McQuay M5WM Series Manual

M5WM Wall Mounted Split Type Air Conditioner (SEER 13)
Indoor Unit
Outdoor Unit
Installation and Maintenance Manual IM-5WMF
(
SEER13
)
-0706-McQua
y
Group: Wall Mounted
Part Number: R08019028218
Date: July 2006
Wireless Remote
Control (Standard)
Wired Wall Control
(Optional)

Table of Contents
General Information……………………………………………….. 3
Safety Precautions………………………………………. 3
Unit Dimensions…………………………………………….……... 4
Indoor Units …………………………………….……....4
Outdoor Units …………………………….…….. ……....4
Installation Guidelines……………………………………………...7
Installation Diagram……………………………………...7
Installation of Outdoor Unit……………………………...7
Condensed Water Disposal of Outdoor Unit…….……....7
Outdoor Unit Clearances……………………………7
Installation of the Indoor Unit……………………………7
Indoor Unit Clearances …………………………….8
Piping …………………….......................................8
Mounting Plate Installation ………………..………8
Installing Unit on Mounting Plate ………….………9
Drain Hose Installation ................................ ………9
Refrigerant Tubing………………………………………………….10
Tubing Length & Elevation………………………………10
Tubing Preparation……………………………………….10
Tubing Connection To Units …………..………. ………10
Electrical Connections …………………………..………...………11
Cooling Unit ………………………...…………. ………11
Heat Pump Unit ………………………............... ………11
Wiring Diagrams ………………………………..................………12
Vacuuming and Charging…………………………………………..18
Purging the Piping and the Indoor Unit………………….18
Additional Charge………………………………………..18
Charge Operation………………………………………...18
Special Precaution When Dealing with R410A unit……. 19
Model Numbers
Cooling Only
Indoor Unit Outdoor Unit Nominal Cooling – BTUH
M5WM10F M5LC10C 9000
M5WM15F M5LC15C 12,000
M5WM20F M5LC20C 17,500
M5WM25F M5LC25C 23,000
Cooling/Heat Pump
Indoor Unit Outdoor Unit Nominal Cooling - BTUH Nominal Heating - BTUH
M5WM10FR M5LC10CR 9000 8800
M5WM15FR M5LC15CR 12,000 12,000
M5WM20FR M5LC20CR 17,500 18,000
M5WM25FR M5LC25CR 23,000 23,500
Page 2 IM-5WMF(SEER13)-0706
Unit Indicator Lights ……………………………................19
IR Signal Receiver ………………...……………19
Cooling Only Unit ……………………............... 19
Heat Pump Unit ………………………............... 20
Special Features …………………………………..…..........21
Dry Mode ……………………………..…...........21
Heat Mode (Heat Pump Only) ………..………...21
Air Flow Control ………………………..………21
Hot Keep (for Heat Pump Only) ………..………21
Overheating Protection (Heat Pump Only) ……...21
Frost Prevention ………………………………...21
Fan Speed and Rated Cooling Capacity ……….. 21
Main Filters ……..………………………............21
Cooling ……………..………………………….. 21
Electrostatic Air Purifying Filter …………......... 21
Deodorizing Filter ………………………..……..21
Filter Replacement ……………………………...21
Auto Random Re-start Function ………………..22
Low Ambient Kit ……………………………….22
Minimum and Maximum Operating Temperature….. 22
Remote Controller Operation Guide ………………………23
Service and Maintenance ………………………………….25
Maintenance Schedule ………………………….25
Troubleshooting ………………………………...25

