Hussmann Scroll Plus Fibertronic 401789 Manual

Scroll Plus™
Fibertronic™
P/N 401789
Installation and
Service Manual
®
®
Contents
Tables
Figures

Being Safe is Your Responsibility.
Wear proper eye protection whenever working.
Wear proper hearing protection whenever
working in a machine room.
Stand to one side–never work directly in
front of:
•Any valve you are opening or closing
Manual refrigeration valves
Regulator valves on brazing tanks and
nitrogen tanks
•Electrical Circuit Breakers
•Refrigeration lines you are cutting or opening
Always use a pressure regulator with a nitro-
gen tank.
•Do not exceed 2 pounds of pressure and
vent lines when brazing.
•Do not exceed 350 pounds of pressure for
leak testing high side.
•Do not exceed 150 pounds of pressure for
leak testing low side.
Use only a striker to light torch.
Know whether a circuit is open at the power
supply or not. Remove all power before
opening control panels.
Always supply proper ventilation.
•Refrigerants and nitrogen can displace oxygen
causing suffocation.
•Refrigerants exposed to flame can produce
phosgene, a poisonous gas.
Be sure refrigeration lines are free of pressure
before cutting. Check:
•Both sides of a two way valve
•All lines to a 3-way or 4-way valve
Dangerous hydraulic explosions may result if
you
•Isolate liquid lines or compressor when they
can absorb heat over an extended time period
•Overfill pumpdown refrigerant containers
Never vent refrigerants
into the atmosphere.
Revised August 1, 1996
SAFETY TIPS
Contents
Tables
Figures

Congratulations!
With the purchase of Hussmann's Scroll Plus™ Fibertronic™ System, you are
receiving equipment designed to provide the finest refrigeration and temperature
control for modern supermarket display equipment and coolers.
Since the introduction of Hussmann Central Refrigeration Systems, thousands of
installations have confirmed our belief that, as with all fine equipment, good
installation and proper adjustment are the keys to customer satisfaction.
The information presented in this manual includes many details resulting from
our experience over many years. Its use will guide the contractor to a successful
installation. Time taken to read and to understand this information will pay off in
reducing lost time and duplication work.
Should there be questions concerning this information, do not hesitate to write
me. Your inquiry will be welcomed.
George Ballinger
Manager of Field Service
970901
Hussmann Corporation
12999 St. Charles Rock Road
Bridgeton, Missouri 63044-2483
[phone]
®
Contents
Tables
Figures

Scroll Plus™
Fibertronic™
Installation and
Service Manual
Hussmann Corporation
12999 St. Charles Rock Road
Bridgeton, MO 63044-2483
Printed in USA
P/N 401789
September, 1997
®
®
®
Contents
Tables
Figures
Tables
Figures

9709
HUSSMANN CORPORATION •BRIDGETON, MO 63044-2483 (Printed in USA)
P/N 401789
Page iii
Scroll Plus™Fibertronic™
Installation and Service Manual
Contents
Installation Instructions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1
Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1-1
Scroll Plus™ Components - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2
Shipping Damage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2
Scroll Plus Frame Dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1-2
System Weights - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2
Receiver Refrigerant Capacities - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2
Machine Room Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-3
Scroll Plus Load Points - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-3
Unit Placement - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1-3
Lifting and Leveling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-5
Setting Without a Crane - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-5
Scroll Plus Refrigeration Process - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1
Oveview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1
Scroll Plus Fibertronic Refrigeration System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2
Basic Refrigeration Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-4
Heat Reclaim Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-6
Receiver Pressure and Vapor Temperature Regulation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-6
Koolgas Defrost Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-7
Oil Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-8
Subcooling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-9
Mechanical Subcooling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-9
Component Piping - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1
Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1
Refrigeration Line Runs - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1
Rack to Condenser Piping - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-3
Rack to Heat Reclaim - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-6
Offset and Expansion Loop Construction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-6
Special Piping for Open Rooms - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-7
Connecting Parallel 3-Way valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-7
Run Lengths and Equivalent Feet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-7
Line Sizing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-8
Branch Line Piping - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-8
Tables
Figures

