Version 1.0 Jan. 15, 1993
Revised December 21, 2001
Thank you for selecting the finest batch control system available. The Intellifaucet Batch and Temperature Control System is a unique product which not only delivers accurate batches of water, but controls water temperature as well. A remote connection allows for external temperature setpoint, and remote batch start and stop.
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).
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.
Electrical Connections - Remote Control
On the left side of the Intellifaucet cover is a 7-pin circular connector. The mating cable connector is supplied with each unit.
The pin connections are as follows:
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 New Batch and Stop signals require a momentary switch closure of at least 50 milliseconds. 9 V DC, 10 mA power is supplied by the Intellifaucet for a flowmeter transistor switch. Diagrams of the connections appear in Figures 3-5.
Figure 3. 4-20 mA remote temperature signal circuit diagram.
Figure 4. Start and stop button circuit diagram.
Figure 5. Flowmeter connections.
The recommended switch configuration for the remote Start New Batch and the remote Stop functions appears in Figure 6.
Figure 6. Recommended switch layout for start and stop control.
Remote Temperature Setpoint Scaling Equations
The 4-20 mA remote temperature setpoint signal is scaled to Fahrenheit degrees according to equations 1 and 2. There is no adjustment for these values.
To convert mA to degrees F:
Degrees F = 9.2 * mA - 1.3 ± 1.4 °F ( Equation 1 )
To convert degrees F to mA:
mA = 0.11 * degrees F + 0.14 ± .2 mA ( Equation 2 )
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 in Figure 7 and described in the notes to Figure 7.
Try these examples to get started with the Intellifaucet.
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 105.0, release the key. Now press START. When you want to turn the water off, press STOP.
Example 2. You need 25 gallons of 68.0 degree F water. Turn the power switch on the power supply on. Press and hold TEMP DOWN until the display reads 68.0. Press and hold BATCH UP until the display reaches 25.0. Press START NEW BATCH. The Intellifaucet will shut off the water at 25 gallons. If you wish to pause the batch after 10 gallons, press the PAUSE BATCH/RESUME BATCH key. Press again to resume. Press STOP to close the valves and cancel the batch.
Figure 7. The Control Panel of The Intellifaucet
R.1 HOW IT WORKS
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.
When running a batch, the Intellifaucet counts pulses from a flowmeter. When the number of pulses is close to the quantity selected, the Intellifaucet closes its valves gradually to a low flow. When the number of pulses reaches the batch setting, the valves shut off.
Figure R.1 Block Diagram of the Intellifaucet System
R 2. INTELLIFAUCET FUNCTIONS
The Intellifaucet Batch System performs two primary functions, temperature control and batch control, and one secondary function, flow volume 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.
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.
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.
The batch control function causes a user-specified quantity of tempered water to flow. Five keys are dedicated to the batch functions. The BATCH UP and BATCH DOWN keys adjust the batch quantity. Pressing the SHOW BATCH SETTING key causes the display to show the batch setting.
The START NEW BATCH key activates a batch operation. The valves will open and water will flow if this key is pressed when the valves are closed. The display will show the batch total during the batch in the currently selected units. Water flow will continue until the total quantity of water flow is close to the batch setting. Then the Intellifaucet gradually reduces the flow rate until the batch quantity reaches the batch setting. Then the valves close. The STOP key cancels the batch and closes the valves. If the water is running when the START NEW BATCH key is pressed, then the batch simply starts the batch and will shut down the flow when the flow quantity equals the batch setting. The SHOW TEMP key causes the display to briefly show the actual water temperature during a batch.
A batch operation can be paused by pressing the Pause Batch / Resume Batch key. The valves will close but the display will continue to show the batch total. To continue batching, press the key again.
There are two keys which control the units displayed. The English/Metric key selects units from one of these two systems. The English units are Fahrenheit degrees for temperature, U.S. gallons for batch volume quantity, and pounds for batch weight quantity. The Metric units are Celsius degrees, liters and kilograms.
The Volume/Weight key causes the display to toggle between weight units and volume units.
The conversion factors are listed in Section R.3.2.
