Roberts Gorden Corayvac CRV-B Series Manual

WARNING
Installation must be done by a contractor qualified
in the installation and service of gas-fired heating
equipment or your gas supplier.
Improper installation, adjustment, alteration, service
or maintenance can result in death, injury or
property damage. Read the Installation, Operation
and Service Manual thoroughly before installing or
servicing this equipment.
Installer
Please take the time to read and understand
these instructions prior to any installation.
Installer must give a copy of this manual to the owner.
Owner
Keep this manual in a safe place in order to provide
your service technician with necessary information.
CRV-B-2
CRV-B-4
CRV-B-6
CRV-B-8
CRV-B-9
CRV-B-10
CRV-B-12
CRV-B-12A
P/N 127102NA Rev. W 02/19
WARNING
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. DO NOT try to light any appliance.
3. DO NOT use electrical switches.
4. DO NOT use any telephone in
your building.
5. Extinguish any open flame.
6. Leave the building.
7. Immediately call your local gas
supplier after leaving the building.
Follow the gas supplier’s
instructions.
8. If you cannot reach your gas
supplier, call the Fire Department.
Fire Hazard
Keep all flammable objects, liquids and
vapors the minimum required clear-
ances to combustibles away from
heater.
Some objects will catch fire or explode
when placed close to heater.
Failure to follow these instructions can
result in death, injury or property
damage.
© 2019 Roberts-Gordon LLC
Roberts-Gordon LLC
1250 William Street
P. O . B o x 4 4
Buffalo, New York 14240-0044
Telephone: [phone]
Fax: [phone]
Toll Free: 800.828.7450
www.robertsgordon.com
This heater is not certified to meet the requirements of NFPA30A-2012 Section 7.6.6. (maximum tube temperature of 750° F (399° C). Do not install this
heater in facilities where major repairs are conducted on compressed natural gas (CNG) or liquefied natural gas (LNG) fueled vehicles.
Model CRV-B
Custom-Engineered,
Low-Intensity Infrared
Heating Systems
Installation, Operation &
Service Manual

