The HVAC Smart Relay Switch (HSRS) is an energy saving device designed to automatically shut off air conditioning or heating when a monitored door or window remains open for a preset period of time. Available in both wired & wireless packages, the system uses compatible door/window sensors – two included. For the wireless edition, choose one of the following product generations:

 

  G3-Mini G3-Basic G2-Classic
 
RF Range 200 ft. 200 ft. 100 ft.
Battery CR2032 CR123A AAA (x2)
Addressing
Perm-16M
Perm-16M
Temp-64K
Dimensions 2.2″ x 1″ x 0.25″ 3.1″ x 1.6″ x 1.2″ 3.25″ x 1.5″ x 0.5″
Wired input
No Yes
Yes
Mounting tape tape+screws tape+screws
Manual

 

  • GEN2 – Second generation classic sensors with standard operating range (100 ft). Requiring two (2) AAA batteries (not included), they are auto-addressable (up to 65,000+ possible IDs) and measure 3.25″ x 1.5″ x 0.5″. Foam mounting tape and screws are supplied. (GEN2 sensors do not store a permanent address and therefore must be initialized and re-registered whenever batteries are replaced.)
  • GEN3 – There are two available third generation sensors: mini and basic. Both feature a transmit range of 200 ft. The mini sensor operates on a single CR2032 lithium coin-cell (included). The basic sensor includes a CR123A cell. Each is pre-programmed with a unique, permanent address (over 16 million possible IDs). The mini sensor measures 2.2″H x 1″W x 0.25″D and includes foam mounting tape (no screws). The basic sensor measures 3-1/16”H x 1-9/16”W x 1-3/16”D and includes foam mounting tape and screws.
  • Notes:
    • The two product generations are not cross-compatible as they operate on different radio frequencies. Therefore, a 2nd generation controller will not accept a 3rd generation sensor. Nor will a 3rd generation controller recognize a 2nd generation sensor.
    • G2-classic and G3-basic sensors provide wired contact screw terminals for optional external wired switch (N/C) or closed contact loop. Unless you plan to utilize this input, it must be disabled to avoid inadvertent trigger. To disable, simply apply a short jumper wire across the wiring terminals.
    • RF range values are based on ideal conditions in open space. Actual results will vary for every installation. In general, wireless signals can be diminished or impeded by RF interference, concrete walls, large appliances, etc.

The HSRS is fully configurable using onboard DIP switches, allowing you to establish specific operational parameters. For instance, configure the device to temporarily disable the air conditioning or heating system when any door or window has remained open for 10 minutes and then re-enable when the door has remained closed for 1 minute. (Requires installation by a qualified hvac technician.

 

 

Features:

 
  • Automatically shuts off air conditioning or heating when a monitored door or window remains open too long
  • Accepts wired and/or wireless sensors types – two (2) included. (For additional sensors, see “Related Products” at the bottom of this page.)
  • Configurable delay period using onboard DIP switches, up to 10 hours
  • Expandable (accepts up to 4 wired zones and/or 8 wireless sensors)
  • Ideal for split (central) a/c systems
  • Compatible with most existing thermostats

(Note: Installation by a qualified hvac technician is recommended.)

 

FAQ: Will it harm my A/C compressor?

 

What’s Included:

 
  • HSRS controller with mounting flange
  • Two (2) door/window sensors. (For additional sensors, see “Related Products” at the bottom of this page.)
  • Power converter (24 vac)
  • Integrated RF receiver (wireless systems only)
  • Antenna + mounting bracket (wireless systems only)
  • Coaxial cabling (wireless systems only)
  • Warning decals – see below:

 

Notes: 

  • Though installation is not difficult, a qualified HVAC technician is recommended.
  • System includes two (2) door/window sensors. (Add-on sensors also available.)
  • Wireless sensors are battery-operated.

 

Video Tutorials:

 

Additional Info:

Details
 

Brochure:

 

User Manual:

 

Installation Mini-Guide:

 

Other Resources:

 

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Resellers

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Weight 3 lbs
For HVAC system

Central (split, ducted), Mini-split (ductless), Packaged (rooftop, etc.), Fan coil, PTAC, Window unit, Other (pls contact us)

Door/window sensor

Wireless mini (GEN3), Wireless basic (GEN3), Wireless classic (GEN2), Wired

Sensor quantity

2, 4 (+$85)

Related Products

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Will it harm my A/C compressor?

Absolutely not. First, consider that modern HVAC systems are equipped with built-in delay mechanisms to ensure that refrigerant pressures have equalized before allowing the compressor to start. Second, our HSRS controller features its own configurable re-activation delay that prevents the HVAC system from restarting until the desired time elapse. Though this feature is completely optional for most installations, we find that some customers prefer to deploy it for added peace of mind.