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Hersteller: Crown Dateigröße: 395.69 kb Dateiname: 7697a6ae-173b-4bde-8ca2-f0f99b760041.pdf Unterrichtssprache:

NOTE: Do not use a push type ratchet screwdriver. 1. Strip 7/16 in. of insulation from the wire end. 2. Wrap the wire at least three-fourths of the distance around the screw as shown. 3. Using a standard, flat-headed screwdriver, tighten the screw until the wire is snugly in contact with the screw and contact plate. 4. Tighten the screw an additional one-half turn. Fig. 4—Typical hookup for L8151A in a single zone system. L1 (HOT) L2 1 2 3 1 2 3 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. B1 IS 1/4 IN. TAB TERMINAL. T T ZC ZR B1 B2 C1 C2 1 2 G THERM. BURNER LINE 2 1 CIRC. LOW VOLTAGE THERMOSTAT LINE VOLTAGE CIRCULATOR X X X X X X OR OIL BURNER RELAY LINE TERMINAL LINE VOLTAGE GAS VALVE M8886 60-2553—3 4 L8151A L8151A Operation and Settings HIGH LIMIT The high limit opens and turns off the burner when the water temperature reaches the setpoint. The high limit automatically resets after the water temperature drops past the setpoint and through the 10°F (6°C) differential. WARNING CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY OR DEATH. Product is for use only in a system with a pressure relief valve. LOW LIMIT AND CIRCULATOR CONTROL On a temperature rise, with the adjustable differential at the minimum setting of 10°F (6°C), the low limit circuit (RB) breaks and the circulator circuit (R-W) makes at the control setpoint. On a temperature drop of 10°F (6°C) below the setpoint, the R-B circuit makes and the R-W circuit breaks. Fig. 5—Typical hookup for the L8151A in a multizone system. TO ADDITIONAL R845A RELAYS FOR OTHER ZONES L1 (HOT) L2 3 4 1 2 T T ZC ZR B1 B2 C1 C2 1 2 G THERMOSTAT ZONE 1THERM. BURNER CIRCULATOR ZONE 1 LINE HYDRONIC HEATING CONTROL TERMINALS 2 1 4 3 5 6 R845A RELAY THERMO- STAT ZONE 2 CIRCULATOR ZONE 2 CIRC. IF CONTROLLING TWO LOADS USE: —TERMINALS 3 AND 4 FOR LINE VOLTAGE LOAD. —TERMINALS 5 AND 6 FOR LINE 1 2 3 4 OR LOW VOLTAGE LOAD. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. LINE VOLTAGE OIL BURNER CONTROL OR GAS VALVE. B1 IS 1/4 IN. TAB TERMINAL. M8885 Fig. 6—L8151A internal schematic. 2 1 T T 1K B2 B1 ZR ZC R B WC1C2 1K1 HIGH LIMIT 1K2 LOW LIMIT CIRCULATOR CONTROL M8884 Fig. 7—Relationship of setpoints and differen tial. 240°F (116°C) SWITCH BREAKS ON TEMPERATURE RISE. BURNER TURNS OFF. HIGH LIMIT CIRCULATOR OPERATES SETTING ON A CALL FOR HEAT. SWITCH MAKES ON TEMPERATURE FALL. BURNER OPERATES ON A CALL FOR HEAT. SWITCH MAKES R-W AND BREAKS R-B ON 1TEMPERATURE RISE. SWITCH MAKES R-W AND BREAKS R-B ON TEMPERATURE RISE. SWITCH MAKES R-B AND BREAKS R-W ON TEMPERATURE FALL. BURNER IS ON TO MAINTAIN MINIMUM WATER TEMPERATURE. CIRCULATOR IS OFF. 1 WHEN WATER REACHES PROPER TEMPERATURE, THE BURNER SHUTS OFF OR THE CIRCULATOR PUMP STARTS (WHEN CALLING FOR HEAT). M1523 LOW LIMIT AND CIRCULATOR SETTING 10°F (6°C) DIFFERENTIAL 25°F (14°C) DIFFERENTIAL 10°F (6°C) DIFFERENTIAL 110°F (43°C) At any differential setting greater than 10°F (6°C), the R-B make and R-W break temperatures remain the same (control setting minus 10°F (6°C). The R-B break and R-W make temperatures are the setpoint temperatures plus the difference between the differential setting and 10°F (6°C). 5 60-2553—3 L8151A L8151A EXAMPLE: Setpoint of 140°F (60°C) differential set at THERMOSTAT ANTICIPATOR 25°F (14°C). On a temperature rise, R-B breaks and Set the thermostat heat anticipator at 0.2A. R-W makes at 155°F (68°C). On a temperature fall, R-B makes and R-W breaks at 130°F (54°C); see Fig. 7. Checkout Put the system into operation and observe each function through at least one complete cycle. Be sure the control operates as intended. Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitee 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 ...

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