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Honeywell AQUASTAT L8124A, Product Data, Page: 4 / 16

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Honeywell AQUASTAT L8124A Product Data Download Page 4

L8124A,B,C,E,G,L,M AQUASTAT® RELAYS

60-2061—10

4

Fig. 1.  L8124 mounting dimensions in in. (mm).

Fig. 2. Immersion well dimensions. (Refer 

to form 68-0040, Wells and Fittings for 

Temperature Controllers, to order well.)

Fig. 3. Internal view of L8124A and C.

Fig. 4. Internal view of L8124B.

3-1/8

(79)

1/8 (3)

6-1/8
(156)

3-3/8

(86)

2-1/8 (54)
(VERTICAL
MOUNT)

1-1/4 (32) (HORIZONTAL 
MOUNT—BOTTOM)

KNOCKOUTS FOR
1/2 (13) CONDUIT

4-5/16  (110)

1-1/4 (32)
(VERTICAL 
MOUNT)

3-1/16 (78)
(HORIZONTAL
MOUNT)

M8925

CONTROL 
MOUNT

FITS BOILER TAPPED HOLE

1/2 OR 3/4 IN. NPT

INSULATION
LENGTH 1-1/2 
OR 3 IN.
(38 OR 76 MM)

INSERTION
LENGTH
3-3/8 IN.
(86 MM)

M1797

M8961

VOLTAGE
BARRIER

TRANSFORMER 
FOR THERMOSTAT
CIRCUIT

DIFFERENTIAL
SETTING

CIRCULATOR
RELAY

LOW LIMIT
SETTING

HIGH LIMIT 
SETTING

M8964

TRANSFORMER 
FOR THERMOSTAT
CIRCUIT

DIFFERENTIAL
SETTING

CIRCULATOR
RELAY

LOW LIMIT
SETTING

HIGH LIMIT 
SETTING

GROUND SCREW

Summary of Contents for AQUASTAT L8124A

Page 1: ...es L8124 Aquastat Relays can provide multizone control by using a separate circulator and R845 Relay for each zone All L8124 Aquastat Relays mount directly on the boiler L8124E G and L have large transformers and extra terminals for supplying power to low voltage zone valves L8124M is for use in a wood coal gas oil multifuel heating system Circulator is independently controlled by the thermostat C...

Page 2: ...anged TRADELINE Models TRADELINE models are selected and packaged for ease of handling ease of stocking and maximum replacement value TRADELINE model specifications are the same as those of standard models except as noted in Table 1 Tradeline Models Available L8124B E G L Aquastat Relays without well and spud Additional Features Heat conductive compound for better bulb response in oversized well C...

Page 3: ...11 3 1 16 78 Yes Same as L8124A G L circulator rating 120 Vac 7 4A full load 44 4A locked rotor Vertical L8124B b 6 1 8 156 4 3 8 111 3 1 16 78 0 25A at 1 4 to 12 Vdc Vertical or horizontal L8124C 120V 4 3 8 111 6 1 8 156 3 1 16 78 Yes Same as L8124A G L circulator rating 240 Vac 3 7A full load 22 2A locked rotor Horizontal L8124E 24V 6 1 8 156 4 3 8 111 3 1 16 78 Yes 2 1 25A at 24 Vac 30 VA total...

Page 4: ... 1 1 4 32 HORIZONTAL MOUNT BOTTOM KNOCKOUTS FOR 1 2 13 CONDUIT 4 5 16 110 1 1 4 32 VERTICAL MOUNT 3 1 16 78 HORIZONTAL MOUNT M8925 CONTROL MOUNT FITS BOILER TAPPED HOLE 1 2 OR 3 4 IN NPT INSULATION LENGTH 1 1 2 OR 3 IN 38 OR 76 MM INSERTION LENGTH 3 3 8 IN 86 MM M1797 M8961 VOLTAGE BARRIER TRANSFORMER FOR THERMOSTAT CIRCUIT DIFFERENTIAL SETTING CIRCULATOR RELAY LOW LIMIT SETTING HIGH LIMIT SETTING...

Page 5: ...ed in these instructions WARNING Fire or Explosion Hazard Can cause severe injury death or property damage Product is for use only in a system with a pressure relief valve WARNING Electrical Shock Hazard Can cause severe injury death or property damage Disconnect power supply before beginning installation to prevent electrical shock or equipment damage M8962 TRANSFORMER FOR THERMOSTAT CIRCUIT DIFF...

Page 6: ... mounting the case horizontally or vertically as desired See Fig 8 1 Shut off the electric power and remove the old control Leave the old immersion well in place if it is suitable for use with the L8124 either with or without an adapter A 124904 Well Adapter can be ordered separately see form 68 0040 Immersion Wells and Compression Fittings for ordering information 2 If the old well is unsuitable ...

