Installing the STS-Series
D’MAND® STS-Series Hot Water Demand System
for Standard Piping (Non-re-circulating)
(STS-50T, STS-70T, and STS-02T) Pre-Fab Systems
Installations shall be in accordance with the manufacturer’s instructions per the requirements of the Uniform Plumbing Code (UPC)
Be Careful
Do not plug the power cord into an electrical receptacle until system is installed and in place. Operation of the system without being plumbed into the water lines may burn out the pump prematurely and void the warranty.
Pre-Installation Checklist
1. Check the package contents. Your D’MAND® System includes:
-A pre-assembled Controller/Circulator Pump Assembly
-STS-50T and STS-70T models will not show zone valve. Zone Valve is inside the pump housing.
-Custom Brass Compression T fittings.
-Homes with galvanized pipes will need galvanized T’s. (Please call 1-800-638-5863.)
-A plastic bag containing: one (1) push-button
-(If wireless remote option was purchased) one transmitter, one receiver, one 12V battery, three gray wire nuts & three screws.
-Check the components for visible damage and contact your supplier immediately if any damage is found.
2. Make sure you have the tools to do the job
No special tools are required to install the ACT D’MAND®System other than standard tools needed in any plumbing job. They include:
-Pipe wrench or crescent wrench
-Pliers
-Small Phillips head and medium flat head screwdriver
-Wire strippers
-Drill and 5/8" drill bit
-Soldering equipment (if applicable)
3. Determine where you will install The System
Typically, this should be at the fixture farthest away from the water heater. If your hot water supply line runs in two separate directions from the water heater, you may need more than one ACT D’MAND®System to satisfy all of your hot water requirements.
Installing The D’MAND® System for all STS-Series Systems
This is for installation of the Pre-Fab AccessoryT’s only. These do not replace the existing instructions included with your system. Be sure you have read the instructions carefully before proceeding with your installation.
You have purchased an ACT Hot Water D'MAND®System that is equipped with the pre-fab accessory package. The ½" male threads and adapters have been provided to install your System.
Enclosed with your system, are two T’s designed to simplify your installation to ½" copper hot and cold supplies. (Additional fittings may be required if your supply lines are galvanized or plastic pipe.)
To Install Your “T” Fittings
-Turn off the house water supply.
-Open the hot and cold faucets at the fixture chosen for installation. This will relieve the water pressure from the hot and cold water pipes.
-Remove the shut-off valves that supply hot and cold water to the sink from the ½" copper pipe. For ease of installation, leave the compression ring and nut from the angle stop on the hot and cold water supplies.
-Remove the compression ring and nut from the enclosed compression fitting on the PF-Tees.
-Install the remaining compression ring and nut to the shut-off valve,slide onto the ½" side of the PF-T and firmly tighten to the ½” compression nut.
-Now you are ready to attach flex lines from the ¾" male thread of the PF-T’s to your D’MAND System. (Teflon tape is recommended for the ¾” threaded fittings.)
-Refer to Page 3 - “Installing the Demand Button(s)” and “Wireless Remote Option”.
Installing The D’MAND®System for all S-Series Systems
The system adapts to your existing plumbing! Follow these simple steps:
"NO SWEAT"
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1. Turn off water supply and remove angle stops. |
2. Install & tighten T’s (included), attach angle stops. |
3. Install copper flex lines or any line with ¾”inside diameter. |
4. Connect System, install push button and plug in. |
Installation must be as shown above
Installing The D’MAND®System
for all S-Series Systems
1. Installation Procedures
A. Turn off the house water supply.
B. Open the hot and cold faucets at the fixture chosen for installation. This will relieve the water pressure from the hot and cold water pipes.
C. Remove the shut-off valves that supply the hot and cold water to the sink.
D. Install Tee-fittings to the pipe stubs from the hot and cold water supply.
-NOTE: Using piping with less than 1/2" inside diameter will restrict the flow of the water, causing it to take longer for hot water to arrive.
E. Install the System between the hot and cold lines, but be sure that the arrows on the pump and are pointing from the hot side to cold as shown in Figure 1.
F. Re-install the shut-off valves to the water supply and sink.
2. After installation adjustments
Check the system carefully to make sure the installation is free of water leaks.
All Electronic Sensitivity Adjustments are pre-set at the factory. If adjustments are necessary please call 800-638-5863 for technical help prior to making any adjustments. The sensor is designed to signal the controller to shut off automatically when hot water has reached your fixture, and not to reactivate if hot water is at the fixture. Review the troubleshooting page for additional information.
