By Parker Conley • March 2026

Pentair IntelliFlo VS+ SVRS Pump Guide: SVRS Operation, Speed Programming, Alarms, and Troubleshooting

The Pentair IntelliFlo VS+ SVRS is a variable speed pump with a built-in Safety Vacuum Release System (SVRS). It complies with the ASME/ANSI A112.19.17-2002 SVRS standard, which requires the pump to stop within 1 second of detecting a suction blockage. The pump supports up to 8 programmable speeds, communicates with Pentair automation systems via RS-485, and operates from 1100 to 3450 RPM. This guide covers SVRS operation, pump overview, control panel use, speed programming, scheduling, automation integration, alarms, and replacement parts.

Pump Overview

Specification	Value
Input Voltage	230 VAC, 50/60 Hz
Max Input Watts	3,200 W
Speed Range	1100–3450 RPM
Factory Preset Speeds	Speed 1: 1100 RPM \| Speed 2: 1500 RPM \| Speed 3: 2350 RPM \| Speed 4: 3110 RPM
Programmable Speeds	Up to 8
Max Flow Rate	174 GPM
SVRS Suction Threshold	≤25" Hg at pump strainer housing
Circuit Protection	Two-pole, 20A breaker at electrical panel

Electrical Safety: Connect only to a GFCI-protected circuit. Always disconnect power at the circuit breaker before servicing. Never open the drive enclosure — the internal capacitor bank holds a 230 VAC charge even when power is off.

SVRS Disabled During Priming: The SVRS suction blockage protection is NOT active while the pump is in priming mode. Never allow anyone in the pool during pump priming.

SVRS Operation

The SVRS monitors suction vacuum at the pump strainer. When a blockage creates suction above the detection threshold, the pump shuts off within 1 second. This is intended to prevent body entrapment at suction outlets.

System setup requirement: The maximum pump speed must be set so the suction vacuum at the strainer housing connection does not exceed 25" Hg. Install a vacuum gauge at the pump strainer housing port to verify this before putting the system into service.

False SVRS alarms: Air in the circulation system can cause the SVRS to trigger when no actual blockage exists. Always bleed air from the filter when starting the pump. Check for suction-side air leaks if false alarms occur. The Ramp Speed setting (default: 200 RPM) controls how quickly the pump changes speeds — a ramp that is too fast (400 RPM) can trigger false SVRS trips; a ramp that is too slow (5 RPM) causes long speed changes.

SVRS Auto Restart

After a SVRS blockage alarm, the pump restarts automatically after a preset time (default: 2 minutes). The pump ramps slowly from minimum speed. If it detects a blockage again, it shuts down and retries — up to 10 soft-prime attempts before a full prime cycle at which point SVRS detection is temporarily off.

Auto Restart can be disabled if manual restart is required after every blockage event. Check local codes before changing this setting. To configure: Menu → SETTINGS → SVRS.

Pressing the Reset button manually clears a SVRS alarm when Auto Restart is disabled.

Testing the SVRS

Test the SVRS on all new installations using one of two methods:

Fast-closing valve: Quickly close a ball, butterfly, or sliding valve in the suction line in less than 1 second. The pump should shut off immediately.
Test mat: Quickly place a test mat over the suction outlet to simulate an entrapment event. The pump should shut off immediately.

The display will show "SVRS" in the top-left corner when SVRS protection is active.

Control Panel

The LCD displays current speed (RPM), countdown time, wattage, and pump status. Key indicators:

Line 1: Key icon (password active), "SVRS" (SVRS protection enabled), and current time.
Line 2: Current pump speed (RPM).
Line 3: Countdown time and current wattage.
Line 4: Current pump status (e.g., "Running Speed 1," "Running Schedules").

Key control panel buttons:

Speed Buttons 1–4: Select preset speeds (1100, 1500, 2350, 3110 RPM). Press and hold for 3 seconds to save a new speed.
Start/Stop: Start or stop the pump. LED on = pump running or in scheduled mode to start automatically.
Quick Clean: Runs pump at max speed for a preset duration (default: 3450 RPM, 10 minutes).
Time Out: Runs the pump for a preset duration (default: 3 hours), then returns to scheduled operation.
Reset: Clears a resolved alarm.
Enter: Saves settings. Also acknowledges alarms and warnings.

