RKI Instruments 82-5221 User manual

www.rkiinstruments.com
82-5221
115 VAC Solenoid ESTOP
Operator’s Manual
Part Number: 71-0570
Revision: P1
Released: 8/13/21

2 • 82-5221
Product Warranty
RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials,
workmanship, and performance for a period of one year from the date of shipment from RKI
Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at our
option, free of charge. Parts must be returned to RKI Instruments, Inc. for repair or replacement. This
warranty does not apply to those items which by their nature are subject to deterioration or
consumption in normal service, and which must be cleaned, repaired or replaced on a routine basis.
Examples of such items are:
Warranty is voided by abuse including mechanical damage, alteration, rough handling, or repair
procedures not in accordance with instruction manual. This warranty indicates the full extend of our
liability, and we are not responsible for removal or replacement costs, local repair costs, transportation
costs, or contingent expenses incurred without our prior approval.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESSED OR IMPLIED, AND
ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF RKI
INSTRUMENTS, INC. INCLUDING BUT NOT LIMITED TO, THE WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL RKI INSTRUMENTS, INC. BE LIABLE FOR INDIRECT,
INCIDENTAL OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND
CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS
PRODUCTS TO FUNCTION OR OPERATE PROPERLY.
This warranty covers instruments and parts sold to users only by authorized distributors, dealers and
representatives as appointed by RKI Instruments, Inc.
We do not assume indemnification for any accident or damage caused by the operation of this gas
monitor and our warranty is limited to the replacement of parts or our complete goods. Warranty
covers parts and labor performed at RKI Instruments, Inc. only, and does not cover field labor or
shipment of parts back to RKI.
a) Pump diaphragms and valves c) Batteries
b) Fuses d) Filter elements

82-5221 • 3
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
About the 82-5221 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
External Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Internal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Factory Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Replacing the Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4 • 82-5221
Overview
This manual describes the 82-5221 emergency shutoff. It also describes how to install and start up the
device. A spare parts list at the end of this manual lists replacement parts.
About the 82-5221
The 82-5221 is a fixed-mounted device with a relay, stack light, and emergency stop button. It requires
115 VAC to operate. A relay inside the 82-5221 is field-wired into the power line of a user-supplied
solenoid valve. When the emergency stop button on the front of the housing door is pushed, power to
the connected solenoid valve is cut off. A set of remote relay contacts may optionally be used to cut off
power to the connected solenoid.
Specifications
Table 1 lists specifications for the sample drawing gas detector.
WARNING: When using the 82-5221, you must follow the instructions and warnings in this
manual to assure proper and safe operation of the 82-5221 and to minimize the risk of
personal injury.
Table 1: Specifications
Construction (housing) • PBT/PC blend
•NEMA4X
Dimensions 18.77 in. (477 mm) H x 8.09 in. (205 mm) W x 7.19 in. (183 mm) D
Weight 5.1 lbs.
Input Power for Device 115 VAC
Relay Contact Rating
(for solenoid valve
power wiring)
• 15 A at 120 VAC
• 12 A at 28 VDC

82-5221 • 5
Description
External Description
This section describes the external components of the 82-5221.
Figure 1: External Component Location
Housing
The 82-5221’s PBT/PC blend housing is weather- and corrosion-resistant. It is suitable for installation
where general purpose equipment is in use. The housing door is hinged on the left side and is secured
by two latches on the right side. A panel inside the housing allows for component installation and
mounting. Four mounting feet are attached to the back of the housing (one at each corner). The
mounting brackets are used to install the housing to a wall.
One conduit hub on the bottom of the housing is for external wiring connections.
Housing
3/4 NPT Conduit Hub
Stack Light
Emergency Stop Button

6 • 82-5221
Emergency Stop Button
The emergency stop button on the front of the 82-5221 cuts power to the connected solenoid valve
when it is pushed.
Reset a pushed button by turning it clockwise.
Stack Light
The stack light installed on the top of the housing indicates the status of the solenoid valve’s power
line. When the light is green, power is being applied to the solenoid valve. When the light is red, power
is not being applied to the solenoid valve.
Internal Description
This section describes the internal components of the 82-5221.
Figure 2: Internal Component Location
Relay
A DPDT relay installed on the right side of the 82-5221 controls the stack light’s LED color and also
controls the power to the solenoid valve.
Power Supply
An AC/DC power supply installed on the left side of the 82-5221 converts user-supplied 115 VAC to
the 24 VDC that the 82-5221 requires for operation.
SOLENOID
CONT ROL TOALARM CO NTACTS
Mounting Plate
FieldWiring
Terminal Strip
Fuse
1 NC 2
Power Supply
Relay
Emergency Stop
Button Connections

