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Intellifaucet K Series Owner's Manual
Includes Remote Control Supplement
Version 2.0 July 1, 1992
Revised January 2, 2000


(Intellifaucet RK Models Only)
Mechanical and Electrical Connections
Remote Temperature Setpoint Scaling Equations


Thank you for selecting the finest water temperature control valve available.

This manual provides you with instructions on how to install, operate, calibrate, maintain and repair the Intellifaucet. Drawings are provided to clarify the text.

If you have any questions or suggestions not covered in this manual, please contact Hass Manufacturing Company (HMC).



The Intellifaucet is mounted to a wall bracket. Adequate supplies of hot and cold water must be provided. Impure water must be filtered. Do not connect the output of the Intellifaucet to a closed system without using an anti-siphon vacuum breaker.

The Intellifaucet uses 115 or 230 Volts AC, 50-60 hz electric supply. A switch is provided on the power supply for selecting the proper line voltage. This switch is set at the factory for 115 Volts. The unit draws a maximum of 0.2 A at 115 volts, (0.1 A at 230 volts), for a maximum power consumption of 23 Watts.

Mechanical Connections

The recommended layout of the supplies for the Intellifaucet is shown in Figure 1.

There must be a minimum of 1/2 inch between the back of the Intellifaucet and the wall. Adequate air flow is required to allow heat to escape from the inside of the Intellifaucet's enclosure.

Figure 1, 4K

FIGURE 1 - Recommended layout of supplies for installation of the Intellifaucet

The Intellifaucet is shipped mounted to the wall bracket. Fasteners are supplied to attach the wall bracket to wood or masonry walls.

Step 1. Prepare mounting surface, attach wall bracket and attach Intellifaucet to the bracket.

Step 2. Connect pipe fittings to the Intellifaucet valves. HOT IS ON THE LEFT; COLD IS ON THE RIGHT.

Step 3. Connect the pipe fitting to the outlet.

Step 4. Close valves and slowly pressurize the system checking all connections for leaks.

Step 5. Flush air from the system by slowly opening the valves.

Step 6. After the air is flushed from the system, gently close the Intellifaucet's valves by hand.

Electrical Connections

Plug the 12 V cord into the hole in the bottom rear of the Intellifaucet's enclosure.


Manual control

You can use the Intellifaucet as a precision manual faucet when the power is off. Both knobs rotate counter-clockwise to open (looking from above) and clockwise to close. Only modest tightening is needed for a tight connection. DO NOT OVER-TIGHTEN. Over-tightening can cause the motors driving the valves to stall.

Turning the Intellifaucet On

The power switch is mounted on the rear panel of the 1043 power supply. The 10731 Power Adaptor is always on. Set the switch to the ON position, if available. The valves will close and then a short beep should be heard from the Intellifaucet. This indicates that the Intellifaucet is operating properly.

Operating the Intellifaucet

MAKE CERTAIN THE VALVES ARE CLOSED. The Intellifaucet turns the water on by itself. Pressing START causes the valves to open, allowing temperature-controlled water to flow. STOP causes the valves to close. All key functions are described in the notes to Figure 4. Additional information about the function and operation of the keys is presented in the reference section.

The control panel is comprised of displays, i.e., four LED status lamps and a numerical display; and a keypad. The displays and keys are numbered and the function of each is described in Figure 2.


Try these examples to get used to the system.

Example 1. You need some fresh water at 105 degrees F. Turn the power switch on the power supply on. Press and hold TEMP UP. When the display reads 105, release the key. Now press START. When you want to turn the water off, press STOP.

Example 2. To wash some film, a photographer needs 68.0 degree water running for 5 minutes. Turn the power switch on the power supply on. Press and hold TEMP DOWN. Press START TIMER. The Intellifaucet will shut off the water in 5 minutes. If you want to stop earlier, press STOP.

Figure 2, 7K

Figure 2 The Control Panel of The Intellifaucet

1. NUMERICAL LED DISPLAY Displays the temperature in the default
mode. Temperature, flow and timer settings are displayed when the key corresponding to that parameter is pressed.

