Grundfos MixiMizer Betriebsanleitung

Grundfos MixiMizer™

Installation and Operation

Settings

Sensor

Installation

Pump

Installation

General

MixiMizer

Features

Shipment

Inspection

Start Up

Error Messages

& Trouble Shooting

MixiMizer

Technical Data

GRUNDFOS INSTRUCTIONS

Pumps Incorporating the

(MR) Mixing Reset Control

with Date Code 0718 or higher

Page 1

MixiMizer™

The hot water heating system can now be accurately

and comfortably controlled by modulating the hot water

supply. As the outdoor temperature changes, the

MixiMizer will automatically calculate the pump speed

required, to ensure proper water temperature for your

heating system.

For maximum performance and proper installation,

please follow the simple instructions in this manual.

1. Shipment Inspection

Check the contents of this package. Care should be

taken to ensure the pump is NOT dropped or mishan-

dled; dropping will damage the pump.

Grundfos MixiMizer Injection Pump Package Includes:

• One Grundfos UP15-42 MixiMizer pump with

integral control.

• Two Water Temperature Sensors (Supply & Re-

turn) – Pre-wired into control box with 8’ of wire.

• One 6’ line cord with 115 V plug, pre-wired into

control box.

• One Outdoor Air Temperature Sensor (OATS)

• Two ﬂange gaskets

• Installation and Operating Instructions.

• Four sensor (Supply & Return) cable ties.

When installing and using this electrical equipment, basic

safety precautions and local code requirements should

always be followed, including the following:

CAUTION: The installer must ensure that

this control and its wiring are isolated

and/or shielded from strong sources of

electromagnetic noise. Conversely, this

Class B digital apparatus complies with

Part 15 of the FCC Rules and meets all requirements

of the Canadian Interference-Causing Equipment

Regulations. However, if this control does cause harm-

ful interference to radio or television reception, which

can be determined by turning the control off and on, the

user is encouraged to try to correct the interference by

reorienting or relocating the receiving antenna, relocat-

ing the receiver with respect to this control, and/or

connecting the control to a different circuit from that to

which the receiver is connected.

CAUTION: The non-metallic Outdoor Air Temperature

Sensor (OATS) and Pump Control Box enclosures do

not provide grounding between conduit connections.

Use grounding type bushings and jumper wires.

CAUTION: Improper installation and operation of this

control could result in damage to the equipment and

possibly even personal injury. It is your responsibility

to ensure that this control is safely installed according

to all applicable codes and standards. This electronic

control is not intended for use as a primary limit control.

Other controls that are intended and certiﬁed as safety

limits must be placed into the control circuit.

WARNING: All ﬁeld wiring to be low voltage. Power

for control is provided through the power cord supply-

ing power to the pump. Use copper conductors only.

Disconnect all power sources prior to servicing.

Risk of electric shock: This pump is supplied with

a grounding conductor and grounding-type attach-

ment plug. To reduce the risk of electric shock, be

certain that it is connected only to a properly grounded,

grounding type receptacle.

Page 2

Page 3

2. General MixiMizer Features

• All minimum and maximum settings are operating,

not safety limits. Necessary auxiliary equipment

and safety devices must be added.

• The boiler return minimum temperature is ﬁxed

at 135°F. This function can be disabled by a DIP

switch.

• The system supply maximum temperature is ﬁxed

at 140°F. This function can be disabled by a DIP

switch.

• Heating curve parallel shift: The heating curve can

be shifted 5°F parallel to the default curve. This

function can be enabled by the DIP switch.

• Pump Exercising: After every three days of no

operation, the control will exercise the pump for 10

seconds. The % of Pump Performance LED will

be on during exercising.

• Post Purge: A 20 second post purge is available

once the heat demand is removed or control

enters WWSD. The purging holds the last speed

used.

• As variable speed output modulates, the control

ﬂashes the % of Pump Performance LED on for ¼

second and off for ¼ to 2 1/2 seconds.

