Stingl SR-500 Operating and maintenance manual

Instructional Manual
Model SR–500 Rev.1.10
Model SR–500PS Rev. 2.00
(Safety Vacuum Release System)
Version 3.4
Stingl Products
PMB #325, 21010 Southbank Street Sterling, VA 20165
Tel [phone] Fax [phone]
www.stingl-switch.com
U.S. Patent No. 6,059,536/6,342,841

Table of Contents
Section Page
INTRODUCTION.......................................................................2
IMPORTANT INFORMATION.................................................3
INSTALLATION........................................................................ 4
OPERATING INSTRUCTIONS...............................................16
TROUBLESHOOTING
CALIBRATION ISSUES (SR500)........................................23
CALIBRATION ISSUES (SR500PS)....................................34
ERROR CODES....................................................................39
CALIBRATION INSTRUCTIONS SR500.............................27
OPTIONAL EQUIPMENT........................................................43
PARTS LIST..............................................................................43
CONTACT INFORMATION.....................................................44
1

2
INTRODUCTION
Thank you for choosing to install the Stingl-Switch Model SR-500 on your
swimming pool, hot tub, or spa. The enclosed information is designed to give you
years of safe operation of your Stingl-Switch. Please closely review this important
product information.
The Stingl-Switch Model SR-500 works by monitoring the vacuum on the influent
side of the pool or spa pump. Whenever a blockage occurs in the pool drain or
skimmers, the sudden rise in vacuum will cause the Stingl-Switch to immediately
shut down pump operation and activate an audible alarm. The pump will remain off
and the audible alarm will sound until manually reset.
The Stingl-Switch Model SR-500 provides a 30-minute Maintenance/Cleaning
mode to allow pool vacuuming. Normally, the high vacuum generated by pool
vacuuming would cause the Stingl-Switch to sense an entrapment condition and shut
off the pump. However, in the Maintenance/Cleaning mode, the Stingl-Switch is
DEACTIV
ATED and the pump is allowed to run under a high vacuum situation.
WARNING: DURING MAINTENANCE/CLEANING MODE VACUUM IS
NOT MONITORED. A BLOCKAGE WILL GO UNDETECTED DURING
THE 30-MINUTE CYCLE, INCREASING THE RISK OF ENTRAPMENT.
*No bathers should be allowed in pool/spa while Maintenance Mode is in use.
To prevent the system from being left accidentally in Maintenance/Cleaning mode,
the audible alarm will be activated whenever the switch is in this mode. The pool,
hot tub, or spa should not be used or left unattended while servicing or cleaning in
the maintenance mode.
The Stingl-Switch Model SR-500 is designed to be easily retrofitted on all existing
pools, hot tubs, and spas, and is easily installed during new pool and spa
construction.

4
Use ANSI/ASME A112-19.8 approved Drain Covers
To prevent hair entrapment we STRONGLYrecommend that you use
Anti-Entrapment drain covers that meet ANSI/ASME A112-19.8 standards.
Anti-Entrapment drain covers are only effective to a specific flow rate. To be sure
you are not exceeding the flow rate stamped on the cover, please contact your pool
builder or pool service professional.
Pressure
As used in this document, the term “pressure” can refer to positive pressure (above
atmospheric pressure) or negative pressure (vacuum below atmospheric pressure.)
Press a button
As used in this document, the term “press a button” means to momentarily press
then release the button. In cases where a button needs to be held, the instruction
will indicate this directly.
INSTALLATION
SR-500 Specifications
Technical Specifications – SR-500
Response Time: under 3 seconds from event detection
Enclosure: NEMA 3R (Intended for outdoor use. Provides a
degree of protection against falling rain and ice
formation. Meets rod entry, rain, external icing,
and rust-resistance design tests.)
Visual Alarm: Optional
Audible Alarm: 24V AC
Operating Environment: -40 to 140 degrees F (-40 to 60 degrees C),
0-95% RH,
Size: H = 9.0”; W = 5 1/2”; D =4.0”
Packaged Weight: 4 lbs.
Technical Specifications – Remote Alarm
Voltage: 24 V AC
Operating Environment: Suitable for Indoor\Outdoor
Size: H = 9.0”; Dia. = 3.0”
Weight: 1 lbs.
Note: Specifications subject to change without notice.
PROTECT HOSE IN FREEZING CONDITIONS!!!
If the pump is operated in an area where the ambient air temperature can fall below
32˚F, the hose must be protected from freezing by wrapping with heat tape.

