Quietside QSCU-361 Supplement

QSCU Series
Installation & Service Manual
8750 Pioneer Blvd. Santa Fe Springs, CA 90670 Phone: [phone], Fax: [phone] www.quietside.com
6 Pine Hill Dr, Carlisle PA 17013 Phone: [phone], Fax: [phone]

This manual to is to aid the qualified HVAC contractor in the Installation and Maintenance of this Quietside
R410a Side Discharge Condensing unit
Please read and understand these instructions prior to installing the unit, failure to comply with these
instructions may result in improper installation, operation and maintenance, possibly resulting in fire,
electrical shock, property damage, personal injury or death
Installers please retain this manual for future reference, please pass warranty registration to end user
If Technical Assistance is required during installation or start up, please visit our website at
www.quietside.com
or call 1-562-699-6066 or 717 243 2535 to speak to a Technical Service Assistant
When calling please have the Model numbers and Serial numbers available
Read all the Instructions, Install and apply the system per those instructions
Use the unit only in the manner described in this manual
1 Check Rating Plate for correct system voltage before installing the unit
Installing and operating a unit with the incorrect voltage may result in malfunction or
other issues and will void the warranty
2 Units must be connected to a correctly grounded Electrical Supply
3 Do not use the units if they have been dropped or otherwise damage or installed
incorrectly
The manufacturer of the unit will not be liable for any damages caused by failure to comply with the
installation and operating instructions in this manual
The unit Rating Plate contains pertinent information to the unit operation, please refer to it as required
Completely read all Instructions prior to assembling installing,
operating, or working on these units
Inspect all parts for damage prior to installation and start up
Units must be installed by a Qualified HVAC Contractor
Questions?
Call Technical Support Quietside West : 562 699 6066 x 3
Quietside East : 717 243 2535
Installation and Maintenance Manual
This symbol is an indication of Important Safety Information
Safety Instructions
Note to Installer
Report all Shipping Damage to Carrier IMMEDIATELY, Check units and box exterior for damage

Installer Supplied Items
Refrigerant Line Set : Brazed Connection only, suitable for R410A with both lines insulated, max length 100ft.
Main System Breaker : Sized per unit requirements, to be mounted adjacent to Outdoor unit.
Local Disconnect and power whip : Mounted adjacent to Condensing unit.
Low Voltage Control Wiring : Y & C Wires required from Indoor unit/Thermostat.
Mounting Hardware : Wall Anchors, Condenser Pad etc.
Refrigerant : R410A required for additional line set charge (Unit is charged for 25ft interconnect as standard).
Items for Consideration
Application
Check the application of the unit prior to installation, certain applications require additional components or
installation parameters
Indoor Unit Expansion Device
It is MANDATORY to use an Indoor unit or Coil equipped with a correctly sized balanced port TXV to control
refrigernat flow to the evaporator coil.
Use of a TXV will ensure maximum efficiency of the unit plus control Suction gas quality to ensure reliability
over the lifetime of the unit. Not using a correctly sized TXV will
V
OID THE WARRANTY
Locate the Indoor and Outdoor units as close together as possible, maximum line set run and lift CANNOT
BE EXCEEDED, then determine how the Interconnect piping, wiring and condensate hose is to be run.
Unit
QSCU-361
QSCU-481
QSCU-601
Ensure that all panels can be removed for service as required
Certifications
Safety
All Quietside QSCU Side Discharge Units are certified under UL Standard 1995 by ETL for sale in both
US and Canada
Performance
Performance is certified by our pending certification under the ARI 210/240 Program
100 Feet
100 Feet
Max Vertical Lift
3/8" & 3/4"
50 Feet
50 Feet 1/2" & 7/8"50 Feet
Line Sizes
3/8" & 5/8"
Max Line Set Run
100 Feet
Installation and Maintenance Manual
Page 2