© 2019
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: Heater Safety...................................................... 1
1.1 Manpower Requirements .............................................1
1.2 Safety Labels and Their Placement .............................1
1.3 California Proposition 65 ..............................................1
SECTION 2: Installer Responsibility ..................................... 4
2.1 Wall Tag.......................................................................4
2.2 Corrosive Chemicals.................................................... 4
2.3 National Standards and Applicable Codes ..................4
SECTION 3: Clearances to Combustibles............................. 5
3.1 Required Clearances to Combustibles.........................5
SECTION 4: National Standards and Applicable Codes ..... 9
4.1 Gas Codes...................................................................9
4.2 Aircraft Hangars ...........................................................9
4.3 Public Garages ............................................................9
4.4 Electrical ......................................................................9
4.5 Venting.........................................................................9
4.6 High Altitude ................................................................9
SECTION 5: Major Components .......................................... 10
5.1 Standard Parts List .................................................... 16
SECTION 6: Design Requirements...................................... 18
SECTION 7: Heater Installation............................................ 20
7.1 Tube Installation ........................................................23
7.2 Coupling and Tube Assembly....................................23
7.3 Reflector Installation ..................................................25
7.4 Burner Installation......................................................28
SECTION 8: Optional Heater Accessories .......................... 29
8.1 U-Tube Configuration.................................................29
8.2 Tee Installation ..........................................................30
8.3 Reflector Joint............................................................31
8.4 Reflector Side Extension............................................33
8.5 Universal Shield.........................................................34
8.6 Barrier Shield.............................................................34
8.7 Two-Foot Decorative Grille Installation.......................35
8.8 Protective Grille Installation........................................37
SECTION 9: Pump Installation and Venting....................... 38
9.1 Pump Installation .......................................................38
9.2 General Venting Requirements Model EP-100, EP-200
and EP-300 Series Pumps......................................................42
SECTION 10: Outside Air Supply.........................................46
10.1 Pressurized ..............................................................46
10.2 Non-Pressurized ......................................................46
10.3 Outside Air Blower Internal Wiring ...........................47
SECTION 11: Gas Piping...................................................... 50
SECTION 12: Control Methods ............................................ 52
12.1 CORAYVAC® Heating Control.................................52
12.2 CORAYVAC®Modulating Heating Control (CRV-B 6/8/9/
10/12/12A Only) ...............................................................52
12.3 CORAYVAC®Modulating Thermostat ..................... 52
12.4 DPDT Transformer Relay (P/N 90436300) .............. 53
SECTION 13: StartingThe System...................................... 63
13.1 Checking the Gas Line ............................................ 63
13.2 Checking the Electrical System ............................... 63
13.3 Starting the System ................................................. 63
13.4 Setting the Vacuum.................................................. 64
SECTION 14: Variable Frequency Drive ProgrammingFor Use
With CORAYVAC®ModulatingHeatingControl ................. 66
14.1 VFD Parameter Settings For Use With CORAYVAC®
Modulating Heating Control .................................................... 66
14.2 Altering VFD Parameters For Use With CORAYVAC®
Modulating Heating Control .................................................... 67
SECTION 15: Variable Frequency Drive ProgrammingFor Use
With CORAYVAC®System With ModulatingThermostat .. 68
15.1 VFD Parameter Settings For Use With Modulating
Thermostats............................................................................ 68
15.2 Altering VFD Parameters For Use With CORAYVAC®
System With Modulating Thermostat...................................... 69
SECTION 16: CommissioningThe CORAYVAC®Modulating
System ................................................................................... 70
16.1 Setting The CORAYVAC®End Burner Vacuum....... 70
16.2 Adjusting the Variable Frequency Drive ................... 70
SECTION 17: Operation and Maintenance.......................... 72
17.1 Sequence of Operation ............................................ 72
17.2 To Shut Off Heater.................................................... 72
17.3 To Start Heater ......................................................... 72
17.4 Pre-Season Maintenance and Annual Inspection .... 72
17.5 Maintenance Checklist ............................................. 73
SECTION 18: Troubleshooting............................................. 75
18.1 Troubleshooting FlowChart..................................... 76
SECTION 19: Replacement Parts ........................................ 78
19.1 Replacement Parts Instructions............................... 80
SECTION 20: General Specifications.................................. 81
20.1 Material Specifications............................................. 81
20.2 Heater Specifications............................................... 81
20.3 Suspension Specifications....................................... 81
20.4 Controls Specifications ............................................ 81
SECTION 21: The ROBERTS GORDON®CORAYVAC®Limited
Warranty ................................................................................ 83
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 regis-
tered 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®.