P/N 401789
Page iv
9709
HUSSMANN CORPORATION •BRIDGETON, MO 63044-2483 (Printed in USA)
Contents
Contents (Continued)
Electrical - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1
Oveview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1
Field Wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1
Wiring Guidelines Based on Various Components - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-2
Using Schematics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-3
Compressor Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-4
Compressor Board Related Circuits - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-12
Defrost Circuit Boards - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-20
Defrost Control Circuits - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-24
Other Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-28
Power Monitor - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-29
Remote Satellite, Remote Condenser - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
Remote Satellites
Remote Satellite Components - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
Shipping Damage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
Lifting and Leveling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-2
Remote Satellite Dimensions and Weights - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-2
Remote Condensers - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3
General Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3
Air Cooled Application - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3
Shutoff Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3
Lifting and Leg Assembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-4
Location - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-4
Leveling and Mounting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-4
Preliminary Electrical Check - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-5
Preliminary Control Setting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-5
Physical Data - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-6
Split Condensers - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-9
Electrical and Preliminary Checkout - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-10
Tables
Figures

9709
HUSSMANN CORPORATION •BRIDGETON, MO 63044-2483 (Printed in USA)
P/N 401789
Page v
Scroll Plus™Fibertronic™
Contents (Continued)
Control Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-1
Oveview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-1
EPR Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-1
Koolgas Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2
Main Liquid Line Solenoid Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-4
Branch Liquid Line Solenoid Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-6
TEV - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-7
Heat Reclaim - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-9
Flooding Valve and Receiver Pressure Regulating Valve - - - - - - - - - - - - - - - - - - - - - - - - - - 6-10
Autosurge and By-Pass Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-12
Mechanical Subcooling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-15
Oil Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-16
Control Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Compressor Oil Failure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Pressure Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Plate Subcooling Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
EPR Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Winter Condensing Pressure Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-2
Mechanical Low Pressure Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-2
Condenser Pressure and Temperature Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-8
Merchandiser Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-9
Start-Up and Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-1
Start-Up - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -8-1
Leak Testing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-1
Test Charge - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-1
Oil Levels - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-2
Evacuation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-2
Charging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-3
Compressor Motor Rotation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-4
Final Checks - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-5
Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-5
Compressor Replacement - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-5
Cleaning the Turba-Shed - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-6
Replacing Drier and Filter Cores - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-6
Warranty
Tables
Figures

P/N 401789
Page vi
9709
HUSSMANN CORPORATION •BRIDGETON, MO 63044-2483 (Printed in USA)
Contents
List of Tables
Table No. Title Page
3-1 “L” Values for Figuring Offsets and Expansion Loops - - - - - - - - - - - - - - - - - - - - 3-7
3-2 Equivalent Feet for Angle Valve and Elbow - 90 Deg. - - - - - - - - - - - - - - - - - - - - 3-8
4-1 Required Field Wire Size - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-2
4-2 Alarm Board Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-5
4-3 Compressor Board Troubleshooting
Mechanical Low Pressure Control or Series Switchback - - - - - - - - - - - - - - - - - -4-9
4-4 Compressor Board Troubleshooting
EPC Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-11
4-5 Troubleshooting Defrost Board with Fibertronic Time Clock - - - - - - - - - - - - - - - 4-23
5-1 Remote Air Cooled Condenser Physical Data - - - - - - - - - - - - - - - - - - - - - - - - - - 5-6
6-1 Troubleshooting EPR Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2
6-2 Troubleshooting Koolgas Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-3
6-3 Troubleshooting Branch Liquid Line Solenoid Valves - - - - - - - - - - - - - - - - - - - - 6-6
6-4 Troubleshooting the TEV - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-8
6-5 Troubleshooting Flooding Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-10
6-6 Troubleshooting Receiver Pressure Regulator - - - - - - - - - - - - - - - - - - - - - - - - - 6-11
EPR Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Alco Cartridge-style Low Pressure Control Cut Out Pressures - - - - - - - - - - - - - - - 7-3
Other Mechanical Low Pressure Control Settings - - - - - - - - - - - - - - - - - - - - - - - 7-4
Condenser Pressure and Temperature Settings - - - - - - - - - - - - - - - - - - - - - - - - - 7-8
Merchandiser Settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-9
Figures
Contents

