Lochinvar 000 - 500 Installation & Service Manual Download Page 31

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Hydronic piping

(continued)

Installation & Service Manual

Figure 4-5_

Single Boiler - Primary / Secondary with Low Temperature Bypass

EXPANSION TANK

AIR SEPARATOR

PRESSURE REDUCING

VALVE

BACK FLOW

PREVENTER

BALL VALVE

(TYPICAL)

UNION (TYPICAL)

PRESSURE RELIEF

VALVE

FLOW CHECK

VALVE (TYPICAL)

BOILER

TEMPERATURE / PRESSURE

GAUGE

PRESSURE GAUGE

DRAIN

DRAIN POINT

(TYPICAL)

BOILER CIRCULATOR

SYSTEM SUPPLY SENSOR

(WHEN USED)

SYSTEM CIRCULATOR

STE

FRO

M S

YST

MAKE UP WATER

NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART

Y-STRAINER

(RECOMMENDED)

MAY SUBSTITUTE

LOW LOSS HEADER

LOW TEMPERATURE BYPASS

FLOW SWITCH

Primary / Secondary Piping

Please note that these illustrations are meant to show system piping concept only, the installer is responsible for all
equipment and detailing required by local codes.

NOTICE

Summary of Contents for 000 - 500

Page 1: ...and servicing of the appliance It is strongly recommended that this manual be reviewed completely before proceeding with an installation Perform steps in the order given Failure to comply could result in severe personal injury death or substantial property damage WARNING Save this manual for future reference CFA I S Rev A ...

Page 2: ...ating Boiler Installations 25 26 Piping of the Boiler System 26 Water Connections Heating Boilers Only 27 Circulator Pump Requirements 27 Circulator Pump Specifications 27 Circulator Pump Operation Heating Boilers Only 27 Primary Secondary Boiler Piping 28 Low Temperature Bypass Requirements 28 Three Way Valves 29 Boiler Flow Rates 29 Figure 4 6_Prim Sec Piping of a Single Boiler 30 Figure 4 7_Pri...

Page 3: ...per tube may be caused by too much water velocity through the tubes and is not covered by the manufacturer s warranty see Boiler Flow Rates and Temperature Rise for flow requirements Checking equipment Upon receiving equipment check for signs of shipping damage Pay particular attention to parts accompanying the appliances which may show signs of being hit or otherwise being mishandled Verify total...

Page 4: ...The equipment shall be installed in accordance with those installation regulations in force in the local area where the installation is to be made These regulations shall be carefully followed in all cases Authorities having jurisdiction shall be consulted before installations are made In the absence of such requirements the installation shall conform to the latest edition of the National Fuel Gas...

Page 5: ... test procedures prescribed by the United States Department of Energy 2 Net I B R ratings are based on net installed radiation of sufficient quantity for the requirements of the building and nothing need be added for normal piping and pickup Ratings are based on a piping and pickup allowance of 1 15 3 Copper fins require special gas venting Use only the vent materials and methods specified in the ...

Page 6: ... 2000 feet elevation Figure B High Altitude Label Location UNITEQUIPPEDFOR HIGH ALTITUDE UPTO2000FT Copper fin Specifications Model Number Note Change N to L for L P gas models Input MBH Water Content Gallons Water Connections Gas Connections Vent Size Note 1 CWN090 90 91 2 1 2 5 CWN135 135 95 2 1 2 6 CWN180 180 99 2 3 4 7 CWN199 199 1 02 2 3 4 7 CWN225 225 1 02 2 3 4 7 CWN270 270 1 06 2 3 4 8 CWN...

Page 7: ...l strip on the left side of the control panel to allow easy connection to contact points on the unit 12 Thermostat The thermostat monitors the water temperature via a temperature sensor and will initiate a call for heat when the water temperature drops below the setpoint plus the differential on the thermostat 13 Temperature gauge CW models only The temperature gauge monitors the inlet temperature...

Page 8: ...nual 8 Models CWN270 Front View Model CWN399 inside unit Model CWN399 Front View Model CWN270 inside unit The Copper fin How it works 3 1 10 9 11 5 21 15 16 22 6 12 8 4 14 23 7 13 1 3 10 16 15 21 5 11 9 6 7 13 23 4 22 14 12 8 ...

