Honeywell AQUASTAT L6189A-C User's Manual
Contents
1. C 2 BREAKS 100 F M25424 Fig 11 Aquastat Controller Switch Action on Temperature Change ADJUSTMENTS To Set Temperature KNOB MODELS Line up the desired temperature setting with the temperature setting indicator behind the knob SCREWDRIVER SLOT MODELS Line up the pointer on the shaft with the desired temperature setting printed on the case 68 0061 1 L4188A B L4189A B L6188A C L6189A C AQUASTAT CONTROLLERS To Set Adjustable Differential if provided Use a screwdriver to turn the differential dial until the slot molded into the case lines up with the desired degrees of differential CONTROLLER DIFFERENTIAL ADJUSTMENT DIAL SETTING INDICATOR M25425 Fig 12 Twist the Screwdriver Slightly to turn the Differential Dial To Set Temperature Limit Stop if provided CAUTION Follow these instructions carefully to avoid placing the limit stop pointer on the wrong side of the setting indicator In a high limit application incorrect positioning of the pointer will cause system operation above the limit stop setting potentially resulting in overheating or related conditions e Remove the knob e Turn the controller shaft all the way counterclockwise when setting a high limit Turn it all the way clockwise when setting a low limit Find the metal limit stop on the back of the knob e Lift the limit stop slightly with a pencil or screwdriver and push to move to desired se2. aeaiia aeai 1 SPOCII CALGON a 13h cesteneibecceens che eesdeperiddneetaureeseenperqcnenenyeFaaes 2 Ordering Information ssi iiinis arenira 2 IStAN AION iriennerien iriaren aiiin 4 Alae E E E S 6 Operaatio Mienie reipiran ennio racinar iiae 7 ACJUStMONIS ore eea e eaaa EE ain 7 Checkout siroaa a eae iniiai 8 68 0061 1 L4188A B L4189A B L6188A C L6189A C AQUASTAT CONTROLLERS SPECIFICATIONS Electrical Ratings 24 Vac 120 Vac 240 Vac Full Load 2 0A 8 0 A 5 1A Locked Rotor 48 0A 30 6A Switching Diaphragm operated snap acting switch L4188 L4189 Switch breaks on temperature rise to set point remakes when temperature drops below set point and through differential L6188 L6189 Switch breaks C 1 and makes C 2 on temperature rise to set point switches back when temperature drops below set point and through differential IMPORTANT Terminals 1 4 in male quick connects standards Options specify when ordering Combination screw and 1 4 in quick connects Separate grounding terminal Temperature Setting Range 80 to 200 F 27 to 93 C 110 to 230 F 43 to 110 C and 160 to 280 F 71 to 138 C available Specify when ordering Temperature setting minus differential must be no more than 9 F 13 C below bottom of setting range Setting Scale Marked every 20 F 7 C with subdivisions every 10 F 12 C includes OFF setting Limit Stop Limits d
3. bulb unit the controller case can be mounted in a panel or with the optional bracket on any flat surface Choose a location within reach of the sensing element Allow for gradual bends and some slack in the capillary Mount the Immersion Well 1 Coat the well threads with a moderate amount of pipe dope leaving two end threads bare Teflon tape may also be used 2 Screw the immersion well into the tapping and tighten securely 68 0061 1 4 3 Refill the system Check for and correct any leaks i Fig 2 Use good Piping Practice when Installing Immersion Well USE MODERATE AMOUNT OF PIPE COMPOUND LEAVE 2 END THREADS BARE M25415 To Install Direct Mount Controller 1 Slide the sensing bulb all the way into the well The metal collar around the capillary should slip into the well spud 2 Line up the case so the setting indicator is on top 3 Tighten the setscrew in the well spud snugly against the metal collar CONTROLLER SETSCREW SPUD WELL BULB METAL COLLAR CAPILLARY M25416 Fig 3 The Direct Mount Model is held in place by the Setscrew in the Well Spud To Mount Remote Bulb Controller si Sensing Bulb in Well Slide sensing bulb into well Make sure bulb rests against the bottom of the well Don t bend the capillary where it connects to the bulb 2 Hold bulb in place and tighten setscrew all the way down It won t fit tight against the capillary but it will
