Smart Relay Switch
device for heating & AC
Automatically shut off air
conditioning or heating when a monitored door or window remains open!
Special Offer -
today and your order will include additional door/window sensor
promo code FREE-SHIP06 and get free
shipping (continental U.S. only).
information about this limited-time offer.
offer ends 6/30/16
shown above is included when purchasing the wireless combo system.
a standard wired sensor is provided.)
energy consumption in schools, hospitals,
apartments, condominiums, rental properties, and more!
In an era of high fuel costs, the HVAC
Smart Relay Switch (HSRS)
lowers energy bills by eliminating wasted power
eliminates waste by monitoring open doors and windows. Accepting
wired and/or wireless sensor inputs, the HSRS
automatically interrupts the HVAC system in the event of a violation
such as a door or window that has remained open for a period of time or
a room that has been vacant. The HSRS
is a fully configurable device that provides energy efficient
control for heating and cooling
addition, the HSRS
can be used as a general
purpose controller for devices including dampers, fans, etc. The HSRS accepts one or more contact
switch closures as control inputs. Compatible with door/window
reed switches, motion sensors, toggles, pushbuttons,
etc., the HSRS can accept any
switch or sensor device having normally open or normally closed
contacts. 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 closed. Onboard DIP switches allow you to configure
mode and delay parameters.
The HSRS provides
connections for as many as 4 wired inputs or zones. Each input
single switch sensor or multiple sensors if wired in a zone
configuration (sensors are wired in series or parallel). Typical
switch sensors include
reed switches, pushbuttons, toggle switches, or other devices. (Note that the HSRS can be
configured to accept either normally-open or normally-closed
are also compatible with TTL signals. (Note:
Wired sensor cabling should be limited to 100 ft. max. at each
input. Twisted-pair shielded cables recommended.)
And, with an optional RF receiver, the HSRS also
accepts input from
compatible wireless door/window sensors, motion detectors, and key fob
transmitters. The wireless option provides inputs for up to 8
additional devices. Even deploy a combination of both
wired and wireless sensors.
The HSRS is the
ideal energy management solution, reducing power consumption and energy
costs. Simply install door / window sensors
and configure the controller with easy DIP switch settings.
for a number of venues including:
- Hotels (also see hotel
energy management solutions)
- Office buildings
- Industrial complexes
- Rental properties
- Schools & Universities
- and more!
The HSRS is also available with wired sensors!
| Shuts off air conditioning or
heating when a violation is
with existing central air
conditioning & heat pump systems
with existing HVAC equipment;
requires no thermostat modifications
Can also be
used with PTACs, window
fans, dampers, etc. (see note below)
programmable via DIP switch settings
trigger polarity, LED mode, buzzer enable, etc.
shutoff delay ranging from 1 sec.
to 10 hours
status LEDs: system
status plus switch sensor indicators
relay: 10A @ 250VAC, 5A @ 100VDC
wired inputs for monitoring up to 4 wired zones
RF receiver add-on for 8
wireless door sensors, motions sensors, or fobs
re-activate (relay on)
and de-activate (relay off) delay
modes for occupancy / vacancy detection (requires motion sensors)
switches for mode selection & configuring operational
re-activate / de-activate
block connector for user wiring
external 12VDC adapter (optional 24VAC adapter
external power converter module accepts 24VAC for use with
customized to suit your specific requirements
- Decals -
you own or manage guest lodging such as a hotel or vacation rental?
Need to remind patrons to conserve energy? Measuring approximately 3" x
4", these adhesive-backed gems make great reminders. If you
would like to have them included with your order, just let us know.
We'll be happy to provide them free of charge. Get yours today
while they last!
(Limit 2 per
order. Larger quantities available upon request and may incur a fee.)
design is available for OEM licensing. Licensing
allows your company to manufacture this item and gives you royalty-free
sales and distribution rights. Click here for
General Purpose (A/C, heater, damper,
System (complete shutoff)
here to enlarge)
For installations where traditional wire runs are not possible or may
be inconvenient, we offer a wireless option that consists of sensor
devices and RF receiver. Other compatible peripherals include
motion detectors, key fob remote transmitters, etc. Door/window sensors are shown below:
The wireless option includes antenna, coax cable and mounting hardware
with compatible connector interface for
connection to the HSRS
|Antenna, cabling & mounting
The HSRS is
ideally suited for use with split (central) systems. We
recommend mounting the HSRS controller near the air handler and routing
a length of low-voltage wire
into the unit for direct access to the 24vac transformer. (Most
any low voltage
wire will suffice such as telephone, intercom, or alarm wire - two-
or four-conductors preferred.) This
wire is needed for two primary purposes: 1) for powering the HSRS
and 2) for interrupting the HVAC's 24vac supply when a door/window
following instructions demonstrate a typical wiring installation. (The following items will be
needed: screwdriver, wire
cutter / stripper, splicing connectors and several feet or more of
Caution: Although HSRS wiring
is not complicated, only a qualified HVAC contractor, technician or
should attempt the procedure. These instructions are provided for
demonstration purposes only. The installer assumes full
a proper install and to verify all wiring modifications. While these
instructions are believed to be accurate,
we accept no liability or responsibility for possible errors or
omissions. Should you encounter any issues during an install, contact
us for free on-site phone support.
- Shut off power to the a/c
- Detach HSRS enclosure lid by
removing retaining screws.
- Remove front cover from the
- Locate low voltage (24v) wires
- Cut and strip two wire segments of desired length.
- Using splicing connectors, join
each segment in parallel with existing 24v output wires from the
- Connect remaining ends of the
spliced wire segments into HSRS power converter terminals (white
- Cut one of the existing 24v transformer
wires, creating two loose wire ends. (Note: Be sure to cut the
wire downstream of (past) the spliced connection you made in the
previous step. Cutting the wire upstream of the connection will
inadvertently shut off the HSRS controller along with the a/c system
when a door/window violation occurs.)
- Strip the two loose wire
ends. (If desired extend the loose ends using additional wire
segments and splicing connectors.)
- Connect one wire end to
HSRS terminal 12.
- Connect the remaining
wire end to terminal 13.
- Replace air handler front
- Replace HSRS cover.
- Restore a/c system power.
convenient termainal block is provided for wiring purposes. The table below lists the
(free PDF download)
Comments / Feedback
property manager of ocean-front vacation condominiums, we have had ongoing problems with guests
who leave patio doors open so they can enjoy the view. This has
in enormous electric bills, especially in summer months when the air
conditioning has run continually. We purchased and installed the
HSRS in June, 2011 and were pleased to discover an immediate
savings in our electric bills. The system has been extremely
reliable with no false detections. In fact, one day a
called to report that his air conditioning had stopped working.
When asked if any exterior doors were currently open, he replied,
"yes". After closing the door, the HSRS re-activated the a/c and
operation. I'd recommend the system to anyone looking to save
on their heating and cooling costs.
M., Hatteras, North Carolina
HSRS is our
flagship HVAC shutoff
system and is available in both wired and wireless varieties.
economical alternative to the HSRS is
our general purpose Quad
Relay Delay Switch (QRDS-1000). The QRDS-1000 is a general-purpose
relay device that can be used in any number of applications. Though
less robust than the HSRS, the
QRDS-1000 is also easily suited for HVAC
shutoff control. (We offer a free DIY tutorial in PDF format
describing how to use the QRDS-1000 for HVAC shutoff.) For additional
details, click here: