Bacharach GDC-350 Owner's Manual
Instruction 5909-9000
Operation Manual
Rev. 1 - January 2012
Product Leadership x Training x Service x Reliability
GDC-350 Operation Manual
DISCLAIMER
Under no circumstances will Bacharach, Inc. be liable for any claims, losses, or
damages resulting from or arising out of the repair or modification of this equipment
by a party other than Bacharach service technicians, or by operation or use of the
equipment other than in accordance with the printed instructions contained within this
manual or if the equipment has been improperly maintained or subjected to neglect or
accident. Any of the forgoing will void the warranty.
REVISIONS
Bacharach, Inc. makes no warranty or representation, expressed or implied including
any warranty of merchantability or fitness for purpose, with respect to this manual. All
information contained in this manual is believed to be true and accurate at the time of
printing. However, Bacharach reserves the right to make changes at any time without
notice. Revised copies of this manual can be obtained by contacting Bacharach, Inc.
Should you detect any errors or omissions in this manual, please contact the
company at the following address.
Bacharach, Inc.
621 Hunt Valley Circle
New Kensington, PA 15068-7074
USA
Toll free: 1-800-736-4666
Fax: 724-334-5001
E-mail: help@MyBacharach.com
Website: www.MyBacharach.com
In no event will Bacharach, Inc., or its officers or employees be liable for any direct,
special, incidental, or consequential damages resulting from any defect in any
manual, even if advised of the possibility of such damages.
© 2012 Bacharach, Inc.
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GDC-350 Operation Manual
IMPORTANT
READ AND UNDERSTAND THIS MANUAL PRIOR TO USING THIS INSTRUMENT.
THIS INSTRUMENT SHOULD BE INSPECTED AND CALIBRATED AT REGULAR
INTERVALS BY QUALIFIED AND TRAINED PERSONNEL. FOR MORE
INFORMATION REFER TO THE “SYSTEM MAINTENANCE” AND “CALIBRATION
PROCEDURE” SECTIONS OF THIS MANUAL.
THIS INSTRUMENT HAS NOT
HAZARDOUS OR EXPLOSION-RATED ENVIRONMENTS. FOR YOUR SAFETY,
DO NOT
EXPLOSION-RATED ENVIRONMENTS).
USE IT IN AREAS CLASSIFIED AS HAZARDOUS AREAS (E.G.,
BEEN DESIGNED TO BE INTRINSICALLY SAFE IN
PURCHASE DATE:
PURCHASED FROM:
WARNINGS
CAUTION: More than one live circuit is associated with this device.
CAUTION: Disconnect power before servicing.
Supply voltage is 24 V (nominal) DC or AC (50/60 Hz).
This product is certified for electrical shock and electrical fire hazard only.
WARRANTY POLICY
BACHARACH, INC. WARRANTS THIS INSTRUMENT TO BE FREE FROM
DEFECTS IN MATERIALS AND WORKMANSHIP FOR A PERIOD OF TWO (2)
YEARS FROM THE DATE OF PURCHASE. INDIVIDUAL SENSOR ELEMENTS
HAVE DIFFERENT WARRANTIES, CHECK WITH FACTORY FOR SPECIFIC
SENSOR WARRANTY. THE WARRANTY STATUS MAY BE AFFECTED IF THE
INSTRUMENT HAS NOT BEEN MAINTAINED AND CALIBRATED AS PER THE
INSTRUCTIONS INDICATED IN THIS MANUAL OR HAS BEEN ABUSED OR
DAMAGED IN ANY WAY. THIS INSTRUMENT IS ONLY TO BE USED FOR
PURPOSES STATED HEREIN.
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GDC-350 Operation Manual
SERVICE POLICY
BACHARACH, INC. MAINTAINS AN INSTRUMENT SERVICE FACILITY AT THE
FACTORY. SOME BACHARACH DISTRIBUTORS / AGENTS MAY ALSO HAVE
REPAIR FACILITIES, HOWEVER, BACHARACH ASSUMES NO LIABILITY FOR
SERVICE PERFORMED BY ANYONE OTHER THAN BACHARACH PERSONNEL.
REPAIRS ARE WARRANTED FOR 90 DAYS AFTER DATE OF SHIPMENT
(SENSORS, PUMPS, FILTERS AND BATTERIES HAVE INDIVIDUAL
WARRANTIES). SHOULD YOUR INSTRUMENT REQUIRE NON-WARRANTY
REPAIR, YOU MAY CONTACT THE DISTRIBUTOR FROM WHOM IT WAS
PURCHASED OR YOU MAY CONTACT BACHARACH DIRECTLY.
IF BACHARACH IS TO DO THE REPAIR WORK, SEND THE INSTRUMENT,
PREPAID, TO BACHARACH, INC. AT THE FOLLOWING ADDRESS.
BACHARACH, INC.
