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CRV-S

ERIES

 F

UEL

 C

ONVERSION

 I

NSTRUCTIONS

16 of 21

SECTION 7: OPERATION AND MAINTENANCE

The  heater is equipped with a direct-spark ignition 
system.

7.1 Sequence of Operation

1. Turn the thermostat up. When the thermostat 

calls for heat, the pump will start immediately. 
After a short period, the burners will begin their 
ignition sequence. Sparking will begin at the 
electrodes and the gas valve will be energized 
45 seconds later.

2. The flame will be sensed by the flame sensing 

rod and the electrode is de-energized.

3. If a flame is detected, the gas valve 

remains open. When the call for heat is 
satisfied, the burner shuts off. On CRV-Series 
systems equipped with the optional ROBERTS 
GORDON

®

 

CORAYVAC

®

 Heating Control

, or 

CORAYVAC

®

 Modulating Heating Control, the 

pump will continue operation for a post-purge 
period of two minutes.

4. If no flame is detected, the module will close and 

a purge period begins. If a flame is not 
established, a second purge and warm-up will 
take place and then a third trial cycle will begin. 
After three trials, the module will lockout for one 
hour or until reset. 

5. A reset is accomplished by removing power 

from the module for at least 5 seconds 
(thermostat cycle is required) or automatically 
after 1 hour. 

7.2 To Shut Off Heater

Set thermostat to lowest setting.
Turn OFF electric power to heater.

Turn OFF manual gas valve in the heater supply line.

7.3 To Start Heater

Turn gas valve and electric power OFF and wait five 
minutes for unburned gases to vent from heater.
Turn ON main gas valve.
Turn ON electric power.
Set thermostat to desired temperature. 
Burner should light automatically.

7.4 Pre-Season Maintenance and Annual 

Inspection

To ensure your safety and years of trouble-free oper

-

ation of the heating system, service and annual 
inspections must be done by a contractor qualified in 
the installation and service of gas-fired heating 
equipment.
Turn off gas and electric supplies before performing 
service or maintenance. Allow heater to cool before 
servicing.
Before every heating season, a contractor qualified in 
the installation and service of gas-fired heating 
equipment must perform a thorough safety inspec

-

tion of the heater.
For best performance, the gas, electrical, thermostat 
connections, tubing, venting, suspensions and over

-

all heater condition should be thoroughly inspected.

NOTE:

 Gas flow and burner ignition are among the 

first things that should be inspected.
Please 

see Page 17, Section 7.5

 for suggested items 

to inspect.

Cut/Pinch Hazard

Wear protective gear 
during installation, 
operation and service.

Edges are sharp.

WARNING

Failure to follow these instructions can result in death, electric shock, injury or property damage.

Burn Hazard

Allow heater to cool 
before service.

Tubing may still be hot 
after operation.

Explosion Hazard

Turn off gas supply to 
heater before service.

DANGER

Electrical Shock Hazard

Disconnect electric 

before service.

 

Heater must be 

connected to a properly 

grounded electrical 

source.

Summary of Contents for CORAYVAC CRVB04PN

Page 1: ...Street P O Box 44 Buffalo New York 14240 0044 Telephone 1 716 852 4400 Fax 1 716 852 0854 www robertsgordon com P N 227102NA Rev C 01 20 Fuel Conversion Kit Instructions 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 Immediatel...

Page 2: ......

Page 3: ... Propane Conversions Only 3 3 1 Contents of Fuel Conversion Kits Natural to Propane 3 SECTION 4 For Propane to Natural Conversions Only 4 4 1 Contents of Fuel Conversion Kits Propane to Natural 4 SECTION 5 Fuel Conversion Instructions 5 5 1 Introduction 5 5 2 Burner Removal 6 5 3 Door Assembly Removal 6 5 4 Changing the Orifice 8 5 5 Check Operation of the Unit 8 5 6 Setting the Vacuum 9 5 7 Burne...

Page 4: ......

Page 5: ...jury 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 the local distribution conditions nature of gas and pressure and adjust ment of the appliance are compatible This heater must be applied and operated under the general concepts of reasonable use and installed using be...

Page 6: ...near the heater e g thermostat or ROBERTS GORDON Controller A copy of the wall tag P N 91037912 is illustrated on the back cover For an immediate solution you may affix this copy on the wall near the heater Know your model number and installed configuration Model number and installed configuration are found on the burner and in the Installation Operation and Service Manual Write the proper clearan...

Page 7: ... Conversion Kits Natural to Propane All kits include this manual and the Installation Operation and Service Manual Gas Conversion Label P N 91039400 Orifice P N See table below Kit Number Model Orifice P N Shutter Label CRVB04NP 4 02791039 91039400 CRVB06NP 6 02791030 91039400 CRVB08NP 8 02791026 91039400 CRVB09NP 9 02791019 91039400 CRVB10NP 10 02791021 91039400 CRVB12NP 12 02791012 02753212 9103...

