QUADSET REFRIGERANT GAS MONITOR

Bull QD-RF

                                                                                                                        January 2006

R-11, R-12, R-22, R-123, R-134a, R401, R404 and others

FEATURES
·	High-accuracy Refrigerant-specific NDIR sensor
·	Up to 4 points of detection

·	Diffusion (RS-485) or Sample-Draw
·	4-line LCD and Removable Keypad

PHOTO

·	3-Stage relay output with LED status indicators
·	Optional- 4-20mA output
·	Easy to install and maintain
·	Meets and exceeds ANSI/ASHRAE 15-1994

APPLICATIONS
·	Suitable for control of emergency ventilation systems and for personnel protection
·	Refrigerant leak or spill detection from chillers, pipes, compressors and valves
·	Commercial or industrial facilities using chillers or refrigeration units, food
plants, meat-packing plants and cryogenic plants
·	Direct connection to the existing Building Management System (BMS) or DDCS

The Acme Quadset Refrigerant Gas Monitor is designed to detect refrigerant leaks in
enclosed areas.  The Monitor utilizes a sophisticated NDIR sensor specific to any one
of the commercially available refrigerants.  It can monitor over a range of 0-1000ppm
with a resolution threshold as low as 1ppm.

The Quadset can monitor up to four locations in one of two modes of operation,
diffusion or sample-draw.  In the diffusion mode, up to four RF-IR-ST-24 Refrigerant
Sensor/Transmitters can be daisy-chained to the Monitor and transmit data on a RS-
485 communication bus. In the sample-draw mode, built-in diaphragm pumps
continuously draw air samples from the four locations via tubing, the incoming
samples are then diverted to a built-in sensor by means of a sequencer and solenoid
valves.

The Quadset is easy to install and maintain. It has a 4-line backlit LCD for refrigerant
gas readings and LED indicators for relay output status.  The LCD is also used for
programming system parameters via a removable keypad.  The standard monitor has
a 3-stage relay output configuration and a malfunction relay. Options include 4-20mA
analog outputs per channel, a strobe light and a horn.

Designed to act as a fixed in-situ safety monitor, the Quadset automatically operates
the mechanical ventilation system of a facility upon detection of low levels of
refrigerants, thereby protecting occupants, personnel and gas-sensitive goods and
products.

With the increased use of gas detection in maintenance and industrial facilities, the
Quadset allows installers and users to meet code requirements in an economical fashion
using commercial-grade gas detection equipment.

The Quadset contains all the well-known standard features of ACME’s gas detection line;
a robust enclosure, the latest sensor technology and state-of-the-art electronics.  For more
versatile gas options, please consult the ACME binder or website.

SPECIFICATIONS:

Gases detected:

Sensor Technology:

Sensing Method:

Detection Range:

Resolution:

Accuracy:

Response Time (T90%):

Power Requirements:

Outputs:

Operating Temperature:

Humidity Range:

Expected Lifetime:

Enclosure:

Dimensions:

R-11, R-12, R-22, R-123, R-134a, R-401, R-404 and others

NDIR Infrared

Diffusion or Sample-draw

0-1000ppm

1ppm

+/- 5ppm

60 seconds

24V or 120V or 240V 50/60 Hz

3-stage Relay; Contact rating 3A @ 120VAC inductive
4-20mA

32ºF to 104ºF (0ºC to +40ºC)

0-95% RH Non-condensing

>10 years

NEMA 1
Metal with locked door
Grey
Surface Mounting

16” x 12”x 6” (400mm x 300mm x 150mm)

Recommended Calibration: Every 6 months

ORDERING INFORMATION:

MODEL NUMBER

GAS DETECTED

R11-QDRF-X*-Y**-Z***	R-11
R12-QDRF-X*- Y**-Z***	R-12
R22-QDRF-X*- Y**-Z***	R-22
R123-QDRF-X*- Y**-Z*** R-123
R134-QDRF-X*- Y**-Z*** R-134a
R401-QDRF-X*- Y**-Z*** R-401
R404-QDRF-X*- Y**-Z*** R-404

POWER SUPPLY OPTIONS

*X
24
120
240

LINE VOLTAGE
24 V 50/60 HZ
120V 50/60 HZ
240V 50/60 HZ

OUTPUT OPTIONS (ADDITIONAL TO STANDARD 3-STAGE RELAY
CONFIGURATION)

**Y=1; 4-20mA outputs
**Y=0; or leave empty if not required

***Z=SH; for built-in strobe/horn
***Z=RSH; for remote strobe/horn
***Z=0; or leave empty if not required

Typical Wiring Diagram Diffusion