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CF2500/CF3500

Burner Manual

Typical Burner Sequence of Operation -
RM7897A Control

When

ring over 20 GPH the CF2500 and CF3500A will

be supplied with a

ame safeguard control. An air

switch and low-

re start relay will also be supplied.

Consult local, state, and federal codes for burner
requirements above 20GPH.

Install the burner and all wiring in accordance with the
National Electrical Code and all applicable local codes or
requirements.

Wire the burner in compliance with all instructions
provided by the appliance manufacturer. Verify operation
of all controls in accordance with the appliance
manufacturer’s guidelines.

Initiate

- Power is supplied to the control. The

control performs a self-check to ensure proper
operation.

Standby

- the burner is idle waiting for a call for

heat. When the call for heat is initiated, the burner
will proceed to step 3.

Pre-purge

- the burner will begin a 60 second pre-

purge to clear the combustion chamber. The burner
checks the air

ow interlock to see if air is being

provided. If the air

ow is not present the burner

will lockout if jumper JR3 is cut or recycle if the
jumper is intact.

Trial for Ignition

- The RM7897A has two trial

periods. The

rst is for light off the second is for

main

ame establishing. The burner must see

ame within 10 seconds if jumper 1 is intact or 4

seconds if jumper 1 is clipped. If the

ame is not

established, the burner will lockout if jumper 2 is
clipped or recycle if the jumper is intact. The burner
will then proceed to main

ame establishing. If

ame is not sensed within 3 seconds the burner

will lockout or recycle depending on the status of
jumper 2.

Run

: With a

ame established and the control

continuing to detect a

ame, the burner will operate

in the RUN mode until the load demand is satis

or a limit opens.

If terminals RC1 and RC2 are jumpered, the
burner operates in the Low-High-Off Mode.
The burner starts at Low, goes to High after the

ame stabilization period. Flame is extinguished

when the load is satis

ed or a limit opens, and

the burner is sent to post purge.

If a high/low control has been wired between
terminals RC1 and RC2 the burner starts at
Low and is released to go High after the

ame

stabilization period. It can repeatedly cycle
between low and high as necessary to meet
load demand until the load is satis

ed or a limit

opens. The burner is then sent to post purge.

Post purge

- The control enters a post purge cycle

to clear the combustion chamber of gases. Length
of the post purge is factory programmed at 15
seconds.

Section: Wire the Burner

Initiate

Stand by

Prepurge

Trial for

Ignition

Post Purge

Run

Recycle

Lockout

Figure 14 - Typical Burner Sequence of
Operation - RM7897A

Содержание CF 2500

Страница 1: ...ation start up or service work Save this manual for future reference y y y Incorrect installation adjustment or misuse of this burner could result in death severe personal injury or substantial property damage To the Professional Qualified Installer or Service Agency Please read and carefully follow all instructions provided in this manual before installing starting or servicing this burner or hea...

Страница 2: ...ractices in the U S refer to the latest edition of NFPA 31 CSA B139 and CSA B140 in Canada Impaired Burner Performance Fire Hazard Do NOT operate the burner beyond specifications outlined in the Table on Page 3 For applications beyond these limits consult Beckett Technical Services at 1 800 645 2876 NOTE Some packaged appliances with burners may be agency listed as a unit to operate beyond these l...

Страница 3: ...nings in the room y y y y y Frozen Plumbing and Water Damage Hazard If the facility is unattended in severely cold weather burner primary control safety lockout heating system component failures power outages or other electrical system failures could result in frozen plumbing and water damage in a matter of hours For protection take preventive actions such as having a security system installed tha...

Страница 4: ...ess whether one pipe with by pass loop or two pipe See Figure 9 for installation of the by pass loop required for one pipe fuel supply installations See Figure 10 for connections to the fuel unit for two pipe fuel supply installations When fuel supply is below the burner fuel unit Use a two pipe oil system when the fuel unit must lift the oil more than 8 feet The return line provided by the two pi...

Страница 5: ... corresponding nozzle from column 1 Rated gph 100 psig two nozzles will be required Example a 5 00 gph nozzle at 300 psig 8 66 gph Verify Firing Rate Refer to appliance manufacturer s instructions if available for firing rate and nozzle selection Otherwise the maximum recommended firing rate for the burner depends on the length of the firing chamber and the distance from the burner center to the c...

Страница 6: ...ure in Inches Water Column W C Maximum Firing Rate U S GPH KP 24 25 Figure 3b Firebox Pressure CF3500 with no Reserve Air 0 2 0 4 0 6 0 8 1 0 0 0 25 20 Firebox Pressure in Inches Water Column W C Maximum Firing Rate U S GPH KR KM 30 35 Install burner with 2 pitch as shown 2 H L T D E 1 4 1 8 Verify Air Tube The information in this section may be disregarded if the air tube is supplied by the appli...

Страница 7: ...sion G is 1 4 nominal Pitch the air tube at 2 from horizontal as shown and secure the flange to the air tube Figure 4 Mount Flange s on Air Tube Stray Light Protect Against Stray Light Lockout Failure to follow these instructions could cause loss of burner operation resulting in no heat an unplanned process interruption work stoppage and the potential for frozen plumbing or other cold weather prop...

Страница 8: ... and 7 Assemble the adjusting plate assembly per the instructions in the assembly packet Slide the secondary adjusting plate item f completely to the left on the indicator adjusting plate item e Finger tighten acorn nut item c to secure the two plates together Slide both plates completely to the left on the primary adjusting plate item g and finger tighten acorn nut item d Slide the completed adju...