TABLE OF FIGURES
Figure 1: Side Panel Label Placement......................................2
Figure 2: Top and Back Panel Label Placement .......................3
Figure 3: Level Reflector ...........................................................6
Figure 4: One Side Reflector.....................................................6
Figure 5: Two Side Reflectors ...................................................6
Figure 6: Universal Shield (with and without holes), Position 1. 7
Figure 7: Universal Shield (with and without holes), Position 2. 7
Figure 8: Universal Shield (with and without holes), Position 3. 7
Figure 9: 2-Foot Deco Grille......................................................8
Figure 10: Barrier Shield ...........................................................8
Figure 11: Protective Grille ........................................................8
Figure 12: Major Component Descriptions - Standard Reflector.
10
Figure 13: Major Component Descriptions - Standard Reflector
(Continued)............................................................ 11
Figure 14: Classic System Component Descriptions - Standard or
High Efficiency Reflector........................................ 11
Figure 15: Major Component Descriptions - High Efficiency
Reflector................................................................. 12
Figure 16: Major Component Descriptions - High Efficiency
Reflector (Continued)............................................. 13
Figure 17: Optional Heater Accessories..................................14
Figure 18: Pumps and Controls Descriptions.......................... 15
Figure 19: Heater Assembly Overview................................... 19
Figure 20: Critical Hanger Placement .....................................21
Figure 21: Critical Hanger Placement (CORAYVAC® Classic)22
Figure 22: U-Tube Heater Assembly Overview......................30
Figure 23: Reflector Joint Detail..............................................32
Figure 24: Condensate Valve Assembly (EP-100 and EP-300)38
Figure 25: EP-200 Condensate Valve Assembly.....................39
Figure 26: Condensate Neutralization Tube............................41
Figure 27: Vertical Venting Configuration................................43
Figure 28: EP-100 and EP-200 Horizontal Venting Configurations
44
Figure 29: EP-300 Series Horizontal Venting Configurations .. 45
Figure 30: Duct Sizing ............................................................47
Figure 31: Outside Air Blower Internal Wiring Diagram...........47
Figure 32: Filter Housing Assembly ........................................48
Figure 33: Air Supply Blower Support.....................................48
Figure 34: Pressurized Outside Air Supply..............................49
Figure 35: Non-Pressurized Outside Air Supply......................49
Figure 36: Gas Connection with Flexible Gas Hose................51
Figure 37: One Zone Operation without Control Panel (optional)
54
Figure 38: One Zone Operation (with Outside Air Blower) without
Control Panel (optional) .........................................55
Figure 39: Two Zone Operation without Control Panel (optional)
56
Figure 40: General System Wiring .......................................... 57
Figure 41: External Wiring Diagram EP-100 and EP-201 120 V 1
Ø Pump ................................................................. 57
Figure 42: External Wiring Diagram EP-100, EP-201 or EP-301
230 V 1 Ø Pump (optional).................................... 58
Figure 43: External Wiring Diagram EP-203 or EP-303 208 - 230
V (or 460 V) 3 Ø Pump (optional).......................... 59
Figure 44: CORAYVAC®Modulating Wiring Diagram [LonWorks®
(2-10 Vdc with 500 ohm resistor) optional] ............ 60
Figure 45: CORAYVAC®Modulating Wiring Diagram [LonWorks®
(4-20 mA) optional]................................................ 61
Figure 46: Burner Internal Wiring............................................ 62
Figure 47: Burner Internal Ladder Diagram............................ 62
Figure 48: Vacuum Reading ................................................... 65
Figure 49: Possible Damper Couplings’ Locations.................. 71

SECTION 1: HEATER SAFETY
1 of 85
SECTION 1: HEATER SAFETY
Yo ur Safety is Important to Us!
This symbol is used throughout
the manual to notify youof
possible fire, electrical or burn
hazards. Please pay special
attention when reading and
following the warnings in these
sections.
Installation, service and annual inspection of heater
must be done by a contractor qualified in the
installation and service of gas-fired heating
equipment.
Read this manual carefully before installation,
operation or service of this equipment.
This heater is designed for heating nonresidential
indoor spaces. Do not install in residential spaces.
This heater is not certified to meet the requirements
of NFPA30A-2012 Section 7.6.6. (maximum tube
temperature of 750 °F (399 °C)). Do not install this
heater in facilities where compressed natural gas
(CNG) or liquid natural gas (LNG) are present. These
instructions, the layout drawing, local codes and
ordinances, and applicable standards that apply to
gas piping, electrical wiring, venting, etc. must be
thoroughly understood before proceeding with the
installation.
Protective gear is to be worn during installation,
operation and service in accordance to the
Occupational Safety and Hazard Administration
(OSHA). Gear must be in accordance to NFPA 70E,
latest revision when working with electrical
components. Thin sheet metal parts have sharp
edges. To prevent injury, the use of work gloves is
recommended. The use of gloves will also prevent
the transfer of body oils from the hands to the surface
of the reflector.
Before installation, check that local distribution
conditions, nature of gas and pressure, and
adjustment of the appliance are compatible.
This heater must be applied and operated under the
general concepts of reasonable use and installed
using best building practices.
This appliance is not intended for use by persons
(including children) with reduced physical, sensory or
mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a
person responsible for their safety. Children should
be supervised to ensure that they do no play with the
appliance.
For additional copies of the Installation, Operation
and Service Manual, please contact Roberts-Gordon
LLC.
1.1 Manpower Requirements
To prevent personal injury and damage to the heater,
two persons will be required for installation.
1.2 Safety Labels and Their Placement
Product safety signs or labels should be replaced by
the product user when they are no longer legible.
Please contact Roberts-Gordon LLC or your
ROBERTS GORDON®independent distributor to
obtain replacement signs or labels. See Page 2,
Figure 1 through Page 3, Figure 2.
1.3 California Proposition 65
In accordance with California Proposition 65
requirements, a warning label must be placed in a
highly visible location on the outside of the
equipment (i.e., near equipment’s serial plate). See
label placement drawing on Page 2, Figure 1 for label
location. Avoid placing label on areas with extreme
heat, cold, corrosive chemicals or other elements. To
order additional labels, please contact Roberts-
Gordon LLC or your ROBERTS GORDON®
independent distributor.

