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L7224A,C; L7248A,C,L
Oil Electronic
®
Aquastat Controllers
INSTALLATION INSTRUCTIONS
APPLICATION SPECIFICATIONS
The L7224A,C and L7248A,C,L 2012 Compliant Oil Electrical Ratings:
®
Electronic Aquastat Controllers provide electronic Voltage: 120 Vac, 60 Hz.
temperature sensing in a UL limit-rated control with a Power: 7 VA maximum at 120 Vac plus external loads.
single sensing probe. The L7224A,C and L7248A,C,L Thermostat current: 100 mA nominal at 24 Vac.
control the circulator, oil burner and
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS Accessories: INSTALLATION W8735Y1000 Wireless Outdoor Reset Kit W873ER1000 Wireless Outdoor Reset Module C7089R1013 Wireless Outdoor Temperature Sensor When Installing this Product... (requires W8735ER1000) W8735S1000 AquaReset™ Outdoor Reset Kit (includes 1. Read these instructions carefully. Failure to follow them could damage the product or cause a 50022037-002 Outdoor Reset Module and C7089U1006 Outdoor Temperature Sensor) hazard
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS IMPORTANT Immersion well must fit sensing element and SENSOR WIRES sensor must rest against bottom of well. CONTROLLER CASE BOILER New Installation IMMERSION SENSOR Order well assemblies separately; see Table 1 and form WELL no. 68-0040, Immersion Wells and Compression Fittings for Temperature Controllers. Boilers usually have tappings that allow the well to be mounted horizontally so boiler water of average temperature can circulate
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS WIRING SENSOR WIRES BOILER WARNING Electrical Shock Hazard. IMMERSION SENSOR WELL Can cause serious injury or death. Disconnect power supply before making wiring connections to prevent electrical shock or equipment damage. HEAT-CONDUCTIVE COMPOUND All wiring must comply with local electrical codes and (OPTIONAL) ordinances. Do not exceed the specifications in the Application section when wiring this control. Use wire M22026 rated fo
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS A separate electromechanical high-limit is not required in a system that uses this control to meet Underwriters Table 3. Adjustable Features. Laboratories Inc. requirements for oil-fired boiler assemblies, UL 726. Display Definition HL_ High Limit. On the L7224 models, the High Limit, Low Limit, Low Limit Differential, and Anti Short-Cycle time can be adjusted to Hdf High Limit Differential. the setting recommended by the boiler O
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS has not gone below the Low Limit setting (minus the Differential); or, ZR input is not powered with 120 Table 4. Display readout definitions. Vac (only L7248L with ELL set On). 2. High Limit: Boiler temperature went above the High Text Description Display Limit setting and has not dropped below the High Err Error Code (if one is present) Limit setting (minus the Differential). 3. Low Limit: Boiler temperature went below the Low
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS NOTE: This feature is blocked if a Domestic Hot When the Boiler temperature reaches the Frost Protection Water demand occurs. Domestic Hot Water Limit temperature plus a fixed 10 °F differential, the burner demands are serviced immediately, without is turned off unless requested to stay on due to a different any delay. demand. NOTE: When the Aquastat is connected to the oil Thermal Purge Operation primary and/or thermostat via the En
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS LINE VOLTAGE INDIRECT TANK AQUASTAT 50022037-002 L1 OUTDOOR (HOT) RESET MODULE INDIRECT TANK L1 (HOT) L2 CIRCULATOR 1 2 3 OT OT 1 L2 C7089U 2 OUTDOOR T SENSOR T3 2 1 SENSOR ZR L1 LINE L2 VOLTAGE CIRCULATOR C2 B2 C1 LINE VOLTAGE B1 OIL BURNER RELAY ZC 1 OUTDOOR RESET MODULE IS OPTIONAL. 2 FOR BEST PERFORMANCE SET DUU=”ON”. M32023 Fig. 8. L7224A,C; L7248L single heat zone with indirect water tank and circulators. Optional Outdoor Reset
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS Table 6. L7224/L7248 Controller Operating Sequence. Action System Response Thermostat calls for heat. Circulator starts when water temperature is above Low Limit setting (if applicable) or above the Thermal Purge Temperature Limit (tPL) if Thermal Purge is enabled. Boiler temperature is checked. Burner starts when water temperature is below High Limit setting minus the differential or at or below the Thermal Purge Temperature Limit (
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS . Table 8. Controller Operating Sequence with External Low Limit device connected trough the ZR terminal. Action System Response Zone Request (ZR) terminal is connected to Boiler temperature is checked. Burner starts when water temperature L1 (External Low Limit call for heat). is below High Limit setting. Circulator turns off. Boiler temperature exceeds the High Limit. Burner is turned off. Burner restarts when the water temperature d