4. plate in Fig 6 as a guide MANUAL RESET MODELS ONLY Drill a fourth hole to make the manual reset button accessible 3 ADJUSTABLE DIFFERENTIAL MODELS ONLY Drill a hole for the differential dial if desired Set the differential See Adjustment and Checkout section Hold controller against back of panel with terminals pointed down and fasten with two No 8 sheetmetal screws not supplied Refer to Fig 6 68 0061 1 L4188A B L4189A B L6188A C L6189A C AQUASTAT CONTROLLERS MOUNTING TEMPLATE A DRILL 2 MOUNTING SCREW HOLES A DRILL HOLE FOR SLOTTED SHAFT USE SMALL HOLE FOR SHAFT ONLY LARGE HOLE SHAFT PLUS SETTING SCALE AY DRILL SMALL HOLE FOR MODEL WITH MANUAL RESET BUTTON OR LARGE HOLE FOR MODEL WITH DIFFERENTIAL ADJUSTMENT CONTROLLER SLOTTED NO 8 MOUNTING SCREWS 2 OBTAIN LOCALLY M25419 Fig 6 Drill holes in the Panel as shown Mounting on Panel Controller with Bracket 1 Using controller bracket as a template mark and drill two holes in the panel 2 Mount controller with terminals down 3 Run capillary neatly along panel avoiding sharp bends and interference with other components on the panel 4 MODELS WITH TEMPERATURE LIMIT STOP ONLY Adjust to desired setting as described under To Set Temperature Limit Stop page 8 68 0061 1 6 NO 10 SHEETMETAL SCREWS 2 Oe OBTAIN LOCALLY CAPILLARY CONTROLLER M25420 Fig 7 The Controller with Brac
5. Honeywell L4188A B L4189A B L6188A C L6189A C Aquastat Controllers Remote Bulb with Screwdriver Slot Direct Mount with Setting Knob APPLICATION Aquastat Controllers are bulb type providing operating or limit control of water temperature in hot water heating systems and water heaters PRODUCT DATA FEATURES e L4188 and L4189 provide spst switching for high and low limit control e L6188 and L6189 provide spst switching for low limit and circulator control e L4188 L6188 models are direct mounted e L4189 L6189 models are remote bulb e Diaphragm operated switch breaks on temperature rise spst and normally closed spdt contacts e Compact controller case for application flexibility e 3 16 in diameter bulb for faster response All models available with or without setting knob Models without knob are adjusted with screwdriver e Choice of manual or auto reset Auto reset models available with fixed or adjustable differential e 1 4 in male quick connects standard combination screw and 1 4 in quick connects available e Field adjustable high or low limit stop available e Bracket for surface mounting available on remote bulb models e Capillary on remote bulb models available in several lengths e Immersion well with 1 2 in NPT spud available as accessory Contents APPliCation eee ceceeeeteeeeeeeeeeneeeeeeeeeesneeeseaeeeseeeeensaeeeeenaes 1 FG AUICS uigrana aon
6. TRADELINE Catalog or price sheets for complete ordering number If you have additional questions need further information or would like to comment on our products or services please write or phone 1 Your local Honeywell Automation and Control Products Sales Office check white pages of your phone directory 2 Honeywell Customer Care 1885 Douglas Drive North Minneapolis Minnesota 55422 4386 In Canada Honeywell Limited Honeywell Limit e 35 Dynamic Drive Toronto Ontario M1V 429 International Sales and Service Offices in all principal cities of the world Manufacturing in Australia Canada Finland France Germany Japan Mexico Netherlands Spain Taiwan United Kingdom U S A 68 0061 1 2 L4188A B L4189A B L6188A C L6189A C AQUASTAT CONTROLLERS Ambient Temperature Range 32 to 158 F 0 to 70 C Dimensions See Fig 1 Mounting Must be mounted in an enclosure that meets local Sensing Bulb Liquid filled copper See Fig 1 electrical codes Direct Unit mounts on immersion well at desired sensing Underwriters Laboratories Inc Component Recognized location File No MP466 Guide No MBPR Remote bulb Sensing bulb is inserted into immersion well at desired sensing location Controller case mounts Canadian Standards Association Listed File No LR62051 1 behind remote panel with two self tapping M4 or No 8 sheetmetal screws supplied Optional mounting bracket allows mounting on front of panel Spe
