Robertshaw 365A User manual

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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INSTRUCTION MANUAL
FOR
MODEL 365A & E365A
VIBRASWITCH®MALFUNCTION DETECTOR
Robertshaw Industrial Products
1506 Mustang Drive
Maryville, Tennessee 37801
Phone: [phone] Fax: [phone]
INSTRUCTION MANUAL NUMBER
909GF294G

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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TABLE OF CONTENTS
SECTION PAGE
1 DESCRIPTION .................................................................................................................... 1
1.1 General .................................................................................................................................... 1
1.2 Model Identification .................................................................................................................. 1
2 SPECIFICATIONS .................................................................................................. 2
2.1 Environmental .......................................................................................................................... 2
2.2 Electrical .................................................................................................................................. 2
2.3 Performance ............................................................................................................................ 2
2.4 Enclosure ................................................................................................................................. 2
2.5 Agency Certification ................................................................................................................. 2
3 INSTALLATION ...................................................................................................... 3
3.1 General .................................................................................................................................... 3
3.2 Mounting .................................................................................................................................. 3
3.3 Space Heater ........................................................................................................................... 3
3.4 Wiring ....................................................................................................................................... 6
4 OPERATION ........................................................................................................... 9
4.1 Operation ................................................................................................................................. 9
4.2 Adjustment of Operating Setpoint ............................................................................................ 9
5 MAINTENANCE .................................................................................................... 12
5.1 Trouble Shooting ................................................................................................................... 12
5.2 Replacement (Spare) Parts ................................................................................................... 13
5.3 Repairs ................................................................................................................................... 13
5.4 Routine Maintenance ............................................................................................................. 14
ILLUSTRATIONS
FIGURE PAGE
3-1 Methods of Mounting the Vibraswitch ....................................................................................... 4
3-2 Dimensions ................................................................................................................................ 5
3-3 External Wiring Connections ..................................................................................................... 6
3-4 Terminal Configurations ............................................................................................................ 7
3-5 Preparation of Conduit Wiring ................................................................................................... 8
3-6 Connection of Conduit Wiring .................................................................................................... 8
4-1 Operating Principal for the Vibraswitch ..................................................................................... 9
4-2 Setpoint Adjustment ................................................................................................................ 10
4-3 Setpoint Alarm Settings ........................................................................................................... 11
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MODEL 365A & E365A VIBRASWITCHES 909GF294G
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Section 1 – DESCRIPTION
1.1 GENERAL
The Model 365A and E365A Vibraswitches provide
maximum protection for large motors, pumps,
compressors, and other rotating equipment by
responding to mechanical malfunctions the instant
they occur. Failing bearings, bent shafts, broken
blades, overspeeding and similar malfunctions cause
increased imbalance or high frequency vibration
detectable with the Model 365A and E365A
Vibraswitches. The instruments may be wired to
actuate an alarm or cause a shutdown before costly
damage occurs. They are designed for
maintenance-free service in permanent installations.
The Vibraswitches are acceleration sensitive
instruments. Acceleratory measurements made by
the Vibraswitches are the summation of all the
individual accelerations giving a total destructive force
acting on the machine - the result is positive
protection.
Vibraswitches may be supplied with or without a reset
coil. Reset coils may be used with external time delays
for preventing false trips on those machines with
excessive start-up vibration by applying the rated
voltage during machine start-up (for 4 minutes
maximum). Reset coils may also be used to reset the
Vibraswitch from a remote location by applying the
rated voltage.
Space heaters are intended to prevent condensation
in the enclosure caused by climate conditions in some
outdoor installations. Space heaters require constant
power and are not required in most applications.
With the growing use of computers, an increasing
number of applications are coming into existence
where a Vibraswitch will be connected to a computer
or PLC. In these applications the voltage and/or
current may be too low for standard contacts. For
these applications the Model 365A and E365A may be
supplied with an optional sealed switch with gold
contacts.
The Vibraswitch may be used in conjunction with the
Model 563A Monitor This Monitor is designed to “sort-
out” false signals received by the Vibraswitch so that
Alarm and/or Shutdown will not result from false
transient disturbances.
1.2 MODEL IDENTIFICATION
Identify Vibraswitch models in accordance with the
descriptions and variations listed in each table.
365A - A 8 - H
Key Model No.
Table 1 – Switch Contacts
Table 2 – Reset Coil
Table 3 – Special Options
KEY MODEL NO.
Model No. Description
365A Vibraswitch, UL Certified for the U.S.A. &
c-UL Certified for Canada.
E365A Vibraswitch, CE (ATEX) Certified for Europe, UL Certified for the U.S.A. &
c-UL Certified for Canada.
Table 1 – SWITCH CONTACTS
Desig. Description
A SPDT – Single pole, double throw load
contacts.
D DPDT – 2 gang mounted SPDT load
switches.
G DPDT – 2 gang mounted SPDT sealed switches with gold contacts for low
voltage/current applications.
Table 2 – RESET COIL
Desig. Description
0 No reset coil
2 24 volt DC reset coil
3* 240 volt AC reset coil.
4 48 volt DC reset coil
7 117 volt DC reset coil
8 120 volt AC reset coil
* Not Agency Certified. Not available with model E365A.
Table 3 – SPECIAL OPTIONS
Desig. Description
Omit No special options. Enclosure 4 & IP66,
unpainted aluminum.
E Enclosure 4X & IP66, exterior painted with
gray epoxy enamel.
H Space heater installed for maintaining
internal area of enclosure moisture free.
EH
Enclosure 4X & IP66, exterior painted with
gray epoxy enamel, and space heater
installed for maintaining internal area of
enclosure moisture free.

