Post on 06-Mar-2018
GENERAL INFORMATION
Larson Electronics explosion proof fixtures meet requirements of UL
Standard 844 and 595 and CSA Standard C22.2. No. 137 regarding
electric lighting fixtures for use in Class I, Division 1, Groups C and
D and Class II, Division 1, Groups F and G hazardous areas and
suitable for wet locations. Also listed as marine type electric fixture,
outside type {salt water). For marine applications, installation must
be in accordance with USCG 46 CFR parts 110 thru 113
NOTE:
Refer to Tables 2 and 3 for operating
classifications of specific wattages.
MOUNTING AND WIRING
This fixture is designed for wall or post mounting and requires a flat
vertical surface 3 in. (76.0mm) wide by 40 in. (1016mm) high. The
fixture is supplied with 72 in. (1830mm) of #16 gauge wire for
connecting at the wall mounted switch or junction box through 1/2in.
size flexible coupling. The wire entrance to the light head is factory
sealed.
Wiring must comply with Class I Division 1 (paragraph 501-4) and
Class II Division 1 (paragraph 502-4) wiring methods defined in
"National Electric Code 1984." Flexible coupling, junction box and
any other part required to complete wiring aren't furnished with the
fixture. These items may be purchased from a local electrical
distributor. (Refer to Table 1 for a description of acceptable
components)
Follow these steps to install the fixture:
1. Locate fixture at desired height on wall or other
permanent support Fasten wall mounting plate with four
3/8 in. (10mm) bolts. (These are not furnished.) See
Figure 1. If it is necessary to mount light head as shown
in the alternate mounting position, (a) remove the
hardware identified in Item 30 "m the parts list; (b) rotate
the head with attached bracket 90 degrees, and (c)
reinsert hardware in Item 30 and tighten to obtain desired
movement.
2 Locate power supply junction box or switch 28-3/4 in.
(730mm) from the fixture arm as shown in Figure 1. It is
important to place the power supply junction box in line
with the fixture arm's axis of rotation in order to minimize
the amount of bending to the flexible coupling. Proper
installation will insure a minimum bend radius of 10
inches (254mm) on the flexible coupling.
3 Attach 45° elbow and Y* inch size close nipple to sealed
fitting and tighten. The open end of the elbow must be
directed at the fixture wall mount after tightening.
4 Assemble flexible coupling, two dose nipples, expansion
union and junction box and route wiring a's shown in
Figure 1.
NOTE
All threaded connections must engage
five full threads.
5. Avoid placing fixture in a position that would (a) trap the
flexible coupling; or (b) cause the flexible coupling to form
less than a 10 inch {254mm) bending radius.
Figure 1
CAUTION
ALTERNATE MOUNTING
POSITION (Class 1 application only)
Mounting dimension from bottom surface of mounting Arm to
top outlet box must be held to maintain a minimum Bending
radius of 10 inches (254) on the flexible coupling.
NOTE
All threaded connections must engage at least five full
threads.
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All wiring should be done by licensed
electricians in accordance with state and
local codes plus NEC standards.
Improper installation may result in serious
injury.
Use only UL listed components suitable for Class I.
Division 1. Groups C and D and Class II, Division 1,
Groups F and G installation. They can be obtained
from a local distributor.
TABLE 1
Item in: Fig. 1
Acceptable Components - UL Listed for Wiring Fixtures in Item in Class 1, Division V Groups C and 0 and Class II. Division t.
Groups F and G Installations
A 1/2in size diameter flexible coupling. 36 in. (914mm) long with two removable close nipples
B 1/2m Size diameter male expansion union - standard length.
C 45' elbow for 1/2m size conduit.
D 1/2in close nipple
AIMING
Aiming along a horizontal plane (azimuth) is accomplished by
swinging the wall mounted arm through 180° to the desired
direction, and/or by rotating the fixture head through 230° to the
desired direction. The fixture head can be aimed vertically
through 74° of arc, 14° above and 60° below the horizontal.
NOTE : The fixture head movement is limited to
prevent bending the 1/2in. Size flexible coupling
beyond its recommended 10 in. (254mm) minimum
bending radius.
Disconnect power before relamping
REMOVAL OF COVER
To lamp or relamp, the cover must be unscrewed. In most
cases, a rectangular steel bar about 3/4 in. (19mm) x 1/2in.
(12.7mm) x approximately 30 in. (760mm) can be placed
between the lugs provided on the face of the cover and rotated
counter-clockwise to accomplish toe removal. See Figure2.
Excessive force must not be used as the bar may slip and cause
injury.
Handle lamp with care when removing and replacing. The lamps
are vacuum jacketed and may implode if broken. For safety,
wear safety glasses and gloves when removing and replacing a
lamp.
When relamping, clean the reflector and cover glass to maintain
efficiency. The glass may be cleaned with any non-abrasive
conventional glass cleaner The reflector should be cleaned with
a soft cloth using soapy water
Figure 2
CAUTION CAUTION
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REPLACEMENT OF COVER
Before replacing the cover, thoroughly dean the threads in both
the cover and shell (Item 1 in repair illustration) then lubricate
these threads liberally with a non-drying grease or petrolatum.
This will enable the cover to be turned more easily and will
facilitate its removal later for relamping.
Thread the cover onto the shell by hand until the cover contacts
the shell 0-ring. Use the rectangular steel bar
to rotate the cover another 1/12th to 1/10th of
a turn or between 2.5 in. (63mm) and 3 in.
