Roberts Gorden WHA XS Series PART 3 EXECUTION, Roberts-GordonLLC 1250 William Street P.O. Box

PART 3: EXECUTION

3.1 INSTALLATION

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.

3.2SCHEDULES

A. See plans.

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.

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

© 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