9709
HUSSMANN CORPORATION •BRIDGETON, MO 63044-2483 (Printed in USA)
P/N 401789
Page vii
Scroll Plus™Fibertronic™
List of Illustrations
Figure No. Title Page
1-1 Scroll Plus™ Fibertronic™ System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1
1-2 Electrical Clearance Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-3
1-3 Allowable Distances - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-4
1-4 Lifting and Leveling the Scroll Plus System - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-5
2-1 Scroll Plus Refrigeration System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2
2-2 Refrigeration Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-4
2-3 Turba-Shed - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-4
2-4 Heat Reclaim Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-4
2-5 Flooding Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-4
2-6 Main Liquid Line Pressure Differential Valve - - - - - - - - - - - - - - - - - - - - - - - - - - 2-5
2-7 Branch Liquid Line Solenoid Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-5
2-8 TEV - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-5
2-9 EPR Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-5
2-10 Heat Reclaim Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2-6
2-11 Receiver Pressure Regulation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-6
2-12 A9 and A9B Valves - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-6
2-13 Koolgas Defrost Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-7
2-14 Koolgas Defrost with Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-7
2-15 Scroll Plus Oils Return System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-8
2-16 Liquid Injection Schematic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-9
2-17 Autosurge for Ambient Cooling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-10
2-18 Mechanical Subcooling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-10
3-1 Supporting Refrigeration Lines - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1
3-2 Insulating a Riser - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2
3-3 Vibration Allowance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2
3-4 Trap Construction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2
3-5 Reduced Riser - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2
3-6 Rack to Condenser Piping - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-3
3-7 Rack to Condenser, 3-Way Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-4
3-8 Rack to Condenser, Two Tiers - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-5
3-9 Offset Construction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3-6
3-10 Expansion Loop Connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-7
3-11 Connection to Parallel Suction Stubs - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-7
3-12 Branch Piping - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-8
Tables
Contents

P/N 401789
Page viii
9709
HUSSMANN CORPORATION •BRIDGETON, MO 63044-2483 (Printed in USA)
Contents
List of Illustrations (Continued)
Figure No. Title Page
4-1 Alarm Board Circuits - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-3
4-2 Alarm Board - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-4
4-3 Compressor Board Faceplate - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-6
4-4 Compressor Circuit Board Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-7
4-5 Compressor Board – Mechanical Low Pressure Control - - - - - - - - - - - - - - - - - - - 4-8
4-6 Compressor Board – EPC Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-10
4-7 K2 & Motor Contactor Circuits - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-12
4-8 K1 & Compressor Alarm Circuits - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-13
4-9 Parallel Switchback Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-14
4-10 Series Switchback Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-15
4-11 Switchback Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-16
4-12 Koolgas Relay - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-17
4-13 Compressor Protection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-18
4-14 Circuits Parallel to the Compressor Motor Contactor Coil - - - - - - - - - - - - - - - - - 4-19
4-15 Branch Board Faceplate - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-20
4-16 Defrost Board Inputs and Outputs - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-21
4-17 Defrost Board – Electronic Timer - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-22
4-18 Defrost Control Circuit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-24
4-19 Suction Stop Koolgas Defrost - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-25
4-20 Electric Defrost - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-26
4-21 Off Cycle Defrost - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-27
4-22 Refrigeration Thermostat with Heater Mounted Solenoid - - - - - - - - - - - - - - - - - 4-28
4-23 Wiring Defrost Termination Thermostats - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-28
4-24 Power Monitor and Slave Contactor - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-29
4-25 Electrical Hook-up - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-29
5-1 Satellite Rigging and Lifting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-2
5-2 Lifting the Condenser - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-4
5-3 Ambient Control of All Banks with Pressure Override of the First Fan Bank - - - - - 5-7
5-4 Pressure Control and Gravity Dampers for all Fan Banks - - - - - - - - - - - - - - - - - - 5-8
5-5 Split Condenser Piping Method - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-9
5-6 Split Condenser Wiring Diagram – Factory and Field Installed Kits - - - - - - - - - - - 5-9
5-7 Line Voltage Thermostatic Fan Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-11
5-8 Pilot Operated Thermostatic Fan Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-12
5-9 Line Voltage Thermostatic with Pressure Override Fan Control - - - - - - - - - - - - - 5-13
5-10 Pilot Operated Thermostatic with Pressure Override Fan Control - - - - - - - - - - - - 5-14
5-11 Control B Line Voltage Pressure Control and Gravity Dampers for All Fans - - - - 5-15
5-12 Control B Pilot Operated Pressure Control and Gravity Dampers for All Fans - - - 5-16
Tables
Contents

