MrCool DIY E Star Series Technisches Handbuch

Easy Do-It-Yourself installation

with our Quick Connect®line set

Installing the MRCOOL DIY® does not require specialized tools or

training. However, it does require basic technical skills. You are assuming

the risk by handling materials containing refrigerants under pressure,

that if not handled properly, can cause bodily injury. If you do not feel

comfortable conducting this installation process yourself, we recom-

mend you retain the services of a qualied HVAC professional.

www.mrcool.com

DIY

E Star™Series

3RD GEN Do-It-Yourself Ductless Mini-Split Heat Pump A/C

SMART CONTROLLER

***************Note****************

This guide is for convenience. Please

refer to the installation manual for

more detailed instructions and

descriptions.

Version Date: 06-08-21

STEP 1 - Inside STEP 3 - Inside

STEP 2 - Inside

1. Drill screw holes at the indicated points into the wall

studs.

2. Remove the mounting bracket from the rear of the

interior air handler by removing the screws holding it in

place.

3. Screw the metal bracket to the wall according to the

template.

4. Use a level to

ensure the

mounting plate is

ﬂush and level.

1. Locate the cardboard wall template.

2. Place the template on the wall at the installation location.

3. Use the template

to mark the location

of the drill points for

the mounting screws

and wall hole. Make

sure that the drill

points for the mounting

screws are located on wall studs.

4. Remove the template.

Wall

Indoor Outdoor

0.2 - 0.3in

(5 - 7 mm)

1. Drill a 3.5 inch diameter hole through the wall, at a

slightly downward angle (to ensure proper drainage), to

accommodate the line set, condensate drain line and

communication cable to the exterior condenser.

2. Carefully bend piping at the back of the air handler until

it is sticking straight out from behind the unit.

3. Using electrical tape, lightly tape the refrigerant piping

& condensate drain line at the back of the indoor unit into

a bundle (this will make it easier to pass through the wall

hole). The drain pipe MUST be on the bottom. DO NOT

wrap the end of the piping (connectors & drain hose)

you will need access to them for later steps.

4. Insert wall hole sleeve into wall hole.

5. Push the wires and piping bundle through the wall hole.

condensate

drain line

Refrigerant

piping

Drain hose

Tape

STEP 3 - Continued

STEP 4 - Outside

STEP 4 - Continued

4. Snap the air handler onto the wall bracket by leaning the

top towards the wall and hooking it on the top of bracket.

Then, apply pressure to the bottom half to snap it to the

bracket.

1. Place outside condenser unit ﬁrmly on the ground or

attach it to a secure metal wall bracket or pad. A drain pipe

underneath the unit is not required unless the unit is

elevated. Please refer to the manual for more information.

2. Install the wall hole ﬁnishing cap/seal. Then, carefully

bend the piping coming out of the wall hole (from the

indoor unit) down towards the wall.

3. Remove the plastic seals from the indoor handler

refrigerant lines.

4. Carefully unroll one end of the Quick Connect® line set.

Only unroll the amount needed to connect to the indoor

handler ﬁttings. Leave the remainder coiled.

5. Align the Quick Connect® refrigerant lines to the

matching indoor handler ﬁttings. Tighten the ﬁrst few

threads by hand.

6. Using two open-ended wrenches, or crescent

(adjustable-type) wrenches, and the image below as a

guide: place the wrenches on points marked “1” & “2,” only

turning the nut at the point marked “2.” Ensure that the

screw connector does not become crooked while working

quickly to tighten it. Tighten the connector until snug.

7. Then, tighten the connector slightly beyond that point to

apply torque to the connector. Repeat the same steps for

the second line. Please refer to the manual for information

about torque requirements for the connectors.

Minimum Clearance between

the back of unit and wall:

**Ground Installed:

12 in (30 cm)

**Bracket Installed:

6 in (15 cm)

Minimum Clearance

in front of unit:

79 in (200 cm)

Minimum Clearance

on the left side of unit:

12 in (30 cm)

Minimum Clearance

above unit:

24 in (60 cm)

Minimum Clearance

on the right side of unit:

24 in (60 cm)

1. Carefully roll the excess tubing and place it behind the

condenser, lying ﬂat on the ground.

2. Align the line set connectors to the outside condenser

and tighten the ﬁrst few threads by hand. NOTE: Make sure

the piping connection to outside unit has plenty of slack

and line set is not stressed.