• A 2 second delay from demand to actually starting

the pump is used to prevent issues with a noisy

demand relay signal.

• Optional Boiler On/Off Output: is activated

when the pump speed is raised to the boiler

enable percentage (30% pump speed) and is de-

activated when the pump speed falls to 50% of the

boiler enable percentage (15% pump speed). The

boiler enable relay has a minimum activation time

of 3 minutes and a minimum de-activation time of

20 seconds.

Page 4

• Optional Zone Control Input: The unit can

accept external “Call For Heat” input signal. This

must be a powered signal (20 to 30 V AC .1 VA).

This function can be enabled by a DIP switch.

• Warm Weather Shut Down (WWSD): When the

outdoor air temperature is warmer than 70°F (with

±1°F hysteresis), the unit shuts down until the

temperature drops below 70°F.

Summer Service Instructions

When the outdoor temperature is greater than 70oF and

the warm weather shutdown (WWSD) feature is active,

the pump will normally not be in operation. To allow the

pump to be tested, disconnect one of the wires from

the air temperature sensor in the control box. This will

simulate an open circuit in the outdoor sensor and the

control assumes an outdoor temperature of 30oF. This

will allow the pump to operate for testing and/or service.

Remember to re-connect the outdoor temperature sensor

wire when ﬁnished.

3. Pump Installation

Warning: Consult piping manufactures

for material selection before installing

this pump. Absence of pumping ﬂuid

may damage some piping materials.

Caution: Thoroughly clean and ﬂush the system prior

to pump installation

Pump: For Indoor Use Only

Variable speed injection systems require complete

isolation between the boiler loop and system loop.

For example, when the injection pump is turned off,

there must be no heat transfer from the boiler loop to

the system loop. In order to avoid this unwanted heat

transfer, review standard primary-secondary piping

techniques described below. See ﬁgure 1.

Page 5

Note 1: The injection piping (Supply and Return) must

be at least one pipe diameter smaller than the piping of

the boiler and system loops.

Note 2: There must be a maximum of 4 pipe

diameters between the tees in the boiler and system

loops in order to prevent ghosts ﬂow when the variable

speed injection pump is off and either the boiler pump

or system pump is on.

Note 3: There must be at least 6 pipe diameters

of straight pipe on either side of the tees in order to

prevent momentum of water in the boiler and system

loops from pushing ﬂow through the injection loop.

Note 4: To prevent convective heat transfer through

the injection loop, there should be a minimum of 1 foot

drop to create a thermal trap.

System

Loop

Grundfos

Note 3

Note 4

MixiMizer Pump

Boiler

Loop

Balancing

Valve

{

Note 1

{

Note 3

{

Note 2

{

Figure 1 - Injection loop without thermal trap.

Page 6

Design Injection Nominal Injection MixiMizer

Flow Rate (GPM) Pipe Diameter Pump Model

0-8 3/4" UP15-42BUC5/MR

UP15-42BUC7/MR*

Warning:

*Can produce flow velocity

greater than 8 ft/sec in this size.

0-5 1/2" UP15-42BUC5/MR*

UP15-42FC/MR*

UP15-42FC/MR

0-16 1" UP15-42BUC7/MR

Arrows on the side or bottom of the pump chamber

indicate direction of ﬂow through the pump. Grundfos

Miximizer pumps can be installed in both vertical and

horizontal lines. Flow direction should be from the boiler

loop into the system loop.

The pump must be installed with the motor shaft posi-

tioned horizontally. Under no circumstances should the

pump be installed with the shaft vertical or where the

shaft falls below the horizontal plane (Fig.2).

Table 1

Recommended

Optional

DO NOT

Mount Motor Shaft

in Vertical Position

Figure 2

Preferred installation of the pump will have the terminal

box located to one side of the pump or the other, with

the conduit entry down.

Page 6

Page 7

Sensor Installation

Warning: All electrical work should be

performed by a qualiﬁed electrician in

accordance with the latest edition of the

National Electrical Code, local codes and

regulations.

