heating Systems
(Specifications subject to change without notice.)
Installation Form RZ-NA I-RDF
Obsoletes Form RZ-NA 440 (Version B)
WARNING: The use and storage of gasoline or other flammable
vapors and liquids in the vicinity of this appliance is hazardous.
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don't touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
WARNING: Improper installation, adjustment, alteration,
service, or maintenance can cause property damage, injury or
death. Read the installation, operation, and maintenance
instructions thoroughly before installing or servicing this
equipment.
WARNING: Gas-fired appliances are not designed for use in
hazardous atmospheres containing flammable vapors or
combustible dust, or atmospheres containing chlorinated or
halogenated hydrocarbons. See Hazard Levels, page 2.
WARNING: On makeup air heaters which also recirculate room
air, outside ventilation air must be provided in accordance with
the information shown on the heater nameplate.
Recirculation of room air may be hazardous in the presence of:
(a) Flammable solids, liquids, and gases;
(b) Explosive materials; or
(c) Substances which may become toxic when exposed to heat.
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 system 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 ventila-
tion 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.
Applies to:
Reznor
®
Model RDF Series 3
Index .................................... Page
Belt Tension ........................................ 18
Blower Rotation ............................. 18
Blower Speed Adjustment ................. 18
Clearances ............................................. 4
Installation Codes ................................. 2
Computer Control (Field) ................... 1 5
Control Locations ................................ 1 9
Control Wiring .................................... 10
Convenience Outlet (Option) ............ 11
General Description ............................. 1
Dimensions ............................................ 4
Dirty Filter Switch (Option) ............... 1 1
Discharge Sensor (Option) ................. 1 3
Discharge Temperature
Low Limit (Freezestat Option) ....... 1 6
Disconnect Switch ............................... 1 0
Door Switch (Option) ......................... 1 3
Ductwork Sizing and Installation ..... 10
Electrical Supply and Connections .... 9
Filter Cabinets (Option) ................ 5, 24
Firestat (Option) .................................. 1 4
Gas Piping and Pressures ................... 16
HAZARD INTENSITY LEVELS ...... 3
Maintenance
............... See Form O-DV/RDF/ADF
Makeup Air ............................................ 9
Manifold Pressure ............................... 1 6
Motor Loads ....................................... 18
Mounting ............................................... 6
Operation
............... See Form O-DV/RDF/ADF
Outside Air Cutoff (Option) ............... 1 3
Outside Air Hoods (Option) ......... 5, 24
Photohelic Pressure Switch (Opt) ...... 1 5
Potentiometer (Option) ....................... 1 4
Recirculation (Option) ......................... 2
Remote Console (Option) .................. 11
Replacement Parts
.... See Form 740 or P-DVRDF/ADF
Rigging .................................................. 6
Roof Curb ............................................. 7
Pressure Null Switch (Option) .......... 14
Service ...... See Form O-DV/RDF/ADF
Smoke Detector (Option) ................... 1 6
Technical Data ...................................... 3
Uncrating ............................................... 3
Warranty ........................................... 3
®
C E R T I F I E D
Table of Contents
Paragraphs
Pages
Installation .................. 1-12 ..... 1-18
Check/Test/Start ............ 13 ... 19-24
ADDENDUM - Field-Installed
Accessories ............................ 24-28
