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L7148F ELECTRONIC AQUASTAT

®

 CONTROLLER

68-0189—2

6

Table 2. Sequence of Operation

Fig. 4. Wiring L7148F with multizone valves.

Thermostat

Operation 

Mode

Burner

Circulator

Off

Normal

Off

Off

Off

High Limit

Off

Off

On

Normal

On

On

On

High Limit

Off

On

Either

Reset

Off

Off

POWER SUPPLY. PROVIDE DISCONNECT MEANS 
AND OVERLOAD PROTECTION AS REQUIRED.

GROUND MUST BE AN EARTH GROUND CONNECTION.

ADD JUMPER AS SHOWN.

FOR EXTERNAL TRANSFORMER VA REQUIREMENTS, 
REFER TO APPLICATION SECTION.

B1 AND S1 ARE 3/16 INCH. QUICK CONNECT TERMINALS. 
ALL OTHER TERMINALS ARE 1/4 INCH.

C, COM, Z, B2, G ARE ALL CONNECTED INSIDE DEVICE.

R IS A CONVENIENCE TERMINAL FOR 24V HOT 
CONNECTION FOR USE WITH IGNITION CONTROLS.

1

2

3

4

5

6

7

M11475B

L1 

(HOT)

L2

1

4

3

TR 

TH

TH-TR

T87F
ZONE 3

T87F
ZONE 2

T87F
ZONE 1

END SWITCH

V8043F

3

TR 

TH

TH-TR

END SWITCH

V8043F

3

TR 

TH

TH-TR

END SWITCH

V8043F

COM

L7148F

HIGH LIMIT DIAL

2

L1

L2

DISCONNECT 
SWITCH

1

7

TO ADVANCED
FEATURE
MODULE

TO BOILER
SENSOR

24V

COM

L2X

L1X

C

R

4

OPTIONAL VENT
DAMPER PLUG

COM
BURNER
CONTROL
24V HOT

TO VALVE 
OR
IGNITION 
CONTROL

C1

G

L1 C2

L2

L2X

L1X

B2

B1

R

C

R

DATA
PORT

STATUS

THERMOSTAT

C

W

R

S1 S2

6

6

6

6

6

5

5

Содержание Electronic Aquastat L7148F

Страница 1: ...ck connect or AMP plug connections T TV and Z terminals are provided in a terminal block with screw connections Vent damper plug optional Separate high limit control not required Software defined minimum maximum limit settings External 120 Vac to 24 Vac transformer ordered separately is field replaceable and upgradable Patented limit rated 209659A B C Sensors are separately replaceable Communicati...

Страница 2: ...d feature modules L7148F Electronic Aquastat Controller with AMP plug connections with or without vent damper plug and communications port for adding advanced feature modules AMP connector on wiring board for transformer connection High Limit Setpoint Range 130 F to 240 F 54 C to 116 C Select models may be different Differential Fixed 10 F 6 C Select models may be different Operating Voltage Range...

Страница 3: ...om of well IMPORTANT The L7148F is not designed for spud mounting to the sensing well Sensor and immersion well are not provided and must be purchased separately Mounting screws must be obtained locally See Table 1 for sensor specifications The sensor is adaptable to existing immersion wells with a shell I D of 3 8 in 10 mm To order an immersion well contact your distributor or Honeywell sales rep...

Страница 4: ...tions 1 Strip 1 16 in of insulation from the wire end 2 Insert the wire under the terminal screw and contact plate 3 Using a standard flat headed screwdriver tighten the screw until the wire is firmly in contact with the screw and contact plate 4 Tighten the screw an additional one half turn For quick connect terminal connections Connect the quick connect to the appropriate terminal on the control...

Страница 5: ...l exits the high limit state and returns to the normal state when the temperature of the boiler drops to the high limit setting minus 10 F 12 C 3 Reset Detects an error condition such as an open sensor and shuts down all outputs The control continues to function and automatically restarts if the error condition is corrected High Limit The high limit switch shuts off the burner B1 B2 output when th...

Страница 6: ...ON B1 AND S1 ARE 3 16 INCH QUICK CONNECT TERMINALS ALL OTHER TERMINALS ARE 1 4 INCH C COM Z B2 G ARE ALL CONNECTED INSIDE DEVICE R IS A CONVENIENCE TERMINAL FOR 24V HOT CONNECTION FOR USE WITH IGNITION CONTROLS 1 2 3 4 5 6 7 M11475B L1 HOT L2 1 4 3 TR TH TH TR T87F ZONE 3 T87F ZONE 2 T87F ZONE 1 END SWITCH V8043F 3 TR TH TH TR END SWITCH V8043F 3 TR TH TH TR END SWITCH V8043F COM L7148F HIGH LIMIT...