Page 9: ...nual The Copper fin How it works continued Model CBN500 inside unit Model CBN500 Front View Models CBN399 inside unit Model CBN399 Front View 3 1 20 10 16 15 11 9 5 6 12 8 14 22 23 4 7 3 1 20 10 16 15 5 11 9 6 12 4 14 8 7 23 22 ...

Page 10: ...r replacement control replacement etc 4 Appliances located in a residential garage and in adjacent spaces that open to the garage and are not part of the living space of a dwelling unit must be installed so that all burners and burner ignition devices have a minimum clearance of not less than 18 46cm above the floor The appliance must be located or protected so that it is not subject to physical d...

Page 11: ...nt openings see FIG 1 3 a Combustion air opening with a minimum free area of one square inch per 4000 Btu hr input 5 5 cm2 per kW This opening must be located within 12 30 cm of the floor b Ventilation air opening with a minimum free area of one square inch per 4000 Btu hr input 5 5 cm2 per kW This opening must be located within 12 30 cm of the ceiling Figure 1 4_Combustion Air Through Ducts 2 If ...

Page 12: ...where the appliance is installed ever be under a negative pressure Particular care should be taken where exhaust fans attic fans clothes dryers compressors air handling units etc may take away air from the appliance The combustion air supply must be completely free of any flammable vapors that may ignite or chemical fumes which may be corrosive to the appliance Common corrosive chemical fumes whic...

Page 13: ...nings shall directly communicate with the outdoors When combustion air is drawn from the outside through a duct the net free area of each of the two openings must have twice 2 times the free area required for Outside Air 2 Openings The above requirements are for the boiler only additional gas fired appliances in the equipment room will require an increase in the net free area to supply adequate co...

Page 14: ...ve the appliance s built in draft diverter exceeds the specified range in a dedicated chimney for a single appliance installation or in combined venting with other negative draft appliances a barometric damper must be in stalled to control draft Figure 2 1_Conventional Negative Draft Vertical Venting TABLE 2A VENT PIPE SIZES Input Btu hr Flue Size 90 000 5 135 000 6 180 000 7 199 999 7 225 000 7 2...

Page 15: ...is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condition c Insofar as is practical close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building Turn on clothes dryers and any other appliances not connected to the common ve...

Page 16: ...east 4 feet 1 2m below 4 feet 1 2m horizontally from or 1 foot 30cm above any door window or gravity air inlet into any building Do not terminate the vent in a window well stairwell alcove courtyard or other recessed area The vent can not terminate below grade The bottom of the vent terminal shall be located at least 12 inches 30cm above grade To avoid a blocked vent condition keep the vent cap cl...

Page 17: ... a masonry chimney Sidewall Venting This appliance is NOT approved for sidewall venting with the negative draft venting system as shipped from the factory An induced draft fan MUST be used if the installation requires that the flue gases be vented out a sidewall A properly sized and installed induced draft fan may also be used to vent the flue gases vertically if required by job site conditions Th...

Page 18: ...optional vent damper is not used on water heaters and larger input heating boilers Do not install the vent damper within 6 152 mm of combustible materials The damper position indicator must be in a visible location with access for service following installation The damper must be in an open position when appliance main burners are operating The part number for the automatic vent damper required on...

Page 19: ...re Settings Low Fire Settings Natural Gas LP Gas Natural Gas LP Gas 90 000 180 000 3 5 10 0 9 2 5 199 999 2 9 7 5 0 9 2 5 215 000 399 999 3 5 10 0 9 2 5 500 000 3 5 10 two valves N A N A Gas Pressure Test 1 The appliance must be disconnected from the gas supply piping system during any pressure testing of that system at a test pressure in excess of 1 2 PSIG 3 5kPa 2 The appliance must be isolated ...

Page 20: ...gas connections must be made with pipe joint compound resistant to the action of liquefied petroleum and natural gas All piping must comply with local codes Tubing installations must comply with approved standards and practices Reference FIG 3 1 for a typical installation Install Piping to Control 1 The gas line should be a separate line direct from the meter unless the existing gas line is of suf...

Page 21: ... c for L P gas models 4 The 500 000 Btu hr model will have two gas valves with a pressure regulator on each valve Repeat the following adjustment procedure to set the manifold pressure on each gas valve 5 Remove the pressure regulator adjustment cap screw on the gas valve See FIG 3 3 for location 6 Turn the power ON at the main disconnect switch 7 Turn gas valve control knob to ON position 8 Set t...