2. POWER Indicates whether the power is on.

3. CELSIUS Indicates the temperature scale. When the light is off, the scale is Fahrenheit and when on, the scale is Celsius.

4. TIMER ACTIVE Indicates that the timer is active.

5. AUTO SHUTOFF ACTIVE Indicates that the automatic shutoff mode is activated.

6. START Starts the flow of temperature- controlled water.

7. STOP Stops the flow of water and deactivates the timer, if active.

8. START TIMER Starts the flow of temperature-controlled water and activates the timer .

9. SHOW TEMP SETPOINT Momentarily shows the setpoint temperature.

10. SHOW FLOW SETTING Momentarily shows the flow setting.

11. SHOW TIMER SETTING Momentarily shows the timer setting.

12. SHOW TIME LEFT Displays the time left when the timer is active. Press again to show current temperature.

13. TEMP UP Increases the temperature setpoint from the current value.

TEMP DOWN Decreases the temperature setpoint from the current value.

14. FLOW UP Increases the flow setting from the current value.

FLOW DOWN Decreases the flow setting from the current value.

15. TIMER UP Increases the timer setting.

TIMER DOWN Decreases the timer setting.

16. LIGHTS ON/LIGHTS OFF Turns off all the lights on the front panel. Press again to restore the lights. Deactivates all keys except START, STOP and LIGHTS ON/LIGHTS OFF.

17. AUTO SHUT OFF Activates the auto shut off mode. Pressing this key again deactivates the auto shut off mode.

18. °F/°C Changes the temperature display to degrees Celsius. Press again to show degrees Fahrenheit.



You do not need to know how the Intellifaucet works to use it. Here is a short explanation for the curious (Figure R.1).

The Intellifaucet mixes hot and cold water like an ordinary faucet. The Intellifaucet measures the output water temperature and adjusts the faucet valves. This process is repeated over and over. After a short time period, the water temperature is the same as the temperature you selected.

Figure R1, 2K

Figure R.1 Block Diagram of the Intellifaucet System



The Intellifaucet performs one primary function, temperature control, and two secondary functions, flow volume control and flow duration control.

Temperature Control

The Intellifaucet delivers constant temperature flowing water by mixing hot and cold supplies. The unit operates in two modes, standby and control. All keyboard parameters may be adjusted in both the standby and the control modes.

Standby mode

In the standby mode, the Intellifaucet is used as a faucet with a built-in digital thermometer. You can rotate the knobs on the top of the Intellifaucet to open and close the valves like a typical faucet.

Control mode

In the control mode, the Intellifaucet is used as an automatic water temperature controller. The control mode is activated when either the START or START TIMER keys is pressed. The valves automatically open allowing water to flow, the Intellifaucet reads the temperature and adjusts the valves. You can press STOP at any time to return to the standby mode.

Flow volume selection

Flow volume from 20 to 100 per cent of full flow can be selected using the FLOW keys. Actual flow rates (gallons per minute, kilograms per second) will vary according to the supply pressure.

Timer - Flow duration

The timer can be set to shut off the flow of water after a user specified time period ranging from one minute to four hours. Five keys are dedicated to the timer functions. The TIMER UP and TIMER DOWN keys adjust the length of time the Intellifaucet is to stay on. Pressing the SHOW TIMER SETTING key causes the display to show the timer setting. The START TIMER key activates the timer starting the countdown. The valves will open and water will flow if this key is pressed when the valves are closed. Water flow will continue until the timer expires. The STOP key overrides the timer. If the water is running when the START TIMER key is pressed, then the timer simply starts the countdown and will shut down the flow when the timer expires. The SHOW TIME LEFT key causes the display to show the amount of time left in the countdown. This key works only when the timer is active. Pressing START TIMER while the timer is running simply resets the count to the timer setting value and counts down from there. This allows you to run water for longer than the maximum time interval of four hours without shutting off the water. The following example illustrates this technique.

Example: You want to run water without interrupting the flow at 68.0° F for 7 hours and 50 minutes.