Page 8: ...ts Propane to Natural All kits include this manual and the Installation Operation and Service Manual Gas Conversion Label P N 91039400 Orifice P N See table below Kit Number Model Orifice P N Shutter Label CRVB04PN 4 02791030 91039400 CRVB06PN 6 02791026 91039400 CRVB08PN 8 02791016 91039400 CRVB09PN 9 02791006 02791004 91039400 CRVB10PN 10 02791007 02791003 91039400 CRVB12PN 12A 02791001 02753211...

Page 9: ...ing used in your burner see below The Smaller Maxitrol R 400 regulator was in use beginning in 1991 and ending in March 1996 and was replaced exclusively by the R 500 at this time The R 400 measures approximately 2 x 2 x 3 the R 500 measures 3 x 3 x 4 1 2 Each is clearly marked with the model number See Page 9 Figure 6 for regulator location If R 400 regulator is installed use brown orifice P N 02...

Page 10: ...ostat wires from burner 4 If outside air is installed disconnect 5 Remove the bolts which hold the burner on the transition tube using a 1 2 wrench 6 Remove the burner See Figure 3 7 Save the gasket P N 02568200 or re install a new one after conversion Step 5 3 Door Assembly Removal Remove the wing screws for each door and set the control side doors aside See Page 7 Figure 4 FIGURE 3 Burner Assemb...

Page 11: ...SECTION 5 FUEL CONVERSION INSTRUCTIONS 7 of 21 FIGURE 4 Burner External View From Below FIGURE 5 Burner Top View Internal Assembly ...

Page 12: ... power to system and unit 2 Cycle thermostat 3 When unit cycles the spark ignitor should ignite the main flame immediately NOTE When converting from natural to propane gas there may be a delay until the gas is purged from the system 4 Observe the flame quality look for a steady even flame with no pull off from the burner face indicating a lean condition or a bushy green flame indicating rich mixtu...

Page 13: ... hot 5 Vacuum adjustments are made by means of the damper in the pump inlet and the adjustable damper coupling s in the system Check the vacuum at all end vents and then adjust the damper coupling to obtain equal vacuum readings of 3 5 w c or slightly above then adjust the pump inlet damper until vacuum readings are a minimum 2 5 3 0 w c 6 With systems designed to operate at maximum vacuum it may ...

Page 14: ... INSTRUCTIONS 10 of 21 FIGURE 7 Manometer Reading DANGER Electrical Shock Hazard Disconnect electric before service Appliance must be properly grounded Failure to follow these instructions can result in death or electrical shock ...

Page 15: ... Label 1 Attach the small yellow gas label included in conversion kit to the gas valve Attach the con version label P N 91039400 to the side of the burner housing top See Page 7 Figure 4 2 Replace the burner housing door Enter Data for Natural to Propane Conversions Enter Data for Propane to Natural Conversions Model Propane Orifice Size Model Natural Orifice Size 4 39 4 30 6 30 6 26 8 26 8 16 9 1...

Page 16: ...ler 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...

Page 17: ...6 60 36 11 92 153 92 CRV B 12A 4 36 60 36 11 92 153 92 B C D A FIGURE 10 ONE SIDE REFLECTOR inches centimeters Model A B C D A B C D 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...

Page 18: ...24 18 21 46 61 46 CRV B 12A 8 18 24 18 21 46 61 46 C A B D FIGURE 13 UNIVERSAL SHIELD POSITION 2 inches centimeters Model A B C D A B C D 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 ...

Page 19: ... CRV B 12 4 18 56 18 11 46 143 46 CRV B 12A 4 18 56 18 11 46 143 46 A B C D FIGURE 16 BARRIER SHIELD inches centimeters Model A B C D A B C D 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 B D FI...

Page 20: ...To Start Heater Turn gas valve and electric power OFF and wait five minutes for unburned gases to vent from heater Turn ON main gas valve Turn ON electric power Set thermostat to desired temperature Burner should light automatically 7 4 Pre Season Maintenance and Annual Inspection To ensure your safety and years of trouble free oper ation of the heating system service and annual inspections must b...

Page 21: ...grilles included with select models Immediately remove objects in violation of the clearances to combustibles See Page 12 Section 6 Reflector Support reflector with reflector hanger and support strap Reflector must not touch tube Make sure there is no dirt sagging cracking or distortion Do not operate if there is sagging cracking or distortion Make sure reflectors are correctly overlapped Clean ou...

Page 22: ...f the system insure power is shut off and remove the inlet plate Check the shaft seal and replace it if worn or missing With the Power off Check the inlet and outlet of the pump for blockage or excessive soot and clean as necessary Check boots for cracking or deterioration and replace if necessary If a condensate trap is installed check the condition of the trap and the drain line attached Note th...

Page 23: ... VOID IF The ROBERTS GORDON CORAYVAC is not installed by a contractor qualified in the installation and service of gas fired heating equipment You cannot prove original purchase date and required annual maintenance history The data plate and or serial number are removed defaced modified or altered in any way The ownership of the ROBERTS GORDON CORAYVAC is moved or transferred This warranty is nont...

Page 24: ...CRV SERIES FUEL CONVERSION INSTRUCTIONS 20 of 21 ...

Page 25: ...SECTION 8 THE ROBERTS GORDON CORAYVAC WARRANTY 21 of 21 2020 ...

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