7. cify bracket when ordering KNOB MODEL 2 11 16 1 1 4 19 32 32 15 11 16 3 16 5 Tt 4 101 SEE TABLE 1 718 48 TABLE gt 4 101 HOLE FOR UP TO NO 10 SCREW 3 16 5 A OPTIONAL MOUNTING BRACKET PART NO SPUD INSULATION INSERTION 45900409 003B 1 2 in BSPT 1 in 3 1 2 in 45900409 009B 1 2 in NPT 1 1 2 in 3 in 45900409 010B 3 4 in NPT 1 1 2 in 3 in MODEL CAPILLARY LENGTH MOUNTING DIRECT MOUNT 1 3 16 IN 30 MM USE IMMERSION WELLS SHOWN AT RIGHT L4188 L5188 2 5 16 IN 50 MM REMOTE MOUNT 39 3 8 IN 1000 MM USE IMMERSION WELLS SHOWN AT RIGHT L4189 L5189 50 IN 1500 MM OR CAPILLARY COMPRESSION FITTINGS 78 11 16 IN 2000 MM M25414 Fig 1 Dimensions in in mm in brackets of Aquastat Controller and Immersion Well 3 68 0061 1 L4188A B L4189A B L6188A C L6189A C AQUASTAT CONTROLLERS Accessories order separately Capillary compression fittings Part No 104484A 1 2 in NPT spud Part No 104484B 3 4 in NPT spud Immersion well Pressure rating 255 psi 1760 kPa Part No 45900409 003B 1 2 in BSPT spud 1 in insulation 3 1 2 in insertion Part No 45900409 009B 1 2 in NPT spud 1 1 2 in insulation 3 in insertion Part No 45900409 010B 3 4 in NPT spud 1 1 2 in insulation 3 in in
8. estic Hot Water OPERATION As the liquid filing the sensing bulb and capillary expands and contracts it moves a diaphragm Movement of the diaphragm is transferred by a lever to the snap acting switch in the controller High or Low Limit Action L4188 L4189 The normally closed C 1 contacts open on temperature rise to the set point shutting off power to the controlled circuit On auto recycle models the switch closes C 1 after the temperature falls past the set point and through the differential See Fig 11 Low Limit Circulator Action L6188 L6189 The low limit is connected to the normally closed C 1 contacts and the circulator to the normally open C 2 contacts As long as the temperature at the sensing bulb is above set point the circulator runs If sensing bulb temperature falls past the set point and through the differential the switch breaks C 2 to turn off the circulator and makes C 1 to turn on the burner When the temperature rises to the set point C 2 makes to turn on the circulator and C 1 breaks to turn off the burner On manual reset models the reset button must be pushed before contacts C 1 will close See Fig 11 TEMPERATURE SETTING SCALE L4188 9 L6188 9 220 F HIGH OR LOW LOW LIMIT LIMIT CIRCULATOR 2 SETPOINT 4 flo 4 SETPONT h Ap C 1 C of MANUAL 1 RESET BREAKS BREAKS MAKES C 1 C 1 C 2 MAKES O AUTO SET POINT 20 O LESS Cc DIFFERENTIAL 1 DIFFER MAKES ENTIAL C 1 MAKES
9. ial rotation beyond desired high or low limit temperature Can be set at 5 F 2 5 C intervals Optional available on models with knob only Specify when ordering The specifications given in this publication do not include normal manufacturing tolerances Therefore this unit may not match the listed specifications exactly Also this product is tested and calibrated under closely controlled conditions and some minor differences in performance can be expected if those conditions are changed MODELS See Table 1 Table 1 Aquastat Controller Selection Guide Model Application Switching Mounting Setting Differential L4188A High or low limit Spst breaks on Direct Knob 7 14 or 22 F 14 10 or 6 C L4188B temp rise Screwdriver slot fixed L4189A Remote bulb Knob L4189B Screwdriver slot L6188A Low limit and Spdt breaks C 1 Direct Knob 7 14 or 22 F 14 10 or 6 C L6188B circulator makes C 2 on Screwdriver slot fixed 7 18 F 16 8 C temp rise adjustable L6188C Manual reset L6189A Remote bulb Knob 7 14 or 22 F 14 10 or 6 C L6189B Screwdriver slot _ fixed 7 18 F 16 8 C adjustable L6189C Manual reset a Specify when ordering ORDERING INFORMATION When purchasing replacement and modernization products from your TRADELINE wholesaler or distributor refer to the
10. keep the bulb from sliding out SETSCREW SPUD iA CAPILLARY SETSCREW WELL CAPILLARY M25417 Fig 4 The Setscrew keeps the Remote Sensing Bulb in the Well L4188A B L4189A B L6188A C L6189A C AQUASTAT CONTROLLERS Mounting Behind Panel Controller with Knob NOTE The panel can be up to 5 64 in thick 1 Uncoil capillary starting at bulb Avoid sharp bends or kinks in the capillary Leave excess capillary loosely coiled below controller case Remove the setting knob by pulling straight off Remove the two screws that hold the setting indicator in place and remove the setting indicator See Fig 5 CONTROLLER PANEL MAX 5 64 IN THICK ADJUSTABLE DIFFERENTIAL MODELS ONLY Set differential See Adjustment and Checkout section Using setting indicator as a template mark and drill holes in the panel for the mounting screws and for the knob shaft Mount the controller behind and the setting indicator in front of the panel using the two screws removed earlier See Fig 5 MODELS WITH TEMPERATURE LIMIT STOP ONLY Adjust to desired setting as described under To Set Temperature Limit Stop page 8 Replace knob on shaft SETTING INDICATOR 8 MOUNTING SCREWS 2 KNOB M25418 Fig 5 The Mounting Screws hold the Setting Indicator and Controller in place Mounting Behind Panel Controller with Screwdriver Slot 1 2 Mark and drill three holes in the panel using the tem
