Specifications

Aquastat Controllers
200 customer.honeywell.com 70-6910
L8148 Aquastat® Relay
Immersion-type controllers that combine high limit protection with
switching relay control of burner and circulator motors.
• High limit opens burner circuit only.
• Include transformer and accessory terminals for adding a remote low
limit controller.
• Case available for horizontal or vertical mounting.
• Requires a 24 Vac thermostat with heat anticipator set at 0.2A.
• TRADELINE models include well adapter, tube of heat conductive
compound and range stops.
Dimensions in inches (millimeters) Anticipator Setting: 0.2 A
Voltage: 120 Vac
Frequency: 60 Hz
Electrical Connections: Quick-Connect/Screw
Maximum Ambient Temperature: 150 F with 1.2 A 24 V load; 77 F
with 1.4 A 24 V load (66 C with 1.2 A 24 V load; 25 C with 1.4 A 24 V
load)
Setpoint Temperature Range: 240 F (116 C)
Operating Range, High Limit: 120 F to 240 F (54 C to 116 C)
Maximum Operating Pressure: Immersion Well: 255 psi (Immersion
Well: 1757 kPa)
Operating Humidity Range (% RH): 0 to 95% RH, non-condensing
Approvals:
Canadian Standards Association: Certified: File No. LR1620, Guide
No. 400-E-O
Underwriters Laboratories, Inc. UL Listed: File No. MP466, Vol. 13,
Sec. 2, Guide No. MBPR2.
Electrical Ratings
(AFL) (burner AFL) (burner ALR)
(burner
millivolt) (circulator AFL) (circulator ALR)
L8148A — — Line Voltage:
7.4 A @ 120 Vac;
3.7 A @ 240 Vac
Line Voltage:
44.4 A @ 120 Vac;
22.7 A @ 240 Vac
0.25 A @ 1/4 to
12 Vdc
3.7 A @ 240 Vac;
7.4 A @ 120 Vac
22.2 A @ 240 Vac;
44.4 A @ 120 Vac
L8148E 0.25 A @ 0.25 to
12 Vdc
22.2A @ 240 Vac;
44.4A @ 120 Vac
Low Voltage:
0.8 A max. @ 24 Vac;
Line Voltage:
7.4 A @ 120 Vac;
3.7 A @ 240 Vac
Line Voltage:
44.4 A @ 120 Vac;
22.7 A @ 240 Vac
0.25 A @ 1/4 to
12 Vdc
3.7 A @ 240 Vac;
7.4 A @ 120 Vac
22.7 A @ 240 Vac;
44.4 A @ 120 Vac
L8148J — — 3.7 A @ 240 Vac;
7.4 A @ 120 Vac
22.2 A @ 240 Vac;
44.4 A @ 120 Vac
0.25 A @ 1/4 to
12 Vdc
3.7 A @ 240 Vac;
7.4 A @ 120 Vac
22.2 A @ 240 Vac;
44.4 A @ 120 Vac
Product Number Application
Differential
Temperature Capillary Length Insulation Depth
Switching
Action Mounting Includes(F) (inch) (mm) (inch) (mm)
* L8148A1017 High Limit 8 F fixed 4 1/2 in. 114 mm 1 1/2 in. to 3
in. less well
38 mm to 76
mm less well
SPST: High
Limit &
Circulator
Horizontal —
* L8148E1265 High Limit 15 F fixed 4 1/2 in. 114 mm 1 1/2 in. to 3
in. less well
38 mm to 76
mm less well
SPST: High
Limit &
Circulator
Vertical
Mount
Molex® plug for use with
vent damper, includes heat-
conductive compound.
Molex® plug for use with
vent damper, includes heat-
conductive compound.
* TRADELINE models • SUPER TRADELINE models