CSVB Series II - Columbia Heating

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EQUIPMENT & OPTIONAL ACCESSORIES! WARNINGBurn and scald hazard. Safety relief valve coulddischarge steam or hot water during operation.Install discharge piping per these instructions.SAFETY RELIEF VALVE [ Figure 2, Page 7 ]Safety relief valve is required on your boiler. Water expandsas it is heated. If there is no place for water to expandinto, water pressure will build up inside boiler and system.Should this happen, safety relief valve will automaticallyopen at predetermined pressure. This will relieve the strainon boiler and system. Run pipe from relief valve outlet(pipe must be same size as outlet and open end must notbe threaded) to open drain, tub or sink, or other suitabledrainage point not subject to freezing. Failure to do so maycause water damage or injury should safety relief valverelease.EXPANSION TANKExpanding water flows into expansion tank. Tank shouldbe correct size. Tank is filled with air. As water expands itcompresses air in the tank to form air pressure cushion.This “spring-like” cushion serves to maintain correctoperating water pressure regardless of water temperature.This assures “full measure” of water, even in highestradiation unit of system. It also prevents blowing off ofsafety relief valve. Air in tank in beginning (with systemfilled with cold water) is sufficient for proper operation.Tank also serves as trap for excess air in system. Airwould cause gurgling in pipes and in efficient circulation inradiators if left in system.It is possible for tank to become “waterlogged” (filledwith water). It can also become overfilled with air. Thiscan happen after filling system with new water. Fittingsprovided on tank and in line to tank are for bleeding offexcess water or air.When installing this tank, it is important:1. Tank be higher than boiler top.2. Pipe to tank continuously rises up to tank (so aircan “bubble” up to it).DIAPHRAGM TYPE EXPANSION TANKDiaphragm type expansion tank takes place of conventionalexpansion tank. Carefully read instructions packed withyour tank assembly.Tank comes with 10-12 pounds per square inch air charge.This is the same as pressure produced in system byautomatic fill valve. When system is first filled, tank willcontain little or no water.As water is heated its pressure increases. It expands intotank, compressing air in tank. Compressed air cushionpermits water in system to expand as temperaturechanges. Diaphragm type tank can be mounted on airpurger fitting or at any convenient place in supply or returnline.AIR ELIMINATING FITTING (AIR PURGER)Air purger is used to remove excess air from system. Itis installed in supply line. It will eliminate air from waterbefore it reaches radiators and bleed off this air.MAIN AIR VENT FOR DOWN FLOW SYSTEMS ORDIAPHRAGM TYPE EXPANSION TANKBefore system is filled with water, there is air in pipes andradiation units. Some of it will be trapped as system isfilled . It is possible to eliminate most of this air throughair vent on radiation units. Main air vent will speed andsimplify this. Install on highest point in supply main whenall radiation is below top of boiler.AUTOMATIC FILL VALVEFor a safe, efficient operation, hot water system must becompletely filled with water. Adding new water, whenneeded can be done manually (by use of hand valve inwater supply line). Requires regular attention to system’sneeds. Automatic fill valve accomplishes this withoutattention. Install in supply line on hot water boilers only.Valve operates through water pressure differentials. It doesnot require electrical connection.DRAIN VALVEManual valve provides means of draining all water fromboiler and system. It is often installed in 3/4” tapping atbottom of end boiler section. Or it can be installed in teewhere return line enters boiler.WATER TEMPERATURE CONTROLWater temperature limit control in relay is adjustableand may be set as necessary. It may be set as low as140°F, or as high as 220°F. This depends on type andamount of radiation involved and weather conditions.CIRCULATING PUMPEvery forced hot-water system requires circulating pump.Separate pump or zone valve is required for each zone,if you have a two or more zone system. Pump must havecapacity to provide circulation required by your system.Pump is connected into main just ahead of boiler. It is alsowired to electrical system.BLOWER (Draft Inducer)Blower provides means for pulling air through boiler andexhausting flue gasses into vent system. Blower shutsoff when burners are not firing. This keeps heat in houserather than having it go up chimney.30
PRESSURE SWITCHAir pressure switch works on negative pressure. Whenblower comes on air pressure switch operates intermittentpilot and gas valve. Air pressure switch is factory set andwill only work when blower operates properly. It will notallow boiler to come on if blower does not generate enoughpressure or if venting system is blocked.Factory Pressure Switch Set point:-0.4” wc. for 2-5 section boilers.-0.5” w.c. for 6-7 section boilers.EQUIPMENT & OPTIONAL ACCESSORIESRollout Switch(FLAME ROLLOUT SAFETY SHUTOFF)Rollout switch is temperature-sensitive fuse link device.Located on boiler base just outside fire box. In event ofheat exchanger flueway blockage causing flame to rollout of fire box, fuse does not change in appearance whenblown.If rollout switch blows, it must be replaced with exactreplacement. Check heat exchanger flueways for blockagewhen restoring system to operating condition. DO NOToperate system without rollout switch.31
Page 2: TABLE OF CONTENTSBoiler Ratings & C
Page 5 and 6: INSTALLATION PROCEDURE!WARNINGImpro
Page 7 and 8: !INSTALLATION SYSTEM PIPINGWARNINGB
Page 9 and 10: INSTALLATION SYSTEM PIPING• Insta
Page 11 and 12: VENT INSTALLATIONFigure 7 - Type B
Page 13 and 14: HORIZONTAL VENTING INSTRUCTIONSINDU
Page 15 and 16: HORIZONTAL VENTING INSTRUCTIONSFigu
Page 17 and 18: HORIZONTAL VENTING INSTRUCTIONSC. F
Page 20 and 21: GAS SUPPLY PIPINGTable 5 - NATURAL
Page 22 and 23: Sequence of Operation -See Figure 1
Page 24 and 25: STARTING YOUR BOILERNOTICEDo not ad
Page 26 and 27: CHECKING AND ADJUSTINGGas Valve Saf
Page 28 and 29: MAINTAINING YOUR BOILERBurnersBegin
Page 32 and 33: APPENDIX A - CONTROL MODULEA.1 Inst
Page 34 and 35: APPENDIX A - CONTROL MODULEA.6 Boil
Page 36 and 37: APPENDIX A - CONTROL MODULESTEP 3:
Page 38 and 39: NOTES
Page 40: COLUMBIA BOILER COMPANYMain offi ce

CSVB Series II - Columbia Heating

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