82-5221 • 7
Emergeny Stop Button Connections
The emergency stop button’s wiring connections are visible on the back of the door. They are factory
wired to the power supply and the Field Wiring Terminal Strip.
Fuse
A 250V, 1A slow blow fuse is installed in the power line that runs to the stack light. The fuse holder is
secured to the right side of the housing with a zip tie.
Field Wiring Terminal Strip
The relay and emergency stop button connections are wired to a terminal strip located in the lower
right corner of the 82-5221. The terminal strip makes wiring to the solenoid valve and a remote relay
contact (optional) more accessible.
Installation
This sections describes how to mount and wire the 82-5221.
Mounting
1. Select the mounting site. When you select the mounting site, consider the following factors:
• Is an AC power source available?
• Is a vertical surface available to mount the 82-5221?
• Is there enough room to open the housing door and make wiring connections through the
conduit hub at the bottom of the housing?
• Is the stack light visible?
• Is the location easily accessible in case of an emergency?
2. The 82-5221 is shipped with the mounting feet positioned under the housing. Loosen the screws
that secure the feet to the housing, rotate the feet to their mounting position as shown in Figure 3,
then tighten the screws.
3. Position the 82-5221 on the vertical mounting surface.

8 • 82-5221
4. Insert 3/16 in. screws through the mounting slots to secure the housing to the mounting surface.
Figure 3: Outline & Mounting Dimensions
3/4 NPT Conduit Hub
Ø .23 x .3slot, 4X
8.09
6.04
7.19
11.41
18.77

82-5221 • 9
Factory Wiring
The figure below shows factory wiring connections. These wiring connections should not need
adjustment.
Figure 4: Factory Wiring
4
8NO
NC
Relay
5
1
12 9
Red
Red
C
-
Black
C
+
TOALARM
CONTACTS
Stack Light
Red
Yellow
Green
Not Used
Emergency Stop
Button Contacts Power Supply
Red
NO
NC
Red
1NC 2
Red
Green
Red
Red
Red
SOLENOID
CONTROL
L N -V +V
1314

10 • 82-5221
Field Wiring
This section describes how to wire 115 VAC to the power supply, how to wire a solenoid valve’s power
through the 82-5221, and how to wire a remote relay contact into the 82-5221 (optional).
1. Turn off or unplug power to the 82-5221.
2. Open the housing door.
Power Wiring
3. Guide a 3-conductor cable or 3 wires in conduit through the conduit hub on the bottom of the
housing. Use appropriate conduit fittings and construction technique for the environmental rating
of the housing. The housing is rated NEMA 4X.
4. Connect one end of the three wires to the L, N, and ground terminals on the power supply.
5. Connect the other end of the three wires to the line, neutral, and ground terminals on a 115 VAC
power source (as shown in Figure 5 and Figure 6 below).
Solenoid Wiring
6. Guide a 2-conductor cable or 2 wires in conduit through the conduit hub on the bottom of the
housing. Use appropriate conduit fittings and construction technique for the environmental rating
of the housing. The housing is rated NEMA 4X.
7. Connect one end of the two wires to the “Solenoid Control” terminals on the Field Wiring
Terminal Strip as shown in Figure 5 or Figure 6 below.
8. Connect the other end of the wires to the + or line terminal on a 24 VDC or 115 VAC power source
and to the solenoid valve’s + or line input as shown in Figure 5 or Figure 6 below.
9. For a DC-powered solenoid valve, connect the - terminal on the 24 VDC power source to the
solenoid valve’s - input as shown in Figure 5 below.
10. For an AC-powered solenoid valve, connect the N terminal on the 115 VAC power source to the
solenoid valve’s N input as shown in Figure 6 below.
Remote Relay Contact Wiring
Connecting the 82-5221 to a remote relay contact is is not necessary for operation. Connecting the
82-5221 to a remote relay contact provides another way to cut the power line to the solenoid valve. If
you do connect the 82-5221 to a remote relay contact, the relay contact set used must be normally open
and the relay must be configured as normally energized.
11. Remove the jumper from the Field Wiring Terminal Strip.
NOTE: If you are not connecting a remote relay contact to the 82-5221, the jumper must stay
installed.
12. Guide a 2-conductor cable or 2 wires in conduit through the conduit hub on the bottom of the
82-5221 housing. Use appropriate conduit fittings and construction technique for the
environmental rating of the housing. The housing is rated NEMA 4X.
13. Connect the wires to the “To Alarm Contacts” terminals on the Field Wiring Terminal Strip as
shown in Figure 5 and Figure 6 below.
14. Guide the other end of the wires to the normally open remote relay contact. Use appropriate
conduit fittings and construction technique for the environmental rating of the relay contact’s
housing. RKI’s controllers are rated NEMA 4X.

