Watts SentryPlus Alert, Installation, Operation And Maintenance Manual

5

IOM-UpGradeKit-SentryPlusAlert2

  2013 

EDP# 2916013 

© 2020 Watts

Installation and Operation

For New and Existing LFF113RFP ACV Installations

For convenience, new LFF113RFP ACVs are shipped with a 

Solenoid prewired to the Relay Box. Retrofitting an existing 

LFF113RFP requires an electrician to make that connection 

manually. New and existing ACV systems both require wiring to 

the Relay Box.

For Existing LFF113RFP Installations Only

1.  After removing power from the circuit, disengage the wiring 

from the main terminals inside existing Control Box:

  • Terminals 1 and 2 (Flood Sensor)
  • Terminals 3 and 4 (Solenoid)
  • Terminals 5 and 6 (Remote Trip Indicator, if wired)
2. Remove the Control Box from the ACV or wall mount.
3.  Replace the existing control box and mounting bracket with 

the new Relay box and mounting bracket.

4.  Using the cable from Solenoid, connect the Solenoid to the 

Relay Box. Attach the cable to the terminals 5 and 6 in the 

Relay Box. There is no polarity.

5.  The Relay Box includes several spare terminals for your con-

venience to ease wiring requirements, such as building moni-

toring inputs or valve positioning.

For New and Existing LFF113RFP Installations

1.  Using an electrical cable (not provided), connect terminals 3 

and 4 in the Relay Box to 110VAC power.

2.  Using a 300 V, 14-24 AWG cable (not provided), connect the 

Relay Box to the Control Box. Attach one end of the cable 

to terminals 7 and 8 in the Relay Box. Attach the other end 

of the cable to the terminals labeled ACV in the Control Box. 

Connect Terminal 7 to ACV+. Connect Terminal 8 to ACV-.

Solenoid Operation

The Solenoid is equipped with a Solenoid Bypass Valve (nor-

mally closed) which manually 

closes the Main Valve when 

engaged.
Opening the Solenoid Bypass 

Valve pressurizes the Main 

Valve cover as indicated by a 

pressure gauge, closing the 

Main Valve.
Closing the Solenoid Bypass 

Valve and opening the Manual 

Reset Ball Valve returns the 

Main Valve to the full open 

position.
The pressure gauge returns to 

zero when the Main Valve is 

fully open.

NOTE:

 Manual Reset Ball Valve must be closed for normal oper-

ation.

7, 8

3, 4

5, 6