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EC Series Heat Pumps — 8733841499 (2024/05)
Table of Contents
1 Document Conventions................................................4
1.1 Key to Symbols...............................................4
1.2 General Safety Instructions...............................4
2 Model Nomenclature....................................................7
3 General Description.....................................................8
4 Inspecting and Storing the Equipment...........................9
4.1 Moving and Storage.........................................9
4.2 Initial Inspection .............................................9
4.3
Inspection and Unpacking Prior to Installation .....9
5 Unit Installation.........................................................10
5.1 Location Selection.........................................10
5.2 Minimum Conditioned Room Area....................11
5.3
Protecting the Unit During Construction ...........12
5.4
Take-Apart Construction Option......................12
5.5
Mounting Vertical (VT) Units ...........................12
5.6
Mounting Horizontal (HZ) Units .......................12
5.7
Condensate Drain .........................................12
5.8
Duct System.................................................13
5.9
Piping..........................................................13
5.1
0 Electrical—Power Supply Wiring ......................15
5.1
1 Electrical—Low-Voltage Wiring ........................16
5.1
2 Charging the Refrigeration Circuits (for Units with
Tak
e-Apart Construction Only)....
....................18
6 Specific Application Considerations............................19
6.1 Well Water Systems.......................................19
6.2 Cooling Tower/Boiler Systems ........................20
7 Water-Quality Considerations ....................................21
8 Post-Installation System Checkout .............................23
9 Pre-Start-Up..............................................................23
9.1 Checking Pulley Alignment and Belt Tensioning .23
9.2 Checking Scroll Compressor Rotation ..............23
9.3
Operating Limits ...........................................23
10 Start-up ....................................................................24
10.1 Unit Start Up Cooling Mode.............................24
10.2 Unit Start Up Heating Mode ............................24
11 Commissioning..........................................................24
12 Safety Devices and the UPM Controller Overview ........25
12.1 First-Stage UPM Board...................................25
12.2 Second-Stage UPM Board ..............................26
12.
3 UPM Default Settings and DIP Switch Positions .28
12.
4 UPM Board Features......................................28
12.
5 Leak Detection System ..................................30
13 Unit Sequence of Operation by Mode ..........................31
13.1 Cooling Mode ...............................................31
13.2 Heating Mode ...............................................31
14 Factory-Installed Options...........................................32
14.1 Flow Proving Switch (DPS).............................32
14.2 Boilerless Control ......................................... 32
14.
3 Variable Frequency Drive (VFD) ...................... 32
14.
4 Phase Monitor .............................................. 32
14.
5 Hot Gas Reheat (HGRH)................................. 32
14.
6 Modulating Hot Gas Reheat (MHGRH) .............. 32
14.
7 Hot Gas Bypass ............................................ 33
14.
8 Economizer.................................................. 33
15 Maintenance............................................................. 34
15.1 Filter Changes .............................................. 34
15.2 Annual Checkup ........................................... 34
15.
3 Annual Condensate Drain Cleaning.................. 34
15.
4 Blower Motor Lubrication (Optional)................ 34
15.
5 Handling Periodic Lockouts ............................ 34
15.
6 Installing Fan Motor Sheaves .......................... 34
15.
7 Pulley Alignment and Belt Tensioning Procedure 35
16 Servicing and Repair Information ............................... 36
16.1 Confined Space Work.................................... 36
16.2 Controlled Work Procedure ............................ 36
16.
3 Safety Checks .............................................. 36
16.
4 Checks to Electrical Devices ........................... 37
16.
5 Repairs to Sealed Components ....................... 37
16.
6 Repair to Intrinsically Safe Components ........... 37
16.
7 Check Cabling .............................................. 37
16.
8 Detection of Flammable Refrigerants ............... 37
16.
9 Removal and Evacuation ................................ 37
16.
10 Charging Procedures..................................... 38
16.
11 Recovery ..................................................... 38
17 Decommissioning Information.................................... 39
17.1 Protecting the Environment............................ 39
17.2 Decommissioning Procedure.......................... 39
17.
3 Labeling ...................................................... 39
18 Troubleshooting........................................................ 40
18.1 Unit Troubleshooting..................................... 40
19 Specification Tables .................................................. 47
19.1 Blower Performance Table ............................. 47
19.2 Operating Temperatures and Pressures Table ... 49
19.
3 Water-Side Pressure Drop Table ..................... 55
20 Wiring Diagrams for Single-Phase Units...................... 57
20.1 Two-Stage, Single-Phase Standard Unit with Belt-
Drive Motor.................................................. 57
20.
2 Two-Stage, Single-Phase Unit with Optional
Compo
nents and Belt-Drive Motor....
............... 58
20.3 Two-Stage, Single-Phase Unit with DDC, Optional
Compo
nents, and Belt-Drive Motor....
.............. 59
20.4 Two-Stage, Single-Phase Unit with Dual-Point
Pow
er and Belt-Drive Motor....
........................ 60
20.5 Two-Stage, Single-Phase Unit with Dual-Point
Pow
er, Optional Components, and Belt-Drive
Motor.
......................................................... 61
20.
6 Two-Stage, Single-Phase Unit with Dual-Point
Pow
er, DDC, Optional Components, and Belt-Drive
Motor.
......................................................... 62
21 Wiring Diagrams for Three-Phase Units....................... 63
21.1 Two-Stage, Three-Phase Standard Unit with Belt-
Drive Motor.................................................. 63
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