Press TIMER UP until it reaches 4-00. This means 4 hours and 0 minutes. Press START TIMER. When 3 hours and 50 minutes has expired press START TIMER again. This resets the count to 4 hours. Therefore, the water runs for a total of 3:50 + 4:00 or 7 hours, 50 minutes.

Temperature scale selection

The °F/°C mode key causes the display to toggle between the Fahrenheit and Celsius temperature scales.


There are two parts to the display; the numerical LED display and the 4 red LED status lamps.

The Numerical LED Display

The default-mode of the seven-segment display indicates the current temperature of the water contacting the temperature probe inside the faucet, whether the water is running or not.

The display changes whenever the keyboard is pressed. When a key is pressed, the display changes to show the value of the parameter associated with that key. The display will return to displaying the temperature 3 seconds after any key is released except when the SHOW TIME LEFT key has been pressed. The time remaining on the timer will be displayed until this key is pressed a second time. The temperature will then be displayed. The following table shows the parameter displayed when a key is pressed.

Parameter Displayed Key Pressed

Actual temperature none, °F/°C

Temperature setpoint TEMP UP, TEMP DOWN, Show Temp, Setpoint, START

Flow setting FLOW UP, FLOW DOWN, Show Flow, Setting

Timer setting TIMER UP, TIMER DOWN, START TIMER, Show Timer Setting

Time left Show Time Left (display remains until the key is pressed again)

The Status Lamps

The status lamps indicate what mode the Intellifaucet is in during a particular operation. The POWER light indicates the power is on. The CELSIUS light indicates the temperature is being displayed in degree Celsius units not Fahrenheit. The TIMER ACTIVE light indicates the timer is operative. The AUTO SHUT OFF light indicates the auto shut off function has been activated.


The Intellifaucet keypad features 16 touch-keys. Each key is designated to carry out a unique function.

The control mode of the Intellifaucet is activated by pressing the START key. It is not necessary to open the valves manually; they will open automatically and water will begin to flow. Pressing the STOP key will cause the valves to close and the flow of water will be stopped. The timer function can be activated by pressing the START TIMER key. The default time setting is 5 minutes and the Intellifaucet will begin counting down from this setting unless the timer setting has been changed by using the TIMER UP and TIMER DOWN keys. After the selected time interval has expired the valves will close automatically and the flow of water will stop.

The function of the four "SHOW" keys is to display the setpoint or setting of the temperature, flow and timer. The display will return to the current temperature value three seconds after releasing any of these keys, except for the SHOW TIME LEFT key. To return the display to the temperature, this key must be pressed a second time.

Six keys operate like knobs. These keys are TEMP UP, TEMP DOWN, FLOW UP, FLOW DOWN, TIMER UP, and TIMER DOWN. Pushing and holding one of these keys is analogous to rotating a volume control knob on a radio. These six keys allow the user to increase or decrease the temperature setpoint and the flow and timer settings. The temperature changes in 0.1 degree F steps, the flow in 1 per cent steps and the timer in 1 minute steps. All six of these keys has an arrow symbol and a word on its label.

These knob-like keys can be operated in three modes; the single step mode, the slow repeat mode and the fast repeat mode.

Single step mode. Pushing and releasing a key will change the parameter by one step.

Slow repeat mode. Holding a key for more than 1/2 second causes the parameter to increase by 10 units per second.

Fast repeat mode. Holding the TEMP or TIMER keys for more than 2 1/2 seconds changes the parameter by 60 units per second. The FLOW keys do not have a fast repeat mode.

The "LIGHTS ON/LIGHTS OFF" key turns the display LED's on or off. When the lamps are turned off, no light is emitted from the Intellifaucet, permitting the Intellifaucet to be used in light sensitive environments, such as photographic darkrooms.

The AUTO SHUTOFF key enables the user to instruct the Intellifaucet to respond to problem conditions in one of two ways - ring an alarm or shut off the flow of water. The auto shutoff is inactive when the Intellifaucet is first turned on. The auto shutoff is activated and deactivated by pressing the Auto Shutoff key.