CRV-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
2 of 85
FIGURE 1: Side Panel Label Placement
Control Side Panel
Rating Plate Label
Logo Label
Clearances to Combustibles Label Control Side Panel (inside)
Filter Side Panel (inside)
Wiring Label
Internal Ladder Diagram Label
TRANSFORMER/Transformateur
GAS VALVE/
Valve à gaz
120 V
POWER SUPPLY/
Alimentation Électrique
BROWN/Marron
GREEN/Vert
WHITE/Blanc
BLACK/Noir
34
15
BURNER/
Brûleur
IGNITIONMODULE/
Module d’Allumage
BLUE/Bleu
YELLOW/
Jaune
S1
TH
V1
Internal Wiring Diagram/
Schéma de Câblage Interne
If any of the original wire supplied with the heater must be
replaced, it must be replaced with wiring material having a
temperature rating of at least 105°C and 600 volts.
Printed in U.S.A/Impriméaux Etats-Unis P/N91017300 Rev. C
Si une partie du câblage d’origine fourni avec le radiateur doit
être remplacée, elle doit l’être par du matériel de câblage
tolérant une témperature d’au moins 105°C et 600 volts.
© 2017 www.robertsgordon.com
YELLOW/
Jaune
YELLOW/
Jaune
GREEN/Vert
BLACK/Noir
V2/GND
Roberts Gordon
TRANSFORMER/Transformateur
GAS VALVE/ Valveà gaz
120V
POWER SUPPLY/
Alimentation Électrique
BROWN/Marron
GREEN/Vert
WHITE/Blanc
BLACK/Noir
34
15
BURNER/
Brûleur
IGNITIONMODULE/
Module d’Allumage
BLUE/Bleu
YELLOW/
Jaune
S1
TH
V1
InternalWiring Diagram/ Schéma de Câblage Interne
If any of the original wiresupplied with the heater must be
replaced, it must be replacedwith wiring material having a
temperaturerating of at least 105°C and 600 volts.
Printedin U.S.A/Impriméaux Etats-Unis P/N91017300 Rev.C
Si une partie du câblage d’origine fourni avec le radiateurdoit être remplacée,elle doit l’être par du matériel de câblage
tolérant une témperature d’au moins 105°Cet 600 volts.
© 2017 www.robertsgordon.com
YELLOW/
Jaune
YELLOW/
Jaune
GREEN/Vert
BLACK/Noir
V2/GND
Roberts Gordon
Description Part Number
Logo Label 91013224
Rating Plate Label 91010401
Clearances to Combustibles Label 91009101
Internal Ladder Diagram Label 91017301
Wiring Label 91017300

SECTION 1: HEATER SAFETY
3 of 85
FIGURE 2: Top and Back Panel Label Placement
Description Part Number
Gas Connection Label 91018125
Burner Box Combination Label 91029600
Proposition 65 Label 91070016

