L8124A,B,C,E,G,L,M Aquastat® Relays PRODUCT DATA GENERAL These immersion type controllers are for use with forced hydronic heating systems that include domestic hot water service. FEATURES • L8124 Aquastat® Relays provide high limit, low limit, and circulator control for maintaining boiler temperatures. • 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.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS SPECIFICATIONS IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS Table 1. Aquastat Relay models. No. of V8043 Can be Zone Valves Depth Used For Powered Multizone Without With Additional in. mm Circulatorsa Transformer Case Dimensions Height Burner Model Control Number Circuit in. mm Width in. mm Electrical Ratings Circulat or Mounting Circuit Burner Circuit L8124A 120V 6-1/8 156 4-3/8 111 3-1/16 78 Yes — Same as L8124A-G,L circulator rating L8124B b 6-1/8 156 4-3/8 111 3-1/16 78 — — 0.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS 2-1/8 (54) (VERTICAL MOUNT) 3-1/8 (79) VOLTAGE BARRIER 3-3/8 (86) 3-1/16 (78) (HORIZONTAL MOUNT) TRANSFORMER FOR THERMOSTAT CIRCUIT 6-1/8 (156) DIFFERENTIAL SETTING 1/8 (3) 1-1/4 (32) (VERTICAL MOUNT) CIRCULATOR RELAY 1-1/4 (32) (HORIZONTAL MOUNT—BOTTOM) LOW LIMIT SETTING KNOCKOUTS FOR 1/2 (13) CONDUIT M8961 HIGH LIMIT SETTING 4-5/16 (110) Fig. 3. Internal view of L8124A and C. M8925 Fig. 1. L8124 mounting dimensions in in. (mm).
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS GROUND SCREW VOLTAGE BARRIER TRANSFORMER FOR THERMOSTAT CIRCUIT TRANSFORMER FOR THERMOSTAT CIRCUIT DIFFERENTIAL SETTING DIFFERENTIAL SETTING CIRCULATOR RELAY LOW LIMIT SETTING CIRCULATOR RELAY HIGH LIMIT SETTING GROUND SCREW LOW LIMIT SETTING M8962 HIGH LIMIT SETTING Fig. 5. Internal view of L8124E. M8963 Fig. 7. Internal view of L8124M. TRANSFORMER FOR THERMOSTAT CIRCUIT INSTALLATION DIFFERENTIAL SETTING When Installing This Product… 1. 2.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS IMPORTANT 1. Terminals on these Aquastat relays are approved only for copper wire. 2. Immersion well must snugly fit sensing element and bulb must rest against bottom of well. Bend the tubing, if necessary, to hold bulb against the bottom of the well. Do not make a sharp bend in the tubing that can produce a break in the tubing and cause loss of fill. This condition will cause the high and low limit controllers to be made continuously.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS BACK OF CONTROLLER CASE CONTROLLER CASE IMMERSION WELL CLAMP IMMERSION WELL CLAMP BOILER 1 ADAPTER IMMERSION WELL SPUD IMMERSION WELL CLAMP SCREW OLD IMMERSION WELL ASSEMBLY ADAPTER SENSING BULB (A) (D) (C) (B) 2 HEAT-CONDUCTIVE COMPOUND CAPILLARY TUBE SETSCREW IMMERSION WELL CLAMP SCREW SHORT TUBE FITS IN CENTRAL RECESS OF ADAPTER 1 BEND THE CAPILLARY TUBE TO HOLD THE SENSING BULB IN GOOD THERMAL CONTACT WITH THE IMMERSION WELL AT POINTS (A) AND (B).