When the auto shutoff is inactive, the Intellifaucet warns you if it can not keep the temperature at the setpoint temperature by causing the Intellifaucet's built-in speaker to beep. While beeping, the Intellifaucet remains in the control mode. The beeping stops when either the user presses STOP or when the hot water supply temperature recovers (for example) so that it exceeds the setpoint temperature. When the Auto Shutoff feature is active, the Intellifaucet closes the valves, returning to the standby mode, if it can not keep the temperature at the user-selected setpoint temperature. The unit will then remain in the standby mode until you press the START or START TIMER key.

The °F/°C key causes the display to change between the Fahrenheit and Celsius temperature scales. The Fahrenheit scale is displayed when the Intellifaucet is initially turned on.


Under normal use the Intellifaucet does not require maintenance.

Seat seal replacement

The seat seals are made from 25% glass-filled Teflon (TM DuPont). The seals should last for many years. Tests indicate that the seals will last for at least five years without failing. Replacing the seals is a difficult job. HMC will repair the unit if so desired. Contact us to arrange for servicing and servicing charges. Step by step instructions are included for disassembling the unit and replacing the seat seals (see pages 16-18 for instruction).

To replace the seat seals, you must disassemble the Intellifaucet. No special tools are required, however, you will need a Phillips screwdriver and assorted open end or adjustable wrenches. Additional technical support is available from HMC.

The seat seals and plunger are replaced as a unit called the plunger assembly . When replacing the plunger assemblies, replace the stem seal O-rings . New plunger assemblies and O-rings are available from HMC.

Disassembling the Intellifaucet

To disassemble the Intellifaucet, you must remove the cover, circuit boards, and the motor assembly. Then you can open up the faucet and remove and replace the parts as needed. Reference numbers in parentheses correspond to the numbers in Figure R.2. (NS) indicates that a part in not shown in Figure R.2 but is readily apparent.

Figure R2, 4K

Figure R.2 Exploded Diagram of the Intellifaucet


PARTS LIST (Quantity)

1 Knob (2) 3 Step Motor (2) 4 Screw (12) 7 Motor Mounting Platform (1) 9 Coupling (2) 11 Nut (2) 12 Compression Fitting (1) 13 Bonnet (2) 14 O-Ring, Bonnet (2) 15 O-Ring, Stem (2) 16 Thrust Washer (2) 17 Stem (2) 19 Faucet Assembly (1) 20 Plunger (2) 23 Seat Seal (2) 24 Screw (2) 25 Faucet Mounting Plate (1) 26 Shaft Extension (2) 28 Screw (2) 63 Thermocouple Probe (1)

Removing the cover

Step 1. Turn off the power supply and disconnect the Intellifaucet from the power supply.

Step 2. Turn off the water supplied to the Intellifaucet.

Step 3. Open the valves one rotation by rotating the knobs (#1) counterclockwise as seen from above.

Step 4. While holding the knobs (#1), remove the knob retaining screws (#28).

Step 5. Lift the knobs (#1) straight up and set aside.

Step 6. Remove the 6 cover screws (NS).

Step 7. Gently lift the cover (NS) straight up. Avoid damaging the front panel gasket (NS).

Removing the circuit boards

Step 8. Remove the two screws (NS) holding the front panel (NS) to the base. These screws are located on the underside of the base.

Step 9. Gently unplug the 12 wire connector (NS) from the front circuit board (NS).

Step 10. Gently disconnect the thermocouple plug (NS) (bright yellow).

Step 11. Pull the front panel forward and away from the unit and set aside.

Step 12. Remove the two screws holding the rear panel (NS) to the base (#25).

Removing the motor assembly

Step 13. Remove the 2 faucet-base retaining nuts (#11).

Step 14. Gently lift the base (#25) off the faucet (#19) and set aside.

Opening the faucet

Step 15. Loosen the bonnet (#13).

Step 16. Remove the bonnet (#13). While unscrewing the bonnet, hold the stem (#17) stationary to prevent it from jamming up against the underside of the bonnet. The stem assembly is removed with the bonnet.

Step 17. Unscrew the plunger assembly (#20) from the stem (#17). This is a left hand thread.

Replacing the O-rings

Step 18. Loosen the coupling (#9) set screws and remove the coupling from the stem (#17).