Starting and Stopping the Pump

Confirm the green power LED is on.
Press a Speed button (1–4) to select a preset speed.
Press Start/Stop. The pump ramps to the selected speed.
To stop: press Start/Stop.

To adjust speed while running: press the Up Arrow to increase or Down Arrow to decrease speed. Hold a Speed button for 3 seconds or press Enter to save the new speed.

Programming Speeds (Schedule Mode)

Speeds 1–4 can be set to Manual, Schedule, or Egg Timer mode. Speeds 5–8 can be set to Schedule mode only. The pump can run 8 different speeds at 8 different start/stop times per day.

To set a schedule:

With the pump stopped, press Menu. "Settings" is displayed.
Use the Down arrow to scroll to SPEED 1-8. Press Select.
Scroll to the desired speed number. Press Select.
Press Select again and use arrows to choose Schedule. Press Enter.
Press Down arrow to Set Speed, then Select. Set the RPM and press Enter.
Press Down arrow to Set Start Time. Set time and press Enter.
Press Down arrow to Set Stop Time. Set time and press Enter.
Press Start/Stop (LED on) to activate scheduled mode. The display shows "Running Schedule" when waiting for the next scheduled start.

Constant run: To run 24 hours continuously, set start time 1 minute after the stop time (e.g., start 8:00 AM, stop 7:59 AM).

Priority rule: If two speeds overlap in schedule, the higher RPM speed runs regardless of speed number.

Minimum and Maximum Speed Limits

Minimum speed range: 1100–1700 RPM (default: 1100 RPM). Maximum speed range: 1900–3450 RPM (default: 3450 RPM). The maximum speed must be set low enough that the system suction vacuum never exceeds 25" Hg at the pump strainer. Access via Menu → SETTINGS → Set Min Speed / Set Max Speed.

Automation System Integration (RS-485)

The IntelliFlo VS+ SVRS connects to Pentair automation systems via RS-485 two-wire cable:

EasyTouch / SunTouch / IntelliComm: Controls 4 preset speeds (Ext Control Programs 1–4). Default: 1100, 1500, 2350, 3110 RPM.
IntelliTouch: Can control up to 8 speeds.

Pump address (default: 1) must match the address in the automation system. Up to 16 pumps can be addressed (1–16); IntelliTouch supports up to 4 IntelliFlo VS pumps. Access via Menu → SETTINGS → Pump Address.

Freeze protection and automation: When connected to an automation system, the pump's internal antifreeze protection is disabled. Enable freeze protection through the automation system's circuit function menu instead. To restore internal freeze protection, cycle power to the pump.

Ramp Speed Setting

The Ramp Speed (default: 200 RPM) controls how quickly the pump accelerates when changing speeds. A faster ramp (400 RPM) can cause false SVRS trips. A slower ramp (5 RPM) causes very gradual speed changes. Adjust this setting if SVRS false-trips occur during speed transitions. Access via Menu → SETTINGS → Ramp Speed.

Maintenance

Cleaning the Strainer Basket

Turn off power at the circuit breaker. Relieve system pressure at the filter air relief valve.
Remove the strainer pot lid by turning it counterclockwise.
Remove the basket and rinse with a garden hose.
Inspect the lid O-ring (P/N 350013). Clean or replace as needed.
Reinstall the basket and lid.

Clearing a Clogged Impeller

Disconnect power at the circuit breaker.
Remove the 6 bolts holding the volute to the seal plate. Slide the motor and seal plate away from the volute.
Remove the diffuser and O-ring.
Remove the left-hand thread anti-spin bolt and O-ring (turn clockwise to loosen).
Remove the impeller (P/N 073131), clean, and reinstall.
Reinstall the anti-spin bolt and O-ring, then the diffuser and O-ring.
Slide the motor and seal plate back into the volute. Reinstall and tighten the 6 bolts.

Alerts and Warnings

All alerts appear on the control panel display. Press Enter to acknowledge an alarm. Press Reset to clear a resolved alarm. The pump will not start if the impeller is already rotating.