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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Section 2 - SPECIFICATIONS
2.1 ENVIRONMENTAL
Ambient Temperature Limits:
-13°F to +140°F (-25°C to +60°C)
Shock ................................... 40 G @11 ms maximum
Net weight .............................................. 7 lbs (3.2 kg)
Shipping weight .................................... 8 lbs (3.6 kg)
2.2 ELECTRICAL
Contact Arrangement ....................... SPDT or DPDT
Contact Rating:
Designation “A”:
SPDT
7 A max, 460 VAC max, 50/60 Hz, NI;
0.5 A max, 120 VDC max, NI;
1 A max, 48 VDC max, NI;
2 A max, 24 VDC max, NI;
5 A max, 12 VDC max, NI
Designation “D”:
DPDT
5 A max, 240 VAC max, 50/60 Hz, NI;
5 A max, 30 VDC max, NI
Designation “G”:
DPDT – Sealed switch, gold contacts
0.1 A max, 125-250 VAC, NI;
0.1 A max, 30 VDC, NI;
5 mA min at 6 VDC, NI;
2 mA min at 12 VDC, NI;
1 mA min at 24 VDC, NI
Reset Coil Voltages & Power:
24 VDC ±10%, 0.5 amp
48 VDC ±10%, 0.2 amp
117 VDC ±10%, 0.14 amp
120 VAC ±10%, 50/60 Hz, 0.3 amp
240 VAC ±10%, 50/60 Hz, 0.3 amp
Reset Coil Duty Cycle ................. 4 minutes ON max.
10 minutes OFF min.
Space Heater ............................. 2 watt, same voltage
as reset coil
2.3 PERFORMANCE
Set Point Range:
Mounted Horizontal .............. 0 to 4.5 G (peak)
Mounted Vertical ................... 0 to 3.5 G (peak)
Frequency Range .................................... 0 to 300 Hz
(0 to 18,000 RPM)
Set Point Adjustment ..............................1 G per turn
(approximate)
Manual Reset .......................... Included on all models
2.4 ENCLOSURE
Enclosure ................ Aluminum, unpainted (standard)
Aluminum, epoxy painted (optional)
Enclosure seals ............................................ Silicone
Enclosure Hardware ........................... Stainless steel
Enclosure Rating:
Model 365A:
Class I, Div. 1, Group B, C & D;
Class II, Div. 1, Group E, F & G;
Enclosure 4 or 4X:
Class I, Zone 1, AEx d IIB+H T6;
Ex d IIB+H T6; IP66
Model E365A:
Class I, Div. 1, Group B, C & D;
Class II, Div. 1, Group E, F & G;
Enclosure 4 or 4X:
Class I, Zone 1, AEx d IIB+H2 T6;
Ex d IIB+H2 T6; IP66;
ATEX EEx d IIB+H2 T6 IP66
2.5 AGENCY CERTIFICATIONS
UL ................................................. File No. E164999
c-UL .............................................. File No. E164999
CE (ATEX) ......................................... Certificate No.
DEMKO 05 ATEX 0436069
CE PRODUCT CERTIFICATION
Vibraswitch models with CE (ATEX) Approval are
distinguished by the addition of the CE mark on the
nameplate. The nameplate includes additional
information:
Manufacturer’s name and address:
Robertshaw Industrial Products
1602 Mustang Drive
Maryville, TN 37801
The manufacturer’s Model Number:
E365A
Serial number:
Unique serial number assigned by manufacturer
which includes a code for year of construction.
Marking according to Group II: IIB+H
Marking essential for safe use: T6
Enclosure Rating: IP66
Certificate number:
DEMKO 05 ATEX 0436069
Essential information for safe use:
1.The equipment temperature code is T6.
2.The ambient temperature range for the equipment
is -13°F (-25°C) to +140°F (+60°C).
3.The equipment must be bolted closed before
power is applied.
4.All cable entry devices and blanking elements
shall be certified in type of explosion protection
flameproof enclosure “d”, suitable for the
conditions of use and correctly installed.

