Toxalert Tox-Refrig - Manual (Page 2)

TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 • 952/472-4541 • 952/472-4960
www.toxalert.com
The remote refrigerant sensor(s) is continuously monitored by the controller for sensor failure. If the
sensor malfunctions, the controller shall cause the sensor LED to blink red, and activate the warning stage
relay as well as a sensor malfunction relay contact.
FEATURES

Warning (purge) stage indication

Alarm stage indication

Sensor malfunction indication

Relay outputs for control of ventilation
equipment and remote alarming (Warn,
Alarm, Sensor Malfunction)

Optional auxiliary relay contacts for
shutdown of combustion equipment

Operation meets ANSI/ASHRAE 15-2010

Digital readout (Refrigerant in PPM)

Field adjustable setpoints with security

Test function

Field selectable warning stage reset
(manual/auto)

Audible alarm (integral to control unit)

Interface to automation system (digital and/or
optional analog)

Multiple sensor inputs (optional)

Remote Alarm Capabilities

BACnet MS/TP Protocol

Optional Strobe Light
MECHANICAL ROOM REQUIREMENTS
In the Forward of ASHRAE Standard 15-2010, it states in part, “All machinery rooms are required to have detectors
that actuates an alarm and mechanical ventilation at a value not greater than the corresponding TLV-TWA (or
toxicity measure consistent therewith”. ASHRAE Standard 15-2010, section 7 & 8 requires detectors to monitor for
refrigerant leaks. The standard reads as follows:
Paragraph 8.11.2.14 reads-
“Each machinery room shall contain a detector, located in an area where refrigerant from a leak will
concentrate, that actuates an alarm and mechanical ventilation in accordance with 8.11.4 at a value not
greater than the corresponding TLV-TWA (or toxicity measure consistent therewith).”
Paragraph 8.11.6
“Combustion equipment shall not be installed in the same machinery room with refrigerant containing
equipment except under one of the following conditions:
(b) a refrigerant detector ….. is employed to automatically shut down the combustion process in the
event of refrigerant leakage.
Exception: For ammonia refer to paragraph 8.12(h).
SENSOR LOCATION:
ASHRAE Std. 15-2010- “locate in an area where refrigerant from a leak will concentrate” is very ambiguous and for
good reason. There are a wide variety of equipment room configurations and sizes.
A few keys to locating refrigerant sensors are: (1) remember that occupant safety is the primary motive for installing
the sensor; (2) determine the air flow pattern in the room; (3) the primary hazard of a refrigerant to a room occupant
is the inhalation of the toxic refrigerant.