Controls and Components
Units are set up to be used with a 24V AC Cooling only or Cool - Supplemental heat thermostat
Two wires are connected from either the thermostat or the Indoor unit (depending on Indoor unit
model) to the Outdoor unit
All unit operating functions are controlled via the thermostat
Optional Controls and Components
Low Ambient Controller : ICM 326H must be used in Data Room or Commercial applications
For a wiring diagram please contact Quietside or follow general diagram supplied with ICM Controller
Probe must be located in the fin pack or on a return bend that measures approx 100 DegF during normal
operation
Follow Instructions, failure to follow instructions may cause
possible malfunction and void any warranty
Step 1
Remove unit from the carton/bo
x
Carton contains Installation manual, check that the Suction and Liquid Service Valves have not been
damaged prior to installation
Step 2
Locate area to Install Condensing unit
Unit must be installed on a flat, stable, and solid surface to prevent excessive noise and vibration.
When hanging the unit on the outside of building mounting brackets capable of supporting the unit weight are
MANDATORY. If you have any questions regarding installation please contact the manufacturer.
Installing the unit on a side walk can cause inconvenience to pedestrians, ensure no obstruction is caused.
Don’t forget to peel any protective film and tapes off the unit after installation.
Clearances for the Outdoor unit are :
Install the Outdoor on a Condenser Pad (recommended)
8" Minimum
Service
Valves
8" 12"
Minimum Minimum
24"
24" Minimum recommended
Unit Installation
Installation and Maintenance Manual
Outdoor Unit Rear
Front Condenser Fan

Step 2 (Cont)
Do not install the Outdoor unit in a location exposed to high winds (field fabricated and installed wind baffle
may be required). When installing unit on roof ensure that if possible unit is faced so that airflow through
the unit is not affected by any prevailing wind
Ensure location does not impede access around unit and pose a disturbance to neighboring areas
Ensure that location offers easy access to Electrical power and that line set run to Indoor unit will not exceed
the stated Maximum line set runs or lifts
Ensure that location is away from gutters or other areas where water, snow or ice can drain directly onto the
unit, also to maximize unit efficiency of the unit do not install it where it can be exposed to direct sunlight
Mounting Hole Location
Model
QSCU-361
QSCU-481
QSCU-601
When locating multiple units in an area ensure that the hot condenser discharge air cannot enter the coil
of another unit, possible malfunction and loss of capacity and efficiency may occur
Always locate the units in line or facing each other
Airflow on the Quietside QSCU is reversed to reduce noise levels with the condenser fan sucking in intake air
and exhausting it through the condenser coil side of the unit
Installation and Maintenance Manual
Dimension A Dimension B
Unit Installation (Cont)

Step 3
Refrigerant Line Set Piping
Use only refrigerant grade copper tubing, ensure line set sizing follows the published table.
Interconnecting line set between the Outdoor unit and the Indoor unit, must have the Suction refrigerant line
insulated with a minimum of 3/8" thick armaflex or similar insulation.
INSTALL A LIQUID LINE SIGHT GLASS & R410A FILTER DRIER IN THE SYSTEM
Run the line set to the Indoor unit, avoid tight bends and kinking the lines.
Quietside does not recommend the use of "Street Elbows" to make bends, this is due the pressure drop
incurred with these.
Always use long radius elbows or use a tube bender to ensure refrigerant flow in the system.
Unit Max Line Set Run Suction Liquid
QSCU-361 5/8" 3/8"
QSCU-481 3/4" 3/8"
QSCU-601 7/8" 1/2"
Line Set sizing must be as shown in the table, maximum line length cannot be increased by altering line sizes.
When placing Outdoor unit below the Indoor unit
a trap is required every 20ft to ensure correct oil
return to the condensing unit.
Unit Installation (Cont)
Max Vertical Lift
Installation and Maintenance Manual
100 Feet 50 Feet
ONLY MATCH WITH INDOOR UNITS USING TXV’S AS THE EXPANSION DEVICE
100 Feet 50 Feet
100 Feet 50 Feet
Page 5

