Honeywell L7224A- Manual

INSTALLATION INSTRUCTIONS

68-0281-16

L7224A,C; L7248A,C,L

Oil and Electric Boiler
Electronic Aquastat

®

Controllers

APPLICATION

The L7224A,C and L7248A,C,L 2012 Compliant

Electronic Aquastat

®

Controllers provide electronic

temperature sensing in a UL limit-rated control with a

single sensing probe. The L7224A,C and L7248A,C,L

control the circulator, oil or electric burner or contactor,

and boiler temperature. The L7224/L7248 is “Outdoor

Temperature Reset” ready which is enabled when

connected to the W8735Y1000 wireless or W8735S1000

wired Outdoor Reset Kit. Outdoor Reset with the L7224/

L7248 is intended for all applications except for tankless

coil systems for domestic hot water. Compliance to 2012

DOE regulation ensures efficiency is maximized without

interfering with domestic hot water demand.

The L7224A,C and L7248A,C,L replace the L8124A,

L8124C, L7124A,C, L7148A and L8148A Controllers.

The L7224A,C and L7248A,C,L series controls provide

status and diagnostic information through an LED display

combined with LED lights as well as EnviraCOM™

communications enabled thermostats and diagnostic

tools to enhance the diagnostic process.

L7224/L7248 Aquastat Controllers are intended for use

in residential-type applications.

IMPORTANT

Use of Outdoor Temperature Reset on a tank-

less coil application requiring a Low Limit setting

will result in reduced system effectiveness and

efficiency.

SPECIFICATIONS

Electrical Ratings:

Voltage: 120 Vac, 60 Hz.

Power: 7 VA maximum at 120 Vac plus external loads.

Thermostat current: 100 mA nominal at 24 Vac.

Burner Relay:

7.4 A at 120 Vac Full Load Amperage (FLA);

44.4 A inrush Locked Rotor Amperage (LRA);

Less Ignition Load: 360 VA.

Circulator Relay:

7.4 A at 120 Vac FLA; 44.4 A inrush LRA.

Zone Controller (ZC): 7.4 A at 120 Vac FLA;

44.4 A inrush LRA.

NOTE: All loads combined cannot exceed 2000 VA.

Environmental Ratings:

Temperature: -30 °F to +150 °F (-34 °C to +66 °C).

Humidity: 0 to 95% relative humidity, noncondensing.

Approvals:

Underwriters Laboratories Inc. Component Recognized.

Canadian Underwriters Laboratories Inc. Component

Recognized.

2012 DOE Compliance and Operation

Operation of this control may delay the burner operation while the residual heat is

circulated out of the boiler.

NOTE: This operation may be different than earlier electronic Aquastat

®

revisions which did not implement thermal purge.