Step 19. Remove the stem (#17) from the bonnet (#13) exposing the O-ring (#15) inside.

Step 20. Replace the O-ring (#15) with a fresh one. Lubricate the O-ring with Parker Super O Lube or equivalent (silicon-based grease) when assembling.

Reassemble in reverse order of disassembly.



The Intellifaucet is calibrated at the factory. However, re-calibration may be needed since the characteristics of electronic components can change with time. Check the Intellifaucet's accuracy at least once per year to determine if re-calibration is needed.

The tools necessary for calibration include a reference thermometer accurate to 0.1 degrees Fahrenheit, a 16 ounce (1 liter) container and a small screwdriver.

Two adjustments are made to calibrate the unit. Located on the right-hand side of the front circuit board are an 8-switch DIP switch and a 15-turn variable resistor (pot). Use the small screwdriver to change the switch settings and/or rotate the pot screw.

Step 1. Remove the cover and set the dip switches to 00000000. 0 is to the right, 1 is to the left.

Step 2. Direct the output water into the container with the reference thermometer.

Step 3. Select two temperatures reasonably far apart, such as 68.0 F and 102.0 F.

Step 4. Set the Intellifaucet for the lower temperature.

Step 5. Set the flow to 50 to 100%.

Step 6. Press START.

Step 7. Wait until the temperature stabilizes, about 2-5 minutes.

Step 8. Record the setpoint temperature and the reference temperature of the water in the container.

Step 9. Set the Intellifaucet for the second temperature and press START.

Step 10. Wait until stable, about 2-5 minutes.

Step 11. Record the setpoint and actual temperatures.

Step 12. Set up a table as follows: (example values)

 T setpoint T actual Difference (T act - T set)
70.0 69.2 -0.8
105.0 104.1 -0.9

Calibration Data Table Example


There are four possible cases.

Case 1: Both differences equal 0. The unit is calibrated.

Case 2: Both differences are equal, but not equal to 0.

Step 1. Look up the offset in the Calibration Offset Table


Step 2. Set the DIP switches to match the COT setting.

Step 3. Repeat beginning at Step 1 of the calibration procedures.

Case 3: The difference at the higher temperature is more positive than the difference at the lower temperature.

Step 1. Rotate the pot screw clockwise up to three rotations.

Step 2. Start over at Step 1 until results lead to Case 2.

Case 4: The difference at the lower temperature is more positive than the difference at the higher temperature.

Step 1. Rotate the pot screw counter clockwise up to three rotations.

Step 2. Start over at Step 1 until results lead to Case 2.

Repeat calibration as needed.

