Watts 500800 - User Manual

Installation and Operation
Manual
Hot Water Recirculation System
Model 500800
IOM-WQ-500800
Table of Contents Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Before Installation
Contents of Instant Hot Water Recirculating System . . . . . . . . . . 2
Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Operational Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation
Pump Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3/8" Sensor Valve Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1/2" Sensor Valve Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Check Sensor Valve Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Parallel Sensor Valve Installation . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operation
Setting Up The Timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Manual Switch Mode Of Operations . . . . . . . . . . . . . . . . . . . . . . 5
Timer Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Technical and Warranty Information
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
WARNING
!
Read this Manual BEFORE proceeding with
installation.
Failure to read and follow attached instructions or
operating parameters may lead to the product’s
failure and possible damage to property. Refer to
enclosed warranty for operating parameters to
ensure proper use with your water supply.
Keep this Manual for future reference.
Pump and Comfort Valve CS VW
Drinking Water System Components
Maximum use temperature: 140°F
Mfg. by Grundfos Pumps
12" Supply Line and Adapters
MH26400 65GM
ANSI/NSF 61
ANSI/NSF 61
STD. 61
LISTED
This Hot Water Recirculation System does not work with
Tankless water heaters.
For Indoor Use Only.
Please understand this is not an anti-scald device. You
may have some warm water in your cold water line under
the sink where the valve is installed. Once the cold water
line is opened, the warm water will dissipate in a very
short time.
WARNING
!

Summary

Introduction

Electrical Requirements

Operational Parameters

Pump Installation

Sensor Valve Installation

3;8 Stop Valve Installation

Instructions for installing the sensor valve with 3/8" stop valves.

1;2 Stop Valve Installation

Instructions for installing the sensor valve with 1/2" stop valves.

Check Sensor Valve Operation

Procedure to verify the correct functioning of the installed sensor valve.

Optional Parallel Sensor Valve Installation

Guide for installing additional or parallel sensor valves.

Timer Operation

Setting Up The Timer

Steps to configure the timer for pump operation based on usage times.

Manual Switch Modes of Operation

Explanation of the three operational modes for the timer's manual switch.

Timer Programming

Detailed instructions for programming the 24-hour timer's ON/OFF cycles.

Timer Technical Application

Information on the timer's intended use with the recirculation system.

Timer Technical Data

Specifications including voltage, temperature range, and switching intervals.

Troubleshooting

Pump Related Issues

Addresses common issues and solutions related to the pump's functionality.

Timer Related Issues

Troubleshooting common problems associated with the timer settings.

Bypass Related Issues

Solutions for problems concerning the bypass valve and water flow.

Cold Water Supply Issues

Diagnosing and resolving instances of hot water in the cold supply line.

Pump Casing Issues

Addressing potential cracking, corrosion, or leaks on the pump casing.

Limited Warranty

Watts 500800 Specifications