11. ket Mounts on the Front of the Panel WIRING All wiring must comply with applicable codes and ordinances Disconnect power before beginning wiring Connect as shown in equipment manufacturer s instructions if provided Otherwise use the typical hookups shown See Fig 8 refer to Figures 9 and 10 24V THERMOSTAT LOW WATER CUTOFF L4188 9 PRESSURE CONTROLLER L4188 9 HIGH LIMIT HOT A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A USE L6188 9C C 1 CONTACTS IF MANUAL RESET IS REQUIRED M25421 Fig 8 Low and High Limit Application on a Gas Fired System with Domestic Hot Water L4188A B L4189A B L6188A C L6189A C AQUASTAT CONTROLLERS 24V THERMOSTAT PROTECTORELAY CONTROL HIGH LIMIT A A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A L4188 OR L4189 USED AS HIGH LIMIT A L6188 OR L6189 USED AS LOW LIMIT CIRCULATOR CONTROLLER M25422 Fig 9 High Limit and Low Limit Circulator Application in an Oil Fired Hydronic System with domestic hot water 24V THERMOSTAT Af L4188 9 HIGH LIMIT L4188 9 CIRCULATOR L4188 9 LOW LIMIT CIRCULATOR BURNER LINE VOLTAGE PROTECTORELAY LOW VOLTAGE A PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS D REQUIRE M25423 Fig 10 High Limit and Separate Low Limit and Circulator Application in an Oil Fired Hydronic System with Dom
12. sertion Optional Specifications Specify when ordering e Combination screw and 1 4 in male quick connect terminals High or low limit stop models with knob only e Mounting bracket remote bulb models only INSTALLATION p Installing This Product Read these instructions carefully Failure to follow them could damage the product or cause a hazardous condition 2 Check the ratings given in the instructions and on the product to make sure the product is suitable for your application 3 Installer must be a trained experienced service technician 4 After installation is complete check out product operation as provided in these instructions CAUTION Disconnect power supply before wiring to avoid electrical shock or equipment damage Terminal connections must be inside an enclosure that meets local electrical codes Location The equipment manufacturer generally provides a tapping for insertion of the temperature controller sensing element The tapping should be located at a point where average system temperature will be measured Never locate the sensing element close to a hot or cold water inlet or a steam coil or where the well s pressure rating will be exceeded Turn off power and if the system is filled drain to a point below the boiler tapping or wherever the sensing element is to be located If no tapping is provided prepare one properly threaded at the desired location If this is a remote
13. tting e Read the setting from the front of the knob e Place the knob on the shaft e Turn the knob to make sure it 1 turns through the desired adjustment range and 2 stops at the limit setting DO NOT FORCE e Return knob to desired setting AJUST LIMIT STOP LIFT AND PUSH TO CHANGE LIMIT SETTING LIMIT STOP POINTER KNOB REPLACE KNOB ON SHAFT SETTING INDICATOR LIMIT STOP MUST BE ON RIGHT SIDE OF SETTING INDICATOR FOR HIGH LIMIT ON LEFT SIDE FOR LOW LIMIT FOR LOW LIMIT STOP TURN SHAFT FULL COUNTERCLOCKWISE SHOWN BEFORE REPLACING KNOB FOR HIGH LIMIT STOP KNOB TURN SHAFT FULL CLOCKWISE BEFORE REPLACING KNOB M25426 Fig 13 Adjust the Limit Stop with a Screwdriver and check Orientation when Replacing Knob on Shaft CHECKOUT Turn the system on and observe it through several cycles to make sure the controller operates as desired Teflon is a registered trademark for E I Du Pont De Nemours and Company Automation and Control Solutions Honeywell International Inc 1985 Douglas Drive North Golden Valley MN 55422 customer honeywell com 35 Dynamic Drive U S Registered Trademark 68 0061 1 J I Rev 10 07 Toronto Ontario M1V 4Z9 Honeywell Limited Honeywell Limit e Honeywell Printed in U S A on recycled 2007 Honeywell International Inc paper containing at least 10 post consumer paper fibers
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