621 HUNT VALLEY CIRCLE
NEW KENSINGTON, PA 15068
ATTENTION: SERVICE DEPARTMENT
ALWAYS INCLUDE YOUR RMA #, ADDRESS, TELEPHONE NUMBER, CONTACT
NAME, SHIPPING/BILLING INFORMATION AND A DESCRIPTION OF THE
DEFECT AS YOU PERCEIVE IT. YOU WILL BE CONTACTED WITH A COST
ESTIMATE FOR EXPECTED REPAIRS PRIOR TO THE PERFORMANCE OF ANY
SERVICE WORK. FOR LIABILITY REASONS, BACHARACH HAS A POLICY OF
PERFORMING ALL NEEDED REPAIRS TO RESTORE THE INSTRUMENT TO
FULL OPERATING CONDITION.
PRIOR TO SHIPPING EQUIPMENT TO BACHARACH, CONTACT OUR OFFICE
FOR AN RMA # (RETURNED MERCHANDISE AUTHORIZATION). ALL
RETURNED GOODS MUST BE ACCOMPANIED WITH AN RMA NUMBER.
PACK THE EQUIPMENT WELL (IN ITS ORIGINAL PACKING IF POSSIBLE), AS
BACHARACH CANNOT BE HELD RESPONSIBLE FOR ANY DAMAGE INCURRED
DURING SHIPPING TO OUR FACILITY.
NOTICES
COPYRIGHTS: THIS MANUAL IS SUBJECT TO COPYRIGHT PROTECTION; ALL
RIGHTS ARE RESERVED UNDER INTERNATIONAL AND DOMESTIC
COPYRIGHT LAWS. THIS MANUAL MAY NOT BE COPIED OR TRANSLATED, IN
WHOLE OR IN PART, IN ANY MANNER OR FORMAT, WITHOUT THE WRITTEN
PERMISSION OF BACHARACH, INC.
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TABLE OF CONTENTS
1. OVERVIEW ................................................................................................................ 1
1.1. General Description ............................................................................................ 1
1.2. Key Exterior Components ................................................................................... 1
1.3. Key Interior Components .................................................................................... 2
1.4. Sensor Aging and Calibration Extending Firmware (CEF) ................................... 3
2. SPECIFICATIONS ..................................................................................................... 3
2.1. Controller Specifications ..................................................................................... 3
2.2. Sensor Specifications ......................................................................................... 5
2.3. Model Designations ............................................................................................ 6
3. INSTALLATION ......................................................................................................... 8
3.1. Sensor Mounting Heights .................................................................................... 8
3.2. Basic Enclosure .................................................................................................. 8
3.3. Remote Sensor Housing for Solid-State Sensors ................................................ 9
3.4. Detailed Wiring Connections (Types A, B, and D) ............................................... 9
3.5. Detailed Wiring Connections (Type E) ...............................................................10
3.6. Wiring the GDC-350 for Power ..........................................................................10
3.7. Wiring Remote Sensors (Voltage and Signal) ....................................................12
3.8. Wiring Relay Connections ..................................................................................12
3.9. Installation Example 1: Type “A” with Enclosed Transformer ..............................13
3.10. Installation Example 2: Type “B” with Remote Solid-State Sensor ....................14
3.11. Installation Example 3: Type “D” with On-Board and Remote Sensors .............15
3.12. Installation Example 4: Type “E” with Two On-Board Sensors .........................16
3.13. Powering On the GDC-350 ..............................................................................16
4. CONFIGURATION AND OPERATION ..................................................................... 16
4.1. General ..............................................................................................................16
4.2. Test Functions ...................................................................................................17
4.3. DIP Switch Settings ...........................................................................................18
4.4. System Jumpers ................................................................................................19
4.5. Adjusting Alarm Setpoints ..................................................................................21
4.6. Relay Time Delays .............................................................................................23
4.7. Temperature Display – Unit of Measure .............................................................25
4.8. Latching Relay Function ....................................................................................25
4.9. LED Digital Display ............................................................................................26
5. CALIBRATION ......................................................................................................... 27
5.1. Calibration Specifications ...................................................................................27
5.2. Frequency Recommendations ...........................................................................27
5.3. Calculating the Span Gas Value ........................................................................28
5.4. Calibrating the On-Board Sensor .......................................................................29
5.5. Calibrating a Second On-Board Sensor .............................................................30
5.6. Calibrating a Remote Solid-State Sensor ...........................................................30
5.7. Calibrating 4-20 mA Signal for Incoming Analog Transmitter .............................32
6. SYSTEM MAINTENANCE........................................................................................ 33
7. COMMON ACCESSORIES, OPTIONS, AND REPLACEMENT PARTS .................. 34
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1. OVERVIEW
1.1. General Description
The GDC-350 is an economical, self-contained gas detector for non-hazardous (nonexplosion rated) commercial applications. It is available in two basic configurations:
single-sensor models and dual-sensor models. The sensors can be configured as
one of the following:
x one on-board (A type)
x one remote (B type)
x one on-board and
x two on-board (E type).
