Burnham K50 Make sure all manual resets are activated where applicable

Page 68

(5)Turn on Main Power Switch on both panels. Main Power Lamp on each panel will light.

(6)Turn on manual pilot valves. Both pilots should light.

(7)Turn on Manual Main Gas Valves.

(8)Turn on Main Gas Valve Switch on both panels to light burners. Main Gas Valve Lamp on each panel will light.

Proceed To Paragraph 15- Minimum Input Adjustments (for diaphragm “Lo-Hi-Lo” or motorized type gas valves)

SEQUENCE OF OPERATION EEP – See Fig. 54

b.NORMAL OPERATION – 5015B thru 5026B

(1)When the operating control calls for heat, terminal #6 of both panels and both RA890F relays are energized.

(2)A component self check circuit on each RA890F relay is activated which checks the electronic network of the relay.

(3)Terminals #3 and #4 on both panels and

RA890F relays are energized. Terminal #3 opens pilot line solenoid valve supplying gas to the Q179C pilot. Terminal #4 energizes the ignition transformer creating electric spark ignition at the Q179C pilot.

(4)Flame rod circuit between each Q179C pilot and terminal “F” on its respective RA890F proves presence of flame electronically at its Q179C pilot.

(5)Terminal #4 to ignition transformer is de- energized after flame is proven at its Q179C.

(6)Terminal #5 on each RA890F is energized supplying power to its respective main gas valves. “Main Gas Valve” panel lamps will light providing “Main Gas Valve” switches are “ON” (circuits closed).

(7)Main gas valves open and main burners are ignited by the pilot flames.

(8)When the operating control is satisfied, terminals #6 and all other terminals on both RA890F relays and panels are de-energized.

“Main Gas Valve” lamps go “OFF”, the main gas valves and pilot valve for each gas train are closed and main burners and pilot burner flames are extinguished.

(9)“Main Power” lamp remains lighted.

c.SAFETY SHUTDOWN

(1)SAFETY SWITCH CIRCUIT

Make sure all manual resets are activated where applicable.

(2) PILOT FAILURE

 

(a)

Pilot failure can only occur during the

 

 

operating cycle of the boiler. Any pilot

 

 

failure on either of the Q179C Electronic

 

 

Pilot, after ignition of pilot flame, will close

 

 

the pilot valve and the main gas valves

 

 

controlled by that particular RA890F relay

 

 

in 0.8 second. The burners controlled by the

 

 

other RA890F will continue to burn.

 

(b)

For 15 seconds, after failure of a Q179C

 

 

pilot, the relay through terminals #3 and

 

 

#4 will try to re-establish pilot flame. If no

 

 

pilot flame can be sensed by the flame rod

 

 

circuit in 15 seconds, terminals #3 and #4

 

 

are de-energized, and the relay will lock out

 

 

on safety. “Pilot Failure Alarm Lamp” will

 

 

be activated.

 

(c)

Pilot failure is caused by the following:

 

 

(1)

Complete loss of gas supply.

 

 

(2)

Poor ignition spark caused by low

 

 

 

voltage, poor ground connection, faulty

 

 

 

wiring, and possibly a defective ignition

 

 

 

transformer.

 

 

(3)

Low gas pressure will prevent flame rod

 

 

 

circuit from sensing pilot flame properly.

 

 

(4)

Unusually strong secondary air drafts

 

 

 

can blow the pilot flame away from the

 

 

 

rod momentarily causing nuisance shut-

 

 

 

down.

 

 

(5) A pilot line solenoid valve will not open

 

 

 

because of faulty wiring, low voltage, or

 

 

 

possibly the valve is defective.

 

 

(6) A defective RA890 may be the cause

 

 

 

but items (1) thru (5) should be followed

 

 

 

first. See also RA890 relay literature

 

 

 

furnished with the panel system.

 

 

(7)

By referring to the Sequence of

 

 

 

Operations, step by step operation

 

 

 

of the system can be controlled and

 

 

 

the cause of pilot failure can be readily

 

 

 

found. After the cause of pilot failure

 

 

 

has been corrected, resume normal

 

 

 

operation by following the Lighting

 

 

 

Instructions on the panel.

d. SHUTDOWN INSTRUCTIONS

(1)

Turn off all switches on both panels.

(2)

Close manual shut-off valve and pilot valve.

68

If limit control, low water cut-off or any other electrical safety switch opens, power to terminal #6 and all other terminals on both RA890 relays and panels is interrupted de-energizing the main gas valves and pilot valves. Main gas burners and pilot burners are immediately extinguished. Normal operation can be resumed when the cause of safety switch malfunction is corrected.

13. THERMOCOUPLE CONTROL SYSTEM (Canada

Only)

The 5006B thru 5013B boilers are equipped with

a Thermocouple Control System that utilizes a

constant-burning Q327A pilot, a Q309 thermocouple, and a L62GB-3C Pilot Safety Switch. The Q309