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS T87F T87F L8124A T ZC T ZR T T L1 C1 C2 B2 B1 1 2 3 2 G L2 T87F R845 RELAY 3 4 6 5 R845 RELAY T T 1 2 3 4 5 L2 L1 (HOT) 1 PUMP PUMP PUMP R8184 T F T F WHITE C554 BLACK ORANGE BURNER AND IGNITION 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. 3 B1 IS 1/4 IN. TAB TERMINAL. M8822 Fig. 11.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS T87F T87F R845 RELAY T T 1 2 3 4 5 T87F R845 RELAY 6 T T 1 2 3 4 R845 RELAY 6 5 T T 1 2 3 4 5 6 1 L1 (HOT) PUMP PUMP PUMP L2 L8124E 2 G L2 L1 T T C1 C2 B2 B1 Q313A PILOT GENERATOR THPP PP TR 3 MILLIVOLTAGE GAS VALVE (eg, VS820) 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. 3 B1 IS 1/4 IN. TAB TERMINAL.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS T87F T87F R845 RELAY T T 1 2 3 4 5 T87F R845 RELAY 6 T T 1 2 3 4 5 6 R845 RELAY T T 1 2 3 4 5 6 1 L1 (HOT) PUMP PUMP PUMP L2 2 G L2 L1 T T C1 C2 B2 B1 TH 3 TR LOW VOLTAGE GAS VALVE (eg, VR8300) L8124E AQUASTAT® RELAY 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. 3 B1 IS 1/4 IN. TAB TERMINAL. M1794A Fig. 16.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS LOW VOLTAGE THERMOSTAT ZONE 2 THERMOSTAT ZONE 1 THERMOSTAT V8043F V8043F 2 L8124M G TH TR TH TH TR TR T TR TH T 2 L1 L1 (HOT) L2 L2 1K 1 L8124G,L 3 1K1 ZC LINE VOLTAGE CIRCULATOR G TV T W Z 1 L1 (HOT) 2 L2 1 1K R B B C1 LOW LIMIT C2 B 1K1 W R HIGH LIMIT ZR LOW LIMIT/ CIRCULATOR R 3 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE B1 ZC B 1K2 HIGH LIMIT 4 R B2 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE B1 B2 C2 1 POWER SUPPLY.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS LOW VOLTAGE THERMOSTAT L2 L1 (HOT) 2 1 TO ADDITIONAL R845A RELAYS FOR OTHER ZONES L8124A,C G R845A RELAY ZONE 2 T T ZONE 2 CIRCULATOR 1 6 2 1K 5 R W B 3 1K1 LOW LIMIT/ CIRCULATOR 4 ZR ZC 1 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE B HIGH LIMIT 1K2 3 R 2 ZONE 2 LOW VOLTAGE THERMOSTAT B1 B2 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS LOW VOLTAGE THERMOSTAT ZONE 1 1 L2 L1 (HOT) TO ADDITIONAL R845A RELAYS FOR OTHER ZONES L8124L 2 G TV T Z R845A RELAY ZONE 2 ZONE 2 CIRCULATOR 1 1K 6 2 5 1K1 R W B ZR 3 LOW LIMIT/ CIRCULATOR 4 ZC B 1K2 HIGH LIMIT 1 3 R 2 B1 B2 C2 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE ZONE 2 LOW VOLTAGE THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS Material Safety Data Sheet (MSDS) for heat-conductive compound, which is included with TRADELINE Aquastat Relay models. KNOB SET AT 180°F (82°C) MATERIAL SAFETY DATA SHEET (MSDS) SETTING STOP 200 1 180 SETTING STOP ARM 220 SECTION 1. PRODUCT AND COMPANY IDENTIFICATION. 160 PROJECTION "A" 140 Product Name: Heat conductive compound. MSDS ID: DS9021. 1 SCALE MARKINGS IN FAHRENHEIT ONLY. Synonyms: MS1699. M2844 Fig. 23.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS Section 2. Composition, Information on Ingredients (Table 3). Table 3. Ingredients of Heat Conductive Compounda. Ingredients CAS Number Percent PEL TLV No.
L8124A,B,C,E,G,L,M AQUASTAT® RELAYS Section 7. Handling and Storage Incompatibilities: Store in dry place. Keep container closed when not in use. Strong oxidizing agents and halogens. Section 8. Exposure Controls and Personal Protection Hazardous Decomposition Products: Carbon dioxide, carbon monoxide. Section 11. Toxicology Information Ventilation: No data available. No special ventilation is required when working with this product. Section 12.