Step 4
Connect Refrigerant Line Set Piping
Flow nitrogen or other inert gas through piping while
brazing to prevent formation of copper oxide.
To avoid damage while brazing, service valves need
to be wrapped with a heat-sink material such as a
wet cloth to prevent possible damage to the valve
seals
Field piping and fan coil must be leak tested before
start-up. Nitrogen or other inert gas should be used
A minimum pressure of 250 psig should be used
Any detected leaks should be repaired prior to
placing the system on the vacuum pump
Step 5
Evacuation
Gauges should be attached to both the service ports -
Evacuate the unit down to a minimum of 200 Microns, break vacuum with Nitrogen to further leak check
Re-evacuate the system down to 200 Microns or lower
This is an R410A System it is essential that a deep vacuum be pulled on the system to remove all traces of
moisture
Unit Installation (Cont)
Installation and Maintenance Manual

Installation (Cont)
Step 6
Main Power Wiring
Electrical Wiring should be done in accordance with all National
Electrical Code (NEC) and local state/city building codes
Breaker size and wiring must be sized for the rating plate amperage, MCA and MOP
If a smaller than required breaker is used possibility of unit damage etc could occur
Use only HACR type breakers, each system installed must have a separate branch circuit with an individual
breaker/fuse
QSCU-361 QSCU-481 QSCU-601
Power Voltage
Breaker Size 30A 50A 60A
RLA Cooling (Amps) 9.9A 13.9A 14.1A
Control Voltage 24V AC 24V AC 24V AC
Size the wiring between the breaker and local disconnect per all applicable national, local and provincial
codes
A
local disconnect should be installed adjacent to the Outdoor unit in accordance with all applicable codes
Two Knockouts are provided
in the side panel of the unit
One knockout is for power
230V wiring
One knockout is for control
24V wiring
Installation and Maintenance Manual

Step 6
Wiring (cont)
Electrical Wiring should be done in accordance with all National Electrical
Code (NEC) and local state/city building codes
Power Wiring - 208/230V to L1 and L2
Ground wire to Terminal E
Control Wiring Y and C wires from the
Air Handler or Thermostat to wired to the
Outdoor unit to energize the compressor
The basic system installation is now complete
The unit is now ready for start up -
Use this time to ensure that worksite is tidy. Quietside recommend the use of Slimduct products to hide
the refrigerant line set interconnects - available from your Quietside distributor
Unit Installation (Cont)
Installation and Maintenance Manual

With the refrigerant system completely evacuated the system can now be opened to allow the refrigerant
charge in the Outdoor unit to be released into the line set.
The Service Valves require Allen wrenches sized per the table to undo the valve stems .
Remove the brass caps from the Service Valves to access the valve stems.
QSCU-361
QSCU-481
QSCU-601
Open the service valves to flood the system with refrigerant.
Unscrew both valve stems until they come to a stop against the valve body, replace the Brass Caps and
then tighten the caps to prevent leaks.
Energize the breaker to allow system to be powered.
Unit is charged with enough R410A refrigerant for a line set of 25ft length.
QSCU-361
QSCU-481
QSCU-601
For longer line set lengths additional charge must be WEIGHED in per the following table
40 50 60 75 90 100
7.5oz 12.5oz 17.5oz 25oz 32.5oz 37.5oz
7.5oz 12.5oz 17.5oz 25oz 32.5oz 37.5oz
7.5oz 12.5oz 17.5oz 25oz 32.5oz 37.5oz
Standard Operation of the unit - Cooling
Indoor Temperature Split 20 DegF
Suction Pressure 125 Psig, approx 43 DegF
Suction Line Temperature 50-55 DegF
Installation and Maintenance Manual
QSCU-361
QSCU-481
QSCU-601
Service Valve Wrench size
Unit
R410A Charge
159 oz
Added Charge required for a line set of varying lengths
194 oz
194 oz
Unit Start Up
4mm
8mm 4mm 4mm
Suction Valve
4mm Liquid Valve 4mm
Add Charge at
0.5oz/ft
0.5oz/ft
0.5oz/ft
Page 9