resideo L7224A Installation Instructions Manual

L7224A,C; L7248A,C,L Oil and Electric
Boiler
ELECTRONIC AQUASTAT
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.
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.
®
CONTROLLERS
2012 DOE Compliance and Operation
INSTALLATION INSTRUCTIONS
IMPORTANT
Use of Outdoor Temperature Reset on a tank-
less coil application requiring a Low Limit set-
ting 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.
®
68-0281-24