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS Table 11. Troubleshooting Guide System Diagnostic Condition Condition Check Action Boiler is hot, Display is ON. 120 Vac at C1-C2 • 120 Vac at C1-C2, check wiring to pump. house is cold. • Wiring OK, is pump running? • If not, replace the pump. • If pump is running, check for trapped air or closed zone valves. Boiler below the Low Limit — temperature, wait for boiler to go above Low Limit temperature. Boiler above LL? If yes, check fo
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS 50022037-002 LINE VOLTAGE OUTDOOR INDIRECT RESET MODULE TANK AQUASTAT 3 2 1 1 2 3 OT OT C7089U1006 6 OUTDOOR TH9421C INDIRECT SENSOR TANK CIRCULATOR R7184 L1 L2 3 2 1 (HOT) L2 1 T LIMIT L7224 T L1 3 L2 2 T T 3 1 2 5 3 1 ENVIRACOM™ BURNER BURNER MOTOR TERMINAL MOTOR SENSOR 3 7 IGNITOR IGNITOR ZR L1 LINE 3 VOLTAGE L2 VALVE VALVE CIRCULATOR C2 4 B2 TO REMOTE CAD CAD ALARM CELL CELL C1 2 CIRCUIT B1 ZC JUNCTION BOX LEGEND SCREW TERMINAL 1
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS ELL=OFF TO ADDITIONAL R845A ZONE 2 RELAYS FOR OTHER ZONES CIRCULATOR 1 L1 (HOT) L2 R845A RELAY ZONE 2 6 5 3 4 1 2 ZONE 2 LOW VOLTAGE ENVIRACOM THERMOSTAT 4 LOW VOLTAGE TERMINALS THERMOSTAT 50022037-002 OUTDOOR 2 RESET MODULE L7248L T 1 2 3 OT OT T 3 3 2 1 C7089U1006 OUTDOOR SENSOR SENSOR ZR 50022037-005 5 DOMESTIC HOT L1 WATER MODULE LINE VOLTAGE L2 CIRCULATOR C2 1 2 3 TS TS B2 LINE C1 VOLTAGE 32003971-003 OIL BURNER B
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS 50022037-002 50022037-002 OUTDOOR DOMESTIC HOT RESET MODULE WATER MODULE MULTI-ZONE 1 2 3 TS TS 1 2 3 OT OT RELAY PANEL C7089U 7 6 OUTDOOR SENSOR 32003971-003 TEMPERATURE T T SENSOR 9 8 R7184 L1 1 (HOT) L2 T LIMIT L7224 T L1 3 L2 2 T T 3 1 2 5 3 1 ENVIRACOM™ BURNER BURNER TERMINAL MOTOR MOTOR SENSOR 3 IGNITOR IGNITOR ZR L1 LINE 3 VOLTAGE L2 VALVE VALVE CIRCULATOR C2 4 B2 TO REMOTE CAD CAD ALARM 2 CELL CELL C1 CIRCUIT B1 ZC JUNCTION
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS ELL=ON 1 L2 L1 (HOT) L6006 R LOW LIMIT CONTROLLER W B LOW VOLTAGE 2 THERMOSTAT L7248L T T3 2 1 SENSOR ZR L1 LINE VOLTAGE L2 CIRCULATOR C2 B2 LINE C1 VOLTAGE OIL BURNER B1 RELAY ZC 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. M27113 Fig. 13. L7248L External Low Limit connections. 15 68-0281EFS—05 LINE
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® L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT CONTROLLERS Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North ® U.S. Registered Trademark © 2012 Honeywell International Inc. Golden Valley, MN 55422 68-0281EFS—05 M.S. Rev. 03-12 Printed in United States customer.honeywell.com
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® Régulateurs à mazout Aquastat L7224A,C; L7248A,C,L NOTICE D'INSTALLATION APPLICATION CARACTÉRISTIQUES TECHNIQUES Les régulateurs électroniques à mazout Aquastat® L7224A,C et L7248A,C,L conformes à la réglementation Caractéristiques électriques : 2012 captent la température de façon électronique au Tension : 120 V c.a. 60 Hz sein d'un limiteur homologué UL au moyen d'une seule Alimentation : 7 VA maximum à 120 V c.a. plus charges sonde de détection. Le L7248A,C et L7248A,C,L règle la
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RÉGULATEURS À MAZOUT AQUASTAT® L7224A,C; L7248A,C,L Accessoires : INSTALLATION Nécessaire de réarmement d'extérieur sans fil W8735Y1000 Module de réarmement d'extérieur sans fil W873ER1000 Lors de l'installation du produit... Capteur de température extérieur sans fil C7089R1013 (requiert le W8735ER1000) 1. Lire attentivement ces instructions. Le fait de ne pas les suivre risque d'endommager le produit ou de Nécessaire de réarmement d'extérieur AquaReset™ W8735S1000 (inclut le module de réar
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RÉGULATEURS À MAZOUT AQUASTAT® L7224A,C; L7248A,C,L 3/4 (75) 7-1/8 (181) 6-1/2 (166) 5-11/16 (145) 3-1/32 (77) 3/8 1-3/16 (10) (30) 1-1/8 (29) 2-1/16 (53) 2-5/8 (67) 1/16 (2) 4-1/4 (109) 3-13/32 (86) 2x 1/4 (7) x 3/8 (9) M22147B Fig. 1. L7224A,C; L7248A,C,L dimensions de montage en po (mm). IMPORTANT 10. Mettre l'appareil en marche. 11. Placer la Limite haute, la Limite basse et le Différen- Le puits d'immersion doit être compatible avec tiel limite basse aux réglages recommandés par le l'élém
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RÉGULATEURS À MAZOUT AQUASTAT® L7224A,C; L7248A,C,L CÂBLAGE DU CAPTEUR CÂBLAGE DU CAPTEUR BOÎTIER DE RÉGULATEUR CHAUDIÈRE CHAUDIÈRE PUITS CAPTEUR D’IMMERSION PUITS CAPTEUR D’IMMERSION COMPOSÉ THERMOCONDUCTEUR COMPOSÉ THERMOCONDUCTEUR (EN OPTION) (EN OPTION) ATTACHE DU MF22026 PUITS D’IMMERSION MF16120 VIS DE L’ATTACHE Fig. 4. Installation du capteur de rechange. DU PUITS D’IMMERSION Fig. 2. Position du capteur dans le puits d'immersion. Installation du capteur de rechange Remplacement de l'Aqua
