Specifications

Aquastat Controllers
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L7224U Oil Electronic Aquastat® Controller
The L7224U Oil Electronic Aquastat® Controller provides
electronic temperature sensing in a UL limit-rated controller with a
single sensing probe. The L7224U controls the circulator, oil
burner and boiler temperature. The L7224U replaces the L8124A,
L8124C, L7124U, L7148A, L7248A,C, L7224A,C, and L8148A
Controllers. The Aquastat Controller is intended for use in
residential-type applications. The L7224U provides status and
diagnostic information through an LED display combined with LED
lights to enhance the diagnostic process.
The L7224U is “Outdoor Temperature Reset” ready, which is
enabled when connected to the 50022037-002 Outdoor Reset
Module and C7089U Outdoor Temperature Sensor. The L7224U
can also interface with the 50022037-005 Domestic Hot Water
Module for prioritization of a domestic hot water call for heat. Ideal
for indirect tank applications.
Dimensions, Approximate: 7 1/8 in. high x 4 1/4 in. wide x 2 5/8 in.
deep (181 mm high x 109 mm wide x 67 mm deep)
Maximum Power Consumption: 2000 VA
Voltage: 120 Vac
Frequency: 60 Hz
Maximum Ambient Temperature: 150 F (66 C)
Minimum Ambient Temperature: -30 F (-9 C)
Operating Range, High Limit: 130 F to 240 F (54 C to 116 C)
Operating Range, Low Limit: 110 F to 220 F (43 C to 104 C)
Operating Humidity Range (% RH): 0 to 95% RH, non-condensing
Electrical Ratings
(burner AFL):
7.4 A @ 120 Vac
(burner ALR): 44.4 A inrush
(circulator AFL): 7.4 A @ 120 Vac
(circulator ALR): 44.4 A inrush
Approvals:
Underwriters Laboratories, Inc. Recognized
Product Number Application
Differential
Temperature
Mounting Includes(F)
L7224R1000 Oil Aquastat Controller with
Outdoor Reset Module
High limit: 5-20 F adj.; low
limit: 10-25 F adj.
Well mount, horizontal or vertical position, or flush
mounted remote from the well.
W8735S1000
L7224U1002 Oil Aquastat Controller High limit: 5-20 F adj.; low
limit: 10-25 F adj.
Well mount, horizontal or vertical position, or flush
mounted remote from the well.
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