5
Pre-Installation Checklist
1. All Ports (drains, skimmers, vacuum lines, etc.) MUST BE FREE OF
DEBRIS PRIOR TO INSTALLATION. Clogged ports will disrupt the
normal vacuum level.
2. Backwash or otherwise clean filter as per manufacturer specification.
3. Clean pump trap basket and skimmer basket(s).
4. Inspect main drain cover. (Also Inspect Spa Drain if present) Drain covers
must be free of obstruction, securely fastened w/ stainless steel screws, and in
sound condition w/ no cracks or breaks.
5. Repair any leaks in circulation system before installation. Leaks will cause
the formation of air bubbles that disrupt the normal vacuum level.
6. Set all valves to normal operating position. Vacuum port valve(s) should be
closed and dedicated vacuum line(s) should be capped in pool. Installations
with pool and spa combinations, with a single pump, we recommend you
consult your pool builder or service professional about closing the spa drain
line during regular filtration.
7. Pump should be run prior to installation and left in fully primed condition.
8. ALL CHECK VALVES MUST BE REMOVED FROM SYSTEM!
Check values can cause a dangerous vacuum condition to remain even after
pump shut off.
Fig.1: System Diagram
BREAKER
PA N E L
OR
PUMP
CONTROLLER
SR-500
VACUUM HOSE
DRAIN PLUG
TO WATER JETS
CONDUIT
PUMP
MOTOR
LINT
TRAP
TO MAIN DRAIN
❑
❑
❑
❑
❑
❑
❑
❑

6
Switch Installation
Mounting
1. Mount the SR-500 in a suitable location within 8 feet of the pump.
2. Before mounting, remove SR-500 from its plastic enclosure by depressing tab
in upper left and pulling top portion of SR-500. Slide SR-500 out from the top.
At this point, record the serial number of your SR-500 on the warranty card.
3. Mount plastic enclosure using screws & anchors provided.
4. Install the hose fitting provided in the 1/2” inner knockout below the vacuum
sensor. (Refer to Fig.2)
5. Re-install SR-500 into plastic enclosure. Slide the bottom of SR-500 into box;
then press upper portion until SR-500 snaps into place.
6. NOTE: Top portion of hose must be mounted onto vacuum sensor prior to
connecting lower end to pump trap. DO NOT connect the hose to the pump
until after successfully zeroing the sensor in service mode. The sensor must
be open to atmosphere to zero properly.
7. Feed the vacuum hose through the hose fitting and connect to the vacuum
sensor. Insure hose is snug onto vacuum sensor. Tighten the hose fitting
securely to provide strain relief for the hose. Attach hose clamp (included) for
additional strain relief (Refer to Fig.2.A). The vacuum hose MUST exit the box
straight down without bends or kinks.
8. When routing the hose take care to avoid high-traffic areas where the hose can
be stepped on or tripped over. Zip-tying the hose to the pump electric conduit is
a good option. Excess hose can be trimmed, but under no circumstances shall
the existing hose be lengthened or a longer hose be used. Protect hose in
freezing conditions by wrapping with heat tape. If the pump is operated in an
area where the ambient air temperature can fall below 32˚F, the hose must be
protected from freezing by wrapping with heat tape.
9. Remove drain plug from pump trap. Install in its place the flare adapter, using
Teflon tape (not included) to ensure a good seal.
10. Attach the free end of the hose to the flare adapter and tighten.
11. If no pump drain plug exists, plumb in a tee with a 1/4” FPT reducer bushing.
REMOVE
INNER
KNOCKOUT
Fig. 2.A: Hose Clamp
Fig. 2: 1/2” Knockout