CAUTION: Power must not be applied to any of the

wires during the rough-in wiring stage.

CAUTION: All ﬁeld wiring must pass through a suitable

listed conduit ﬁtting, to ensure proper strain relief.

CAUTION: All ﬁeld installed wiring should meet or

exceed requirements for class 2 wiring per article 725

of the National Electrical Code rated at 30VAC 250VA.

Ensure that enough wiring is in the control box to

reach the terminal strip.

NOTE: All ﬁeld wiring shall have insulation stripped

exposing 6.0mm of conductor before placement into

control box terminal strip.

If the terminal box position needs to be changed, ensure

that the electrical supply is turned off and close the

isolation valves before removing the Allen screws.

To change control box position:

• Remove the four (4) Allen screws (4 or 5mm

wrench) while supporting the stator (motor).

• Carefully separate the stator from the pump

chamber and rotate it to the correct terminal box

orientation.

• Replace the Allen screws and tighten diagonally

and evenly (7 ft. –lb. torque).

• Check that the motor shaft turns freely. Remove

the large screw in the middle of the nameplate,

insert a small ﬂat blade screwdriver into the end of

the shaft, and turn gently.

• If the shaft does not turn easily, repeat the disas-

sembly/reassembly process.

Outdoor Air Temperature Sensor (OATS):

The Outdoor Air Temperature Sensor includes a built

in 10 kW (ohm) thermistor which provides an accurate

measurement of the outdoor temperature. The OATS

sensor is protected by a white U.V. resistant PVC plastic

enclosure (Fig. 3A & 3B).

• Remove the screw and pull the front cover off the

sensor enclosure.

• The OATS can either be mounted directly onto a

wall or in a 2” x 4” electrical box. When the OATS

is wall mounted, the wiring should enter through

the back or bottom of the enclosure. Do not

mount the OATS with the conduit knockout fac-

ing upwards as rain could enter the enclosure

and damage the sensor (Fig. 4).

• In order to prevent heat transmitted through the

wall from affecting the sensor reading, it may be

necessary to install an insulating barrier behind

the OATS enclosure.

• The OATS should be mounted on a wall which

best represents the heat load on the building (a

northern wall for most buildings or a southern fac-

ing wall for buildings with large south facing glass

areas). The OATS should not be exposed to heat

sources such as ventilation or window openings.

Page 8

Figure 3A - Closed

Outdoor Air Temperature

Sensor (OATS)

Sensor

Figure 3B - Open Outdoor

Air Temperature Sensor

(OATS)

• The OATS should be installed at an elevation

above the ground that will prevent accidental dam-

age or tampering.

• Install ﬁeld wiring from the OATS mounting loca-

tion to the control box for the control wiring. Do

not run ﬁeld wires parallel to telephone or power

cables. If the sensor wires are located in an area

with strong sources of electromagnetic interfer-

ence (EMI), shielded cable or twisted pair should

be used. If using shielded cable, the shield wire

should be connected to the Com (–) terminal on

the control and not to earth ground.

• Connect the two ﬁeld wires from the OATS directly

to the control box “Com (-)” and “Os/V” (not polar

sensitive) terminals (Fig. 8).

Water Temperature Sensors (Supply & Return):

The Water Temperature

Sensor has a zinc sleeve

for fast response and a

wide operating range (Fig

5). Factory Pre-wired

Note: Sensors are designed to mount on a pipe or in a

temperature immersion well.

• The sensor can be strapped

directly to the pipe using the

cable tie provided. Insulation

should be placed around the

sensor to reduce the effect

of air currents on the sensor

measurement (Fig. 6).

Page 9

Figure 5 - Sensor

Sensor with rear

entry wiring

Sensor with bottom

entry wiring

Sensor mounted

onto 2" x 4" electrical

box.

Figure 4 - Mounting the Outdoor Air Temperature Sensor (OATS)

Figure 6 - Mounted Sensor

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