Page 22: ...tact gas utility gas supplier qualified installer or service agency to determine necessary steps to provide proper gas pressure to the appliance 12 If the gas supply pressure is within the specified range proceed with the following steps to return the appliance to service 13 Turn the power OFF at the main disconnect switch 14 Turn gas valve control knob to PILOT position on standing pilot models T...

Page 23: ... and adjustment is not usually required If the manifold pressure is to be adjusted follow the Gas Manifold Pressure Adjustment Procedure page 21 for proper adjustment Venting of Combination Gas Valves The combination gas valve regulator used on all models is equipped with an integral vent limiting orifice The vent limiter ensures that the volume of gas emitted from the valve does not exceed the ma...

Page 24: ...r CAUTION Avoid contact with hot discharge water FLOW SWITCH Figure 4 2_Water Flow Switch CBN315 500 A water flow switch is available as a factory supplied option on all heating boilers and water heaters see section 7 The flow switch should be wired between terminals X and B Remove the jumper between the X and B terminals on the terminal strip This wiring connection installs the flow switch in the...

Page 25: ...in 4 Locate system air vents at the highest point of the system 5 Expansion tank must be installed near the boiler and on the suction side of the pump 6 Support all water piping Placing the Boiler in Operation Filling the System All air must be purged from the system for proper operation An air scoop and air vent must be located close to the boiler outlet and there should be a minimum distance bet...

Page 26: ...4B SYSTEM TEMPERATURE RISE CHART Based on Boiler Output in Btu hr Btu hr 20 F T 30 F T 40 F T Input Output GPM Ft hd GPM Ft hd GPM Ft hd 315 000 258 300 26 0 4 1 17 3 2 2 13 0 1 3 360 000 295 200 29 7 5 4 19 8 2 5 14 9 1 5 399 999 327 180 22 0 3 6 16 5 2 0 500 000 410 000 27 6 6 6 20 7 3 5 Piping of the Boiler System The drawings in this section see FIG s 4 4 through 4 6 show typical heating boile...

Page 27: ...changer pressure drop chart Table 4C is provided to assist in proper pump selection Also provided is a System Temperature Rise Chart Table 4B This table provides GPM and boiler head loss at various temperature rises for each boiler based on Btu hr input Temperature rise is the difference in boiler inlet temperature and boiler outlet temperature while the boiler is firing Example The boiler inlet t...

Page 28: ...ystem as shown in FIG 4 4 A primary secondary piping system uses a dedicated pump to supply flow to the boiler only This pump is sized based on desired boiler flow rate heat exchanger head loss and head loss in the secondary system piping only The secondary pump installed in the boiler piping ensures a constant water flow rate to the boiler for proper operation Boiler installation with a primary s...

Page 29: ...mmended because most piping methods allow the three way valve to vary flow to the boiler This boiler is a low mass high efficiency unit which requires a constant water flow rate for proper operation Low flow rates can result in overheating of the boiler water which can cause short burner on cycles system noise and in extreme cases a knocking flash to steam These conditions can cause operational pr...

Page 30: ...AUGE DRAIN DRAIN POINT TYPICAL BOILER CIRCULATOR SYSTEM SUPPLY SENSOR WHEN USED SYSTEM CIRCULATOR TO SYSTEM FROM SYSTEM MAKE UP WATER NOT TO EXCEED 4 PIPE DIA OR MAX OF 12 APART Y STRAINER RECOMMENDED MAY SUBSTITUTE LOW LOSS HEADER FLOW SWITCH Figure 4 4_Primary Secondary Piping of a Single Boiler Please note that these illustrations are meant to show system piping concept only the installer is re...

Page 31: ...RATURE PRESSURE GAUGE PRESSURE GAUGE DRAIN DRAIN POINT TYPICAL BOILER CIRCULATOR SYSTEM SUPPLY SENSOR WHEN USED SYSTEM CIRCULATOR TO SYSTEM FROM SYSTEM MAKE UP WATER NOT TO EXCEED 4 PIPE DIA OR MAX OF 12 APART Y STRAINER RECOMMENDED MAY SUBSTITUTE LOW LOSS HEADER LOW TEMPERATURE BYPASS FLOW SWITCH Primary Secondary Piping Please note that these illustrations are meant to show system piping concept...