Calibration Offset Table
Offset Needed in °F
Switch Position in 87654321 order

°F    87654321 °F   87654321 °F  87654321 °F   87654321

-12.8 10000000 -6.4 11000000 0.0 00000000 6.4  01000000
-12.7 10000001 -6.3 11000001 0.1 00000001 6.5  01000001
-12.6 10000010 -6.2 11000010 0.2 00000010 6.6  01000010
-12.5 10000011 -6.1 11000011 0.3 00000011 6.7  01000011
-12.4 10000100 -6.0 11000100 0.4 00000100 6.8  01000100
-12.3 10000101 -5.9 11000101 0.5 00000101 6.9  01000101
-12.2 10000110 -5.8 11000110 0.6 00000110 7.0  01000110
-12.1 10000111 -5.7 11000111 0.7 00000111 7.1  01000111
-12.0 10001000 -5.6 11001000 0.8 00001000 7.2  01001000
-11.9 10001001 -5.5 11001001 0.9 00001001 7.3  01001001
-11.8 10001010 -5.4 11001010 1.0 00001010 7.4  01001010
-11.7 10001011 -5.3 11001011 1.1 00001011 7.5  01001011
-11.6 10001100 -5.2 11001100 1.2 00001100 7.6  01001100
-11.5 10001101 -5.1 11001101 1.3 00001101 7.7  01001101
-11.4 10001110 -5.0 11001110 1.4 00001110 7.8  01001110
-11.3 10001111 -4.9 11001111 1.5 00001111 7.9  01001111
-11.2 10010000 -4.8 11010000 1.6 00010000 8.0  01010000
-11.1 10010001 -4.7 11010001 1.7 00010001 8.1  01010001
-11.0 10010010 -4.6 11010010 1.8 00010010 8.2  01010010
-10.9 10010011 -4.5 11010011 1.9 00010011 8.3  01010011
-10.8 10010100 -4.4 11010100 2.0 00010100 8.4  01010100
-10.7 10010101 -4.3 11010101 2.1 00010101 8.5  01010101
-10.6 10010110 -4.2 11010110 2.2 00010110 8.6  01010110
-10.5 10010111 -4.1 11010111 2.3 00010111 8.7  01010111
-10.4 10011000 -4.0 11011000 2.4 00011000 8.8  01011000
-10.3 10011001 -3.9 11011001 2.5 00011001 8.9  01011001
-10.2 10011010 -3.8 11011010 2.6 00011010 9.0  01011010
-10.1 10011011 -3.7 11011011 2.7 00011011 9.1  01011011
-10.0 10011100 -3.6 11011100 2.8 00011100 9.2  01011100
-9.9  10011101 -3.5 11011101 2.9 00011101 9.3  01011101
-9.8  10011110 -3.4 11011110 3.0 00011110 9.4  01011110
-9.7  10011111 -3.3 11011111 3.1 00011111 9.5  01011111
-9.6  10100000 -3.2 11100000 3.2 00100000 9.6  01100000
-9.5  10100001 -3.1 11100001 3.3 00100001 9.7  01100001
-9.4  10100010 -3.0 11100010 3.4 00100010 9.8  01100010
-9.3  10100011 -2.9 11100011 3.5 00100011 9.9  01100011
-9.2  10100100 -2.8 11100100 3.6 00100100 10.0 01100100
-9.1  10100101 -2.7 11100101 3.7 00100101 10.1 01100101
-9.0  10100110 -2.6 11100110 3.8 00100110 10.2 01100110
-8.9  10100111 -2.5 11100111 3.9 00100111 10.3 01100111
-8.8  10101000 -2.4 11101000 4.0 00101000 10.4 01101000
-8.7  10101001 -2.3 11101001 4.1 00101001 10.5 01101001
-8.6  10101010 -2.2 11101010 4.2 00101010 10.6 01101010
-8.5  10101011 -2.1 11101011 4.3 00101011 10.7 01101011
-8.4  10101100 -2.0 11101100 4.4 00101100 10.8 01101100
-8.3  10101101 -1.9 11101101 4.5 00101101 10.9 01101101
-8.2  10101110 -1.8 11101110 4.6 00101110 11.0 01101110
-8.1  10101111 -1.7 11101111 4.7 00101111 11.1 01101111
-8.0  10110000 -1.6 11110000 4.8 00110000 11.2 01110000
-7.9  10110001 -1.5 11110001 4.9 00110001 11.3 01110001
-7.8  10110010 -1.4 11110010 5.0 00110010 11.4 01110010
-7.7  10110011 -1.3 11110011 5.1 00110011 11.5 01110011
-7.6  10110100 -1.2 11110100 5.2 00110100 11.6 01110100
-7.5  10110101 -1.1 11110101 5.3 00110101 11.7 01110101
-7.4  10110110 -1.0 11110110 5.4 00110110 11.8 01110110
-7.3  10110111 -0.9 11110111 5.5 00110111 11.9 01110111
-7.2  10111000 -0.8 11111000 5.6 00111000 12.0 01111000
-7.1  10111001 -0.7 11111001 5.7 00111001 12.1 01111001
-7.0  10111010 -0.6 11111010 5.8 00111010 12.2 01111010
-6.9  10111011 -0.5 11111011 5.9 00111011 12.3 01111011
-6.8  10111100 -0.4 11111100 6.0 00111100 12.4 01111100
-6.7  10111101 -0.3 11111101 6.1 00111101 12.5 01111101
-6.6  10111110 -0.2 11111110 6.2 00111110 12.6 01111110
-6.5  10111111 -0.1 11111111 6.3 00111111 12.7 01111111

Notes: (1) 0 = OFF and 1 = ON. (2) This table converts a decimal number divided by ten to its two's complement binary number form. (3) Offset = Temperature of reference thermometer - Temperature setpoint on the Intellifaucet.