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Contents Series 5B Section I Equipment Check List Important Information Canadian Equipment Check List Canadian Equipment Check List Dimensional Data Natural GAS Maximum 14 W.C. Minimum 5.5 W.CDo not Install this Boiler on Carpeting Provide Combustion and Ventilation AIRBASE-BURNER-MANIFOLD Assemblys Single Manifold Base 5006B Thru 5014B Section BoilersLEH Section on Base Assembly of Center Sections Dual Manifold Bases 5015B Thru 5026B Section BoilersArrangement of Sections and Canopys Open Steam or Water Trim Carton Purpose of Tappings and Their LocationsConnect Supply and Return Piping to Heating System Installation of BUILT-IN HeaterTesting Boiler Assembly for Leaks Oxygen Corrosion Sealing of BASE, Installation Flue Covers and CanopiesAttachment of Flue Covers Page Page Page Page Recommended Water Boiler Piping Supply Connection & I Return ConnectionSupply Connections & 2 Return Connections Sizes 5006B Thru 5019BInstallation of Jacket Parts Common to ALL Boiler Sizes Installation of Jacket Support Brackets to Base END PanelsPage Exploded View of Jacket 6 Thru 10 Section Boilers Securing of CANOPY/DRAFTHOOD CANOPY/DRAFTHOOD Mounting Diagram Exploded View of Jacket 11 Thru 19 SECT. Boilers Completion of Jacket Installation 11 Thru 26 Section Boilers Exploded View of Jacket 20 Thru 22 SECT. Boilers Exploded View of Jacket 26 SECT. Boilers Shutoff Valve Between Safety Valve Steam Trim and ControlsMounting Elevations of M&M 150 and a 67M Float Lwco Water Trim and Controls Recommended Piping to BUILT-IN Tankless Heaters Open GAS Train CartonsOpen Gas Controls Cartons Installation of S8610M Module Pilot Piping EI Control System Robertshaw7000 A B Thru 5009BPilot Piping EI Control System V88A A B Thru 5026B NAT. GAS Canada 5006B Thru 5026B NAT. GASPilot Piping EO Control System Installation of Pilot Safety SwitchInstallation of Pilot Safety Switch EO Control System Installation of EO and EE Mounting Bracket and Controls EE Control SystemSect. and larger boilers Pilot Piping EE Control SystemInstallation of Pilot Safety Switch EOP Control System Pilot Piping EOP Control SystemEEP Control System Pilot Piping EEP Control SystemPage Venting Single Vent System Manifold Vent SystemPage Section IV Operation GeneralTable IV Water Content Condensation Control VariationsBe sure power is off when checking high voltage connections A B Thru 5009B Schematic Wiring Diagram EI Control System V88 GAS Train Sequence of OperationA B Thru 5014B Canada 5006B Thru 5014BSchematic wiring diagram 15 Thru 26 SECT. Boilers EI Control SystemSequence of Operation Page Safety Switch Circuit Pilot FailureWiring diagram 6 Thru 14 SECT. Boilers Proceed to Paragraph 15- Minimum Input Wiring diagram 15 Thru 26 SECT. Boilers Operating and safety controls. Should any EE Control System Wiring diagram 15 Thru 26 SECT. Boilers Proceed to Paragraph 15- Minimum Input Wiring Diagram 6 Thru 14 SECT. Boilers EOP Control System Turn on Main Power Switch. Main Power Light will light Wiring Diagram 15 Thru 26 SECT. Boilers EOP Control System Safety Switch Circuit Wiring Diagram 6 Thru 14 SECT. Boilers EEP Control System Pilot Failure Safety Switch Circuit Wiring Diagram 15 Thru 26 SECT. Boilers EEP Control System Make sure all manual resets are activated where applicable Normal Operation Sequence Page Check GAS Input Rate to Boiler Minimum Input Adjustments V8944B Combination ValveMotorized Modulating Actuator ScrewTest Ignition System Safety SHUT-OFF Device AS Follows Thermocouple Pilot System Combustion Chamber BURN-OFFSection V Service Removal of Jacket Front PanelAvoid Breathing Fiber Particulates and Dust Cleaning of Flueways LubricationPilot Locations Main Burner Flame Adjustment Pilot Flame Honeywell Q3481BPilot Flame Honeywell Q179D Pilot w/THERMOCOUPLEPilot Flame Honeywell Q179C Pilot Honeywell Q327A Pilot w/THERMOCOUPLEDo not drain water below gauge glass Base Parts JacketsSeries 5B Base Parts 5006B thru 5014B Number in in Table Relates to Corresponding NumberBase Parts Series 5B Base Parts 5015B thru 5026B 5015B 5016B 5017B 5018B 5019B 5020B 5021B 5022B 5024B 5026BBase Parts Canopy Boiler Size Quantity Part SizeIntegral Canopy Drafthoods & Sections Series 5B Section Replacement Chart Series 5B Base / Pilot Assemblies Series 5B Jackets 60413075 5007B Lower Top Panel 2 x 37-3/16 60413085 5008B 2 x 20-7/8 Complete Jackets Jackets Boiler Size Boiler Size 5006B 5008B 5009B 5014B 5015B 5016B 5017B 5026BV88A GAS Trains Canada Natural GAS only Fluid Power GAS Trains USA 100 5006B 5009B 5015B 5016B 5017B101 Diaphragm Valve LO-HI-LO GAS Train Canada Natural GAS onlyFluid Power GAS Trains Canada 102103 Ignition Module & Support Bracket EI Control SystemDescription Manifold Module Support L62GB-3C Pilot Safety Switch104 105 A. 5010B-5026B NAT. GAS Canada 5006B-5026B NAT. GAS106 Transformer & Pilot Line Regulator EO Control System107 108 109 110 111 EOP & EEP Control PanelEI Control System Pilot Assembly 112EI GAS 1136236007 NAT. GAS Not Available for LP 1146236003 NAT. GAS Date Service Performed 115Limited Warranty 116
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