Page 32: ...T WATER OUT MAKE UP WATER Y STRAINER RECOMMENDED TYPICAL TEMPERATURE LOOP 1 TEMPERATURE LOOP 2 TEMPERATURE LOOP 3 BOILER 2 TO SYSTEM FROM SYSTEM DOMESTIC HOT WATER CIRCULATOR BOILER CIRCULATOR TEMPERATURE PRESSURE GAUGE TYPICAL UNION TYPICAL ANTI SCALD MIXING VALVE SYSTEM SUPPLY SENSOR WHEN USED PRESSURE RELIEF VALVE MAY SUBSTITUTE LOW LOSS HEADER NOT EXCEED 12 APART DRAIN FLOW CHECK VALVE Please ...

Page 33: ...each set point adjustment to ensure proper operation Room Thermostat or Remote Thermostat Connection to Terminal Strip A room thermostat or remote temperature control may be connected to the boiler The room thermostat should be installed on an inside wall away from the influences of drafts hot or cold water pipes lighting fixtures televisions sun rays or fireplaces Follow the manufacturers instruc...

Page 34: ... CONTROL Figure 5 2_Control Panel Assembly 90 135 000 BTU hr Figure 5 3_Intermittent Pilot System 500 000 Btu hr Control Panel Temperature Adjustment Operating Temperature Control NOTICE The temperature controller is pre set at the factory with test settings You may need to adjust the settings to meet your specific needs WARNING Return water temperatures must not be less than 140 F If lower return...

Page 35: ...ause the scale has changed to a maximum of 200 F Set Point The Set Point knob specifies the target inlet or system sensor if used water temperature in degrees Fahrenheit After the water temperature reaches the set point the temperature control shuts off the burners Differential The Differential specifies the number of degrees below the set point that the control will allow the water temperature to...

Page 36: ...e of the sensor and the back of the bulbwell Air pockets are thermally non conductive and will cause sensors to read inaccurately System Sensor The system sensor must be installed when piping the boiler in Primary Secondary fashion when using the Pump Delay option Tank Sensor Water heaters are provided with an extra temperature sensor that MUST be field installed The sensor is shipped loose in the...

Page 37: ...otating the remote thermostat sensor Feed the blue wires through the access hole located on the back of the unit NOTE It will be necessary to add additional wire to reach from the appliance to the remote water source Use twisted pair wire minimum 18 gauge or larger See Table 5A page 33 regarding distance versus wire gauge Ensure all wire insulation is trimmed to reveal at least 3 8 of exposed wire...

Page 38: ... temperature If the outdoor design and boiler design temperatures are known the Ratio setting can be calculated using the following formula Ratio boiler design temperature operator set point O A Max setting outdoor design temperature Note that the reset set point cannot exceed the maximum set point of the boiler thermostat These settings are illustrated graphically in FIG 5 7 Figure 5 7_Outdoor Ai...

Page 39: ...D FRONT OF UNIT Figure 5 8_Blocked Vent Switch Location DETAIL HEX FILLER BRACKET FLAME ROLL OUT SWITCH INTERLOCK SWITCH UPPER FRONT JACKET PANEL LOWER FRONT JACKET PANEL Figure 5 9_Flame Roll Out Flame Interlock Switch Location All units are equipped with manual reset blocked vent and flame roll out flame interlock switches These temperature switches are located in the controls compartment and in...

Page 40: ...e tight and the appliance and piping system have been properly filled 5 Ensure that discharge from the relief valve has been piped to a floor drain 6 Verify that properly sized combustion and ventilation air openings are provided and not obstructed in any way 7 Check carefully for gas leaks 8 Read the appliance s safety warnings lighting instructions and check out procedure carefully before firing...

Page 41: ...formation on page 40 If you do not smell gas go on to the next step 7 Remove the lower panel door to gain access to the pilot 8 Find the pilot Follow the metal tube from the gas valve to the pilot The pilot is located on the right side of the burner approximately centered in the burner tray Pilot Location Main Burner TOP OF FLAME SPREADER TO BE FLUSH WITH TOP OF BURNER Figure 6 2_Pilot Location 9 ...

Page 42: ...15 Re install the control panel door TO TURN OFF GAS TO APPLIANCE 1 Set the thermostat to the OFF position 2 Turn off all electric power to the appliance if service is to be performed 3 Turn the gas control knob on the gas valve clockwise to the OFF position Do not force WARNING Should overheating occur or the gas fail to shut off turn off the external manual gas valve to the appliance Safety Shut...