R.3 THE DISPLAYS
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 shows the current temperature of the water contacting the temperature probe inside the faucet, whether the water is running or not. During a batch, the default mode changes to show the total water flow during the current batch.
The display changes whenever the keypad is pressed. When a key is pressed, the display changes to show the value of the setting associated with that key. The display will return to displaying the default value 3 seconds after any key is released. The following table shows the setting displayed when a key is pressed.
The Status Lamps
There are four LED status lamps. Two lamps show the batch mode, while the other two show which unit is being used.
The BATCH ACTIVE lamp is on when the batch is operative. The BATCH PAUSE lamp is on when an active batch is paused.
The METRIC UNITS lamp is on when temperature units and batch quantity units are being displayed in metric scales. These units are Celsius degrees for temperature, liters for batch volume and kilograms for batch weight. The METRIC UNITS lamp is off when English units are displayed (Fahrenheit degrees, gallons and pounds).
The WEIGHT UNITS lamp is on when the batch quantity is displayed in weight units, pounds for English units and kilograms for metric. When the lamp is off, volume units are displayed (gallons and liters)
The conversion factors used in the Intellifaucet are:
1 U.S. gallon = 3.7854 liters
There is a display table printed on the keypad to the right of the 7 segment display which identifies which units are being displayed with different combinations of the METRIC UNITS and the WEIGHT UNITS lamps.
R.4 THE KEYPAD
The Intellifaucet keypad features 16 touch-keys. Each key is designated to carry out a unique function.
R.4.1 Start, Stop and Start New Batch Keys
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 batch function can be activated by pressing the START NEW BATCH key.
R.4.2 Show Keys
The "SHOW" keys display the temperature setpoint, flow setting or batch setting. The display will return to the current default value three seconds after releasing any of these keys.
R.4.3 Up/Down Keys
The six UP/DOWN keys increase or decrease the temperature setpoint, the flow setting and the batch setting. These keys have an arrow symbol and a word on their label. The temperature setpoint changes in 0.1 degree steps and the flow setting changes in 1 per cent steps. The batch setting changes in 1/10 unit step for gallons, liters and kilograms and 1 unit steps for pounds.
The Up/Down keys can be operated in four modes: the single step mode, the slow repeat mode, the fast repeat mode and the very fast repeat mode.
R.4.4 Pause Batch / Resume Batch Key
The PAUSE BATCH/RESUME BATCH key operates only when a batch is active. When this key is pressed, the valves will close and the BATCH PAUSE lamp will turn on. The Intellifaucet will continue to read the flowmeter input. If the valves are opened manually while a batch is paused, the batch total will continue to accumulate. When the PAUSE BATCH/RESUME BATCH key is pressed again, the valves will open and the batch will remain active until the proper amount of water is delivered.
R.4.5 Units Keys
The English/Metric key causes the display to change between the different measuring systems while the Volume/Weight key changes the display from volume units to weight units and back. Both of these functions are fully explained in Section R.3.2.
Figure R.2 Exploded Diagram of the Intellifaucet
PARTS LIST (Quantity)
1 Knob (2)
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.
Removing the cover
Removing the circuit boards
Removing the motor assembly
Opening the faucet
Replacing the O-rings
Reassemble in reverse order of disassembly.
NOTE: MAKE SURE SEAT SEAL IS NOT SEATED WHEN TIGHTENING BONNET.
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.
There are two potentiometers (pots) which adjust the Gain and Zero of the voltage generated by the temperature sensor. The Gain (G) pot increases the amplification of the temperature signal voltage. Therefore, it changes errors at higher temperatures more than errors at lower temperatures. The Zero (Z) pot adjusts an offset voltage which is added to the voltage from the temperature sensor thereby affecting higher and lower temperatures equally.
Calibration should be done in a draft-free area. Drafts will affect the accuracy of the calibration.
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. Adjust as follows:
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. Adjust as follows:
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. Adjust as follows:
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.
There are two fuses in the 1043 power supply. (The 10741 Power Adaptor does not have replaceable fuses. You must replace the power adaptor.) To replace a fuse follow these steps.
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.
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.
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.
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.
*** IMPORTANT ***