Brochure

63-8702 53
Aquastat
®
Controllers
L4103 Combination Aquastat
®
and High Limit Controller
An immersion-type control the Aquastat
®
Controller senses water
temperature, cycles the burner through the oil primary, or provides
water temperature regulation for gas systems. The controller breaks
the circuit on a temperature rise past setpoint.
• L4103A,B,C have a sensing element and a high limit sensor with
automatic reset.
• Mounts on a horizontal immersion well in water heater wall.
• Adjustable temperature setting scale.
• Fluid-filled element operates SPST, Micro Switch™ snap-acting
switch.
• Integral, nonadjustable high limit. L4103C is an immersion
controller for gas systems.
• L4103A,B is an immersion controller for oil systems.
Dimensions in inches (millimeters)
M6806A
MAXIMUM INSERTION
3-3/8 OR 5 (86 OR 127)
INSULATION
DEPTH
2-1/4 OR 4
(57 OR 102)
1-3/8
(35)
1-13/16
(46)
1-3/16
(30)
KNOCKOUT FOR 1/2 INCH CONDUIT (6)
WELL-CLAMP SCREW
1-13/64
(31)
3-7/8
(99)
1-13/64
(31)
2-3/64 (52)
4-3/32 (104)
2-11/16 (68)
3/4
(19)
3/4-14 NPT
Operating Temperature Range: 100°F to 240°F stop set at 150°F (Scale
marked- Hot-Normal-Warm) (38°C to 116°C stop set at 66°C (scale
marked- Hot-Normal-Warm))
Electrical Ratings:
At Full Load – 8 A @ 120 Vac: 5 A @ 240 Vac;
At Locked Rotor – 48 A @ 120 Vac: 30 A @ 240 Vac
Approvals, Underwriters Laboratories Inc.: UL Component Recognized:
File No. MP466, Guide No. MBPR2.
Material Number Application Differential Temperature Well Spud Size Insulation Depth Switching Action Mounting
L4103A1019/U High Limit 7°F ± 4°F (3.9°C ±2°C) 3/4 in. NPT (19 mm
NPT)
4 in. (102 mm) SPST, contacts break
on temperature rise.
Mounts on a horizontal immersion
well in water heater wall.
L4103A1100/U High Limit 7°F ± 4°F (3.9°C ±2°C) 3/4 in. NPT (19 mm
NPT)
2 1/4 in. (57 mm) SPST, contacts break
on temperature rise.
Mounts on a horizontal immersion
well in water heater wall.