Страница 9: ...ng Plate Assembly Legend Figures 6 7 a Adjusting plate assembly b Spline nut for securing nozzle line c Bottom acorn nut d Top acorn nut for setting dim Z only e Indicator adjusting plate f Secondary adjusting plate g Primary adjusting plate Figure 8 Burner Installed in Appliance Front Legend Description Inches H Housing total length 20 J Center to bottom of housing 14 1 2 K Overall housing height...

Страница 10: ... unit nozzle port pressure is factory set at 300 psig At high fire full pressure 300 psig is applied at both oil nozzles causing full input At low fire full pressure 300 psig is applied at one nozzle causing reduced input One pipe Oil System By pass Loop Refer to Figure 9 item k Note the addition of a field installed by pass loop use 3 8 copper tubing from the fuel unit Return port to the Inlet po...

Страница 11: ... port Nozzle Pressure The fuel unit nozzle port pressure is factory set at 300 psig Some original equipment manufacturer burner applications may call for a lower pressure to obtain a required firing rate Do not change this pressure unless directed to do so by the appliance manufacturer 200 psig to 300 psig 200 psig to 300 psig 200 psig to 300 psig 200 psig to 300 psig Section Connect Fuel Lines ...

Страница 12: ...n sent to Motor off Delay Recycle If the flame is lost while the burner is firing the control shuts down the burner enters a 60 second recycle delay and repeats the ignition sequence The control will continue to Recycle each time the flame is lost until it reaches a pre set time allotment The control will then go into Hard Lockout instead of recycle This feature prevents excessive accumulation of ...

Страница 13: ...g and diagnostics Alarm Module For adding isolated low voltage alarm contacts to the base control See Alarm Module Instructions for specifications Contractor s Tool Hand held device for programming and diagnostics Cad Cell Connections Wiring Connections Communication Port 2 Reset Button with Red Light Communication Port 1 Thermostat Terminals Green Light Yellow Light Optional Components Figure 11 ...

Страница 14: ...14 Figure 13 Typical Wiring 7505P Section Wire the Burner ...

Страница 15: ...urner must see flame within 10 seconds if jumper 1 is intact or 4 seconds if jumper 1 is clipped If the flame is not established the burner will lockout if jumper 2 is clipped or recycle if the jumper is intact The burner will then proceed to main flame establishing If flame is not sensed within 3 seconds the burner will lockout or recycle depending on the status of jumper 2 Run With a flame estab...

Страница 16: ...stallation If any of these items are not clear or are unavailable call Beckett at 1 800 645 2876 for assistance y y y y y Do Not Bypass Safety Controls Tampering with or bypassing safety controls could lead to equipment malfunction and result in asphyxiation explosion or fire Safety controls are designed and installed to provide protection Do not tamper with or bypass any safety control If a safet...

Страница 17: ...ide the secondary adjusting plate item f toward the rear of the burner until the number on the indicator plate corresponds to the initial head setting given in Table 6 for the desired firing rate and burner high fire Figure 16 shows a typical example with a 6 head setting When the head position has been set tighten the bottom acorn nut item c and the spline nut item b Start up Checklist Verify the...

Страница 18: ...ush in pin G move the damper by hand so that notch E is between the low fire setting and high fire setting on scale F then release pin G to re engage the motor When the motor is powered it will go to its low fire setting This initial setting should be adequate for starting the burner at low fire Once the burner is in operation the air setting will be adjusted for best performance as discussed late...

Страница 19: ... Skilled in the adjustment of oil burners using combustion test instruments The installation must strictly comply with all applicable codes authorities having jurisdiction and the latest revision of the National Fire Protection Association Standard for the installation of Oil burning Equipment NFPA 31 or CSA B139 and B140 in Canada Regulation by these authorities take precedence over the general i...

Страница 20: ...soon as the burner motor starts rotating To vent Attach a clear plastic tube to the air bleed valve Figure 9 or 10 as applies item p Place the end of the tube in a container to catch the oil Then loosen the fuel unit air vent valve Tighten the air vent valve after all air has been purged IF burner stops during venting The burner primary control will lockout if flame is not established within its t...

Страница 21: ...tion breaks Check the pump pressure and cutoff function Check primary control safety lockout timing Check ignition system for proper operation Inspect the vent system and chimney for soot accumulation or other restriction Clean all flue passages and flue pipe Replace corroded or damaged pipes Clean the appliance thoroughly according to the manufacturer s recommendations Check the burner performanc...

Страница 22: ...Holes 32439U 32439U 13 Rear Cover Door Assembly w Cast Aluminum Door 5994U 51204U w Stamped Sheet Metal Door 5201301U 5201302U 14 Sight Glass All Models 31346 31346 15 Head Assembly KP KM 51475P 51475P KR 51637P 16 Electrode Assembly All Models 51212 51212 17 Ignition Leads 9 1 4 Long 5990092 5990092 10 1 2 Long 5990104 5990104 12 3 4 Long 5990126 5990126 16 1 4 Long 5990162 5990162 20 1 4 Long 59...

Страница 23: ...ual 9 8 7 Figure 18 Burner Replacement Parts 14 10 11 13 12 20 21 22 23 15 16 17 19 18 6 1 2 3 4 5 Figure 19 Adjustable Mounting Plates Air Tube Model Flange A Flange B KP 51498 51630 KM 51498 51630 KR N A 51631 Flange A Flange B ...

Страница 24: ... copy of warranty form 61545 please choose one of the following options Visit our website at www beckettcorp com warranty Email your request to rwb customer service beckettcorp com Write to R W Beckett Corporation P O Box 1289 Elyria OH 44036 NOTE Beckett is not responsible for any labor cost for removal and replacement of equipment THIS WARRANTY IS LIMITED TO THE PRECISE TERMS SET FORTH ABOVE AND...

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