The Honeywell L8148A,E,J Aquastat Relays are hydronic controllers that provide high-limit protection and relay control of burner and circulator motors through immersion. All models employ a 24-Vac thermostat and allow for adding remote low-limit temperature controls.
The Honeywell L8148A,E,J Aquastat Relays feature a scale range of 140 degrees Fahrenheit to 240 degrees Fahrenheit and a heat-conducive compound that promotes better bulb response in an oversized well. The case can be horizontally or vertically mounted and a high-limit dial stop is factory-set at the end of the high-limit scale. The Circulator Control Circuit at a full load is 7.4 amperes at 120 Vac and 3.7 amperes at 240 Vac, and with a locked rotor it is 44.4 amperes at 120 Vac and 22.7 amperes at 240 Vac.
The voltage and frequency of the Aquastat Relays are 120 Vac and 60 Hz, respectively. The insertion length of the unit is 3 3/8 inches, and the maximum pressure on the immersion well is 255 psi. The maximum bulb temperature is 40 degrees Fahrenheit higher than the setpoint, or up to an absolute maximum of 265 degrees Fahrenheit.
The Honeywell L8148A,E,J Aquastat Relays are approved by Underwriters Laboratories, the Canadian Standards Association and ANSI Miswiring.