Connect Line Set To Indoor Unit - MrCool DIY E Star Series Installation & Owner's Manual

Step 3: Connect Line Set to Indoor Unit
3.1 Tools needed
NOTE: Depending on the capacity rating of your unit,
(12K, 18K, 24K, 36K) the wrench sizes needed will vary, refer
to the table below (the unit uses metric sizes, the standard
sizes listed are approximations). Based on the availability of
wrenches in some of the sizes needed, the recommended
method is to use crescent (adjustable-type) wrenches that
can be adjusted to fit the size each step requires.
.
Opened-ended wrench sizes needed
(1x of each of these)
12K & 18K 24K & 36K
3/4" / 19 mm 3/4" / 19 mm
7/8" / 22 mm 15/16" / 24 mm
15/16" / 24 mm
1" / 26 mm 1-1/8" / 29 mm
1-1/4" / 31 mm
.
1x HVAC Torque Wrench (if available)
.
1x Allen key, 5 mm
.
1x Phillips-head screwdriver
.
1x leak-detection spray or a soapy water solution
(liquid detergent/mix, applied by brush or spray bottle)
3.2 IMPORTANT INFORMATION
PLEASE READ FULLY BEFORE PROCEEDING TO NEXT STEP
DO NOT
Always wear work gloves and goggles and use caution
when handling refrigerant. Please make sure that
refrigerant is never allowed to enter the environment.
Improper handling of refrigerant may be harmful to
your health.
DO NOT
•
The screw connections may only be tightened using
the appropriate open-ended or crescent (adjust-
able-type) wrench.
Refrigerant Piping Connection
}
Or 2x Crescent
(adjustable-type)
1" / 26 mm
Wrenches
about connecting the refrigerant line connectors
IMPORTANT:
The line sets are designed to only be installed once.
The seal within the line set cannot be guaranteed if
they are installed more than once. This will void the
warranty. They also contain a compression fitting
to seal and do not require a thread sealent (teflon
tape, etc.). Using a sealent may actually cause the
connection to leak over time.
3.3 Connecting the Quick Connect® Line Set
to the piping from indoor unit
1.
Do not remove the plastic seals of the piping coming
from the indoor unit, or the appropriate line set
connector, until immediately before you connect
them. The plastic seals on each of the connectors
should be color-coded to match the seals of the
corresponding pipes they are to be connected to.
2.
Align the refrigerant pipes correctly, making sure
the dimensions of the connecting refrigerant pipe
match. Unscrew the seals and place the screw
connector of the line set pipe just onto the
threads of the piping from the indoor unit, and
tighten the first few threads by hand.
IMPORTANT:
Before you continue, it is essential that you read
the following instructions fully and carefully.
mrcool.com
Page 24