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© 2012
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 the
written permission of Roberts-Gordon LLC.
TABLE OF CONTENTS
SECTION 1: Concept ..............................................................1
SECTION 2: The CRV-Series System.....................................2
2.1 Safety...........................................................................2
2.2 Zero Regulator.............................................................2
2.3 Fuel Savings and Comfort ...........................................4
SECTION 3: Clearances to Combustibles.............................5
3.1 Required Clearances to Combustibles.........................5
SECTION 4: Sizing and Design Considerations...................9
4.1 Radiant Adjustment to Heat Loss ................................9
4.2 Radiant Height Adjustment Factor ...............................9
4.3 Selecting the Burners ................................................ 10
4.4 Radiant Distribution ................................................... 10
SECTION 5: Flow Loading....................................................12
5.1 Radiant Branch Flow .................................................12
5.2 Pump Capacity ..........................................................14
5.3 Tailpipe Flow.............................................................. 14
SECTION 6: Radiant Tube and Tailpipe...............................15
6.1 Radiant Tube Length.................................................. 15
6.2 Tailpipe....................................................................... 15
6.3 Design Parameters .................................................... 16
6.4 CRV-Series Design Methods .....................................16
6.5 Tailpipe Design Method ............................................. 18
SECTION 7: Example CRV-Series System Layouts............21
7.1 Example System Layout (Option 1) ............................21
7.2 Example System Layout (Option 2) ............................22
7.3 Example System Layout (Option 3) ............................22
7.4 Example System Layout (Option 4) ............................23
7.5 Example System Layout (Option 5) ............................23
7.6 Example System Layout (Option 6) ............................24
7.7 Example System Layout (Option 7, 8 and 9)...............25
SECTION 8: Control Methods ..............................................26
8.1 ROBERTS GORDON
®
System Control.....................26
8.2 ROBERTS GORDON
®
ULTRAVAC
™
..........................26
8.3 CORAYVAC
®
Modulating Controls.............................26
8.4 SPST Transformer Relay Kit (P/N 90417600K)..........27
8.5 SPDT Transformer Relay (P/N 90436300).................27
8.6 Pressu re Switch .........................................................27
SECTION 9: Air Supply System ...........................................28
9.1 Pressu rized................................................................28
9.2 Non-Pressurized ........................................................28
9.3 Outside Air System Design Requirements.................28
SECTION 10: ROBERTS GORDON
®
ULTRAVAC
™
Design
Requirements................................................. 31
SECTION 11: CRV-Series Equipment Specifications......... 32
11.1 Burner and Burner Controls ..................................... 32
11.2 Equipment ................................................................ 32
Printed in U.S.A.
There are references in this manual to various trademarks. All trademarks mentioned herein, whether registered or not, are the
property of their respective owners. Roberts-Gordon LLC is not sponsored by or affiliated with any of the trademark or registered
trademark owners, and make no representations about them, their owners, their products or services. Roberts-Gordon LLC is not
sponsored by or affiliated with BACnet
®
, LonWorks®or MODBUS®.