Page 7: ...0 L8124A C single zone connections and internal schematic CONTROLLER CASE IMMERSION WELL CLAMP ADAPTER IMMERSION WELL SPUD BOILER OLD IMMERSION WELL ASSEMBLY BACK OF CONTROLLER CASE IMMERSION WELL CLAMP SCREW ADAPTER SENSING BULB HEAT CONDUCTIVE COMPOUND SETSCREW CAPILLARY TUBE C IMMERSION WELL CLAMP IMMERSION WELL CLAMP SCREW SHORT TUBE FITS IN CENTRAL RECESS OF ADAPTER BEND THE CAPILLARY TUBE TO...

Page 8: ...L T T L2 L1 C1 C2 B2 ZR ZC B1 M8822 3 2 BURNER AND IGNITION L8124A G T T F F T87F T T 1 2 3 4 5 6 T87F R845 RELAY R8184 T T 1 2 3 4 5 6 T87F R845 RELAY PUMP PUMP PUMP BLACK WHITE ORANGE C554 1 M8842 L1 HOT L2 1 3 1 2 2 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 MILLI...

Page 9: ... T B2 B1 T87F R845 RELAY T T 1 2 3 4 5 6 T87F R845 RELAY T T 1 2 3 4 5 6 T87F R845 RELAY PUMP PUMP PUMP M8803 L1 HOT L2 1 3 1 2 3 2 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 LOW VOLTAGE GAS VALVE eg VR8300 LINE VOLTAGE CIRCULATOR C2 C1 B2 B1 R B HIGH LIMIT Z 1K1 B R...

Page 10: ...d separately the low limit controls the burner circuit R B as described above while the low voltage thermostat directly controls the circulator circuit see Fig 18 SETTING AND CHECKOUT WARNING Fire or Explosion Hazard Can cause severe injury death or property damage Use product only in a system with a pressure relief valve Setting Follow the boiler manufacturer recommendation when making the L8124 ...

Page 11: ...OUND USE GROUNDING SCREW PROVIDED B1 IS 1 4 IN TAB TERMINAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE LINE VOLTAGE CIRCULATOR B2 C2 C1 ZR B1 R B HIGH LIMIT Z 1K1 B R W LOW LIMIT CIRCULATOR 1K 2 1 G T TV L8124G L ZONE 1 THERMOSTAT 1K2 V8043F TH TR TH TR ZONE 2 THERMOSTAT V8043F TH TR TH TR ZC M8804 L1 HOT L2 1 3 1 2 3 2 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED CONT...

Page 12: ...C2 C1 B2 B1 R B HIGH LIMIT ZC ZR 1K1 B R W LOW LIMIT CIRCULATOR 1K 2 2 1 4 3 5 6 1 G T T L8124A C LOW VOLTAGE THERMOSTAT 1K2 ZONE 2 LOW VOLTAGE THERMOSTAT R845A RELAY ZONE 2 ZONE 2 CIRCULATOR TO ADDITIONAL R845A RELAYS FOR OTHER ZONES M8828 L1 HOT L2 1 1 2 3 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED CONTROL CASE MUST BE CONNECTED TO EARTH GROUND USE GROUNDING SCREW ...

Page 13: ...ROTECTION AS REQUIRED CONTROL CASE MUST BE CONNECTED TO EARTH GROUND USE GROUNDING SCREW PROVIDED B1 IS 1 4 IN TAB TERMINAL 2 1 4 3 5 6 LOW VOLTAGE THERMOSTAT ZONE 1 ZONE 2 LOW VOLTAGE THERMOSTAT R845A RELAY ZONE 2 ZONE 2 CIRCULATOR TO ADDITIONAL R845A RELAYS FOR OTHER ZONES LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE LINE VOLTAGE CIRCULATOR ZONE 1 B2 C2 C1 ZR B1 R B HIGH LIMIT Z 1K1 B R W LOW LIMI...

Page 14: ...cluded with TRADELINE Aquastat Relay models MATERIAL SAFETY DATA SHEET MSDS SECTION 1 PRODUCT AND COMPANY IDENTIFICATION Product Name Heat conductive compound MSDS ID DS9021 Synonyms MS1699 Product Use Heat conductive material used to enhance contact and heat transfer in temperature sensor applications Manufacturer Honeywell Inc 1985 Douglas Drive North Minneapolis MN 55422 Date Released October 8...

Page 15: ...sts Skin Contact Remove excess with cloth or paper Wash thoroughly with mild soap and water Obtain medical attention if irritation develops and persists Ingestion Contact physician or local poison control center immediately Inhalation Remove patient to fresh air and obtain medical attention if symptoms develop Section 5 Fire Fighting Measures Flash Point 383 F 195 C Will burn if exposed to flame E...

Page 16: ...aterial pleasant odor Solubility in Water Negligible Specific Gravity 0 86 Section 10 Stability and Reactivity Stability Stable Reactivity Hazardous polymerization will not occur Incompatibilities Strong oxidizing agents and halogens Hazardous Decomposition Products Carbon dioxide carbon monoxide Section 11 Toxicology Information No data available Section 12 Ecological Information Chemical Fate In...

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