General Information
IM-5WMF(SEER13)-0706 Page 3
This manual provides the installation
procedures so your air conditioner unit
operates properly and provides you the service
it was designed to provide.
Special adjustment may be necessary to suit
local requirements. Before using your air
conditioner, please read this instruction manual
carefully and keep it for future reference.
Safety Precautions
Before installing the air conditioner unit, please
read the following safety precautions carefully.
WARNING
!
•The installer must determine and follow all
applicable codes and regulations. This
equipment presents hazard of electricity, rotating
parts, sharp edges, heat and weight. Failure to
read and follow these instructions can result in
property, severe personal energy or death. This
equipment must be installed by experienced,
trained personnel only.
•Improper installation can cause equipment
damage, service personnel injury or death.
•Do not allow flammable fumes near unit or areas
sharing ventilation.
•Installation and maintenance must be performed
by qualified persons who are familiar with local
code and regulations, and experienced with this
type of appliance.
•All field wiring must be done in accordance with
industry standards and local codes.
•Inspect the unit nameplate to be certain the
voltage is the same as the voltage that will be
delivered to the unit. Improper electrical wiring
can cause property damage, severe personal
energy or death.
•The unit must be GROUNDED.
•Make sure wiring does not touch refrigerant
piping, compressor, or any moving parts of the
fan motors.
•Confirm that the power supply is switched OFF
before installing or servicing the unit.
WARNING
Hazardous Voltage!
Disconnect all electrical power including remote
disconnects before servicing. Failure to disconnect
power before servicing can cause severe personal
injury or death.
CAUTION
!
Use copper conductors only. Unit terminals are not
designed to accept other types of conductors. Failure
to do so may cause damage to the equipment.
CAUTION
!
•
Do no install in a laundry room. Humidity and laundry
chemicals can corrode unit components.
•Do not install the unit where leakage of flammable
gas may occur. If gas leaks and accumulates around
the unit, it may cause a fire.
•Connect drainage piping properly. If drainage piping
is not connected properly, water leakage can cause
property damage.
•Do not overcharge the unit. This unit is factory pre-
charged. Overcharge will cause over-current or
damage to the compressor.
•Keep panel closed. Unsecured panels will cause the
unit to operate noisily.
NOTICE
This product was carefully packed and thoroughly
inspected before leaving the factory. Responsibility for
its safe delivery was assumed by the carrier upon
acceptance of the shipment. Claims for loss or damage
sustained in transit must therefore be made upon the
carrier, as follow:
VISIBLE LOSS OR DAMAGE
Any external evidence of loss or damage must be
noted on the freight bill or carrier’s receipt, and signed
by the carrier’s agent. Failure to adequately describe
such external evidence of loss or damage may result in
the carrier’s refusing to honor a damaged claim. The
form required to file such a claim will be supplied by the
carrier.
CONCEALED LOSS OR DAMAGE
Concealed loss or damage means loss or damage
which does not become apparent until the product has
been unpacked. The contents may be damaged in
transit due to rough handling even though the carton
may not show external damages. When the damage is
discovered upon unpacking, make a written request for
inspection by the carrier’s agent within fifteen (15) days
of the delivery date. File a claim with the carrier since
such damage is the carrier’s responsibility.
!

Unit Dimensions
Model: M5WM10F, 10FR – Indoor Unit
Model: M5WM15F, 15FR, 20F, 20FR – Indoor Unit
Page 4 IM-5WMF(SEER13)-0706

Model: M5WM25F, 25FR – Indoor Unit
Model: M5LC10C, 10CR, 15C, 15CR – Outdoor Unit
IM-5WMF(SEER13)-0706 Page 5
Dimension A B C D E F G H
10C/CR 33-5/8” 24-3/4” 12-7/8” 7/8” 2-5/8” 23-3/4” 5” 15-3/8”
15C/CR 33-5/8” 28-3/4” 12-7/8” 7/8” 2-5/8” 23-3/4” 5” 15-3/8”
Dimension I J K L M
10C/CR 5/8” 14-1/4” 6-1/2” 3” 2-7/8”
15C/CR 5/8” 14-1/4” 6-1/2” 3” 2-7/8”

Model: M5LC20C, 20CR, 25C, 25CR – Outdoor Unit
Page 6 IM-5WMF(SEER13)-0706

Installation Guidelines
Installation Diagram
Condensate Disposal of Outdoor
Unit (Heat Pump Unit Only)
•There are 2 holes on the base of outdoor unit
for condensed water to flow out. Insert the
drain elbow to one of the holes.
•To install the drain elbow, first insert one
portion of the hook to the base (portion A), then
pull the drain elbow in the direction shown by
the arrow while inserting the other portion to
the base. After installation, check to ensure that
the drain elbow clings to base firmly.
•If the unit is installed where the condensate
may freeze in the base, remove plug at the
bottom of unit for better drainage
•See Figure 2.
Figure 2. Condensate Disposal of Outdoor Unit
(Heat Pump Unit Only)
Installation of the Indoor Unit
Indoor Unit Clearance
The indoor unit must be installed in a manner
to prevent mixing the discharged air with the
return air. Please follow the installation
clearances shown in Figure 3. Do not place the
indoor unit in direct sunlight. The location must
be suitable for piping and drainage, and be
away from doors or windows.
Figure 3. Indoor Unit Minimum Clearances
Installation of Outdoor Unit
Outdoor Unit Clearances
Install the outdoor unit in a manner to prevent mixing hot
discharged air with return air flow. Also the unit should be a
suitable distance from obstructions See Figure 1 for installation
clearances. Double the dimensions shown if surroundings are
more than 72” tall, or if there is an obstruction on top. Select the
coolest possible place where intake air temperature is not greater
than the outside air temperature (maximum 113ºF).
Figure 1. Outdoor Unit Minimum Clearances
IM-5WMF
(
SEER13
)
-0706 Page 7
Indoor Unit
Room
Cabinet
Remove side plate
when connecting the
piping and power
supply