CRV-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
4 of 85
SECTION 2: INSTALLER RESPONSIBILITY
The installer is responsible for the following:
• To ensure the system is designed in accordance
with the parameters of the CRV-Series Design
Manual (P/N 127500NA).
• To install the heater, as well as the gas and
electrical supplies, in accordance with applicable
specifications and codes. Roberts-Gordon LLC
recommends the installer contact a local Building
Inspector or Fire Marshal for guidance.
• To use the information given in a layout drawing
and in the manual together with the cited codes
and regulations to perform the installation.
• To install the heater in accordance with the
clearances to combustibles requirements.
• To furnish all needed materials not furnished as
standard equipment.
• To plan location of supports.
• To provide access to burners on all sides for
servicing or burner removal.
• To provide the owner with a copy of this
Installation, Operation and Service Manual.
• To never use heater as a support for ladder or
other access equipment and to never hang or
suspend anything from heater.
• To ensure there is adequate air circulation around
the heater and to supply air for combustion,
ventilation and distribution in accordance with
local codes.
• To safely and adequately install heater using
materials with a minimal working load of 75 lb
(33 kg).
• To ensure the heater is placed in an approved
application.
2.1 Wall Tag
A laminated wall tag is available for the heater as a
permanent reminder of the safety instructions and
the importance of the required clearances to
combustibles. Please contact Roberts-Gordon LLC
or your ROBERTS GORDON®independent
distributor to obtain the wall tag. Affix the tag by
peeling off the backing of the adhesive strips on the
rear surface and position the tag on a wall near the
CRV-Series heater (e.g. thermostat or controller).
A copy of the wall tag (P/N 91037912) is illustrated on
the back cover. For an immediate solution, youmay
affix this copy on the wall near the heater.
Knowyour model number and installed configuration.
Model number and installed configuration are found
on the burner and in the Installation, Operation and
Service Manual. See Page 6, Figure 3 through Page
8, Figure 11. Write the proper clearance dimensions
in permanent ink according to your model number
and configuration in the open spaces on the tag.
2.2 Corrosive Chemicals
Roberts-Gordon LLC cannot be responsible for
ensuring that all appropriate safety measures are
undertaken prior to installation; this is entirely the
responsibility of the installer. It is essential that the
contractor, the sub-contractor, or the owner identifies
the presence of combustible materials, corrosive
chemicals or halogenated hydrocarbons* anywhere
in the premises.
* Halogenated Hydrocarbons are a family of
chemical compounds characterized by the
presence of halogen elements (fluorine, chlorine,
bromine, etc.). These compounds are
frequently used in refrigerants, cleaning agents,
solvents, etc. If these compounds enter the air
supply of the burner, the life span of the heater
components will be greatly reduced. An outside air
supply must be provided to the burners whenever
the presence of these compounds is suspected.
Warranty will be invalid if the heater is exposed to
halogenated hydrocarbons.
2.3 National Standards and Applicable Codes
All appliances must be installed in accordance with
the latest revision of the applicable standards and
national codes. This refers also to the electric, gas
and venting installation. Note: Additional standards
for installations in public garages, aircraft hangars,
etc. may be applicable.
CAUTION
Product Damage Hazard
Do not use heater in area containing
corrosive chemicals.
Refer to appropriate Material Safety Data
Sheets (MSDS).
Failure to follow these instructions can result
in product damage.