(76mm) measured on the outside diameter.
ALTERNATE COVER REMOVAL
SPECIAL TOOL – WELDED CONSTRUCTION
Use of the rectangular bar may not be adequate if the cover
has tightened to the point of seizure. A more secure method of
removal, employing a strap wrench and a special holding tool,
is shown in Figure 4. For the wrench, we recommend RIDGID*
Model No. 5 (Cat No. 3136500) Strap Wrench with a 48 in.
(1200mm) strap, or an equal product The special tool, to hold
the shell while the cove is turned with the strap wrench, must
be fabricated. A suggested configuration is shown in Figure 4
Figure 3
Attach the special tool to the upper tapped boss on the shell
with a 3/8 in. (10mm) -16 x 1 in (25.4mm) capscrew. Apply the
strap wrench as shown. The cover then can be loosened and
removed by rotating it counter-clockwise with the strap
wrench, while holding the shell with the special tool.
Figure 4
COVER GLASS REPLACEMENT
If the Cover Glass (Item 13 in Repair Parts Illustration) is to be
replaced, first loosen the Retaining Ring (Item 12) by turning it
counterclockwise with a hammer and drift punch applied to the
lugs on the ring. Once loose, it may be rotated out by hand.
Remove the Cover Glass and Cover 0-Ring (Item 16} which
should also be replaced
Threads in the Cover, the Retaining Ring and the Shell should be
thoroughly cleaned and then lubricated liberally with a non-drying
grease or petrolatum to facilitate assembly and disassembly and
to inhibit corrosion After replacement of the Cover, 0-Ring and the
Cover Glass, the Retaining Ring must be tightened against the
glass with the hammer and the drift punch until the clearance
between the Cover Glass and the Cover is such that a .0015 in.
(.04mm) feeler will not enter the joint more than 1/8 in. (3.2mm) at
any point, as shown in Fig. 5.
FRICTION JOINT FEATURE
The Friction Joint (See Fig. 1) permits hand adjustment of the
light head. If the friction joint loosens, lighten the locknut part
of the joint to restore original tension. Do not lubricate the
friction joint
Figure 5
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REPAIR PARTS ILLUSTRATION
FOR INCANDESCENT FIXTURE
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TABLE 2
OPERATING CLASSIFICATIONS - High Pressure Sodium (HPS) Models
CLASS III
DLX-35N
DLX-50N
DLX-70N
DLX-70MH-N
1. Operate HPS fixtures ONLY with the proper lamp. (Seenameplate for lamp information).
2. In event of lamp failure, replace lamp or disconnectprimary power to ballast within two weeks at the verymost. Otherwise, permanent damage to electricalcomponents from dielectric stresses may result from (fiehigh voltage starting pulses unique to high pressuresodium circuits.
3. Use protective gloves and protective eye equipment whenreplacing lamps.
4. If outer glass of HPS lamp bulb is broken, turn off thefixture and replace the lamp promptly to avoid exposure toultraviolet energy. Even with lamp outer glass enclosurebroken, the arc tube may continue to fire, the arc tubescontain sodium. Use appropriate care in disposal of failedor broken lamps.
5. To avoid fire or explosion, maximum allowabletemperatures have been established for various classesand groups defined as hazardous zones. Table 2 lists theHID lamps and Table 3 the incandescent lamps that maybe safely used in the Class I and Class II zones withGroup C, D. F. or G materials.
6. To avoid fire or explosion, maximum allowabletemperatures have been established for various classesand groups defined as hazardous zones. Table 2 lists theHID lamps and Table 3 the incandescent lamps that maybe safely used in the Class I and Class II zones withGroup C, D, F, or G materials.
FIXTURE MODEL NO
CLEAR HID LAMP
ANSI CODE NO.
WATTS
PHONEX LAMP
NO
CLASS I
DIVISION 1
CLASS I DIVISION 1
MAX
AMBIENT
TEMP F/C °
GROUP MAX TEMP CODE F/C °
GROUP MAX TEMP CODE F/C°
DLX-150N S76 35 4212200 C & D T4A 248/1 20 F & G T3C 320/160
104/40
DLX-50N S66 50 4211300 C & D T4A 248/1 20 F & G TX 320/1 60
DLX-70N S62 70 4212600 C & D T4A 248/1 20 F & G T3C 320/1 60
DLX-100N 354 100 4212700 C & D T4A 248/1 20 F Only T3C 320/1 60
DLX-150N S55 150 4212800 C & D T3C 320/160 NOT RECOMMENDED 77/25
DLX-70-MH-N 70 422012 C & D 74 275/135 F & G 74275/135 104/40
CAUTION
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TABLE 3
OPERATING CLASSIFICATIONS- Incandescent (INC) Model
FIXTURE MODEL NO
120 COLT LAMP TYPE
WATTS PHONEX
LAMP NO
CLASS I DIVISION 1
CLASS I DIVISION 1
MAX AMBIENT TEMP F/C
° GROUP
MAX TEMP CODE F/C
°
GROUP MAX TEMP CODE F/C°
DLX-INCN
110R30/FL/RS 110 4212900 C & D T4A
360/180 F Only T3C 392/200
104/40
150 PAR/FL 150 4201100 C & D T4A
356/180 NOT RECOMENDED
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