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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5.Unused apertures shall be closed with suitable
blanking elements.
Section 3 - INSTALLATION
3.1 GENERAL
Examine the Vibraswitch for possible shipping
damages. IMPORTANT: If for any reason it is
determined that the Vibraswitch should be returned to
the factory, please notify the nearest Robertshaw
sales representative prior to shipment. Each
Vibraswitch must be properly packaged to prevent
damage. Robertshaw assumes no responsibility for
equipment damaged in shipment due to improper
packaging.
Choose the location in accordance with good
instrument practice, avoiding extremes of temperature,
humidity and vibration (see SECTION 2 –
SPECIFICATIONS).
The Model 365A and E365A Vibraswitches are
certified for use in hazardous areas as indicated in
SECTION 2 – SPECIFICATIONS. In locations where
moisture condensation within explosion-proof junction
boxes is a problem a two-watt resistor (space heater)
may be placed across terminals 6 and 7 inside the
Vibraswitch cover and wired to provide continuous
heat and circulation of air. (See Table 3-1 for
resistance values.)
3.2 MOUNTING
Figure 3-1 illustrates the methods of mounting on
various pieces of equipment. Figure 3-2 shows the
mounting dimensions and Figures 3-3 and 3-4 show
the external wiring for the Vibraswitch.
The vibration sensitive axis of the Vibraswitch is
perpendicular to its mounting base. Therefore, the
Vibraswitch must be mounted on a plane that will
detect the vibratory motion for which protection is
desired. The Vibraswitch may be mounted at any
location along the length of machines containing
rotating shafts that are horizontal and parallel to the
base of the machine; the preferable location being in
line with the rotating shaft (ref. Figure 3-1). Do not
mount the Vibraswitch perpendicular to the ends of
rotating shafts unless the end play or end-thrust
measurement is desired. Normally, bent shafts worn
bearings and other anomalies are detected near the
bearing housings and at right angles to the shaft.
The Vibraswitch may be mounted in any position
between the side (vertical) or the top (horizontal) of
bearings or machine housings. It should be noted that
when mounting Vibraswitches on top (horizontal
position) of equipment the vibration range is as stated
in the SPECIFICATION SECTION. However, when
the Vibraswitch is mounted on a side position (90°
from the horizontal), 1 g is subtracted from the
measurement range.
If a custom mounting bracket is used to mount the
Vibraswitch due to an irregular mounting surface, it
must be constructed of steel having sufficient
thickness and properly reinforced so that mechanical
resonances are not introduced; usually 1/2" (12.7 mm)
steel plate is satisfactory if the dimensions of the
bracket are minimal (ref. Figure 3-1). It is extremely
important that all four corners of the Vibraswitch, as
well as the mounting bracket, be rigidly secured to the
machine. Exact location is not critical as the
adjustment procedure of the Vibraswitch automatically
accounts for the normal vibration at that location.
The Vibraswitch, when properly adjusted, trips on a
relative increase in vibration.
When installing the Vibraswitch on existing equipment
where several convenient mounting positions are
available, it is advisable to check the existing vibration
level at each possible position before permanently
mounting the Vibraswitch. The Vibraswitch can be
used to measure existing vibration by holding or
clamping it against the running machine and
determining the trip point as described under
“ADJUSTMENT” in this manual. Should normal
vibration exceed the range of the Vibraswitch, it is
recommended that consideration be given to a
Robertshaw Velocity-Acceleration Monitor Model 566.
When mounting on a hot surface, metal spacers may
be placed at all four mounting holes to elevate the
Vibraswitch to allow for additional air flow between the
hot surface and the Vibraswitch. Spacers should be
3/4" (19 mm) diameter minimum and 3/4" (19 mm)
high maximum.
3.3 SPACE HEATER
In some outdoor installations, it may be necessary to
install a space heater (resistor) to prevent moisture
condensation. A small conventional carbon 2 watt
resistor should be installed across terminals 6 and 7 in
the Vibraswitch. Proper resistor values are shown in
Table 3-1.
Table 3-1
Space Heater Resistance Values
VOLTAGE
(AC OR DC) SPACE HEATER RESISTOR (OHMS)
460 0.22 meg
240 56,000
120 12,000
48 2,200
24 620