9709
HUSSMANN CORPORATION •BRIDGETON, MO 63044-2483 (Printed in USA)
P/N 401789
Page ix
Scroll Plus™Fibertronic™
List of Illustrations (Continued)
Figure No. Title Page
6-1 Typical EPR Valve with Suction Stop Solenoid - - - - - - - - - - - - - - - - - - - - - - - - - 6-1
6-2 Koolgas Valve Piping - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2
6-3 2-Way Solenoid Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-3
6-4 3-Way Solenoid Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-3
6-5 Main Liquid Line Solenoid - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-4
6-6 Alco Main Liquid Line Solenoid - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-5
6-7 Branch Liquid Line with Back Flow - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-6
6-8 Probe Locations for Setting TEV - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-7
6-9 TEV - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-7
6-10 3-Way Heat Reclaim Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-9
6-11 Condenser and Receiver Pressure Regulation - - - - - - - - - - - - - - - - - - - - - - - - - 6-10
6-12 A8 Flooding Valve - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-10
6-13 A-9 Receiver Pressure Regulator - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-11
6-14 A9B Receiver Pressure Regulator with Solenoid and Pilot Port - - - - - - - - - - - - - 6-11
6-15 Autosurge Cycle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-12
6-16 Autosurge Valve Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-13
6-17 Establishing Valve Operation Range - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-14
6-18 Plate Type Mechanical Subcooler - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-15
6-19 Scroll Plus Oil Return System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-16
Tables
Contents

OVERVIEW
This section is limited to the information needed
to set the Scroll Plus™ Compressor System.
Power supply requirements are found under
“Electrical”; piping, under “Piping”; and charg-
ing, under “Start-up and Maintenance”. Auxiliary
units are found in the sections devoted to them or
in the manuals accompanying them.
SCROLL PLUS™ COMPONENTS
Each Scroll Plus System contains the following:
1. The Scroll Plus System is capable of two tiers
of compressors, with two to four Copeland
scroll compressors in parallel per tier,
equipped with:
a. High and Low Pressure Controls
b. Traxoil Oil Safety Control
c. Primary Overload Protection
2. Factory piping with
a. Suction, Discharge and Liquid Headers
b. Turbashed Oil Separator
c. Vertical Receiver per Tier of Compressors
d. Suction Filters on each Compressor
e. Liquid Drier and Sight-glass
f. Liquid Level Indicator
3. Factory-wired control panel(s) with
a. Pre-wired Distribution Power Block
b. Individual Compressor Integral Breaker /
Contactors
c. Compressor Time Delays
d. Color-coded wiring system
e. Customized wiring diagram
4. Items supplied separately for field installation
a. Liquid Drier Core
b. Vibration Isolation Pads (8)
c. Loose shipped items for accessories.
September 1, 1997 P/N 401789
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INSTALLATION INSTRUCTIONS
Figure 1-1 — Scroll Plus™ Fibertronic™ System
Return to Contents

SHIPPING DAMAGE
All equipment should be thoroughly examined for
shipping damage before and while unloading.
This equipment has been carefully inspected at
our factory and the carrier has assumed responsi-
bility for safe arrival. If damaged, either apparent
or concealed, claim must be made to the carrier.
Apparent Loss or Damage
If there is an obvious loss or damage, it must be
noted on the freight bill or express receipt and
signed by the carrier's agent; otherwise, carrier
may refuse claim. The carrier will supply the
necessary claim forms.
Concealed Loss or Damage
When loss or damage is not apparent until after
equipment is uncrated, a claim for concealed
damage is made. Upon discovering damage, make
request in writing to carrier for inspection within
15 days and retain all packing. The carrier will
supply inspection report and required claim forms.
SCROLL PLUS™ FRAME DIMENSIONS
Rack Assembly Length Height Depth
Nomenclature (in.) (in.) (in.)
22YU 123 50 35
01FY 99 76 35
03FY 123 76 35
Piping stubs, and shipping crate may extend
6 inches beyond the frame.
SYSTEM WEIGHTS
Base Rack Weight
Rack or Receiver Nomenclature Weight (lbs)
22YU 500
01FY 600
03FY 700
05FY, 06FY 300
07FY, 08FY 500
Plate Subcoolers add 100 lbs.
Compressor Weights
Compressor Weight per
Horsepower compressor (lbs)
3 — 6 100
7.5 — 10 300
13 — 15 350
Shipping Weight = Rack Base Weight
+ Receiver(s) Weight
+ Sum of Compressor Weights
RECEIVER REFRIGERANT CAPACITIES
Receiver Capacities are based on 80% liquid fill
at 110ÞF. Dimensions are in inches or pounds.
Receiver Dia.. Length R-404a /
Assembly R507 R-22
(in.) (lbs) (lbs)
05FY, 06FY 12 45 175 205
07FY, 08FY 14 68 355 425
INSTALLATION INSTRUCTIONS September 1, 1997
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HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Return to Contents