3. Try the D’MAND® System and check water temperature
-Once installed, turn water supply on and plug in the system. (Pump will automatically turn itself on when it is initially plugged in without pushing the demand button). The ACT D’MAND®System will continue to operate until the sensor signals that hot water has arrived, then it will automatically shut off. To test the system again, wait until pipes cool down. You may then test the system by pushing the demand button, or to pre-test your system after plugging the unit into 110v outlet, place a hot rag over ThermoSensor™ located to the right of the pump housing.
-The unit will shut off immediately. Remove rag from sensor and test remote control buttons.
-To operate the System from another location in the home, place remote button in desired location. Push remote button, wait a few seconds for system to cycle. You may now turn on hot water. Time for hot water to arrive may vary depending on pipes and distances. The System is designed to electronically shut off at a slight temperature rise preventing warm water from entering into the cold water line. The electronic ThermoSensor™ adjusts automatically to line temperature. Object: To move hot water to your fixtures quickly, shutting off quickly
-NOTE: The Electronic Controller is designed with an automatic safety feature that will shut off the pump in approximately three minutes. This safety device was installed in case the ThermoSensor™ becomes damaged.
4. Installing the Demand Button(s)
A. Drill a 5/8" hole into the desired location.
B. Insert the 4 foot gray wire from the controller through the back side of the hole and connect it to the push button switch. Then, firmly insert the push button back into the hole. Additional push button switches can be spliced into the same wires. It is important to use a button comparable in quality to the button provided.
Wireless Remote Option - RT-954
(Standard with all STS-50T-PF-R, STS-70T-PF-R, or STS-02T-PF-R)
Wiring The Receiver
The remote receiver is the white rectangular box with the three protruding wires: black, red & green. This does not need batteries. Wire the receiver directly to the corresponding wires on the controller by twisting each same colored wire together with gray wire nuts provided.
Receiver should be mounted toward front of cabinet. (Range of transmitter is 70-100’). If transmitter will activate system from short distance, but not from further away, receiver may need to be relocated for better reception. Strapping receiver to front of drain trap facing outward will optimize reception.
Installing Batteries to the Transmitter
Open transmitter with a small flat head screwdriver by inserting screwdriver into slot to release catch. Load battery with negative side of battery toward spring. Carefully replace cover. Numbers are on the frequency dial(s) inside the transmitter and receiver. The signal frequency can be changed by moving the numbered dials from both the receiver and transmitter. This should only be necessary when two D’MAND® Systems are in same home or your neighbor has the system.
Installing The ACT® D’MAND®System for STS-02T
1. Check the package contents. Your System includes:
STS-02T MODEL 0011 PUMP (ONLY)
-A pre-assembled S-02T pump
-Set of ¾” mip flanges + gaskets
-A plastic bag with 1 push-button
STS-02T-PF-R MODEL 0011 PUMP (ONLY)
-A pre-assembled S-02T pump/zone valve assembly
-Set of ¾” mip flanges + gaskets • Set of custom T’s
-Set of ¾” Flex-lines
-A plastic bag with an RT-954 remote control package
2. Installing the System
Flange Setup
Lay pump out with electrical box on top & flange fitting to rear. Open box with flange parts and layout. For each side of the pump’s flange fittings, you will need: 2 nuts, 2 bolts, 1 flange plate, 1 gasket. Set into position and place gasket in this assembly. Next, set gasket side of assembly against flange fitting on pump and secure with nuts and bolts provided. Leave fairly loose until other parts are added. Repeat to other side of pump.
LOOKING DOWN ONTO PUMP
TROUBLESHOOTING Diagnosing Specific Problems
| Problem | Possible Cause | Remedy | ||||||
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| The pump does not run when push button is pressed |
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| The water is not hot enough |
A. Pump or valve was installed with water flow going in the wrong direction B. There is something in the piping that has blocked the flow of water |
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| There is hot water at the cold water tap |
A. The water temperature sensor is positioned incorrectly B. The temperature sensitivity setting now in place is too low, so the pump is not shutting down soon enough |
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| Water is not hot enough when pump shuts down |
A. The temperature sensitivity setting now in place is too low, and the pump is turning itself off too soon |
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| There is hot water in the cold water lines only |
The pump is installed backwards |
Reinstall the pump correctly | ||||||