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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Figure 3-1
Methods of Mounting the Vibraswitch

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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Figure 3-2
Dimensions

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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3.4 WIRING
The Vibraswitch is equipped with a threaded hub for
3/4" conduit. When the vibration amplitude is large
(i.e., greater than 5 mils) it is good practice to use a
short length of flexible conduit to serve as an isolator
between the rigid conduit and the Vibraswitch. Wiring
into the unit should be done with #18 stranded wire,
although #14 can be used where necessary. The
Vibraswitch was not designed for wiring with heavy,
solid wire. However, where necessary to use a
heavier wire, as in low voltage DC applications, a
junction box near the Vibraswitch should be used.
For Vibraswitches with gold plated contacts (Model
365A-G and E365A-G) it is recommended to connect
the two poles in parallel when only one pole is required
(SPST or SPDT operation) as specified in Table 3-2.
Table 3-2
Jumpers for SPST or SPDT Operation
with Gold Contacts
CONNECT TERMINALS
3 to 8 (NO)
4 to 9 (C)
5 to 10 (NC)
NOTE
NOTE
NOTE
NOTE
When wiring the Vibraswitch refer to Figures 3-3, 3-4,
3-5, 3-6 and all instructions associated with those
figures.
Figure 3-3
External Wiring Connections
1. Switch shown in normal (reset) position. Reverses
on actuation from increased vibration.
2. If only a Manual Reset is desired, do not make
connections to terminals 1 and 2.
3. Heater resistor supplied only when specified.
A
ll instrument installation wiring must be done in
accordance with local codes and commonl
y
acce
p
ted
p
ractices.
Conduit runs must have a sealing fitting connected
within 18 inches (46 cm) of the enclosure to preven
t
infiltration of moisture-laden air or corrosive gasses
into the enclosure.
A
ll cable entry devices and blanking elements shall
be certified in type of explosion protection flameproo
f
enclosure “d”, suitable for the conditions of use and
correctly installed.
Unused apertures shall be closed with suitable
blankin
g
elements.

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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365A-A and E365A-A
365A-D, 365A-G, E365A-D and E365A-G
Figure 3-4
Terminal Configurations
PUSH-TO-RESET
BUTTON
SET POINT
A
DJUSTMENT
SCREW
ENCLOSURE
COVER
GND
OPTIONAL SPACE HEATER
NO. 8 TERMINAL SCREW
PUSH-TO-RESET
BUTTON
SET POINT
A
DJUSTMENT
SCREW
ENCLOSURE
COVER
OPTIONAL
SPACE
HEATER
GND
NO. 6 TERMINAL SCREW

MODEL 365A & E365A VIBRASWITCHES 909GF294G
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1-1/2”
(38 MM)
Figure 3-5
Pre
p
aration of Conduit Wirin
g
Figure 3-6
Connection of Conduit Wiring
To avoid unnecessary difficulty in wiring the Vibraswitch, the following procedure should be used:
a. When threading conduit, cut the wires so that all wires project beyond the housing surface approximately 1-1/2”
(38 mm) as shown in Figure 3-5. Do not later pull the wires tight as you will be unable to remove cover holding
the mechanism.
b. Strip wires back 1/4" (6.4 mm) and install solderless terminals.
c. Place the Vibraswitch in position shown in Figure 3-6 and connect wires to corresponding terminals.
d. Flatten wires entering housing against wall on conduit hub side and rotate cover into place, pushing extra wire
into corners near conduit hub.
e. Replace cover bolts, tighten to 75-105 inch lbs (8.5-11.9 Nm).