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Figure 2-18.  Alternate Four and Six Leadwire Connections Between Control Module and Detectors of Paired Detector System
INSTALLING WIRES FOR ALARM AND CONTROL DEVICES, ALL MODELS

TM-10-6665-297-13P Bacharach Combustibles Gas Alarm System NSN 6665-00-410-4982 Manual
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TM 10-6665-297-13&P 2-6 DETECTOR INSTALLATION  (continued) 2-6.2.1  Installing Single Detector on CD800/830 or CD802/832 Control Unit (continued) 2.   Connect  a  black  wire  between  detector  reference  element  lead  (black,  banded  “R”)  and  control module terminal marked DET 1, R. 3.   Connect  a  white  wire  between  detector  single  output  lead  (white,  banded  “C”)  and  control  module terminal marked DET 1, C. 2-6.2.2  Installing Second Detector on One Module, Models CD802/832.   Install a single detector as follows (Figures 2-8 through 2-11): 1.   Disconnect and remove 15-ohm paired resistor factory-installed on DET 2 terminals A, R, and C. 2.   Connect a green wire between detector green lead and control module terminal marked DET 2, A. 3.   Connect a black wire between detector black lead and control module terminal marked DET 2, R. 4.   Connect a white wire between detector white lead and control module terminal marked DET 2, C. 2-6.3 INSTALLING SECOND DETECTOR FOR CD800/830 SINGLE-CHANNEL MODULES If two detectors are to be operated from a single CD800/830 control module, wires must be installed to connect  the  leads  of  the  second  detector  to  an  inter-  mediate  junction  box  or  to  the  control  module terminals  marked  DET  2,  A,  R,  and  C,  as  shown  in  Figure  2-18.    (If  a  single  detector  only  is  to  be connected   to   a   module,   factory-installed,   15-ohm,   paired   resistors   are   connected   across   DET   2 terminals A and C and C and R.) Maximum resistance allowable in A and R conduit wires is 2.5 ohms per  wire  (or  5  ohms  total  A  and  R  loop  resistance,  with  A  and  R  wire  resistances  the  same  within  1 ohm).    A  2.5-ohm  maximum  resistance  is  allowable  where  two  detectors  to  a  single  module  are installed.  Wire gauge must therefore be determined with respect to length as follows: Power supply wires A and R: 0-620 Feet: #16 AWG 620-980 Feet: #14 AWG over 980 Feet: calculate from Table 2-2 or Figure 2-17 Signal return wire C: 0-1100 Feet: #20 AWG over 1100 Feet: #18 AWG 23-9617 7/26/85 2-26







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