SECTION 3: CLEARANCES TO COMBUSTIBLES
5 of 85
SECTION 3: CLEARANCES TO COMBUSTIBLES
3.1 Required Clearances to Combustibles
Clearances are the required distances that
combustible objects must be away from the heater to
prevent serious fire hazards. Combustibles are
materials that may catch fire and include common
items such as wood, paper, rubber, fabric, etc.
Maintain clearances to combustibles at all times
for safety.
Clearances for all heater models are located on the
burner of the heater and on Page 6, Figure 3 through
Page 8, Figure 11 in this manual. Check the
clearances on each burner for the model heater
being installed to make sure the product is suitable
for your application and the clearances are
maintained. Read and followthe safety guidelines
below:
• Keep gasoline or other combustible materials
including flammable objects, liquids, dust or
vapors away from this heater or any other
appliance.
• The stated clearances to combustibles represents
a surface temperature of 90° F (32°C) above room
temperature. Building materials with a lowheat
tolerance (such as plastics, vinyl siding, canvas,
tri-ply, etc) may be subject to degradation at lower
temperatures. It is the installer’s responsibility to
assure that adjacent materials are protected from
degradation.
• Maintain clearances from heat sensitive
equipment and workstations.
• Maintain clearances from vehicles parked below
the heater.
• Maintain clearances from swinging and overhead
doors, overhead cranes, vehicle lifts, partitions,
storage racks, hoists, building construction, etc.
• In locations used for the storage of combustible
materials, signs must be posted to specify the
maximum permissible stacking height to maintain
required clearances from the heater to the
combustibles. Signs must be posted adjacent to
the heater thermostat. In the absence of a
thermostat, signs must be posted in a
conspicuous location.
• Consult local Fire Marshal, Fire Insurance Carrier
or other authorities for approval of proposed
installation when there is a possibility of exposure
to combustible airborne materials or vapors.
• Hang heater in accordance to the minimum
suspension requirements on Page 21, Figure 20.
• If the radiant tubes must pass through the building
structure, be sure that adequate sleeving and fire
stop is installed to prevent scorching and/or fire
hazard.
WARNING
Fire Hazard
Keep all flammable objects, liquids and
vapors the minimum required clearances to
combustibles away from heater.
Some objects will catch fire or explode when
placed close to heater.
Failure to follow these instructions can result
in death, injury or property damage.

CRV-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
6 of 85
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, elbows, tees and crosses.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from
where the combustion chamber and the tube connect.
.
FIGURE 3: LEVEL REFLECTOR
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 20 48 20 11 51 122 51
CRV-B-4 4 20 48 20 11 51 122 51
CRV-B-6 4 20 48 20 11 51 122 51
CRV-B-8 4 20 48 20 11 51 122 51
CRV-B-9 4 36 60 36 11 92 153 92
CRV-B-10 4 366036119215392
CRV-B-12 4 36 60 36 11 92 153 92
CRV-B-12A 4 36 60 36 11 92 153 92
B
CD
A
FIGURE 4: ONE SIDE REFLECTOR
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 12 56 20 11 31 143 51
CRV-B-4 4 12 56 20 11 31 143 51
CRV-B-6 4 12 56 20 11 31 143 51
CRV-B-8 4 12 56 20 11 31 143 51
CRV-B-9 4 12 60 42 11 31 153 107
CRV-B-10 4 12 60 42 11 31 153 107
CRV-B-12 4 12 60 42 11 31 153 107
CRV-B-12A 4 12 60 42 11 31 153 107
A
B
C
D
FIGURE 5: TWO SIDE REFLECTORS
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 12 56 12 11 31 143 31
CRV-B-4 4 12 56 12 11 31 143 31
CRV-B-6 4 12 56 12 11 31 143 31
CRV-B-8 4 12 56 12 11 31 143 31
CRV-B-9 4 12 60 12 11 31 153 31
CRV-B-10 4 12 60 12 11 31 153 31
CRV-B-12 4 12 60 12 11 31 153 31
CRV-B-12A 4 12 60 12 11 31 153 31
A
B
C
D

SECTION 3: CLEARANCES TO COMBUSTIBLES
7 of 85
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, elbows, tees and crosses.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from
where the combustion chamber and the tube connect.
FIGURE 6: UNIVERSAL SHIELD (WITH AND WITHOUT HOLES), POSITION 1
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 12 12 12 11 31 31 31
CRV-B-4 4 12 12 12 11 31 31 31
CRV-B-6 4 12 12 12 11 31 31 31
CRV-B-8 4 12 12 12 11 31 31 31
CRV-B-9 8 18 24 18 21 46 61 46
CRV-B-10 8 18241821466146
CRV-B-12 8 18 24 18 21 46 61 46
CRV-B-12A 8 18241821466146
C
A
BD
FIGURE 7: UNIVERSAL SHIELD (WITH AND WITHOUT HOLES), POSITION 2
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 24 48 24 11 61 122 61
CRV-B-4 4 24 48 24 11 61 122 61
CRV-B-6 4 24 48 24 11 61 122 61
CRV-B-8 4 24 48 24 11 61 122 61
CRV-B-9 4 36 48 36 11 92 122 92
CRV-B-10 4 36 48 36 11 92 122 92
CRV-B-12 4 36 48 36 11 92 122 92
CRV-B-12A 4 36 48 36 11 92 122 92
C
A
BD
FIGURE 8: UNIVERSAL SHIELD (WITH AND WITHOUT HOLES), POSITION 3
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 12 56 30 11 31 143 77
CRV-B-4 4 12 56 30 11 31 143 77
CRV-B-6 4 12 56 30 11 31 143 77
CRV-B-8 4 12 56 30 11 31 143 77
CRV-B-9 8 12 60 42 21 31 153 107
CRV-B-10 8 12 60 42 21 31 153 107
CRV-B-12 8 12 60 42 21 31 153 107
CRV-B-12A 8 12 60 42 21 31 153 107
C
A
BD