82-5221 • 11
15. Connect the wires to the NO and C contacts on the relay that you want to use to control the
solenoid valve (as shown in Figure 5 and Figure 6 below). When the relay contact is closed, power
is supplied to the solenoid valve. When the relay contact opens, the power line to the solenoid
valve is cut.
NOTE: The relay that you connect to the 82-5221 must be configured as normally energized.
Figure 5: Field Wiring, DC-Powered Solenoid Valve
L N -V +V
GN
115 VAC
Power Source
SOLENOID
CONTROL
Solenoid Valve
24 VDC
Power
Source _
+
NO
Field
Wiring
Terminal
Strip
NOTE: If remote relay contacts are not
wired to the Field WiringTerminal
Strip, leave the jumper installed.
Power
Supply
Relay Contacts
C
TO ALARM
CONTACTS
L

12 • 82-5221
Figure 6: Field Wiring, AC-Powered Solenoid Valve
16. Close the housing door.
SOLENOID
CONTROL
115 VAC
Power Source
NO
N
115 VAC
Power
Source
L
NG
L N -V +V
C
Relay Contacts
TO ALARM
CONTACTS
L
NOTE: If remoterelay contacts are not
wired to the Field WiringTerminal
Strip, leave thejumper installed.
Solenoid Valve
Power
Supply
Field
Wiring
Terminal
Strip

82-5221 • 13
Start Up
1. Be sure the emergency stop button is not pushed. If it is pushed, turn it clockwise to reset it.
2. Turn on power to the 82-5221, power to the solenoid valve, and power to the device whose relay
contact is wired to the 82-5221 (if used).
3. Power is immediately applied to the solenoid valve and the green LED on the stack light turns on.
Operation
Normal Operation
During normal operation, the stack light is green and power is being applied to the solenoid valve.
Alarms
If the emergency stop button is pushed or if the remote relay contact opens (if used), the stack light
turns red and power stops being applied to the solenoid valve.
Twist the emergency stop button clockwise to reset it and restore power to the solenoid valve. Reset a
remote relay contact alarm as described in the device’s manual.
Replacing the Fuse
1. Turn off or disconnect power to the 82-5221.
2. Open the 82-5221 housing door.
3. Locate the fuse. It is in the power line shown below and is secured to the right side of the housing
with a zip tie.
Figure 7: Fuse Location
4
8NO
NC
Relay
NO
NC
5
1
14
12
13
+
9C
-
Fuse
C
Power Supply
L N -V +V

14 • 82-5221
4. Cut the zip tie to access the fuse holder.
5. Unscrew the two halves of the fuse holder.
6. Remove the old fuse.
7. Install the new fuse.
8. Screw the two halves of the fuse holder back together.
9. Use a new zip tie to connect the fuse holder to the right side of the housing.
10. Close the housing door.
11. Plug in or connect power to the 82-5221.
Parts List
Table 2 lists replacement parts and accessories for the 82-5221.
Table 2: Parts List
Part Number Description
43-4143RK Fuse, 5 mm x 20 mm, 250V, 1A, slow blow
51-0210 Stack light, red/green, steady
71-0570 82-5221 Operator’s Manual (this document)