Service manual

© 2005
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written permission of Roberts-Gordon.
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: Critical Considerations ..................................... 5
3.1 Required Clearances to Combustibles ........................ 5
SECTION 4: Sizing and Design Consideration..................... 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 System Control (P/N 02770002)................................ 26
8.2 ROBERTS GORDON
®
BZC 700 Controller .............. 26
8.3 ROBERTS GORDON
®
ULTRAVAC
TM
....................... 26
8.4 SPST Transformer Relay (P/N 90417600).................26
8.5 DPDT Transformer Relay (P/N 90436300) ................ 26
8.6 Pressure Switch.........................................................27
SECTION 9: Air Supply System ........................................... 28
9.1 Pressurized................................................................ 28
9.2 Non-Pressurized........................................................ 28
9.3 Outside Air System Design Requirements ................ 28
SECTION 10: ROBERTS GORDON
®
ULTRAVAC
TM
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.