Burnham K50 manual Safety Switch Circuit

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This thermocouple will cool in 45 to 90 seconds allowing the pilot line safety valve to close. This shuts off the flow of gas to the pilot. It is in this manner that 100% shut-off is achieved. If the operating control calls for heat during this period and the “Power On” switch is still in the “ON” position this relay will automatically sense the absence of pilot flame and the “Pilot Failure Alarm Lamp” will be activated as described in paragraph

(a)above.

d.SHUTDOWN INSTRUCTIONS

(1)Turn off all switches on panel(s).

(2)Turn off manual main and pilot shut-off valves.

10.EOP CONTROL SYSTEM – 5015B thru 5026B

The 5015B thru 5026B boilers utilize two EOP Control

Systems that are interconnected electrically thru all operating and safety controls. Should any of the aforementioned controls break the power supply circuit, both EOP Control Systems would be de-energized. The succeeding paragraphs describe the function and operation of each EOP Control System. Should a pilot failure on one EOP Control System occur, the other EOP Control System would not be affected. Thus main burners on the unaffected side would ignite on a “call for heat” and would continue to operate until the operating control was satisfied.

The EOP Control System functionally is the same as the EO Control System. The RA890F Protectorelay, however, is installed in a prewired control cabinet along with a terminal strip, “main power” switch, “main gas valves” switch, “main power” lamp, “main gas valves” lamp and “pilot failure” lamp.

The RA890F Protectorelay Primary Control is a non- programming amplifying relay which, when used with the Q179D Rectification Pilot (standing or continuous burning pilot) provides solid state electronic Flame Safeguard Protection during a “call for heat” pilot failure. Should this occur, main burners will shut down within 0.8 second, “Main Gas Valves Lamp” will go off, the Protectorelay will lockout on safety shutdown within 15 seconds and the “Pilot Failure Alarm Lamp” will be lighted. The thermocouple in the Q179D pilot will cool and, within 45 to 90 seconds, will cause

the L62GB-3C Pilot Safety Switch to which it in connected, to break the electrical circuit to the main gas valves as well as shutting off the flow of gas to the pilot. Thus 100% shut-off is achieved.

On the next call for heat the Protectorelay will immediately sense the absence of pilot flame and the

“Pilot Failure Alarm Lamp” will be lighted.

a.LIGHTING INSTRUCTIONS

(1)Turn off all switches on both panels.

(2)Turn off all manual main and pilot gas valves.

Wait at least five (5) minutes before proceeding.

(3)Push safety switch reset button on both panels.

(4)Turn on one pilot gas valve. Depress button on

L62GB-3C Pilot Safety Switch to which it is connected and light pilot with match. Continue to hold button in for one minute or until pilot remains lighted after button is released. Light second pilot using same procedure.

(5)Set operating control to desired temperature or pressure.

(6)Turn on Main Power Switch. Main Power

Lamps will light.

(7)Turn on Manual Main Gas Valves.

(8)Turn on Main Gas Valve Switch on both panels to light burners. Main Gas Valve Light 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 EOP – See Fig. 52

b.NORMAL OPERATION – 5015B thru 5026B

(1)When the operating control calls for heat, terminal, #6 terminal of each RA890F Protectorelay is energized through terminals 1, 6

& 7 of their respective panel terminal strip.

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

(3)Flame rod circuit of each RA890F relay and its Q179D pilot proves the presence of pilot flame electronically.

(4)Terminal #5 on each RA890F is energized, and providing the “Main Gas Valve Switch” is “ON” (circuit closed), supplies power to its respective main gas valves.

(5)“Main Gas Valve” lamps will be lighted, main gas valves will open and main burners will be ignited by the pilot flames.

(6)When operating control is satisfied, terminals #6 and #5 on the RA890F relays are de-energized, main gas valves close and main burners are extinguished. “Main Gas Valve” lamps will go off.

(7)The Q179D pilots continue to burn.

c.SAFETY SHUTDOWN

(1) SAFETY SWITCH CIRCUIT

If limit control, Low Water Cut-off, operating control or any other electrical safety switch in the limit circuit opens, power to terminal #1 on both panels is interrupted, de-energizing both control panels causing all main gas valves on both sides to close and main gas burners are immediately extinguished. Both pilots will continue to burn. Normal operation can be resumed when the cause of the safety switch action is corrected. Make sure all manual resets are activated where involved.