Page 8 IM-5WMF(SEER13)-0706
Piping
The refrigerant piping can enter the indoor unit at several
different locations. Use the knock outs provided in the room
cabinet. See Figure 4.
Figure 4. Indoor Unit
Bend the pipes carefully to prevent kinks and restrictions.
It’s best to use a tube bender. The condensation drain hose
can be taped to the pipes. See Figure 5.
Figure 5. Rear View of Indoor Unit
Mounting Plate Installation
The mounting plate ships attached to the back of the
indoor unit. To detach for mounting on wall, remove
plastic rivet from bottom (pry loose with a knife blade)
and unhook.
The wall must be strong enough to support the weight
of the unit. If necessary, reinforce the wall. Drill holes in
plate to align with wall studs and attach with four (4)
screws.
If the refrigerant piping is going thru the wall behind the
indoor unit, provide a 2-1/2” hole that is slightly pitched
to the outside. See Figure 6. Hole must be located in
alignment with the arrows on the mounting plate. See
Figure 7.
Figure 6. Wall Opening for Piping
Figure 7. Mounting Plate/Wall Opening

IM-5WMF(SEER13)-0706 Page 9
Installing Unit on Mounting Plate
Hook the indoor unit onto the upper portion of the mounting
plate (engage the two hooks at the rear top of the indoor
unit with the upper edge of the plate). Properly seat the
hooks and replace the plastic rivet at the bottom.
Figure 8. Installing Unit on Mounting Plate
Drain Hose Installation
The condensate drain hose (20” long) come factory
attached to the indoor unit. It is gravity flow. Avoid
situations that could restrict drainage. See Figure 9.
Figure 9. Drain Hose Installation

Page 10 IM-5WMF(SEER13)-0706
Refrigerant Tubing
Tubing Length & Elevation
Copper tubing to connect the indoor and outdoor units is
supplied by others or it can be ordered from the factory.
See Table 1 for requirements. Cover both tubes individually
with 3/8” wall foam insulation.
Table 1. Refrigeration Tubing Requirements
Model 10 15 20 25
Maximum length, ft., L 40 40 50 50
Max. elevation, ft., H 16 16 26 26
Max. number of bends 10 10 10 10
Liquid tube size – OD ¼” ¼” ¼” ¼”
Gas tube size - OD 3/8” ½” ½” 5/8”
Note: The refrigerant pre-charged in the outdoor unit is for tubing length up
to 25ft. See Table 5, page 18 for additional R410A refrigerant required on
longer runs.
Figure 10. Tubing Length and Elevation
Tubing Preparation
•Do not use contaminated or damaged copper tubing. Do
not remove plastic, rubber plugs and brass nuts from the
valves, fittings, tubings and coils until you are ready to
connect suction or liquid line into valves or fittings.
•If any brazing work is required, ensure that the nitrogen
gas is passed through coil and joints while the brazing
work is done. This will eliminate soot formation on the
inside wall of the copper tubing.
•Cut the copper tubing with a tube cutter. See Figure 11.
•Remove burrs from cut ends by holding tubing
downwards to prevent metal chips from entering the
tubing.
•Slide the flare nuts, for both the indoor unit and outdoor
unit onto the copper tubing.
•Flare the tubing as shown in Figure 11, Figure 12 and
Table 2.
•The flare must be even and not cracked or scratched.
Figure 11. Cutting and Flaring Tube
Table 2: Tube Flaring Dimensions
Tube Diameter - OD X (in.)
Inch Imperial Rigid
¼ .051 .028
3/8 .063 .039
½ .075 .051
5/8 .087 .067
Tubing Connection To Units
•Connect the copper tubing to both the indoor and
outdoor units. See Figure 12.
•Torque each flare nut to specifications. See Table 3.
•Cover both tubes individually with 3/8” minimum wall
foam insulation.
Table: Flare Nut Torque Specifications
Tube Size (in.) Torque (ft./lb.)
¼ 13.3
3/8 31.0
½ 40.6
5/8 48.0
Figure 12. Flare Tubing Connections
HL
Outdoor Unit