FAST-STAT 24 VAC Contact 2 A 2-Contact Wire Extender Instruction Manual
- June 12, 2024
- FAST-STAT
Table of Contents
FAST-STAT 24 VAC Contact 2 A 2-Contact Wire Extender
Product Description
The FAST-STAT Model 1000 provides one additional conductor to a thermostat or condenser cable. For instance, with a 2-wire cable it can provide “R”, “W” + one of “G”, “Y”, “H”, “D”, “W2”or “Y2” and with a 4-wire cable it could provide “R”,”W”,”Y”,”G” + any one of “C”, “D”, “W2”, “Y2” or “O/B”.
Common Uses
Adding manual fan control “G” to a heating system. Installing a powered thermostat that requires a common connection “C”. Upgrading to 2-stage cooling and providing “Y2” to the condenser.
Ratings
- Power Input: 18 – 30 volts AC.
- Contacts: 2 Normally Open
- Contact Rating: 2 Amps, 24 volt AC
- EXAMPLE: FAST-STAT model 1000 used for upgrading to 2-stage air conditioning.
OLD SYSTEM
NEW SYSTEM
Application
- The model 1000 FAST-STAT adds one function to any 24 volt HVAC control system.
Before installing this product
- Read instructions. If you have any questions please contact tech support line at the number listed below.
- This product is designed for use only on 24 volt ac circuits supplied by a class 2 transformer.
- This product is only to be installed by qualified technicians.
- To avoid risk of electrical shock or equipment damage disconnect power before beginning installation.
Operational Considerations
- The sending unit purple wire is connected to receiver purple wire through the thermostat or condenser cable.
- An input on the sending unit green wire will cause an output on the receiver green wire. An input on the sending yellow wire will cause an output at the receiver yellow wire. Each channel is independent of each other.
- Transformer power “R” or “C” cannot be run through the sending unit.
- The receiver must be connected to a 24 volt power source through the receiver’s red and black wires.
- The power supply must be between 18 to 30 volts The total load must not exceed 2 amps.
Table 1. Terminal designation descriptions
Term inal
Designation
| Description| Comment| Color
---|---|---|---
R| Transformer Power| Included & m ust be connected at receiver| Red
C| Transformer Comm on| Included & m ust be connected at receiver| Black
Load 1| Any function| Included|
Yellow
Load 2| Any function| Included| Green
Purple| Interconnect wire| Included| Purple
Model 1000 used to extend wiring from thermostat.
Installation
Guide A
Guide B
Step 1:
- a) Install the sending unit at the furnace / fan coil and the receiver at the condenser
Step 2:
- a) Install a 24 volt transformer in the outdoor unit and connect wires as shown.
- In this example a 2-wire cable has been used with a model 1000 and a 2nd transformer has been installed.
Guide C
- In this example a 3-wire cable has been used with a model 1000 and a 2nd transformer has been installed.
- It is important that the 2nd transformer is connected in parallel to the furnace / fan coil transformer. If the transfomers are connected in series by error then the control voltage would be 48 volts and the controls may be damaged.
Step 1:
- a ) Install the sending unit at the furnace / fan coil and the receiver at the heat pump.
- b) Temporarily connect the “heat wire” to the “R” terminal.
Step 2:
- a ) Install a 24 volt transformer in the outdoor unit.
- b ) Connect one lead to the “R” terminal and the other to “C”Do not connect the “heat wire”at this time.
Step 3:
- a) Switch on the furnace / fan coil control circuit.
- b) Switch on the outdoor unit control circuit.
- c) Measure the voltage between the “heat wire” and the “R” terminal.
- d) If the meter reads about 50 volts then switch the heat pump transformer leads and remeasure the voltage.
- e ) If the voltage between the “heat wire” and the “R” terminal is 0 volts then connect the “heat wire” to the heat pump “W” terminal.
- f ) At the furnace / fan coil reconnect the “heat wire” to the “W” terminal.
Trouble Shooting Instructions
Step 1.
- Is the Receiver getting power? Switch on control circuit and measure voltage at R & C.
- There should be 20 to 28 volts ac at the Receiver’s black & red wires. If OK go to step 2.
Step 2.
- Is any function (G or Y) switching on when it shouldn’t?
- Disconnect the wire from the thermostat cable. Switch on the control circuit. The fan (green) and A/C (yellow) should remain off. If any starts then the Receiver has to be replaced. If OK go to step 3.
Step 3:
- Does the “quick test” work?
- Switch on the control circuit.
- Touch the Receiver purple wire to the
- Transformer “R” terminal on the furnace.
- The fan and compressor should start.
- If they do not start, replace the Receiver.
- If OK go to step 4.
Step 6:
- Is the thermostat compatible with FAST-STAT?
- a ) Reconnect the wires from the Sending Unit to the thermostat. Switch on the control circuit.
- Set the Fan switch to “on” and the system switch to “off”. The Fan should start.
- b ) Set the Fan switch to auto and the system switch to “cool”.
- Adjust the temperature to call for cooling. The Fan and Condenser should start running (there may be a 5 min time delay on a cooling call)
- If the Fan or Cooling does not run when performing the above tests then the thermostat is not compatable with FAST-STAT.
- You will need to use a different thermostat. If you encounter this problem please call our tech support line :
References
Read User Manual Online (PDF format)
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