CRV-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
8 of 85
NOTE: 1. All dimensions are from the surfaces of all tubes, couplings, elbows, tees and crosses.
2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from
where the combustion chamber and the tube connect.
FIGURE 9: 2-FOOT DECO GRILLE
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 12 48 12 11 31 122 31
CRV-B-4 4 12 48 12 11 31 122 31
CRV-B-6 4 12 48 12 11 31 122 31
CRV-B-8 4 12 48 12 11 31 122 31
CRV-B-9 4 18 56 18 11 46 143 46
CRV-B-10 4 18 56 18 11 46 143 46
CRV-B-12 4 18 56 18 11 46 143 46
CRV-B-12A 4 18 56 18 11 46 143 46
A
B
CD
FIGURE 10: BARRIER SHIELD
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 12 12 12 11 31 31 31
CRV-B-4 4 12 12 12 11 31 31 31
CRV-B-6 4 12 12 12 11 31 31 31
CRV-B-8 4 12 12 12 11 31 31 31
CRV-B-9 - UNAPPROVED - - UNAPPROVED -
CRV-B-10 - UNAPPROVED - - UNAPPROVED -
CRV-B-12 - UNAPPROVED - - UNAPPROVED -
CRV-B-12A - UNAPPROVED - - UNAPPROVED -
C
A
BD
FIGURE 11: PROTECTIVE GRILLE
(inches) (centimeters)
Model ABCDABCD
CRV-B-2 4 20 48 20 11 51 122 51
CRV-B-4 4 20 48 20 11 51 122 51
CRV-B-6 4 20 48 20 11 51 122 51
CRV-B-8 4 20 48 20 11 51 122 51
CRV-B-9 4 36 60 36 11 92 153 92
CRV-B-10 4 36 60 36 11 92 153 92
CRV-B-12 4 36 60 36 11 92 153 92
CRV-B-12A 4 36 60 36 11 92 153 92
A
B
CD

SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES
9 of 85
SECTION 4: NATIONAL STANDARDS AND
APPLICABLE CODES
4.1 Gas Codes
The type of gas appearing on the nameplate
must be the type of gas used. Installation must
comply with national and local codes and
requirements of the local gas company.
United States: Refer to National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
4.2 Aircraft Hangars
Installation in aircraft hangars must be in
accordance with the following codes:
United States: Refer to Standard for Aircraft
Hangars, NFPA 409 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
In aircraft storage and servicing areas, heaters
shall be installed at least 10' (3 m) above the
upper surface of wings or of engine enclosures
of the highest aircraft which may be housed in
the hangar. The measurement shall be made
from the wing or engine enclosure (whichever is
higher from the floor) to the bottom of the heater.
• In shops, offices and other sections of aircraft
hangars communicating with aircraft storage or
servicing areas, heaters shall be installed not
less than 8' (2.4 m) above the floor.
• Suspended or elevated heaters shall be so
located in all spaces of aircraft hangars that they
shall not be subject to injury by aircraft, cranes,
movable scaffolding or other objects. Provisions
shall be made to assure accessibility to
suspended heaters for recurrent maintenance
purposes.
4.3 Public Garages
Installation in garages must be in accordance
with the following codes:
United States: Refer to Standard for Parking
Structures NFPA 88A - latest revision or the
Code for Motor Fuel Dispensing Facilities and
Repair Garages, NFPA 30A - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
• Heaters must not be installed less than 8'
(2.4 m) above the floor. Minimum clearances to
combustibles must be maintained from vehicles
parked belowthe heater.
• When installed over hoists, minimum
clearances to combustibles must be maintained
from the upper most point of objects on the hoist.
4.4 Electrical
The heater must be electrically grounded in
accordance with the following codes:
United States: Refer to National Electrical
Code®, NFPA 70 - latest revision. Wiring must
conform to the most current National Electrical
Code®, local ordinances and any special
diagrams furnished.
Canada: Refer to Canadian Electrical Code,
CSA C22.1 Part 1 - latest revision.
4.5 Venting
The venting must be installed in accordance with
the requirements within this manual and the
following codes:
United States: Refer to National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
4.6 High Altitude
These heaters are approved for installations up
to 2000' (610 m)(US), 4500' (1370 m)(Canada)
without modification. Consult factory if US
installation is above 2000' (610 m) or Canadian
installation is above 4500' (1370 m).

