Roberts Gorden WHA XS Series Gas Heater User Manual


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Installation Code and Annual Inspections:
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.
© 2009 Roberts-Gordon LLC All rights reserved. No part of this work covered by the copyrights herein may be reproduced or copied in any form or
by any means – graphic, electronic, or mechanical, including photocopying, recording, taping, or information storage
and retrieval systems – without written permission of Roberts-Gordon LLC.
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
www.rg-inc.com
PART 3: EXECUTION
3.1 INSTALLATION
A. General: Install gas-red 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
oor 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 dened 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 specied 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. ermostat Devices: Where indicated, provide 24 V
thermostat device connected to heater. Mount thermostat
device 5' - 6' (1.5 m -1.8 m) above nish oor or otherwise
as noted on the drawing. ermostat 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-red 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 eciency.
3.2 SCHEDULES
A. See plans.
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