7
Wiring the SR500/SR500PS
NOTE: THE STINGL-SWITCH CANNOT BE USED/RELIED ON AS AN ELEC-
TRICAL DISCONNECT MEANS. A SEPARATE DISCONNECT MEANS MUST
BE PROVIDED. A CERTIFIED ELECTRICIAN IN ACCORDANCE WITH THE
NATIONAL ELECTRICAL CODE MUST COMPLETE ALL ELECTRICAL
WORK.
The voltage selector switch on the right side of the metal case MUST BE SET to match the
incoming power. Damages to the unit due to improper power input WILL NOT be covered
by warranty. The unit is set to 230 volts at the factory, this will also be the correct setting
for 208 volt applications. For 110/115/120 volt pumps, set the selector switch to 115v.
Line Voltage Option 1
High Voltage 120/240V Single Phase 3 HP Pumps (20AMP) or less
(See Fig. 3 for terminal locations)
1. Determine the operating input voltage of the pump, 120V or 240V. Set the red
input switch (located on the right side of SR-500) accordingly.
2. Wire incoming voltage to line terminals (#10 & #12)
3. Wire pump to load terminals (#9 & #11)
4. Connect line & load grounds to the green ground pigtail with wire nut.
5. For this scenario see Drawing 1 or 2
Line Voltage Option 2
High Voltage 240/480/600 Triple Phase 3.5 HP pumps (20AMPS) or greater.
1. Set the red input switch (located on the right side of SR-500) to 115V
2. For this scenario see Drawing 3
Low Voltage (See Fig. 3 for terminal locations)
1. Heater delay circuit (fireman’s switch) – connect heater delay circuit to contacts
(#3 & #4) on
terminal strip. NOTE: Heater delay must be enabled in set up menu – see
operating instructions
2. Remote powered alarms can be connected to terminals (#5 & #6), or the SR-
500 can power 24V alarms by jumping terminals (#6 & #7), and wiring alarm
to terminals (#5 & #8).
3. Remote interfaces such as Jandy®or ComPool®, pneumatic or solid-state
controls and external timer systems are connected to terminals (#1 & #2).
NOTE: The remote mode must be enabled in the on/start menu for remote
interfaces to operate properly.
Fig. 3: Terminal Diagram

8

9

10

11

12

13

14

15

OPERATING INSTRUCTIONS
Front Panel
The SR-500 front panel features a two-line by 16-character backlit liquid crystal
display and six momentary pushbutton switches implemented in a membrane label.
Switches
OFF/STOP – Immediately stops pump operation. Also silences any active alarms.
ON/RUN – Toggles between timed, continuous run, and remote modes.
MAINT/CLEAN – Initiate Maintenance/Cleaning mode, where the pump will
operate continuously for 30 minutes.
WARNING: DURING MAINTENANCE/CLEANING MODE VACUUM IS
NOT MONITORED. A BLOCKAGE WILL GO UNDETECTED DURING
THE 30-MINUTE CYCLE, INCREASING THE RISK OF ENTRAPMENT.
SET – Used to initiate set-up modes for time, date, and pump operating schedule.
+/YES and -/NO – Used to answer yes/no questions, and increment or decrement
the value of a displayed selection, (i.e. date and time).
Fig. 5: Membrane Switch
16

Getting Started
IMPORTANT! Before AC power is applied to the SR-500, the plumbing
connection must be made properly. At the time of installation, or whenever the
plumbing has been reconfigured or changed in any way, the unit will need to perform
vacuum level measurements. At these times, the pool system must be as “perfect”
as it can be – drains unclogged, skimmers cleaned, etc., since the system will use
these vacuum measurements as a reference for all subsequent operation. After the
plumbing is complete and everything checks out “OK”, it’s time to apply power.
NOTE: Before applying power, make sure that voltage selector switch is set to
the correct AC line voltage – 115VAC or 230VAC.
When power is applied, the unit will perform a quick self-check and verify the
stability of the AC line. The unit will check the reference pressure values that were
set at the time of installation; if these values are not set, the unit will display the
error message “SET-UP REQUIRED.” Pressing and holding the SET button will put
the unit into the SERVICE MODE, intended for
use by service technicians only. Pressing any
other button will have no effect.
Once the clock is set and the pump is primed, the unit is ready for normal operation.
NOTE: The unit must be properly set-up in order to function: failing to
successfully perform the PRIME PUMP function will prevent the unit from
operating. Until the PRIME PUMP function is executed, you will continue to
see the ‘SET-UP REQUIRED’ message when you attempt to exit the SERVICE
MODE. No other operating modes may be selected.
SET-UP REQUIRED!
REFER TO MANUAL
17

