Asco 917 User manual

1
Owner’s Manual 917 & 918
Remote Control Switches
TABLE OF CONTENTS
page
Ratings & Installation 1–2...................
Optional Accessories 3–4...................
Troubleshooting & Parts Kits 5..............
Wiring & Outline Diagrams back of manual...
DANGER is used in this manual to warn of high
voltages capable of causing shock, burns, or death.
WARNINGisusedinthismanualtowarn
of possible personal injury.
CAUTIONisusedinthismanualtowarn
of possible equipment damage.
ASCO 917 Remote Control (RC) Switches are rated
20 amperes non–HID lighting loads and 30 amperes
general purpose. ASCO 918 RC Switches are preferred
for HID (high intensity discharge) loads such as sodium
vapor, mercury vapor, and metal halide lighting (control
voltage is limited to 277 V). ASCO 918 RC Switches are
rated 30 amperes for standard ballast loads.
917
918
Catalog Number Identification with Elements Explained
Typical ASCO 917 catalog no. for 12 pole 208 volt 60 Hz control in an enclosure:
917 12 20 6 1
Pole Combinations
Product Control Voltage Accessories
X–
2
3
4
6
8
10
12
9440 – 480 V
7265 – 277 V
X347 V
917
918
Enclosure
C–
blank – open type
C
6208 – 240 V
3110 – 120 V
50 – 60 Hz
if
accessories
ordered
blank – none
Standard N/O & N/C
22 =2+2
33 =3+3
44 =4+4
66 =6+6
277 V maximum control voltage for ASCO 918
381333–006 E
50 Hanover Road, Florham Park, New Jersey 07932–1591 USA
For sales or service call 1 800 800–2726 (ASCO) www.ascopower.com
ASCO POWER TECHNOLOGIES CANADA PO Box 1238, 17 Airport Road, Brantford, Ontario, Canada N3T 5T3

ASCO 917 & 918 Owner’s Manual
2
These RC Switches are UL–508 listed and are available
in2to12polesinglethrowdoublebreakand2to6pole
normally open and normally closed configurations.
Control voltages are from 120 to 480 V ac. See tables A,
B, and C for contact ratings.
Do not exceed these values. Exceeding the
rating can cause personal injury or serious
equipment damage.
Table A – Maximum AC Voltage and Current Ratings
for ASCO 917 & 918 Main Contacts (open or closed)
L
o
a
d
Amperes
C
t
i
Poles to Load
L
o
a
d
T
y
p
e
Continuous
1
f
o
r
2
f
o
r
1
p
h
a
s
e
Type 917 918
1
f
o
r
1phase
2
f
o
r
1
p
h
a
s
e
3
f
or 3 phase
General 30 30 347 V ac 600 V ac
Standard
Ballast* 20 30** 347 V ac 600 V ac
Tungsten 20 20 250 V ac 250 V ac
Table B – Maximum DC Voltage and Current Ratings
for ASCO 917 & 918 Main Contacts (open or closed)
L
o
a
d
T
y
p
e
A
m
p
eres Poles to Load
L
oa
d
T
ype
A
m
p
e
r
e
s
Continuous 2inSeries 3inSeries
General 20 125 V dc 250 V dc
Table C – Withstand Current Ratings
for ASCO 917 & 918 Remote Control Switches
Available Symmetrical Amperes RMS
A
t
A
C
When Used with
Molded–Case Circuit Breakers
A
t
A
C
Service Voltage Withstand
Current Rating
(amperes)
Maximum
Breaker Size
(amperes)
250 V 22,000 30
480 V 14,000 30
600 V 10,000 30
* ASCO 918 is preferred for HID and metal halide loads.
** 20 A Standard Ballast Rating for ASCO 918 N/O & N/C.
Drawing Index
Drawing Description Standard RC Switch N/O & N/C RC Switch Page
RC Switch Outline & Mounting 361069 383826 6
Outline & Mounting with Accessories 363164 383897 7&8
Wiring Diagram 361068 383825 9
Wiring Diagram with Accessories 363165 383880 10 & 11
Enclosure Outline & Mounting 363104 363104 12
Installation
ASCO 917 & 918 Remote Control (RC) Switches are
pre–tested and ready to use. Installation requires
mounting and connection of service cables and control
circuit wires. An experienced licensed electrician should
install the RC Switch.
Each RC Switch has a ratings / identification label
defining load types and maximum voltage ratings. Use
theswitchonlywithinthelimitsshownonthislabel.
Do not exceed the values on the rating label.
Exceeding the rating can cause personal injury
or serious equipment damage.
To prevent malfunction or shortened life, protect
the switch from construction grit and metal chips.
Mounting: Five Outline and Mounting Diagrams are
furnished. Select the appropriate diagram and mount the
RC Switch. All mounting details and instructions are
shownonthediagrams.
The RC switch can be mounted in any position but is
usually mounted vertically. Mounting holes in open–type
RC Switches accept #10 screws (3/8–inch minimum
length). Enclosure mounting holes accept 1/4–inch
diameter screws.
Line and Load Connections
Deenergize the branch circuit to be connected
to the RC Switch and the control line too.
Four Wiring Diagrams arefurnished.Lineandload
terminals are reversible. The RC switch is UL listed for
use with 60 or 75 degrees C cable. All power wires
should enter enclosure adjacent to the RC switch
terminals. Combination knockouts are provided on
NEMA Type 1 enclosures. Line and load connections are
supplied with clamp–type terminals. These terminals
accept the wire sizes #18–10 AWG Cu. Insert appropri-
ate line and load wires and tighten clamp screws to 18
inch–pounds.

