Bobcat B-120A Operations Instructions

IMPORTANTREAD ALL OF THE FOLLOWING WARNINGS ANDSTATEMENTS BEFORE READING THEINSTALLATION INSTRUCTIONSWARNINGLIQUEFIED PETROLEUM (L.P.)PROPANE GAS-FIRE

BOBCAT MODELS B-120A and B-200A NON-DIRECT VENT, SIDEWALL VENTINGAll joints must be liquid and pressure tight. Use 3” dia. Certified PVC or CPVC Vent

Bobcat Models B-120A and B-200A11BOBCAT MODELS B-120A and B-200A NON-DIRECT VENT, VENTING THROUGH A ROOFAll joints must be liquid and pressure tight.

Bobcat Models B-120A and B-200A12BOBCAT MODELS B-120A and B-200A NON - DIRECT VENT, UTILIZING AN EXISTINGCHIMNEY AS A CHASEAll joints must be liquid a

Bobcat Models B-120A and B-200A13BOBCAT MODELS B-120A and B-200A - DIRECT VENT, SIDEWALL VENTINGAll joints must be liquid and pressure tight. Use 3” d

Alternate Sidewall venting for direct or non-direct venting:1. Vent and/or air intake piping may be installed per figure12a in order to provide enough

Bobcat Models B-120A and B-200AFigure 13a. Vent/Air intake termination; utilizing Certified PVC or CPVC Venting pipe for venting.Figure 13b. Vent/Air

VENT/AIR INTAKE TERMINATION FOR PVC/CPVC VENTING INSTALLATIONThis termination is designed specifically for 3” diameter PVCor CPVC Schedule 40 pipe to

Bobcat Models B-120A and B-200AB. DIRECT VENT - VENTING AND AIR INTAKE THROUGH A ROOFFigure 14 shows typical vertical venting. The vent pipe mustpass

VENTING AND AIR INTAKE SYSTEM REGULAR INSPECTIONA. Inspect the system regularly for condensation, corrosion,sagging and/or physical damage. A qualifi

At 9.1m (30 ft.) length of pipe, match requiredcapacity from table on this page (choose highercapacity, in this case is 4.3m3/hr. [152 cu. ft. per hr]

Bobcat Models B-120A and B-200A2RATINGS AND DIMENSIONSFigure 1. Dimensions dataBobcat Boiler178mm (7")58mm(2-1/4")108mm(4-1/4")102mm(4&

Figure 16a. Schematic wiring diagram.20Bobcat Models B-120A and B-200A

Bobcat Models B-120A and B-200A21Figure 16b. Boiler Control.Figure 16c. Ladder wiring diagram.

Figure 17a. Multizoning of Bobcat boiler; zone valve system.Figure 17b. Multizoning of Bobcat boiler; pump zoning system using R845A relay.22Bobcat Mo

Bobcat Models B-120A and B-200A23Figure 17c. Multizoning of Bobcat boiler; pump zoning system using R882A/B relays.Figure 17d. Single zoning of Bobcat

WATER PIPING 1. Connection of system to boiler:Primary/secondary piping of the system is mandatory, toensure the proper flow through the boiler. (See

Bobcat Models B-120A and B-200A25Figure 18. Relief Valve and Low Water Cutoff Installation25mm × 25mm × 19mm(1" × 1" × 3/4") NPT TEE

Table 2a. Recommended pump models for domestic hot water tank piping to the Bobcat model B-120A boiler.Table 2b. Recommended pump models for domestic

Bobcat Models B-120A and B-200A27Figure 20. Zoning with circulators.EXPANSION TANK(DIAPHRAGM TYPE)

Figure 21. Zoning with zone valves.EXPANSION TANK(DIAPHRAGM TYPE)DIRECTRETURN28Bobcat Models B-120A and B-200A

Bobcat Models B-120A and B-200A29Figure 22. Piping a heating-cooling system to the boiler and a chiller.EXPANSION TANK(DIAPHRAGM TYPE)DIRECTRETURN

Bobcat Models B-120A and B-200A3LOCATION AND IDENTIFICATION OF PARTSFigure 2. Location and identification of parts (model B-120A is shown)

OPERATING INSTRUCTIONSI. FILLING AND VENTING WATER SYSTEMSA. Fill the system with water. Vent or purge of air.B. Fire the boiler as soon as possible (

Bobcat Models B-120A and B-200A31Figure 23. Display BoardMODEDISPLAYDESCRIPTION & TEMPERATURE DISPLAYBoiler is in stand-by mode.Temperature displa

MODEDISPLAYDESCRIPTION & TEMPERATURE DISPLAYSpace heating supply water temperature could be changed bypressing “Up/Down” button. Settable from 90°

Bobcat Models B-120A and B-200A33MODE DISPLAYDESCRIPTIONChanging space heating post pump time. Settable from 10 to 900 seconds.(steps of 10 seconds).

68°F(20°C)Figure 24. Space Heating mode with outside sensor water set point graph.200°F(93.3°C)190°F(87.8°C)185°F(85°C)180°F(82.2°C)170°F(76.7°C)160°F

Bobcat Models B-120A and B-200A35III. INITIAL STARTSafe lighting and other performance criteria were met when testingvarious gas manifold and control

Bobcat Models B-120A and B-200A36THERMOSTAT CALLS FOR HEATCIRCULATOR(S) ON5 SECOND PRE-PURGE PERIODBOBCAT BOILER MODELS B-120A and B-200A SEQUENCE OF

Bobcat Models B-120A and B-200A37IV. CHECK COMBUSTION AND FUEL INPUT RATEA. Remove the boiler jacket front panel, by turning the 2 black screws 1/4 tu

4. If the fuel input is not at the rate specified on page 2at the minimum firing rate, then the blower speed should be adjusted to attain the specifie

Bobcat Models B-120A and B-200A39B. BLOCKING ERRORS: Indicated by an “E” in the mode display. Operation is automatically restored, once the condition

SAFETYKEEP THE BOILER AREA CLEAR AND FREE FROMCOMBUSTIBLE MATERIALS, GASOLINE AND OTHERFLAMMABLE VAPORS AND LIQUIDS.MINIMUM CLEARANCES FROM COMBUSTIBL

ERROR CODE INDICATION REMEDY30Excess Flue TemperatureCheck flue gas temperature, at the maximum firingrate and high water temperature. If the flue gas

Bobcat Models B-120A and B-200A41CARE AND MAINTENANCEThis section must be brought to the attention of the owner by theinstaller so that the owner can

GENERAL TROUBLESHOOTING GUIDE FOR SERVICE PERSONNELWARNING: Only a trained, experienced service technician should perform troubleshooting. Turn off al

Bobcat Models B-120A and B-200A43APPENDIX AThermostat Heat Anticipator SettingsFixed anticipator thermostats are not adjustable.Adjustable anticipator

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CONTAMINATION PREVENTIONThe combustion air supply must not be susceptible to contami-nation sources, whether the combustion air comes from theinterior

MOUNTING THE BOILER ON A WALLBe sure that the wall is vertically plumb and capable of carryingthe weight of the boiler and the system piping, when ful

A. NON-DIRECT VENT INSTALLATION1. Air drawn horizontally from outdoors DIRECTLYthrough an outside wall; one louvered opening near thefloor and one lou

PVC/CPVC PIPE GENERAL ASSEMBLY METHOD (AirIntake Only)The following are the recommended methods for cutting, cleaning and connecting PVC and CPVC pipe

Bobcat Models B-120A and B-200A98. The horizontal vent and air intake pipes must besupported with pipe straps, at intervals no greater than1524mm (5 f