Страница 7: ... 2 L1 L2 DISCONNECT SWITCH 1 6 TO ADVANCED FEATURE MODULE TO BOILER SENSOR 24V COM L2X L1X C R 5 OPTIONAL VENT DAMPER PLUG C1 G L1 C2 L2X L1X B2 B1 R C R DATA PORT STATUS THERMOSTAT C W R S1 S2 4 4 4 4 4 3 3 TR TH THTR LOW VOLTAGE GAS VALVE VR8300 L1 HOT L2 1 1 2 2 3 3 4 4 4 4 3 4 5 6 5 1 2 4 6 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED GROUND MUST BE AN EARTH GROUND...

Страница 8: ...ENSOR 120V L2X L1X C R 3 OPTIONAL VENT DAMPER PLUG COM BURNER CONTROL 24V HOT TO VALVE OR IGNITION CONTROL C1 G L1 C2 L2 L2X L1X B2 B1 R C R DATA PORT STATUS THERMOSTAT C W R S1 S2 5 5 5 5 5 4 4 L1 HOT L2 1 1 2 3 1 2 3 1 2 3 1 2 3 CIRCULATOR POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED GROUND MUST BE AN EARTH GROUND CONNECTION B1 AND S1 ARE 3 16 INCH QUICK CONNECT TERM...

Страница 9: ...NT DAMPER IS PLUGGED INTO L7148F FUSE BLOWS WHEN THERMOSTAT FIRST CLOSES AFTER FUSE BLOWS L7148F OPERATES ONLY WHEN VENT DAMPER IS CONNECTED SEE VENT DAMPER PRODUCT SPECIFICATIONS FOR INTERNAL SCHEMATICS S1 IS A 3 16 INCH QUICK CONNECT TERMINAL S2 IS 1 4 INCH THIS DEVICE HAS AMP PLUGS C COM Z B2 G ARE ALL CONNECTED INSIDE DEVICE FOR EXTERNAL TRANSFORMER VA REQUIREMENTS REFER TO APPLICATION SECTION...

Страница 10: ...NS AND OVERLOAD PROTECTION AS REQUIRED GROUND MUST BE AN EARTH GROUND CONNECTION FOR EXTERNAL TRANSFORMER VA REQUIREMENTS REFER TO APPLICATION SECTION R882C IS PROVIDED WITH NEC CLASS 1 ENCLOSURE B1 AND S1 ARE 3 16 INCH QUICK CONNECT TERMINALS ALL OTHER TERMINALS ARE 1 4 INCH C COM Z B2 G ARE ALL CONNECTED INSIDE DEVICE R IS A CONVENIENCE TERMINAL FOR 24V HOT CONNECTION FOR USE WITH IGNITION CONTR...

Страница 11: ...REQUIRED GROUND MUST BE AN EARTH GROUND CONNECTION B1 AND S1 ARE 3 16 INCH QUICK CONNECT TERMINALS ALL OTHER TERMINALS ARE 1 4 INCH C Z B2 G ARE ALL CONNECTED INSIDE DEVICE FOR EXTERNAL TRANSFORMER VA REQUIREMENTS REFER TO APPLICATION SECTION R IS A CONVENIENCE TERMINAL FOR 24V HOT CONNECTION FOR USE WITH IGNITION CONTROLS 1 2 3 4 5 6 M11479B 24 VOLT COMMON 24 VOLT HOT EFT OUTPUT 24 VOLT THERMOSTA...

Страница 12: ... STARTS THERMOSTAT OR THERMOSTAT WIRING PROBLEM CHECK SYSTEM PER INSTRUCTIONS PROVIDED WITH THERMOSTAT NO NO YES NO YES CHECK L7148F DIAGNOSTIC LED FLASHING TWO BLINKS CHECK SENSOR CONNECTIONS IF GOOD REPLACE SENSOR THREE OR FOUR BLINKS INTERNAL ERROR REPLACE L7148F L7148F IN RESET MODE WAIT FIVE MINUTES FOR CONTROL TO RESET VENT DAMPER OPEN CHECK FOR 24V AT B1 B2 YES CHECK VENT DAMPER CABLE AND C...

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