Install Instructions

ManualsBrandsFast-Stat ManualsHeating SuppliesModel 3000 HVAC Wiring Extender

Page 1 of 4 www.fast-stat.com

Model 3000

Installation Instructions

● The Model 3000 provides two additional control wires

between a thermostat and indoor unit, or indoor unit

and outdoor unit.

● It is compatible with all 24VAC heating and cooling

systems.

● The Model 3000 can provide a common connection

‘C’ using a thermostat cable with 3 or more wires. For

adding a common with only 2 wires see the Model

5000 or Common Maker.

1. Measure the transformer voltage to ensure it is

between 23-28VAC. If it is outside this range the

Model 3000 may not work as intended.

2. Join the Receiver’s purple and red wires together (use

the red wire going to the Sender). All three relays in

the Receiver should energize, internally connecting the

yellow, green, and white wires to ‘R’. If the connected

loads do not start, then measure the voltage from

each output wire to common. If each wire reads

24VAC, then the Receiver is working correctly. If not

then there may be a problem with the Receiver.

3. Disconnect the Sender from the thermostat and

connect the Sender’s red and white wire together. This

should energize the relay connected to the Receiver’s

white wire, and activate its connected load. Repeat

this process for the yellow and green wires, connecting

each wire to red individually. If all loads activate, the

Model 3000 is functioning properly and there may be

a compatibility issue with the thermostat. If a load fails

to activate, there may be a problem with the Sender.

4. If applying power to the Sender’s yellow wire activates

the load connected to the Receiver’s white wire (or

vice versa), then the wires connecting the Sender and

Receiver are crossed. Disconnect the two wires in the

thermostat cable from the Sender’s purple and red

wire, and switch where each wire is connected.

● This product should only be installed by a qualified

technician.

● Requires a Class 2 transformer providing 23-28VAC

● The total connected load must not exceed 2 amps.

● The connected load cannot operate at more than

30VAC (not designed for direct connection to 120VAC

equipment).

● To avoid risk of electrical shock or equipment damage,

disconnect power before beginning installation.

The Sender is the smaller component and is installed inside

the wall behind the thermostat.

If extending the wiring between an indoor and outdoor

unit, the Sender can be placed inside the indoor unit

cabinet or grouped with other wiring.

The Receiver is the larger component and is installed

inside the cabinet of the indoor or outdoor unit. If there is

no space inside the cabinet, the Receiver may be placed

in any location without exposure to high temperatures or

water.

Connect the wires according to the relevant wiring diagram

for the system (pages 2-4). Additional wiring diagrams

can be found at www.fast-stat.com.

Note: The Sender can produce a small amount of heat

while operating. Keep the Sender wires as long as possible

to maximize the distance between the Sender and

thermostat.

● Remove the thermostat from the wall.

● If the hole where the thermostat cable wires come

through is not big enough to fit the Sender, enlarge it.

● Place the Sender in the wall and connect the wires

to the sub-base according to the appropriate wiring

diagram (pages 2-4). The Sender will hang by its wires

and does not require any mounting.

● Install the thermostat on the wall.

Testing

Troubleshooting

Internal Wiring

Electrical Safety

Sender Installation

Receiver Installation

After installation, check each control on the thermostat

(G, Y, W, etc) to ensure it is turning on and off correctly.

Activating the control on the yellow wire will activate the

load on both the yellow and green wire at the Receiver.

The Receiver’s yellow, green, and white wires are each

connected to a normally open relay. One side of the

relay is connected to transformer ‘R’ through the red

wire. Applying 24VAC to the Sender’s yellow, green, or

white wire will energize its respective relay, and connect

transformer ‘R’ to the output wire (yellow, green, or white).

For installation assistance, our technical support line can

be reached at 1-800-775-4750, 9am-5pm PST, or emailed

at info@nordictech.ca

Note: Applying 24VAC to the Sender’s yellow wire will

activate both the green and yellow relays on the Receiver.

The Model 3000’s yellow, green, and white wires can not

used for a common connection ‘C’.

W C

R To Sender

Overview

Summary of content (4 pages)

PAGE 1
Model 3000 Installation Instructions Overview Troubleshooting ●● The Model 3000 provides two additional control wires between a thermostat and indoor unit, or indoor unit and outdoor unit. 1. Measure the transformer voltage to ensure it is between 23-28VAC. If it is outside this range the Model 3000 may not work as intended. ●● It is compatible with all 24VAC heating and cooling systems. 2. ●● The Model 3000 can provide a common connection ‘C’ using a thermostat cable with 3 or more wires.
PAGE 2
A Adding an Air Conditioner to a Heat-Only System Before After Thermostat Y G W Thermostat H R Y G W R Red White Green Yellow Red Purple Note: If the installation has additional wires (C, W2, Y2, O/B, H, etc.), they can remain connected directly to the equipment terminals. Thermostat Cable Thermostat Cable Receiver Purple Yellow Green White Red Red Black To Air Conditioner Y G W Fan Heat R H C 24V Transformer Y Humid.
PAGE 3
C Upgrading to a Two-Stage Air Conditioner (Grounded Commons) Note: Unused wires should be taped back and electrically isolated from other wires. Thermostat Y2 Note: If the indoor unit does not have ‘Y1’ or ‘Y2’ terminals, the Sender should be connected directly to the thermostat cable instead. Y1 G W R Note: For this system a Model 1000 can be used.
PAGE 4
E Extending Wiring with a Fan Center Thermostat Y Sender G W H R Yellow Green White Red Red Purple Thermostat Cable Receiver Red Purple Yellow Green Red Black White Note: If the installation has additional wires (Y2, O/B, H, C), they can be connected directly to the equipment terminals provided they are powered by the Fan Center’s transformer. Model 3000 Note: A 24VAC relay will have to be installed. 24VAC Relay To Air Conditioner H Y G Fan Humid.