Wiring
NOTE – THE SR500 CANNOT BE USED/RELIED UPON AS A SERVICE DISS-
CONNECT MEANS. A SEPARATE DISCONNECT MEANS (SUCH AS A CIR-
CUIT BREAKER) MUST BE PROVIDED. A CERTIFIED ELECTRICIAN IN
ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE MUST COM-
PLETE ALL ELECTRICAL WORK.
Power Terminals are on the bottom right of the unit, and are labeled Line 1, Line 2,
(incoming voltage) and Load 1, Load 2 (power output to pump or contactor)
BEFORE TURNING ON THE POWER TO THE UNIT, VERIFY YOUR PUMP
OPERATING VOLTAGE (120 OR 240 VOLTS) AND SET THE VOLTAGE
SELECTOR SWITCH ON THE RIGHT SIDE OF THE SR500 ACCORDINGLY.
UNITS DAMAGED BY IMPROPER POWER INPUT WILL NOT BE COVERED
BY WARRANTY!
For Single Phase pumps, 120 or 240 volts, up to 3 Hp or 20 amps.
1. Wire incoming voltage to Line 1 and Line 2. (#10 and # 12) 120 VOLT INSTAL-
LATIONS – THE NEUTRAL BUSS MUST BE GROUNDED TO THE
GROUND BUSS IN THE SUPPLY PANEL.
2. Wire pump leads to Load 1 and Load 2. (#9 and #11) 120 VOLT INSTALLATIONS
MUST USE BOTH LOADS CONNECTED TO BOTH TERMINALS OF THE
MOTOR.
3. Connect panel and motor grounds to the green ground pigtail with a wire nut.
Refer to Drawing 1 or 2
18

For pumps over 3 Hp/20 amps, or for 3 phase pumps
1. Pump voltage must be carried by an external contactor rated for the pump load. Coil
voltage can be either 120 or 240 volts, however, the coil voltage must match the out-
put voltage of the SR500. 120 VOLT INSTALLATIONS – THE NEUTRAL BUSS
MUST BE GROUNDED TO THE GROUND BUSS IN THE SUPPLY PANEL.
2. Wire the SR500 to a dedicated circuit, 120 or 240 volts, power input to Line 1
and Line 2 (#10 and # 12) and power out to coil from Load 1 and Load 2 (#9 and
#11) 120 VOLT INSTALLATIONS MUST USE BOTH LOADS CONNECTED
TO BOTH TERMINALS OF THE COIL.
Refer to Drawing 3
Low or No voltage terminals.
1. Remote SW input (#1 and #2) are dry contacts for remotely controlling the startup of
the SR500 in Remote Mode, such as when used with a remote control system (Jandy
or ComPool) Open = pump off, Closed = pump on
2. Heater Delay circuit – (#5 and #6) or Fireman’s switch. Wire to the delay or safety
circuit of your heater to shut it down 15 minutes before the pump. HEATER DELAY
MUST BE ENABLED IN SERVICE MODE DURING CALIBRATION.
3. Alarm – dry contact that closes while the SR500 is in an alarm state or in maintenance
mode. Use in conjunction with the 24 volt output for remote alarms.
4. 24 volt alarm output (#7 and #8) provides a 24 volt output. Use to power 24 volt
remote alarms.
Getting Started
BEFORE TURNING ON THE POWER TO THE UNIT, VERIFY YOUR PUMP OPER-
ATING VOLTAGE (120 OR 240 VOLTS) AND SET THE VOLTAGE SELECTOR
SWITCH ON THE RIGHT SIDE OF THE SR500 ACCORDINGLY. UNITS DAM-
AGED BY IMPROPER POWER INPUT WILL NOT BE COVERED BY WARRANTY!
1. When the power is applied, the SR500 will perform a self-check and verify the
stability of the AC input. If incoming voltage is correct and the SR500 is being powered
up for the first time and has no reference values in it’s memory, you will see the
following message: SET UP REQUIRED
REFER TO MANUAL!
19