Roberts Gorden WHA XS Series Manuale Utente

  

All installation and service of ROBERTS GORDON

®

 equipment must be performed by a contractor qualified in the installation and  

service of equipment sold and supplied by Roberts-Gordon LLC and conform to all requirements set forth in the ROBERTS GORDON

®

 

manuals and all applicable governmental authorities pertaining to the installation, service and operation of the equipment. To help fa-

cilitate optimum performance and safety, Roberts-Gordon LLC recommends that a qualified contractor conduct, at a minimum, annual 

inspections of your ROBERTS GORDON

®

 equipment and perform service where necessary, using only replacement parts sold and 

supplied by Roberts-Gordon LLC.

Further Information: 

Applications, engineering and detailed guidance on systems design, installation and equipment performance is  

available through ROBERTS GORDON

®

 representatives. Please contact us for any further information you may require, including the  

Installation, Operation and Service Manual. 
These products (with the exception of the UHA[X][S]30 - 75) are not for residential use.
This document is intended to assist licensed professionals in the exercise of their professional judgment. 

Printed in U.S.A.

UHAESNA

1209 Rev A

Roberts-Gordon LLC
1250 William Street
P.O. Box 44
Buffalo, NY 14240-0044 USA 
Telephone: +1.716.852.4400
Fax: +1.716.852.0854
Toll Free: 800.828.7450

 

     

A.  General: Install gas-fired unit heaters as indicated, in 

accordance with manufacturer's installation instructions 

and in compliance with applicable codes and approvals. 

Allow adequate space for combustion air supply, circulation 

(axial) fan air supply, servicing or removal of the unit 

without disturbing other equipment. For installation at 

altitudes above 2,000' (610 m), inform manufacturer at time 

of order for appropriate high altitude adjustment and rating 

by the manufacturer.

B.  Support: Suspend heater, venting, gas piping and conduit 

from building substrate as indicated, or if not indicated, in 

a manner to provide durable and safe installation; and in 

accordance with manufacturer's installation instructions. 

Recommended mounting heights shall be measured from 

floor level. Models 30 - 45 shall have a recommended 

mounting height of 12' (3.7 m). Models 60 - 75 shall have 

a recommended mounting height of 15' (4.6 m). Models 

100 - 175 shall have a recommended mounting height of 

20' (6.1 m). Models 200 - 250 shall have a recommended 

mounting height of 25' (7.6 m). Models 300 - 400 shall have 

a recommended mounting height of 30' (9.1 m).

C.  Clearances to Combustibles: Do not impede upon 

clearances to combustibles outlined and printed on burner 

nameplate, and in manufacturer's product data. Measure 

clearances distance from surface of cabinet. Models 30-

125 shall have a rated clearances to combustibles of 0" 

(0 cm) below unit and not to exceed 1" (2.54 cm) above 

the unit. Models 150-400 shall have a rated clearances to 

combustibles of 3" (7.62 cm) below unit and 6" (15.24 cm) 

above the unit.

D.  Venting: Install vent piping as indicated and per national 

and local codes. Terminate where indicated with vent 

terminal assembled per instructions supplied by the 

manufacturer of the vent terminal. Properly support 

venting. Penetrations through combustible surfaces 

must obey all venting clearances defined by local codes 

and heater and venting manufacturers. Vent insulation 

recommended depending on vent lengths as indicated by 

manufacturer. Condensate drains may be recommended as 

indicated by manufacturer.

E.  Gas Piping: Install gas piping as indicated and in 

accordance with NFPA Article 54 National Fuel Gas Code 

(latest edition), local requirements and the Installation, 

Operation and Service Manual. Gas pressure supply to each 

burner shall be as specified by heater manufacturer.  For 

units running on natural gas, the required gas supply inlet 

pressure must be between 5.0 in wc (12.5 mbar) and 14.0 

in wc (34.9 mbar). For units running on LPG, the required 

gas supply inlet pressure must be between 12.0 in wc (29.9 

mbar) and 14.0 in wc (34.9 mbar).

F.  Electrical Wiring: Install electrical wiring per NFPA 

Article 70 National Electric Code (latest edition), local 

requirements and the information and wiring diagrams in 

the Installation, Operation and Service Manual.

G.  Thermostat Devices: Where indicated, provide 24 V 

thermostat device connected to heater.  Mount thermostat 

device 5' - 6' (1.5 m -1.8 m) above finish floor or otherwise 

as noted on the drawing. Thermostat wiring must follow 

local codes. Mount wall instruction tag (provided by 

manufacturer) at user level near thermostat device.

H.  Start-Up: Start-up, test, and adjust gas-fired heaters in 

accordance with manufacturer's start-up instructions, 

and Utility Company's requirements. Check and calibrate 

controls, adjust burners, if applicable, according to 

manufacturer's instructions for maximum efficiency.

A.  See plans.