MACHINE ROOM REQUIREMENTS
The equipment room floor must solidly support the
compressor unit as a live load. Ground level instal-
lation seldom presents problems, but a mezzanine
installation must be carefully engineered.
Ventilation should be 100 cfm per compressor
unit horsepower. The air inlet should be sized for
a maximum of 600 fpm velocity. The ventilation
fans should cycle by thermostatic control.
All machine room ventilation equipment must be
field supplied. Check local codes for variances.
Proper ventilation provides airflow across the
compressors. Duct work may be necessary.
Provide a floor drain for disposal of condensate
that may form on the compressor unit or defrost
header assembly.
Equipment must be located in the machine room
to provide enough working space for service
personnel, and to meet electrical codes.
Consult NEC National Fire Handbook, particu-
larly “Installation of Switch Boards” and
“Working Space Requirements”. The figure below
demonstrates some suggested distances. Refer to
local codes for each installation.
SCROLL PLUS LOAD POINTS
Rack Assembly Load Point Dimensions
Nomenclature Length Width
(in.) (in.)
All 62.7 30
UNIT PLACEMENT
When setting the Scroll Plus System plan in rela-
tion to the rest of the equipment to be installed,
some minimum and maximum distances are list-
ed. Note: Piping equivalent is not the same as
linear distance.
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HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
4 ft Min 3 1/2ft Min
3 ft Min
Grounded Metal Rail
ScrollPlus™ Rack
Scroll Plus™Rack
2 ft Min 2 ft Min
3 ft Min
Remote
Satellite
Concrete Block Wall
Remote
Satellite
Figure 1-2 —Electrical Clearance Requirements
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Minimum Allowable Distances
From a Water Cooled Condenser Outlet to the
Scroll Plus Receiver Inlet, the minimum allow-
able elevation is 1 foot.
With no Flooding Valve, the minimum allowable
distance is 4.5 feet from the mounting surface of
the air cooled Condenser to the mounting surface
of the Scroll Plus Rack.
With a Flooding Valve, the minimum allowable
distance is 6 feet from the mounting surface of the
air cooled Condenser to the center of the flooding
valve.
Maximum Allowable Distances
Remote Satellites should not be placed below the
level of the Scroll Plus Rack. The Satellite may be
positioned above the Rack. The maximum allow-
able elevation is 6 feet from the bottom of the
Satellite to the bottom of the Rack.
When piping from the Rack to a Remote Satellite,
the maximum allowable piping equivalent is
50 feet.
When piping from the Rack to a Remote Header,
the maximum allowable piping equivalent is
50 feet.
When piping from the Rack to a Condenser, the
maximum allowable piping equivalent is 100 feet.
When piping from the Rack to a Heat Reclaim
coil, the maximum allowable piping equivalent is
50 feet.
INSTALLATION INSTRUCTIONS September 1, 1997
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HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Condenser
Piping Equivalent 50 ft Max
Condenser
Piping Equivalent 50 ft Max
6 ft Min
6 ft Max
ScrollPlus Rack Remote Satellite
Remote Header
Flooding
Valve
Field-Installed
Water Cooled
Condenser
1 ft Min
Piping Equivalent 100 ft Max
W/O Flooding Valve
4.5 ft Min
W/ Flooding Valve
Figure 1-3 —Allowable Distances
Return to Contents

LIFTING AND LEVELING
Using rigging with a spreader bar, the Scroll Plus
System may be lifted into position. The spreader
bar is required to prevent damage to the unit.
Note: This unit is front heavy, due to the control
Panel(s), and compressor locations. Take neces-
sary precautions when lifting, and lift only from
lower base support feet.
Vibration isolation pads are supplied with each
rack. The entire weight of the rack must rest on
these pads, with the rack cross leveled. To adjust
for slightly uneven floors, place 16 gauge 3 x 3
galvanized steel shims between the pads and the
floor. (Shims must be field supplied.)
SETTING WITHOUT A CRANE
In many locations crane lifting may not be prac-
tical. Where possible use equipment dollies
centered under each foot, or Johnny Bars. Do
not push or pull on any of the pipes, valves,
accessories, or control panels when moving the
Scroll Plus System.
For mezzanine installations, a fork lift (operated
within its height and weight limits) may be used
to raise the Rack into position.
Caution: The unit is front heavy due to the
control panel(s), and compressor locations. Take
necessary precautions when lifting, and lift only
from lower base support feet.
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HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Use Appropriate Spreader Bars
Two 1" Pads
Front and Back
1" Pads Under
Center Support
Two 1" Pads
Front and Back
Figure 1-4 —Lifting and Leveling the Scroll Plus System
Return to Contents