A basic system provides LEDs to indicate Power, Fail, Low (Warning) Gas Alarm, and
High Gas Alarm. Also included are an integral audible alarm with door-mounted
silence push-button, audible time delay, field-settable relay time delays and two alarm
relays.
Gas-specific electrochemical sensors for toxic gases and oxygen are available while
MOS solid-state sensors for combustible gases, TVOCs, and refrigerants are also
available. All GDC-350 on-board sensors are packaged as plug-in “smart” sensor
modules to reduce field maintenance time.
one remote (D type)
1.2. Key Exterior Components
Figure 1-1. Standard GDC-350 Components
NOTE: Photos of the GDC-350 in this manual may show the optional
LED digital display and/or the optional splash guard.
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Figure 1-2. Water Tight GDC-350 Components
1.3. Key Interior Components
Figure 1-3. Interior Components of the GDC-350
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1.4. Sensor Aging and Calibration Extending Firmware (CEF)
GDC-350 systems with on-board electrochemical sensors have been programmed
with our CEF (Calibration Extending Firmware). This firmware takes into
consideration the aging of the electrochemical CO, NO and NO
frequent calibrations are acceptable in non-critical applications such as parking
garages. The system tracks the age of the sensor and automatically compensates for
the degraded output of the sensor as it ages.
2. SPECIFICATIONS
2.1. Controller Specifications
Categories/Subcategories Descriptions
sensors so that less
2
Enclosure
Wiring
Type
Dimensions
H x W x D
Weight
Construction
Power
Remote
Sensor
Standard (NEMA 1X) Water Tight (NEMA 4X)
5.25 x 6.75 x 2.63 (in)
133 x 172 x 67 (mm)
5.13 x 7.13 x 4.00 (in)
130 x 181 x 102 (mm)
1.2 lbs (0.6 kg) 1.4 lbs (0.7 kg)
Polycarbonate with
hinged, secured door
(drip resistant)
Polycarbonate with
hinged, secured door
(water tight)
24 V (nominal), DC or AC (50/60 Hz)
500’ maximum distance between controller and
remote sensor using minimum 18 gauge wire
Common set of LED indicators (4) for:
Power, Fail, Low (Warning) Gas Alarm,
High Gas Alarm
Sensor indicators (2) for:
Sensor 1, Sensor 2
4-digit 8-segment LED digital display (optional)
Integral alarm rated 80 dB @ 10’
Push-button to silence audible alarm
Two DPDT dry-contact relays (rated 5 A @ 240 VAC)
Low Gas Alarm “On” Delay (on “make”) 5 min
Low Gas Alarm “Off” Delay
3
(on “break”) 10 min
High Gas Alarm “On” Delay (on “make”) 5 min
Audible Alarm “On” Delay (on “make”) 5 min
Audible Alarm Feature (on/off)
0° to 40° C (32° to 104° F)
0 to 95% RH non-condensing
User
Interface
Control
Settings
2
(DIP Switch)
Environmental
Display
Audio
Buttons
Relays
Relays
Audio
Temperature
Humidity
1
System is configured such that all relays are “FAIL SAFE” (relay coils are always
energized in non-alarm state). Relays are “common” to both channels (activated by
either channel).
2
May be set by user
3
Also known as “minimum run time”
1
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GDC-350 Operation Manual
Figure 2-1. Standard Enclosure Dimensions
Figure 2-2. Water-Tight Enclosure Dimensions
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2.2. Sensor Specifications
Categories/Subcategories Descriptions
Response: <30 seconds to 90% of signal
response
Temp Range: 0° C to +50° C (operating)
Repeatability: ±10% of set point
Life Span: 2 to 3 years in air (under normal
conditions)
Gases: CO, NO, NO
On-Board
Sensors
Electrochemical
(Gas Specific)
1
, SO2 (gas-specific)
2
Temperature
Range: -20° to 40° C (-4° to 104° F)
Response: <35 seconds to 90% of signal
response
Temp Range: 0° C to +40° C (operating)
Solid-state
Combustibles
(Non-specific)
Repeatability: ±10% of set point
Life Span: 5+ years in air (under normal
conditions)
Gases: E.g., Propane (C
vapors, methane (CH
), gasoline
3H8
) (non-
4
specific combustibles)
Response: <120 seconds to 90% of signal
response
Temp Range: 0° C to +40° C (operating)
Remote
Sensors
Long Term
Drift: < 5% signal loss / month at
ambient temperatures
Solid-state
Refrigerants
(Non-specific)
Repeatability: ±10% of set point
Life Span: 4-5+ years in air
Typical
Refrigerant Gas
Sensors
Available: R11, R12, R22, R123,
R134A, R404A, R407C,
R410A, R422A, R422D,
R438A, and R507
2
Analog transmitter
4-20 mA signal
1
All integral electrochemical gas sensors are packaged as “Smart” sensor modules.
2
Supports any 4-20 mA analog transmitter manufactured by Bacharach.
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2.3. Model Designations
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