ASCO 917 & 918 Owner’s Manual
3
Control Line Connections
Control circuit connections designated L,O,Con the
right side are supplied with clamp–type terminals. These
terminals accept wire sizes #18–10 AWG Cu. Insert
appropriate control wires and tighten terminal clamp
screws to 18 inch–pounds. See the Wiring Diagrams.
Tighten all electrical connections
to 18 inch–pounds.
Install overcurrent protective devices for the
control circuit in accordance with applicable
electrical codes.
Table D lists the maximum distances and minimum wire
sizes that can be run between a control station and one
ASCO 917 or 918 Remote Control Switch.
TableD–LineRun
Wire
Size
Maximum Distance (feet)
at ac control voltage
S
i
z
e
(AWG) 120 V 240 V 277 V 347 V 480 V
14 700 2,000 2,600 3,400 5,500
12 1,050 3,100 4,100 5,600 8,800
10 1,670 5,000 6,600 9,000 14,000
Do not exceed these distances
forproperswitchoperation.
Line run can be extended by use of Control Modules.
Table E lists the ASCO 917 & 918 coil inrush current and
minimum control circuit fuse sizes.
Table E – Inrush Current / Minimum Fuse
A
m
p
s
Inrush Current / Fuse Size (amps RMS)
at ac control voltage
A
m
p
s
120 V 240 V 277 V 347 V 480 V
Inrush 5.0 2.5 2.2 1.8 1.3
Fuse 2.0 1.0 1.0 0.75 0.5
Auxiliary Contacts – Optional Accessories 14H, 14HA
These auxiliary contacts, if furnished, are installed on
theleftsideoftheRCswitch. Theauxiliarycontacts
operate along with the main contact to provide remote
indication of RC switch position (closed or open).
Each auxiliary contact provides a form C, spdt (single
pole double throw) contact rated 10 amps at 277 V ac.
Accessory 14H is one auxiliary contact, and Accessory
14HA is two auxiliary contacts. A connector with leads is
provided for each auxiliary contact. See Wiring Diagram
363165 (page 10) or 383880 (page 11) for contact
configuration, additional ratings, and wiring.
Control Modules – Optional Accessories 47, 48, 49
These control modules, if furnished, are connected and
mounted on the bottom or right side of the RC switch
depending on the number of RC switch poles or n/o and
n/c contact configuration. A control module can be field
installed by ordering the appropriate module kit.
Contact ASCO. Refer to Wiring Diagram 363165 (page
10) or 383880 (page 11).
Operation
Accessory 47 control modules are for two–wire control of
theRCswitchonly.Themodulemustbeenergizedto
close the RC switch, and de–energized to open the RC
switch.Therefore,useasingle–pole,maintained–type
control station to operate the module.
Accessory 48 control modules are for three–wire control
oftheRCswitch.Oneterminalmustbeenergizedto
close the RC switch; another terminal must be energized
to open the RC switch. If neither or both terminals are
energized, no output will occur. Therefore, use a
single–pole, double– throw, momentary–type control
station to operate the module.
Accessory 49 control modules are for Form 3 (start–stop)
control of the RC switch. The modules must be
energized to close the RC switch, and de–energized to
open the RC switch. Therefore, use one normally–
closed and one normally–open separate control stations
to operate the module.
There are four different control modules for each
Accessory 47, 48, and 49. Each module is suitable only
for the control voltage marked on it. Refer to Table F.
Ratings for the control modules are listed in Table H.