Alert	Description and Action
Blocked System (SVRS)	Suction blockage detected. Pump shuts off within 1 second. If Auto Restart is enabled, pump restarts after the preset time (default: 2 minutes). If disabled, press Reset, then Start/Stop to restart. Inspect all suction outlets and confirm they are clean and unobstructed before restarting.
Priming Error	Pump did not prime within Max Priming Time. Stops for 10 minutes, then retries. After 5 failed attempts, requires manual reset. Check for air leaks in suction piping, insufficient water, and clogged strainer basket. Adjust priming sensitivity (default: 1%) if pump doesn't exit priming.
Power Out	Supply voltage dropped below 170 VAC. Drive saves current parameters. Allow approximately 20 seconds after power is restored for the drive to restart.
Overheat	Drive temperature too high. Pump gradually reduces speed to cool down. Check ventilation around the drive assembly.
Anti-Freeze	Pump running at preset speed to prevent freezing. Disabled when connected to automation — use automation freeze protection.
Over Current	Drive overloaded or motor problem. Drive restarts 20 seconds after the condition clears. Inspect the impeller for debris.
Over Voltage	Supply voltage too high, or external water is driving the motor. Drive restarts 20 seconds after voltage normalizes.

Troubleshooting

Problem	Possible Cause	Corrective Action
Pump will not prime	Air leak in suction; not enough water; priming sensitivity too low	Check suction piping and valve gland seals. Confirm lid gasket is in place. Check pool water level. Fill the strainer pot with water. Increase priming sensitivity setting (default: 1%).
Reduced flow or head	Clogged impeller; air leak in suction; clogged strainer basket	Clean strainer basket. Inspect suction piping for air. Clear the impeller per the procedure above.
Pump trips and restarts constantly	Air in system; suction vacuum above 25" Hg; blocked suction or discharge; in-floor cleaning system imbalance	Bleed air from filter. Insert a vacuum gauge at the pump strainer — confirm vacuum is ≤25" Hg. Clear any blockages. Reduce max speed. Reduce ramp speed setting. Check in-floor cleaning system for hydraulic imbalance.
Inadequate circulation	Dirty filter or pump basket; speed too slow; piping too small	Clean filter and strainer basket. Increase pump speed. Increase filtration run time. Check piping size.
Pump noisy	Unsupported piping; debris in impeller; cavitation	Mount on concrete (not wood). Clear impeller. Improve suction conditions — increase pipe size, reduce fittings, increase discharge pressure.
False SVRS alarms	Air in circulation system; speed change too rapid	Bleed air from filter when starting pump. Inspect for suction-side air leaks. Reduce Ramp Speed setting below 200 RPM.
Pump does not respond to automation system	Communication cable not connected; pump address mismatch; no circuit name assigned	Confirm RS-485 cable is connected at both ends. Verify pump address matches automation configuration. Confirm the pump is assigned a circuit name in the automation system. Confirm display reads "DISPLAY NOT ACTIVE."
Pump runs but electrical problem appears	Voltage out of range; loose connections; motor overheating	Check voltage at motor terminals while running. If below 90% or above 110% of rated voltage, consult an electrician. Tighten loose connections. Increase ventilation.

Replacement Parts

P/N	Description
350105	VFD Motor (3.2 kW PMSM) — not a serviceable part
351700	IntelliFlo VS Drive — not a serviceable part
350082	Control Cover Assembly — not a serviceable part
073131	Impeller (WFE 12 1000 Series)
072928	Diffuser Assembly (WFE 12)
350201	Seal Plate Kit (Almond)
350015	Volute Casing (Almond)
357151	Lid (see-through)
357199	Clamp, Cam & Ramp (Almond)
350013	O-ring, Lid (CH/WF 2-436)
071444	O-ring 238 (3.484 x 0.139, Buna-N 70)
070387	Strainer Basket (AQ & WF)
350108	IntelliFlo VS Drive Gasket
357100	Gasket, Santoprene Molded
071131	Drain Plug (Almond) — Qty. 2
074629	Gasket, Flat Washer, WFE Drain — Qty. 2
350621	Cover Assembly, IntelliFlo VS FWC (Almond)
355000	SVRS Suction Gauge