Fuse replacement

NOTE: This only applies to the 1043 Power Supply (stainless steel case). The 10731 AC Power Adaptor (black plastic case) does not have replaceable fuses. The entire power adaptor must be replaced.

There are two fuses in the power supply. To replace a fuse follow these steps.


Step 2. Remove power supply cover.

Step 3. Pry out the fuses and replace with the same rating new fuse.

The fuse near the on/off switch is a 1 amp normal blow 3AG fuse. The other fuse is a 3 amp slow blow 3AG fuse. Replacing with incorrect values could cause safety problems or premature failure and will void the warranty. If the fuses blow repeatedly, some other problem may exist and the device should be serviced. See the troubleshooting section.


The following chart indicates symptoms, causes and what to do about them. If a problem exists which is not listed in the chart, contact HMC. We will help you to solve the problem as quickly as possible.

Sympton Cause What to do
Valves do not open and make stuttering noise after pressing START Valves wer over-tightened by hand Loosen by hand, then close gently
Nothing happens Power cords not connected Check cables
  Fuses blown Replace fuses / adaptor
  Device is off Turn on
Random numbers appear Power supply turned off and on too quickly Turn power off, wait 5 seconds, turn power back on
  Electronic component failed Have unit serviced
Valves cycle wildly  Supply to valves incorrect Check plumbing
   Flow is restricted Check plumbing


Clean the Intellifaucet with a mild soap on a damp cloth. Do not use cleanser or other abrasive cleaners as they may scratch the surfaces.


Note: This information supersedes information presented in the preceding sections of this manual. In this section you will find new instructions on how to connect the remote control interface and how to calibrate the unit.

The Intellifaucet "RK" remote models feature a remote control interface for starting the flow of water, terminating the flow of water, and adjusting the setpoint temperature from a remote control panel, switchboard, programmable logic controller, or process control computer.

Mechanical and Electrical Connections

On the left side of the Intellifaucet cover is an Amphenol model MS-3102A-16S-8S 5-pin circular connector. The mating cable connector can be any one of Amphenol models MS-3106 A or B-, MS-3107 A or B-, MS-3108 A or B-16S-8s 5-pin circular mating plugs.


The pin connections appear in Figure 1.

A = + 4-20 mA remote temperature signal in.
B = - 4-20 mA remote temperature signal out.
C = Remote start +5 V out.
D = Remote stop +5 V out.
E = Remote start and remote stop +5 V return.



The 4-20 mA temperature setpoint connection presents a 250 Ohm load to the current source. The circuit has no provision for calibration. The remote start and stop signals require a momentary switch closure of at least 50 milliseconds. Schematic diagrams of the connections appear in Figures 2 and 3.







The recommended switch configuration for the remote start and the remote stop functions appears in Figure 4.



Remote Temperature Setpoint Scaling Equations

The 4-20 mA remote temperature setpoint signal is scaled to Fahrenheit degrees according to the following equations:


To convert mA to degrees F:

Degrees F = 9.2 * mA - 1.3 ± 1.4 °F (Eqn. 1)


To convert degrees F to mA:


mA = 0.11 * degrees F + 0.14 ± .2 mA (Eqn. 2)



Calibration is accomplished by adjusting two potentiometers (pots) located on the printed circuit board mounted to the front panel. One pot (labeled G) sets the gain, while the other pot (labeled Z) sets the zero offset. The two controls are not coupled, that is, adjusting one does not affect the other.


Calibration Procedures

Calibration should be done in a draft-free area. Drafts will affect the accuracy of the calibration. The remote control upgrade kit is shipped with the two pots in the "zero" position halfway between the two extreme limits of the screw travel.


