Immersion type controller provides high limit protection and low limit/circulator control in hydronic heating systems which include domestic hot water service. Installed in conjunction with a 24 volt thermostat. Mounts directly to immer- sion well; sensing bulb is 3/8 x 3”.
L8124A - Provides multi-zone control by using a separate circulator and R845 relay for each zone. Vertical mounting. L8124B - Provides single zone control. Vertical or horizontal mounting. L8124C - Provides multi-zone control by using a separate circulator and R845 relay for each zone. Horizontal mounting. L8124E - Provides multi-zone control by using a separate circulator and R845 relay for each zone. Includes 30 VA transformer and extra terminals to supply power to 24v zone valves. Vertical or horizontal mounting. L8124G - Provides multi-zone control by using a separate circulator and R845 relay for each zone. Includes 30 VA transformer and extra terminals to supply power to 24v zone valves. Vertical or horizontal mounting. L8124L- Includes ZC-ZR terminals for multi-zone control using a separate circulator and R845A relay for each zone. With large trans former and extra terminals for supplying power to low voltage zone valves.
110 to 220° 110 to 220° 110 to 220° 110 to 220° 110 to 220° 110 to 220°
L8148 Series AQUASTAT RELAY
Immersion type controller combines a high limit with an intermediate switching relay to control burner and circulator. Works in conjunction with a 24 volt thermostat, and includes transformer and accessory terminals to add a remote low limit control (L6006).High limit functions to break burner circuit when water temperature reaches limit setting. Inter- mediate relay makes burner and circulator circuits upon call for heat.
L8148A - Used for single zone control of hydronic systems with line voltage control to oil or gas burner. Mounts horizontally or verti- cally to immersion well (not included); includes well adapter and heat conductive compound. L8148E - Controls 24 volt systems and up to 3 zone valves without additional transformers. Mounts vertically to immersion well (not included); includes well adapter and heat conductive compound. L8148J - Controls 24 volt and millivolt gas fired systems and up to 3 zone valves without additional transform- ers. Mounts horizontally or vertically to immersion well (not included); includes well adapter and heat conductive compound.
CAT. NO. MFG. NO. 2C694 2C695 2C696
L8148A1017 L8148E1265 L8148J1009
HIGH LIMIT RANGE HIGH LIMIT DIFFERENTIAL VOLTAGE 140 to 240° 180 to 240° 140 to 240°
8° fixed 15° fixed 8° fixed
120 120
24 or millivolt
L4081 & L6081 Series MULTIPLE AQUASTATS
Used to control boiler water temperature in gas or oil-fired hydronic heating systems. Immersion element (3/8 x 3”) actuates two snap action micro switches for high limit, low limit and/or circulator. Mounts horizontally to immersion well (not included).
L4081A - Provides high limit and low limit control. Includes well adapter. L4081B - Provides high limit and circulator control. Includes well adapter. L6081A - Provides high limit, low limit and circulator control. Includes well adapter, dial stop and heat conductive com- pound. Electrical rating: 8.0 amps @ 120v, 5.1 amps @ 240v.
CAT. NO. MFG. NO.
2C676 2C680 2C681 2C672
742 RANGE
HIGH LIMIT DIFFERENTIAL
L4081A1023 130 to 240° Adj. L4081B1047 130 to 240° 10° fixed L4081B1096 130 to 240° Adj. L6081A1010 130 to 240° 10° fixed
SWITCHING LOW LIMIT/CIRCULATOR RANGE
SPST SPST SPST SPST
110 to 220° 110 to 220° 110 to 220° 110 to 220°
LOW LIMIT/CIRCULATOR DIFFERENTIAL 10 to 25° adj. 10 to 25° adj. 10 to 25° adj. 10 to 25° adj.