Grundfos UP15 User Manual

GRUNDFOS INSTRUCTIONS

Comfort System

Hot Water Recirculation System

US Installation and operating instructions

ANSI/NSF61 and

IAPMO listed

Shipment Inspection page 1.
Pre-Installation Checklist page 1.
Pump Mounting page 2.
Electrical page 5.
Timer Control Technical Data and Application page 5.
Timer Operation page 6.
Warranty page 7.

CONGRATULATIONS! You are now the owner of a Grundfos Comfort System. It has
been carefully inspected and tested before shipment. It should give you long, efficient,
trouble-free service. For maximum performance and reliability, please follow the
simple instructions in this manual. NOTE: 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.

Shipment Inspection

Examine the components carefully to make sure no damage has occurred to the
pump during shipment. Care should be taken to ensure the pump is NOT dropped or
mishandled; dropping will damage the pump.
Grundfos Hot Water Package Includes:

• One Grundfos UP15 circulator with timer and linecord

• One Under Sink, Thermal By-Pass Valve

• Two Valve mounting screws

• Installation and Operating Instructions

Items that must be supplied by Installer:

• 2- 1/2” NPT X 3/8” compression flex hoses

• 2- 1/2” NPT X 1/2” NPT flex hoses

• Hand Tools

Pre-Installation Checklist

Before beginning installation procedures, the following checks should be made. They
are all important for proper installation of the circulator pump.

Maximum Water Temperature:

UP15 pump with line cord and timer only; The maximum allowable water temperature
is 150°F.

In a pressurized system, the required inlet pressure is the minimum allowable system
pressure.

page 1

Pump Mounting: For Indoor Use

Picture 1

Note: Do not energize pump
until properly installed

1. Close the supply water valve to the water
heater located, in most cases, above the hot
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 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 ensuring that the pump shaft is horizontal. 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. Be sure that the pump is not touching the exhaust vent
piping (chimney) of a gas or oil fired hot water heater. (See Picture #2)

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

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.

Picture 2

Disconnect

Direction of water

page 2