Page 43: ... hazards Any appliance that has been under water must be replaced Operating Instructions 1 STOP Read the safety information first 2 Remove the control panel door 3 Set the thermostat to the lowest setting OFF 4 Turn off all electrical power to the appliance 5 This appliance is equipped with an ignition device which automatically lights the pilot DO NOT try to light the pilot by hand 6a 90 000 135 ...

Page 44: ...ble Any modification or repairs will invalidate the warranty and may create hazardous conditions that result in property damage personal injury fire explosion and or toxic gases A faulty ignition module must be replaced with a new module Ignition and Control Timings F1 Standing Pilot Models thermocouple supervised Pilot Flame Failure Response Time 180 Seconds Maximum F9 Intermittent Spark Ignition...

Page 45: ...ifreeze 2 A solution of 50 propylene glycol will provide maximum protection of approximately 30 F 3 Follow the instructions from the glycol antifreeze manufacturer The quantity of glycol antifreeze required is based on total system volume including expansion tank volume 4 Glycol is more dense than water and changes the viscosity of the system The addition of glycol will decrease heat transfer and ...

Page 46: ... for the temperature to stabilize Record the difference between the inlet and outlet temperatures This difference will be the temperature rise 4 Compare the temperature rise on the heater with the required temperature rise in Table 7A Should adjustment be needed proceed as follows If the temperature rise is too high the water velocity is too low Check the following 1 Check for restrictions in the ...

Page 47: ... to be increased The tubes should not have a bright shiny copper look This would indicate that the erosion process has begun and the flow rate will need to be decreased Once the proper flow rates have been established the inspection intervals can be increased to every 30 days once a quarter or to a bi annual inspection This procedure should ensure proper operation of the unit as long as the water ...

Page 48: ...ER SUPPLY BUILDING RETURN DRAIN TEMPERATURE PRESSURE RELIEF VALVE TYPICAL FLOW SWITCH WATER HEATER CIRCULATOR STORAGE TANK WATER HEATER UNION TYPICAL BALL VALVE TYPICAL MIXING VALVE Y STRAINER RECOMMENDED Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by local codes NOTICE ...

Page 49: ...LY BUILDING RETURN DRAIN TYPICAL TEMPERATURE PRESSURE RELIEF VALVE TYPICAL FLOW SWITCH WATER HEATER CIRCULATOR STORAGE TANK TYPICAL WATER HEATER UNION TYPICAL MIXING VALVE Y STRAINER RECOMMENDED TEMPERATURE PRESSURE GAUGE RELIEF VALVE TYPICAL Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing required by lo...

Page 50: ...TYPICAL STORAGE TANK WATER HEATER UNION TYPICAL BALL VALVE TYPICAL Y STRAINER RECOMMENDED TYPICAL PRESSURE RELIEF VALVE TYPICAL TEMPERATURE PRESSURE GAUGE TYPICAL EXPANSION TANK FLOW CHECK VALVE TYPICAL COLD WATER SUPPLY MIXING VALVE BUILDING RETURN Please note that these illustrations are meant to show system piping concept only the installer is responsible for all equipment and detailing require...

Page 51: ...er cost savings for owners Tubes are always able to transfer heat at peak efficiency Every surface within this water containing section is of a nonferrous material providing clear clean rust free hot water Straight copper tubes finned on the outside for maximum heat transfer glass lined cast iron one piece cored headers make up an entirely rustproof unit On all models header inspection plugs can b...

Page 52: ...MUST be taken to prevent potential scald injury when storing water at 140 F and hotter Water temperature over 125 F 52 C can cause severe burns instantly or death from scalds Children disabled and elderly are at highest risk of being scalded See instruction manual before setting temperature at heating appliance Feel water before bathing or showering If this appliance is used to produce water that ...

Page 53: ...l supply adequate flow to make the flow switch contacts and operate the water heater Pressure Only Relief Valve This water heater hot water supply boiler is normally supplied with a temperature and pressure relief valve sized in accordance with applicable codes Units may be supplied with an optional pressure only relief valve When a water heater hot water supply boiler equipped with this optional ...

Page 54: ...he burner Perform start up checkout and performance verification per Section 6 Start up If combustion or performance indicate need Clean heat exchanger Remove and wash burner Owner maintenance see the User s Information Manual for instructions Daily Check appliance area Check pressure temperature gauge Monthly Check vent piping Check relief valve Periodically Test low water cutoff if used Reset bu...

