Honeywell C7015A Manual Do Utilizador

Página de 15
 
INSTALLATION
Fig. 
 lead sulfide photocell.
CAP
\ , MOUNTING
PLUG-IN LEAD SULFIDE CELL
(PART NO. 
METAL CABLE
SHIELDS LEADWIRES
PHOTOCELL
SOCKET
FOCUSING LENS I
Fig. O-Mounting 
 Infrared Flame
Detector (and accessories).
REFRACTORY
MAIN
FLAME
CHAMBER WALL
TEMPORARY
TACK 
 FLARED HOLE
 INCH BLACK
IRON SIGHTING PIPE
TO JUNCTION
 OR SUBBASE
 
 10 
and 11)
d.
I CAUTION
.
Disconnect power supply before beginning instal-
lation to prevent electrical shock and equipment
damage; there may be more than one disconnect
involved.
1. All wiring must comply with applicable electrical
codes, ordinances, 
and 
regulations. 
Use 
 Class 1 wiring.
 Keeptheleadwiresfromtheflamedetectortotheflame
safeguard control subbase as short as possible. Capacitance
increases with 
 length, reducing the signal strength.
The maximum permissible 
 Iength is fifty feet. 
ultimate 
 in 
 length is 
 
 signal
current/voltage. 
Refer to Table 6, Adjustments and Check-
out, page 
3. The detector comes with 
 or   in. 
or 2.44 
 leadwires inside a flexible metal cable. The
leadwires consist of a twisted pair-one brown and one
white. The two no. 18 AWG flexible-tinned leadwires are
rated for 
 F 
 C]. The cable protects and electrically
shields the leadwires.
4. If the leadwires are not long enough to reach the
terminal strip or wiring subbase, make the required splices in
a junction box (see IMPORTANT below).
5. If splicing is necessary, use moisture-resistant no. 14
wire suitable 
for 
at 
least 167” F 
 
 if 
the detector is used
 194°F 
C] if used with a flame safeguard 
programming 
control.
6. 
For splicing in high temperature installations, use
Honeywell specification no. 
 or equivalent for the
F leadwire. (This wire is rated up to 400” F 
   for
continuous duty. It is tested for operation up to 600 volts and
breakdown up to 
 volts.) For the other leadwire, use
moisture-resistant no. 14 wire selected for a temperature
rating above the maximum operating temperature.
IMPORTANT:
a.
C.
Flame detector leadwires must be as short 
sible. The maximum 
 
 
detector to the 
 safeguard control is 50 
 m].
Extensions to   
 detector leadwires must be
run alone in either rigid orflexible metal 
When 
 detector leadwires exit a conduit, they
must be as short as possible, twisted, and not be
included in bundles or channels that contain other
wires. Rigid metal conduit   
 
 
detector leadwires are extended 
 metal
conduit may be used   is supported to minimize
movement.
The 
 
 cable shield must be
grounded to   
 safeguard control subbase
either directly or through the metal cabinetlconduit
system that contains   flame safeguard control
subbase 
 detector leadwires.
When 
 detector leadwires are routed through
junction boxes, 
 the junction boxes with the
pressure-sensitive labels provided wiih the flame
detector 
 
UNDERWRITERS LABORATORIES INC. RE-
QUIRES THAT THE JUNCTION BOX BE
MARKED TO INDICATE 
 OTHER WIR-
ING CONNECTIONS CAN BE ROUTED
THROUGH IT. APPLY CAUTION STICKER
(FORM 
 FURNISHED) TO THE JUNC-
TION BOX.
Maximize the separation between ignition trans-
former high voltage wires and the 
 sensor
wires to avoid ignition interference.
60-2306-5