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Pump Mounting: For Indoor Use Only

1.

 Close the supply water valve to the water heater 

located, in most cases, above the water heater on 
the cold water inlet to the hot water heater.

2.

 Drain the water from the hot water pipe by opening 

a hot water faucet in the house. Let the water run 

until it stops flowing. Then drain remaining water 

from hot water heater spigot. Leave the faucet in the 
house open until pump installation is complete. If 

water does not stop flowing, check to make sure the 

water to the hot water heater has been completely 
shut off.

3.

 Disconnect the hot water heater at the hot water

discharge. (see Picture #1)

4.

 Install pump onto the water heater discharge, 

using the 3/4" female fitting and gasket supplied on 

the pump. The pump should be installed so that the 
pump is pumping away from the hot water heater, 

towards the house. Confirm the direction of pumping 

by observing the flow arrow on the side of the pump 

housing. (See Picture #2) Be sure that  the pump is 
not touching the exhaust vent piping (chimney) of a 

gas or oil fired hot water heater. 

5.

 Connect the hot water line to the 3/4" NPT 

discharge of the pump. Use pipe dope or Teflon tape 

to seal threads when connecting to a 3/4 female 

NPT connection. If a  gasketed flexible copper water 

heater connector is used pipe dope or Teflon tape is 

not required.

Water Heater Checklist

    Electric Water Heater

    Turn off Power to your Water Heater. (turn off power at breaker box)

    

Gas Water Heater

    Turn off the Gas to your water heater and insure that the pilot light
    is not burning.

Page 3

PUMP INSTALLATION

Picture 1

disconnect

Picture 2

direction of water

6.

 Reopen the supply valve to the hot water heater and allow the water to run until all 

the air has been purged from the piping.

7.

 Close faucet inside the house.

8.

 Plug the line cord of pump into a 115V outlet. Be sure to route the power cord so 

that it does not touch the exhaust vent piping of a gas or oil fired hot water heater. 

9.

 Using the timer (see pg. 6), set the pump to operate around your peak use times. 

(ie. 30 minutes before the first shower until 15 minutes after last shower).

DO NOT

Mount Motor 

Shaft in Vertical 

Position

Summary of Contents for 500800

Page 1: ...o the product s failure and possible damage to property Refer to enclosed warranty for operating parameters to ensure proper use with your water supply Manual Edition October 18 2007 INSTANT HOT WATER RECIRCULATING SYSTEM Pump and Comfort Valve CS VW MH26400 65GM ANSI NSF 61 DRINKING WATER SYSTEM COMPONENTS MAXIMUM USE TEMPERATURE 140 F Mfg by Grundfos Pumps U P C 12 Supply Line and Adapters ANSI ...

Page 2: ...able of Contents Package Contents Operational Parameters Pump Installation Sensor Valve Installation Sensor Valve Operation Electrical Timer Control Technical Data Timer Operation Warranty 2 2 3 4 5 5 6 7 8 Examine the components carefully to make sure no damage has occurred to the pump Care should be taken to ensure the pump is NOT dropped or mishandled dropping will damage the pump Package Conta...

Page 3: ...p is not touching the exhaust vent piping chimney of a gas or oil fired hot water heater 5 Connect the hot water line to the 3 4 NPT discharge of the pump Use pipe dope or Teflon tape to seal threads when connecting to a 3 4 female NPT connection If a gasketed flexible copper water heater connector is used pipe dope or Teflon tape is not required Water Heater Checklist Electric Water Heater Turn o...

Page 4: ...op valve 3 8 side and the Hot Water In port 1 2 side of the Sensor Valve see Picture 5 Connect the remaining 1 2 x 3 8 flex hose to the cold water stop valve 5 Open both the hot water and cold water stop valves 6 If desired Sensor Valve can be mounted to the wall with the mounting screws 1 2 or Other Stop Valve Installation 1 Close both the hot and cold stop valves below the sink see Picture 3 2 P...

Page 5: ...ing Interval 15 minute increment Switch Modes Timer ON Override OFF Override Protection Clear plastic cover for dust and moisture protection of the clock face Timer Technical Application The timer control is designed only for use with the specified WATTS INSTANT HOT WATER RECIRCULATING SYSTEM Installed indoors on hot water service systems The timer control is designed to turn the circulator on and...

Page 6: ...er on the inner dial Example for 10 30 AM Turn the minute hand clockwise until 10 30 AM is aligned with the triangle on the inner dial The hour and the minute dial will show exactly 10 30 Programming 24 Hour Timer manual switch position The 24 Hour dial has quarter hour division tabs plus AM PM indications Set the required ON OFF times on the programing ring by pushing the tabs away from or toward...

Page 7: ...y This warranty does not cover any equipment that is relocated from the site of its original installation This warranty does not cover any equipment that is installed or used outside the United States of America and Canada LIMITATIONS AND EXCLUSIONS WATTS WILL NOT BE RESPONSIBLE FOR ANY IMPLIED WARRANTIES INCLUDING THOSE OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE WATTS WILL NOT BE RES...

Page 8: ...Phoenix AZ 85027 Fax 623 931 0191 Watts Premier Inc Phone 800 752 5582 www wattspremier com LUPTLW04 10 07 PRINTED IN USA ...

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