OVERVIEW
This section details the refrigeration process by
tracking the refrigerant flow through the system
components. The following topics are discussed
in this section.
Scroll Plus™ Refrigeration System
Basic Refrigeration
Heat Reclaim
Receiver Pressure and
Vapor Temperature Regulation
Koolgas Defrost
Oil System
Subcooling — Autosurge and Mechanical
Liquid Injection
The Scroll Plus™system is designed with vertical
receivers to reduce the effective refrigerant
charge. The compact design reduces height and
width requirements, yet provides access to com-
ponents for maintenance and service from the
front or sides of the unit. Because of the use of
Scroll Compressors, vibration characteristics are
greatly reduced, extending system life and mini-
mizing chances for fatigued line breakage.
In this instruction the following criteria is main-
tained to assist the reader.
Electrical solenoid valves carry the same initial
abbreviations as in the electrical schematics.
Refrigeration lines not actually in the cycle being
discussed are shown closed or are removed.
Each refrigerant state maintains the same fill
pattern throughout the instruction.
Pressures in oil lines will also retain a fixed
pattern.
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HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
REFRIGERATION PROCESS
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REFRIGERATION PROCESS September 1, 1997
2 - 2
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Figure 2-1 — Scroll Plus™ Fibertronic™ Refrigeration System
Heat Exchanger
Evaporator
Condenser
HS
Heat Reclaim Coil
Discharge Manifold
Heat Exchanger
Evaporator
Heat Exchanger
Evaporator
Satellite
Turba-Shed
Satellite
Compressor
Suction Manifold
Koolgas Manifold
A8
Liquid Manifold
MS
SSS
EPR
A9B
Valve
BP
3W
3W
Receiver
Return to Contents

MS
Ball Valve
Check Valve
Compressor Service Valve
2-Way Valve
3-Way Valve
Valve Solenoids
Sight Glass
Suction Filter
Liquid Line Drier
Thermal Expansion Valve
(TEV)
Pressure Regulating Valve
A8 for Condenser
A9 for Receiver
EPR for Evaporator
Main Liquid Line Pressure
Differential Valve
Autosurge Valve (Optional)
Heat Exchanger (Optional)
High Pressure Hot Vapor
High Pressure Warm Vapor
High Pressure Warm Liquid
Reduced Pressure Warm
Liquid
Low Pressure Cool Vapor
Cut-away not shown
(Empty)
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HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Return to Contents

BASIC REFRIGERATION CYCLE
Beginning with the Parallel Compressors, refrig-
erant vapor is compressed into the Discharge
Manifold and is routed to the Turbashed oil sep-
arator. The Turbashed separates the liquid oil
from the refrigerant vapor by centrifugal force,
screen baffles and velocity reduction. The oil is
stored in the bottom reservoir portion of the
Turbashed and from there is distributed to the
compressors.
A 3-way Heat Reclaim Valve (HS) directs the
refrigerant to either the condenser or a heat
reclaim coil. When the HS solenoid is de-ener-
gized the valve directs the refrigerant to the
condenser.
The Condenser rejects the unwanted heat to
atmosphere, out of the system.
The Flooding Valve (A8) maintains minimum
discharge pressure during low ambient tempera-
ture conditions by reducing the effective condens-
ing surface. Restricting liquid refrigerant flow
from the Condenser, the Flooding Valve prevents
liquid refrigerant from leaving the condenser as
fast as it is forming, so the Condenser floods with
its own condensate.
The Vertical Receiver acts as a vapor trap and
supply the Main Liquid Pressure Differential
Solenoid Valve with quality liquid refrigerant.
Sufficient liquid, vapor, and pressure are critical
to the operation of the system. The system main-
tains these balances in the Vertical Receiver for
use as needed.
REFRIGERATION PROCESS September 1, 1997
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HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Figure 2-4 —Heat Reclaim Valve
Figure 2-5 —Flooding Valve
Figure 2-3 —Turba-Shed
Condenser
Discharge Manifold
Evaporator
Turba-Shed
Suction Manifold
A8
Valve
Liquid Manifold
Evaporator
Pressure
Regulator
Valve Parallel
Compressors
Main Liquid Line
Pressure Differential
Valve
Heat Reclaim 3-Way Valve
Branch Line Solenoid Valve
Receiver
Figure 2-2 —Refrigeration Cycle
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