Reznor ADFH Unit Installation Manual Manual de usuario descargar pdf (Pagina 3)

Form I-ADF, P/N 131805 R5, Page 3

1.2 General

Description

The information in this manual applies to Model ADF and Model ADFH in Sizes 300,

500, 700 and 1200. Both Model ADF and ADFH are direct-red makeup air heating

systems. Model ADFH is designed with a high discharge air temperature.

These systems consist of a direct-red, gas-fueled burner and a draw-through blower

housed in a weatherized cabinet. The systems may be installed either indoors or out-

doors and are available for use with either natural or propane gas.

This direct-red makeup air system provides tempered makeup air. Makeup air is

dened 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

(or cools if equipped with an evaporative cooling module) and monitors the volume and

temperature of the makeup air added to the building. The system may be used to pro-

vide ventilation in whole building or in spot applications. In whole building applications,

adding controlled makeup air will cause less inltration of dust and dirt; will eliminate

continuous backdraft in chimneys and vents; and will reduce space heating fuel costs.

1.3 Warranty

Refer to the limited warranty information on the warranty form included in the "Owner's

Envelope".

1.4 Installation

Codes

These systems are design-certied to ANSI and CSA Standards. In order to retain

certication, the installer must adhere to the installation and operation requirements

in the instruction manual. These direct-red makeup air systems are not approved for

residential use.

Installation should be done by a qualied agency in accordance with the instructions

in this manual and in compliance with all codes and requirements of authorities having

jurisdiction. The qualied agency installing this system is responsible for the installa-

tion.

This direct-red makeup air system must be installed in accordance with local building

codes. In the absence of local codes, in the United States, the unit must be installed

in accordance with the National Fuel Gas Code (latest edition). A Canadian installa-

tion must be in accordance with the CAN/CGA B149.1 and B149.2 Installation Code

for Gas Burning Appliances and Equipment. These codes are available from CSA

Information Services, 1-800-463-6727. Local authorities having jurisdiction should be

consulted before installation is made to verify local codes and installation procedure

requirements.

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 inltration rate; by

providing properly sized relief openings; by interlocking a powered exhaust system; or

by a combination of these methods. Insufcient ventilation air which results in inade-

quate dilution of the combustion products generated by the heater may create hazard-

ous concentrations of carbon dioxide, carbon 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.

Codes for Special Installations: (1) Aircraft Hangar -- Installation in an aircraft hangar

must be in accordance with the Standard for Aircraft Hangars, ANSI/NFPA 409 (latest

edition) or CAN/CGA B149 Installation Codes; (2) Public Garage -- Installation in a

public garage must be in accordance with the Standard for Parking Structures, ANSI/

NFPA 88A (latest edition) or the Standard for Repair Garages, ANSI/NFPA 88B (latest

edition) or in Canada with CAN/CGA B149 Installation Codes.

2.0 Location

Location must comply with clearances in Paragraph 4.1. Makeup air should enter at

the highest point practical. By doing this, the fresh air will entrain dust laden air at the

ceiling and move it toward the point of exhaust. Also, fresh air directed downward from

the roof or ceiling will mix with hot ceiling air resulting in improved distribution of heat

in the building.

Always introduce fresh makeup air so that it moves across the greatest distance within

the room or building before reaching an exhauster.

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