  1. Remove the Intellifaucet cover. While lifting the cover up, disconnect the remote control cable from the header on the printed circuit board and carefully snake it through while pulling the cover up and to the left.
  2. Set a 16 ounce container so that the outlet of the Intellifaucet fills the container and spills over into a drain.
  3. Place a reference thermometer in the 16 ounce container.
  4. Set the Intellifaucet for 68 degrees F. Press START.
  5. Wait 2-5 minutes. Read and record the reference temperature.
  6. Set the Intellifaucet for 102 degrees F. Press START.
  7. Wait 2-5 minutes. Read and record the reference temperature.


Set up a table as follows: (example values)

 T setpoint T actual Difference (T actual - T setpoint)
 70.0 69.2 -0.8
105.0 104.1 -0.9


There are four possible cases.


Case 1: Both differences equal 0. The unit is calibrated.

Case 2: Both differences are equal, but not equal to 0.

Rotate the Z pot approximately 0.8 degrees F per rotation. Rotate clockwise to raise the actual temperature, counterclockwise to lower it. Start over at Step 4 until results lead to Case 1.

Case 3: The difference at the higher temperature is more positive than the difference at the lower temperature.

Rotate the G pot screw clockwise up to three rotations. Start over at Step 4 until results lead to Case 2.

Case 4: The difference at the lower temperature is more positive than the difference at the higher temperature.

Rotate the G pot screw counter clockwise up to three rotations. Start over at Step 4 until results lead to Case 2.

Repeat calibration as needed.



The local/remote toggle switch on the left side of the cover is in the local temperature setpoint mode when down, and the remote mode when up. The device connected to the start/stop line should be held closed for a minimum of 50 milliseconds to start or stop the flow of water. Follow the scaling equations to set the current to obtain the correct temperature water.


The Intellifaucet generates and uses radio frequency energy. If not installed in accordance with the operating instructions, technical and service information, it may interfere with radio and television reception.

The Intellifaucet has been tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules. These rules are designed to provide reasonable protection against such interference when operated in a residential area. If the unit interferes with radio or television reception, which can be determined by switching the unit off and on, the user is encouraged to try one of these actions:

  • Move the receiving antenna
  • Relocate the receiver with respect to the Intellifaucet
  • Plug the Intellifaucet into a different electrical outlet from the radio or television so the Intellifaucet and the receiver are on different branch circuits.

If necessary, contact Hass Manufacturing Company for additional suggestions. The manufacturer is not responsible for any radio or television interference caused by unauthorized modifications to this equipment.

The user may find the following booklet prepared by the Federal Communications Commission helpful: "How to Identify and Resolve Radio-TV Interference Problems". This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No. 004-000-00345-4.



The Intellifaucet uses 12 volts DC in the main unit. Follow these safety precautions when using the Intellifaucet:

  • Use grounded outlet
  • Do not bypass any fuses
  • Do not open the case when power is applied
  • Do not submerge the Intellifaucet or the power supply in water.


Observe all safety precautions when using any electrical appliance.


Hass Manufacturing Company (HMC) warrants the Intellifaucet main unit, power supply and cabling against defects in materials and workmanship for a period of Five (5) years from the date of original retail purchase.
If you discover a defect, HMC will, at its option, repair, replace, or refund the purchase price of the product at no charge to you, provided you return it during the warranty period, transportation prepaid, to HMC. Prior to returning the product for warranty consideration, call Hass Manufacturing Company at (518) 674-8151 for a return authorization number and shipping instructions.

This warranty does not apply if the product has been damaged by accident, misuse, abuse or misapplication, has been modified, or if any serial number has been removed or defaced.


If, at any time, you are not 100% satisfied with the Intellifaucet, you may return it for replacement or a refund, whichever you prefer. Call Hass Manufacturing Company at (518) 674-8151 prior to returning the product for a return authorization number and shipping instructions.


This manual, computer programming, printed circuit board designs, and product design are copyrighted by Hass Manufacturing Company, with all rights reserved.

The Intellifaucet is patented.

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Hass Manufacturing Company
371 NY Highway 351, Averill Park, New York 12018 U.S.A.
Tel (518) 674-8151  Fax (518) 674-8157