Page 55: ...tem or appliance leaks Continual fresh makeup water will reduce appliance life Minerals can build up in sections reducing heat transfer overheating heat exchanger and causing heat exchanger failure Leaking water may also cause severe property damage 1 Inspect all water and gas piping and verify to be leak free 2 Look for signs of leaking lines and correct any problems found 3 Check gas line using ...

Page 56: ...s the valve and its components are physically removed and inspected This inspection must only be conducted by a plumbing contractor or authorized inspection agency not by the owner Failure to re inspect the boiler relief valve as directed could result in unsafe pressure buildup which can result in severe personal injury death or substantial property damage WARNING Following installation the valve ...

Page 57: ...orrected immediately Lifting Flames Lifting flames can be caused by over firing the burner s or excessive primary air If improper flame is observed examine the venting system ensure proper gas supply and adequate supply of combustion and ventilation air Combustion Air Adjustment This appliance uses an atmospheric combustion process Combustion air is provided to the burners by the gas injection pre...

Page 58: ...ent the heat exchanger must be cleaned and the cause of the soot problem corrected Proceed as follows l Remove soot from burners and bottom of the finned tubes with a stiff bristle brush Dirt may also be removed from burner ports by rinsing the burner thoroughly with water Drain and dry burners before re installing Damaged burners must be replaced An appliance installed in a dust or dirt contamina...

Page 59: ...r Circulating Pump Inspect pump every 6 months and oil if required Use SAE 30 non detergent oil or lubricant specified by pump manufacturer Pilot Flame Adjustment Procedure The pilot flame should envelop 3 8 to 1 2 10 to 13mm of the tip of the thermocouple see FIG 8 3 1 2 Figure 8 3_Pilot Flame on Thermocouple a Remove pilot adjustment cover screw on the gas valve See the Gas Valve illustrations i...

Page 60: ...rols GAS FLOW Figure 8 4_Gas Train 90 000 399 999 Btu hr Models Figure 8 5_Gas Train 500 000 Btu hr Model Review with owner 1 Review the User s Information Manual with the owner 2 Emphasize the need to perform the maintenance schedule specified in the User s Information Manual and in this manual as well 3 Remind the owner of the need to call a licensed contractor should the appliance or system exh...

Page 61: ...switch If any of these devices are open press the reset button Yes Is there 24 VAC tan wire on the 4 pin connector plug on the temperature controller Yes Check each of the following for an open X and B on the terminal strip purple and gray wires on the vent damper plug the two gray wires on the louver plug 315 and 360 models only V and P on the terminal strip auto reset high limit No Check voltage...

Page 62: ... Check for an open sensor If no open sensor make sure there s a call for heat If call for heat is present replace temperature control No Yes Check each of the following for an open X and B on the terminal strip purple and gray wires on the vent damper plug V and P on the terminal strip auto reset high limit No Check 24 VAC at R and W on the terminal strip Check each of the following for an open wh...

Page 63: ...10 Diagrams 63 Installation Service Manual Schematic Diagram F1 Unit 90 000 270 000 Btu hr Models Wiring Diagram F1 Unit 90 000 270 000 Btu hr Models ...

Page 64: ...10 Diagrams 64 Installation Service Manual Schematic Diagram F9 Unit 315 000 399 999 Btu hr Models Wiring Diagram F9 Unit 315 000 399 999 Btu hr Models ...

Page 65: ...315 000 399 999 Btu hr Models MODULE SPARK IGNITION BURNER GND 24V GND MV PV PV MV CIRCULATION R1 W1 SPILL ROLLOUT X B NO C FLOW SWITCH INLET SENSOR SYSTEM DIFFERENTIAL 240 SETPOINT 160 OFF RELAY PUMP 140 120 220 200 180 7 6 5 8 9 5 15 14 13 12 10 11 10 OFFSET HIGH FIRE 0 TANK SYS SENSOR INLET 20 15 BOX DEPICTS OPTIONAL ITEMS 24VDC Y TRANSFORMER BL SENSOR RELAY A P2 P1 1 2 1 2 3 4 OR BN BK Y T W L...

Page 66: ...66 Schematic Diagram F9 M9 Unit 500 000 Btu hr Models Wiring Diagram F9 M9 Unit 500 000 Btu hr Models 10 Diagrams Installation Service Manual ...

Page 67: ...67 Notes ...

Page 68: ...Revision A ECO C06290 initial release CFA I S Rev A 09 10 ...

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Lochinvar 000 - 500, Installation & Service Manual

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