Mrcool MAC16XA User Manual

The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician.

Please read this manual carefully before installation and keep it for future reference.

Installation Manual

Signature Series

MAC16*A A/C SPLIT SYSTEM

The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician.

Please read this manual carefully before installation and keep it for future reference.

INSTALLATION INSTRUCTIONS

MAC16*A A/C SPLIT SYSTEM

This manual must be left with the homeowner for future reference.

This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.

Table of Contents

Safety Precautions ......................................................2

Installation ...................................................................2

Electrical Connections.................................................4

Start-Up Procedure......................................................5

System Operation........................................................6

Homeowner’s Information ...........................................9

WARNING

result in hazards to you and others. Installation MUST
conform with local building codes and with the National
Electric Code NFPA 70/ANSI C1-1993 or current edition
and Canadian Electrical Code Part 1 CSA .

NOTE

These instructions are intended as a general guide and
do not supersede national, state or local codes in any
way.

These instructions must be left with the property owner.

NOTE TO INSTALLING DEALER

These instructions and warranty are to be given to the
owner or prominently displayed near the indoor air
handler unit.

Manufactured By

MRCOOL, LLC

Hickory, KY 42051

WARNING

Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional installer (or
equivalent), service agency or the gas supplier.

*P507043-04C*

(P) 507043-04C

Save these instructions for future reference

507043-04C Page 1 of 9mrcool.com

These units are designed for use in residential and
commercial type buildings. Units should be installed
with combinations listed in the Air-Conditioning, Heating

5. When passing refrigerant tubes through the wall, seal
opening with RTV or other silicon-based caulk.

6. Avoid direct tubing contact with water pipes, duct work,

Products. Refer to http://www.ahridirectory.org.

Before installation, inspect the unit for shipping damage.
If damage is found, notify the transportation company

WARNING

Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out
and tag switch with a suitable warning label. Electrical
shock can cause personal injury or death.

Safety Precautions

Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations.

thoroughly and follow all warning or cautions attached to
the unit.

1. Always wear proper personal protection equipment.

2. Always disconnect electrical power before removing
panel or servicing equipment.

3. Keep hands and clothing away from moving parts.

4. Handle refrigerant with caution, refer to proper MSDS
from refrigerant supplier.

5. Use care when lifting, avoid contact with sharp edges.

Installation

Unit Location

NOTE: In some cases noise in the living area has been

traced to gas pulsations from improper installation of
equipment.

1. Locate unit away from windows, patios, decks, etc.
where unit operation sounds may disturb customer.

2. Ensure that vapor and liquid tube diameters are
appropriate to capacity of unit.

3.
unecessary turns and bends.

4. Leave some slack between structure and unit to
absorb vibration.

7. Do not suspend refrigerant tubing from joists and
studs with a rigid wire or strap which comes in direct
contact with tubing.

8. Ensure that tubing insulation is pliable and completely
surrounds suction line.

When outdoor unit is connected to factory-approved indoor
unit, outdoor unit contains system refrigerant charge for
operation with indoor unit of the same size when connected

check refrigerant charge using charging information
located on control box cover.

NOTE: Maximum liquid-line size is 3/8 in. O.D. for all
residental applications including long lines.

Outdoor Section

Zoning ordinances may govern the minimum distance the
condensing unit can be installed from the property line.

Install on a Solid, Level Mounting Pad

The outdoor section is to be installed on a solid foundation.
This foundation should extend a minimum of 2” (inches)
beyond the sides of the outdoor section. To reduce the
possibility of noise transmission, the foundation slab
should NOT be in contact with or be an integral part of the
building foundation.

If conditions or local codes require the unit be attached to
pad or mounting frame, tie down bolts should be used and
fastened through knockouts provided in unit base pan.

Rooftop Installations

Mount on level platform or frame 6 inches above roof
surface. Place unit above a load-bearing wall and isolate
unit and tubing set from structure. Arrange supporting
members to adequately support unit and minimize
transmission of vibration to building. Ensure roof structure
and anchoring method is adequate for location. Consult
local codes governing rooftop applications.

NOTE: Unit must be level to within ± 1/4 in./ft per

Clearance Requirements

snow, or ice from roof or eaves cannot fall directly on unit.

Page 2 of 9 507043-04Cmrcool.com

Figure 1. Clearance Requirements

Do Locate the Unit:

• With proper clearances on sides and top of unit (a
minimum of 12” on the three sides, service side should
be 24” and 48” on top

• On solid, level foundation or pad

• To minimize refrigerant line lengths

Do not leave the lines open to the atmosphere for any
period of time, moisture, dirt and bugs may contaminate
the lines.

Filter Drier

and reliability. If the drier is shipped loose, it must be

void, if the drier is not installed.

13/16 SEER

Model

Liquid Line Suction Line

18 3/8 3/4

24 3/8 3/4

30 3/8 3/4

36 3/8 7/8

42 3/8 7/8

48 3/8 7/8

60 3/8 1-1/8

* Fittings should be supplied by the installer.

Do Not Locate the Unit:

• On brick, concrete blocks or unstable surfaces

• Near clothes dryer exhaust vents

• Near sleeping area or near windows

• Under eaves where water, snow or ice can fall directly
on the unit

• With clearance less than 2 ft. from a second uni

• With clearance less than 4 ft. on top of unit

Indoor Coil Piston Selection

The outdoor section must be matched to a factory approved
indoor section. It is mandatory that the installer ensure that
the correct piston or TXV is installed in the indoor section.
If necessary remove the existing piston and replace it with
the correct piston or TXV. See indoor unit instructions
for details of changing the piston or TXV. Contact your
distributor for accessory piston kits.

The correct piston size is shipped with the outdoor unit,

piston that comes with the indoor unit, unless it matches
the one listed on the outdoor unit.

Table 1.

Installation of Line Sets

DO NOT fasten liquid or suction lines in direct contact with

type of hanger. Keep both lines separate, and always
insulate the suction line. Long liquid line runs (30 feet or
more) in an attic will require insulation. Route refrigeration
line sets to minimize length.

DO NOT let refrigerant lines come in direct contact with
foundation. When running refrigerant lines through the
foundation or wall, openings should allow for a sound
and vibration absorbing material to be placed or installed
between tubing and foundation. Any gap between

with a vibration damping material.

Refrigeration Line Sets

Use only refrigeration grade copper tubes. Split systems
may be installed with up to 50 feet of line set (no more than
20 feet vertical) without special consideration. For lines 50
feet or longer, refer to long line set guidelines.

507043-04C Page 3 of 9mrcool.com