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Contents Series 5B Section I Equipment Check List Important Information Canadian Equipment Check List Canadian Equipment Check List Natural GAS Maximum 14 W.C. Minimum 5.5 W.C Dimensional DataProvide Combustion and Ventilation AIR Do not Install this Boiler on CarpetingSingle Manifold Base 5006B Thru 5014B Section Boilers BASE-BURNER-MANIFOLD AssemblysDual Manifold Bases 5015B Thru 5026B Section Boilers LEH Section on Base Assembly of Center SectionsArrangement of Sections and Canopys Purpose of Tappings and Their Locations Open Steam or Water Trim CartonInstallation of BUILT-IN Heater Testing Boiler Assembly for LeaksConnect Supply and Return Piping to Heating System Sealing of BASE, Installation Flue Covers and Canopies Attachment of Flue CoversOxygen Corrosion Page Page Page Page Sizes 5006B Thru 5019B Recommended Water Boiler PipingSupply Connection & I Return Connection Supply Connections & 2 Return ConnectionsInstallation of Jacket Support Brackets to Base END Panels Installation of Jacket Parts Common to ALL Boiler SizesPage 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 Steam Trim and Controls Shutoff Valve Between Safety ValveMounting Elevations of M&M 150 and a 67M Float Lwco Water Trim and Controls Open GAS Train Cartons Recommended Piping to BUILT-IN Tankless HeatersOpen Gas Controls Cartons Pilot Piping EI Control System Robertshaw7000 A B Thru 5009B Installation of S8610M ModuleA B Thru 5026B NAT. GAS Canada 5006B Thru 5026B NAT. GAS Pilot Piping EI Control System V88AInstallation of Pilot Safety Switch Installation of Pilot Safety Switch EO Control SystemPilot Piping EO Control System EE Control System Installation of EO and EE Mounting Bracket and ControlsPilot Piping EE Control System Sect. and larger boilersPilot Piping EOP Control System Installation of Pilot Safety Switch EOP Control SystemPilot Piping EEP Control System EEP Control SystemPage Single Vent System Manifold Vent System VentingPage General Section IV OperationTable IV Water Content Control Variations CondensationBe sure power is off when checking high voltage connections A B Thru 5009B Canada 5006B Thru 5014B Schematic Wiring Diagram EI Control System V88 GAS TrainSequence of Operation A B Thru 5014BEI Control System Schematic wiring diagram 15 Thru 26 SECT. BoilersSequence of Operation Page Pilot Failure Safety Switch CircuitWiring 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 Screw Minimum Input AdjustmentsV8944B Combination Valve Motorized Modulating ActuatorTest Ignition System Safety SHUT-OFF Device AS Follows Combustion Chamber BURN-OFF Thermocouple Pilot SystemRemoval of Jacket Front Panel Section V ServiceAvoid Breathing Fiber Particulates and Dust Lubrication Cleaning of FluewaysPilot Locations Honeywell Q179D Pilot w/THERMOCOUPLE Main Burner Flame AdjustmentPilot Flame Honeywell Q3481B Pilot FlameHoneywell Q327A Pilot w/THERMOCOUPLE Pilot Flame Honeywell Q179C PilotDo not drain water below gauge glass Jackets Base PartsNumber in in Table Relates to Corresponding Number Series 5B Base Parts 5006B thru 5014BBase Parts 5015B 5016B 5017B 5018B 5019B 5020B 5021B 5022B 5024B 5026B Series 5B Base Parts 5015B thru 5026BBase Parts Boiler Size Quantity Part Size CanopyIntegral 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 5006B 5008B 5009B 5014B 5015B 5016B 5017B 5026B Boiler SizeV88A GAS Trains Canada Natural GAS only Fluid Power GAS Trains USA 5006B 5009B 5015B 5016B 5017B 100Diaphragm Valve LO-HI-LO GAS Train Canada Natural GAS only 101102 Fluid Power GAS Trains CanadaIgnition Module & Support Bracket EI Control System 103Pilot Safety Switch 104Description Manifold Module Support L62GB-3C A. 5010B-5026B NAT. GAS Canada 5006B-5026B NAT. GAS 105Transformer & Pilot Line Regulator EO Control System 106107 108 109 110 EOP & EEP Control Panel 111112 EI Control System Pilot Assembly113 6236007 NAT. GASEI GAS 114 6236003 NAT. GASNot Available for LP 115 Date Service Performed116 Limited Warranty