ASCO 917 & 918 Owner’s Manual
4
Table F – Accessory 47, 48, 49 module numbers
Module
Control
Voltage
2–Wire Control
Accessory
47 Modules
3–Wire Control
Accessory
48 Modules
Form 3 Control
Accessory
49 Modules
120 V
ac
429447–001 429448–001 429449–001
24 V
ac & dc
429447–002 429448–002 429449–002
240/277
Vac
429447–003 429448–003 429449–003
12 V
ac & dc
429447–004 429448–004 429449–004
Table G – Connections to Control Modules
Module Terminal Connect To
1not used
2control station for Acc. 48, 49
3control station for Acc. 47, 48, 49
4module control voltage*
5RC switch control voltage
Opre–connected to O on RC switch
Cpre–connected to C on RC switch
* For dc control modules connect terminal 4 to negative (–).
Connections
Connections to the Accessory 47, 48, and 49 control
modules are shown in Table G. Also refer to the labels in
Figure 1 and to Wiring Diagram 363165 or 383880.
Barrier screw type terminals accept #22–12 AWG Cu
control wiring. Tighten terminals to 12 inch–pounds.
The control modules have two colored leads
pre–connected to the Oand Cterminal bus on the RC
switch. A yellow wire runs between the Oterminals; and
orange/black wire runs between the Cterminals.
Connect your control wiring for the module to terminals
2,3,and4on the modules. Terminal 2is not used on
Accessory 47 and terminal 1is never used.
For dc modules be sure to
connect terminal 4 to negative (–).
Connect your control wiring for the RC switch (coil
voltage) to terminal 5on the control module and
terminal L on the RC switch. If the line voltage (service)
isthesameasthecoilvoltage,thecontrolvoltagecan
come directly from the poles of the RC switch.
Figure 1. Typical labels on control modules.
Table H – Rating for Control Modules
C
o
n
t
r
o
l
M
o
d
u
l
e
Acc. 47 Acc. 48 Acc. 49
C
on
t
ro
l
M
o
d
u
l
eAC DC AC DC AC DC
120 V ac 1.90 —1.60 —3.70 —
24 V ac & dc 0.85 0.36 0.34 0.38 0.70 0.72
240 / 277 V ac 4.00 —2.50 —6.00 —
12 V ac & dc 0.60 0.32 0.34 0.36 0.68 0.70

ASCO 917 & 918 Owner’s Manual
5
!
Trouble–Shooting The RC switch is energized. Proceed with care!
Problem Check Control Voltage Check Control Station, Wiring, Supply
RC switch does not close when
control station is closed.
Measure control voltage between
RC switch terminals L and C.
If no voltage is present, check control station
contacts, control wiring, supply fuses, and
optional accessories.
RC switch does not close when
control station is opened.
Measure control voltage between
RC switch terminals L and O.
If no voltage is present, check control station
contacts, control wiring, supply fuses, and
optional accessories.
RC switch tries to open or
close, but cannot.
Measure at least 90% control
voltage (nameplate coil voltage)
between RC switch terminals L
and C, or L and O.
Ifvoltageislow,checkcontrolwiresizeand
line run distance; see Table D on page 5. If a
transformer is used in the control line, make
sure it can handle the VA burden required;
see Table E on page 5.
RC switch closes and opens
repeatedly. —
Check control station for overlapping
contacts, and correct. Control station cannot
call on RC switch to close and open at the
same time.
RC switch closes or opens very
quickly with excessive noise.
Measure no more than 110%
control voltage (nameplate coil
voltage) between RC switch
terminals L and C, or L and O.
If voltage is high, change control supply or
change RC switch.
Manual Operation
A #8–32 screw 1 1/2 inches long can be used to manually
operate the RC switch. One is supplied in all
replacement parts kits that require manual operation.
The screw should be used for maintenance purposes
only. Remove the screw after maintence.
Do not manually operate the RC switch until all
power and control circuits are disconnected.
Open circuit breakers, then use a voltmeter to verify no
voltage is present at the RC switch at both control and
line terminal screws.
Insert the operating screw into the center of the coil and
carefully turn it clockwise until the threads engage the
cam/core.
Pull the screw outward to open the RC switch contacts;
push it in to close the contacts. Observe the buttons in
the contact block (buttons out means contacts open).
Replacement Parts
The main contact blocks and the operator coil are
available in kit form. When ordering parts, provide the
Serial No. and Catalog No. from the RC switch
nameplate. Contact your local ASCO Authorized
Representative, Sales Office, or ASI.
Included in each kit are instructions that explain how to
replace the parts. These instructions are also available
separately:
Service Bulletin 381339–021
Note: ASCO 918 RC Switches are provided with a coil
circuit specifically designed for HID lighting
applications. Do not disconnect or remove this circuit
component.
Conversion Kits
Conversion kits are available for field or distributor
modification of ASCO 917 and 918 Remote Control
Switches to allow changes in pole configuration, control
voltage, control modules, and auxiliary contacts.

ASCO 917 & 918 Owner’s Manual
6
Standard RC Switches
N/O & N/C RC Switches

ASCO 917 & 918 Owner’s Manual
7
Standard RC Switches with Accessories

ASCO 917 & 918 Owner’s Manual
8
N/O & N/C RC Switches with Accessories

ASCO 917 & 918 Owner’s Manual
9
Standard RC Switches
N/O & N/C RC Switches

ASCO 917 & 918 Owner’s Manual
10
Standard RC Switches with Accessories

ASCO 917 & 918 Owner’s Manual
11
N/O & N/C RC Switches with Accessories

ASCO 917 & 918 Owner’s Manual
12
Enclosure Outline & Mounting