Honeywell L4188A Manuals

PRODUCT DATA 68-0061—1 L4188A,B; L4189A,B; L6188A-C; L6189A-C Aquastat® Controllers APPLICATION Aquastat® Controllers are bulb-type providing operating or limit control of water temperature in hot water heating systems and water heaters. FEATURES • L4188 and L4189 provide spst switching for high and low limit control. • L6188 and L6189 provide spst switching for low limit and circulator control. • L4188, L6188 models are direct-mounted. • L4189, L6189 models are remote bulb. • Diaphragm-operated switch breaks on temperature rise (spst and normally closed spdt contacts). • Compact controller case for application flexibility. • 3/16 in. diameter bulb for faster response. • All models available with or without setting knob. Models without knob are adjusted with screwdriver. • Choice of manual or auto reset. Auto reset models available with fixed or adjustable differential. • 1/4 in. male quick-connects standard; combination screw and 1/4 in. quick-connects available. • Field adjustable high or low limit stop available. • Bracket for surface mounting available on remote bulb models. • Capillary on remote bulb models available in several lengths. • Immersion well with 1/2 in. NPT spud available as accessory. Direct Mount with Setting Knob Contents Application......................................................................... 1 Features ............................................................................ 1 Specifications .................................................................... 2 Ordering Information ......................................................... 2 Installation ......................................................................... 4 Wiring ................................................................................ 6 Operation........................................................................... 7 Adjustments....................................................................... 7 Checkout ........................................................................... 8 Remote Bulb with Screwdriver Slot

0 Honeywell THESE BULB-TYPE CONTROLLERS PRO- VIDE OPERATING OR LIMIT CONTROL OF WATER TEMPERATURE IN HOT WATER HEATING SYSTEMS AND WATER HEATERS. Cl L4188 and L4189 provide spst switching for high or low limit control. � L6188 and L6189 provide spdt switching for low limit and circulator control. Cl L4188, L6188 models are direct- mounted. 0 L4189, L6189 models are remote bulb. Cl Diaphragm-operated switch breaks on temperature rise (spst and normally closed spdt contacts). � Compact controller case for application flexibility. 0 3116 in. diameter bulb for faster response. Cl All models available with or without setting knob. Models without knob are ad- justed with screwdriver. Cl Choice of manual or auto reset. Auto reset models available with fixed or adjust- able differential. Cl l/4 in. male quick-connects standard; combination screw and l/4 in. quick- connects available. 0 Field adjustable high or low limit stop available. Cl Bracket for surface mounting available on remote bulb models. Cl Capillary on remote bulb models avail- able in several lengths. Cl Immersion well with l/2 in. NPT spud available as accessory. J.A. 2-86. Form Number 68-0061 Qlioneywell Inc. 1986