CRV-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
10 of 85
SECTION 5: MAJOR COMPONENTS
The figures in this section provide a general overview
of component placement in a CRV-Series system.
The location of some components such as supports
and couplings is crucial for proper installation.
Assemble the heater components as shown on Page
19, Figure 19.
Optional reflector configurations are shown on Page
6, Figure 3 through Page 8, Figure 11. Install
appropriate suspension hardware, beam clamps,
chain or rod at predetermined locations. Adjustments
of chain length will provide uniform pitch.
FIGURE 12: Major Component Descriptions - Standard Reflector
Burner Tube
Hot rolled, heat treated or
coated aluminized tube
supplied in 10' (3 m) lengths.
45° Elbow 90° Elbow
End Vent
CouplingAssembly
with Lock
Flex Gas Line
with shut-off cock
Combustion Chamber Tee
Standard
Reflector
(Aluminum or
Stainless Steel)
Alternate overlap as
shown on Page 27,
Section 7.3.3. Minimum
overlap is 6" (16 cm).
Standard
Reflector with Hole
(Aluminum or
Stainless Steel)
Alternate overlap as
shown on Page 27,
Section 7.3.3. Minimum
overlap is 6" (16 cm).
Tube Adapter
Cross

SECTION 5: MAJOR COMPONENTS
11 of 85
FIGURE 13: Major Component Descriptions - Standard Reflector (Continued)
FIGURE 14: Classic System Component Descriptions - Standard or High Efficiency Reflector
Reflector Joint Reflector End Cap
(Aluminum or Stainless
Steel)
Punch out center section to
accommodate tube.
S-Hook
Turnbuckle
Tube and Reflector Hanger
Suspend system from these
hangers.
Reflector Support Strap &
Wire Form
Tube
Schedule 40 steel pipe
(supplied by others.)
Schedule 40
Tube and Reflector Hanger
Suspend system from these hangers.
Schedule 40
Reflector Support Strap & Wire Form
Schedule 40
Adapter
Cast-Iron Combustion
Chamber Schedule 40
Damper Nipple
ROBERTS-GORDON®
3/8" SpringHook

CRV-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
12 of 85
FIGURE 15: Major Component Descriptions - High Efficiency Reflector
Burner Tube
Hot rolled, heat treated or
coated aluminized tube
supplied in 10' (3 m) lengths.
45° Elbow 90° Elbow
End Vent
CouplingAssembly
with Lock
Flex Gas Line
with shut-off cock
Combustion Chamber Tee
High Efficiency
Reflector with Hole
(Aluminum only)
Alternate overlap as
shown on Page 27,
Section 7.3.3. Minimum
overlap is 6" (16 cm).
Tube Adapter
Cross
High Efficiency
Reflector
(Aluminum only)
Alternate overlap as shown on Page 27,
Section 7.3.3. Minimum overlap is 6" (16 cm).