Install Instructions

ManualsBrandsFast-Stat ManualsHeating SuppliesModel 1000 HVAC Wiring Extender

Page 1 of 4 www.fast-stat.com

Model 1000

Installation Instructions

● The Model 1000 provides an additional control wire

between a thermostat and indoor unit, or indoor unit

and outdoor unit.

● Compatible with all 24VAC heating and cooling

systems.

● 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 FAST-STAT

Common Maker.

1. Measure the transformer voltage to ensure it is

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

Model 1000 may not work as intended.

2. Smart thermostats may not automatically detect

the connected equipment when using a Model 1000.

These connections must be manually configured in

the thermostat’s settings.

3. Jumper the Receiver’s purple wire to transformer ‘R’.

Both relays in the Receiver should energize, outputting

24VAC on the Receiver’s green and yellow wires. If the

relays won’t energize from this test, then the Receiver

may be faulty.

4. At the thermostat, jumper the thermostat wire

connected to the Receiver’s purple wire to thermostat

‘R’. This should energize both relays in the Receiver

and output 24VAC on the Receiver’s green and

yellow wires. If the relays do not energize, there is an

problem with the connection between the Sender’s

and Receiver’s purple wires.

5. Jumper the Sender’s green wire to thermostat ‘R’. This

should output 24VAC on the Receiver’s green wire.

Repeat the test with the yellow wire. If the output

wires do not measure 24VAC when activated, there is

a problem with the Sender. If this test was successful

then there is a problem with the thermostat.

● 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 has purple,

yellow, and green wires. It is installed in the wall behind

the thermostat.

The Receiver is the larger component and has red, black,

purple, yellow, and green wires. It is typically installed in

the indoor unit cabinet, or a location without exposure to

liquids or high temperatures.

Find the relevant wiring diagram for the system (pages

2-4) and connect the wires accordingly.

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.

● Remove the thermostat from the wall.

● Place the Sender in the wall and connect the wires to

the sub-base according to the relevant wiring diagram

(pages 2-4) for the system. The Sender will hang by its

wires and does not require any mounting.

● Place the thermostat back on the wall.

Overview

Testing

Troubleshooting

Internal Wiring

Electrical Safety

Sender Installation

Receiver Installation

After the Model 1000 has been installed, check each

control to ensure it is working correctly:

If the Model 1000 does not work as intended, proceed

to Troubleshooting to check for manufacturing defects,

installation errors, and other issues.

1. Use the thermostat to activate the equipment on the

green wire and check that it turns on and off correctly.

2. Use the thermostat to activate the equipment on the

yellow wire and check that it turns on and off correctly.

The Receiver’s green and yellow wires are each connected

to a relay. One side of the relay is connected to transformer

‘R’ through the red wire. When a relay is energized, it

connects transformer ‘R’ to the respective green or yellow

output wire.

For installation assistance, our technical support line can

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

at info@nordictech.ca

The power for the relay coils travels through the purple and

black wires. The load side of the relays is not connected to

the coil side.

To Sender

RELAYS

Summary of content (4 pages)

PAGE 1
Model 1000 Installation Instructions Overview Troubleshooting ●● The Model 1000 provides an additional control wire 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 1000 may not work as intended. ●● Compatible with all 24VAC heating and cooling systems. 2. ●● Can provide a common connection ‘C’ using a thermostat cable with 3 or more wires.
PAGE 2
A Adding a Common Wire Before After R H Y G Sender Thermostat Thermostat R C Y G Yellow Green Purple Note: If the installation has additional wires (W2, Y2, O/B, H, etc), they can remain connected directly to the equipment terminals. Thermostat Cable To Air Conditioner Receiver Purple Red Black Green Yellow To Air Conditioner R C Y G H Fan 24V Transformer Humid.
PAGE 3
C Upgrading to a Two-Stage Air Conditioner Thermostat Note: If the outdoor unit does not have an ‘R’ terminal, the Receiver’s red wire should be connected directly to the transformer instead. Y2 Note: If the indoor unit does not have ‘Y1’ or ‘Y2’ terminals, the Sender should be connected directly to the thermostat cable instead. G Y1 W R Sender Note: An external 24VAC transformer will have to be installed.
PAGE 4
E Upgrading from a Single-Stage Air Conditioner to a Single-Stage Heat Pump Thermostat Note: A 24V relay is required to electrically isolate the heat pump from the indoor unit. Y O/B Note: If the heat pump does not need a ‘W’ connection, the wiring from diagram C or D can be used with the green wire connected to ‘O/B’. G W R Sender Note: An external 24VAC transformer and 24VAC relay will have to be installed.