Carefully unroll to indoor

handler connection

Connect directly to

exterior condensor

Keep excess coiled

Radius

3. Using two open-ended wrenches, or crescent

(adjustable-type) wrenches, and the image below as a

guide: tighten the bottom screw connector. Place wrenches

on points marked “1” & “2,” only turning the nut at the point

marked “2.” Ensure the screw connector does not become

crooked as you work quickly to tighten it. Tighten the

connector until it is

snug.

4. Then, tighten the

connector slightly

beyond that point to

apply torque to the

connector. Please refer

to the manual for

information about

torque requirements.

Repeat the same steps

for the top screw

connector.

1. Starting with the top valve, using an open-ended wrench,

or crescent (adjustable-type) wrench, remove the brass cap

from the valve on the outside unit.

2. Then, insert a 5 mm Allen wrench to open the valve by

turning it counter-clockwise until it stops turning. DO NOT

force it.

NOTE: When opening the valves you may hear a soft

hissing sound as a slight amount of R-410a refrigerant

exits the condenser.

3. Reinstall the cap and tighten securely.

4. Repeat the same steps for the bottom valve.

5. Using soapy water (in a spray bottle or with a brush), or

leak detection spray, apply to the Quick Connect® ﬁttings at

the indoor air handler and outdoor condenser to check for

leaks. If you see bubbles begin to form, this indicates there is

a leak. If so, re-tighten the connection accordingly until the

bubbles are gone. Please refer to the manual for more

detailed information on checking for leaks.

STEP 6 - OutsideSTEP 5 - Outside

STEP 8 - Outside

1. Remove the electrical cover.

2. Wires and terminals that are numbered should be

matched and connected accordingly.

3. If the unit is a 115 volt system (12K), hook to terminals

_L_ and _N_ and Ground.

4. If the unit is a 208/230 volt system (all other sizes), hook

to terminals _L1_ and _L2_ and Ground.

Refer to the diagrams / photo at the bottom left.

WARNING

BEFORE PERFORMING ANY ELECTRICAL WORK, TURN OFF ALL

POWER TO THE SYSTEM.

1. Wire colors of this series / model may diﬀer from previous

models, other series and general conventions.

2. All wiring must be performed in accordance with the

wiring diagrams shown here and all municipal, state and

federal regulations.

4. Be sure to know whether your unit is 115 volt (12K only) or

208/230 volt (all other sizes). Incorrect voltage can cause

serious damage to the system and void the warranty.

5. A certiﬁed electrician is required to supply power from a

disconnect of an appropriate rating - see manual.

STEP 7 - Outside

GREEN Y/G

32 L1L21

21 L1L2

WIRE CONNECTING DIAGRAM

OUTDOOR UNIT TERMINAL

TO INDOOR UNIT 208/230V

POWERSUPPLY

GREEN Y/G

32 L N1

21 L N

OUTDOOR UNIT TERMINAL

TO INDOOR UNIT 115V

POWERSUPPLY

WIRE CONNECTING DIAGRAM 12K

models

only

all

other

models

RED

WHITE

BLACK

RED

WHITE

wrap from

bottom to top

to ensure tape

overlap sheds

rain/water

wrap piping all the way to

exterior wall hole

Quick Connect

connections

keep line excess

bundled and coiled

then wrap together

Wrap the Quick Connect®

connections with the black

sound deadening pads. Then

place insulation over them

before line set is wrapped

Non-Adhesive

U.V. Tape

(Wrap)

Refrigerant

piping

Drain hose

Non-Adhesive U.V.

Tape

1. Install the provided batteries into the remote control.

2. Press the Power button on the remote control.

3. The MRCOOL®DIY®Series should activate automatically.

4. To use the MRCOOL® Smartphone App, refer to the

Smart Controller Module instructions included in the box.

STEP 8 - Continued

STEP 9 - Inside

DIY

E Star™Series

3RD GEN Do-It-Yourself Ductless Mini-Split Heat Pump A/C

1. Pack the wall hole with the supplied Neoprene (or Spray

Foam), ﬁlling any space not taken up by the piping & lines,

in order to seal the hole.

2. To protect Quick Connect® connections and reduce

vibration, wrap them with the black sound deadening

pads. Then, install the white pipe insulation over the pads.

3. Now, starting at the outdoor condenser and working

your way up to the wall hole, you will wrap the exposed

line set, cables, and drain hose together tightly using the

supplied Non-adhesive U.V. tape. The drain pipe will need

to be at the bottom of the bundle. Refer to the diagram on

the previous page. DO NOT wrap the end of the drain

hose.

4. To further improve overall appearance and long-term

durability of the line set, it is recommended to install an

optional MRCOOL®LineGuard® (sold separately).

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