Brochure

58 63-8702
Aquastat
®
Controllers
L8124 Triple Aquastat
®
Relay
Immersion-type controllers that combine high limit protection with
low limit and circulator control in forced hydronic heating systems,
including domestic hot water service.
• Provide multizone control by using a separate circulator and R845
Relay for each zone.
• Include diaphragm powerhead and Micro Switch™ assembly that
respond to temperature changes in boiler water.
• Mount directly to boiler.
• Select models include large transformers and extra terminals for
supplying power to low voltage zone valves.
• Require 24 Vac thermostat with heat anticipator set at 0.2 A (plus
current draw of gas valve on L8124E).
Differential Temperature: High limit: 10°F fixed; low limit: 10-25°F adj.
Frequency: 60 Hz
Electrical Connections: Quick Connect/Screw
Switching Action: SPST: High Limit
SPDT: Low Limit and Circulator Control
Maximum Safe Operating Pressure (psi): 200 psi on outside of
immersion well, 100 psi on capsule if inserted directly.
Maximum Safe Operating Pressure (kPa): 1378 kPa on outside of
immersion well, 690 kPa on capsule if inserted directly.
Electrical Ratings, Circulator:
At Full Load – 7.4 A @ 120 Vac: 3.7 A @ 240 Vac;
At Locked Rotor – 44.4 A @ 120 Vac: 22.2 A @ 240 Vac
Electrical Ratings, Burner:
At Full Load – 7.4 A @ 120 Vac: 3.7 A @ 240 Vac;
At Locked Rotor – 44.4 A @ 120 Vac: 22.2 A @ 240 Vac
Operating Humidity Range (% RH): 0 to 95% RH, non-condensing
Operating Temperature Range:
High Limit – 130°F to 240°F (54°C to 116°C) adjustable;
Low Limit – 110°F to 220°F (43°C to 104°C) adjustable
Temperature Range: Maximum Ambient temp case: 150°F (66°C);
Maximum Sensing element 265°F (129°C)
Approvals, Underwriters Laboratories Inc.: UL Listed (models with
well): File No. MP466, Guide No. MBPR; UL Component Recognized
(models without well): File No. MP466, Guide No. MBPR2
Approvals, CSA: File No. 095329
Material Number Application Burner Control Voltage
Insulation Depth
Mounting
L8124A1007/U High Limit Protection, Low Limit and Circulation Control 120 Vac; 60 Hz 1 1/2 in. (38 mm) Vertical Mount
L8124A1015/U High Limit Protection, Low Limit and Circulation Control 120 Vac; 60 Hz 3 in. (76 mm) Vertical Mount
L8124C1003/U Triple Aquastat Relay with High limit 120 Vac; 60 Hz 1-1/2 in (38 mm) Horizontal
L8124E1016/U Triple Aquastat Relay with High limit 120 Vac; 60 Hz – Vertical Mount
L8124G1020/U Triple Aquastat Relay with High limit 120 Vac; 60 Hz – Vertical Mount
L8124L1011/U Triple Aquastat Relay with High limit 120 Vac; 60 Hz – Horizontal