Manual 2100-597
Page
2 of 52
CONTENTS
Getting Other Information and Publications
For more information, contact these publishers: .......... 3
General ......................................................................... 4
ANSI Z535.5 Definitions ............................................... 4
I-TEC General Information
I-TEC Model Nomenclature .......................................... 5
Shipping Damage ......................................................... 8
Unit Removal From Skid .............................................. 8
Handling Unit After Removal From Skid ....................... 8
Required Steps after Final Placement .......................... 9
Minimum Installation Height ......................................... 9
Securing Unit to Structure ............................................ 9
Duct Work .................................................................. 16
Supply Duct Connections ........................................... 16
Filters .......................................................................... 16
Condensate Drain ...................................................... 17
With No Vent Option ................................................... 17
With Commercial Room Ventilator ............................. 17
With Energy Recovery Ventilator ............................... 17
Installation Instructions
Mounting the Unit ....................................................... 20
Wiring — Main Wiring ................................................ 20
Wiring — Low Voltage Wiring ..................................... 21
Low Voltage Connections ........................................... 21
S
tart Up
R-410A Refrigerant Required ........................................ 28
Topping Off System Charge ........................................... 28
Safety Practices ............................................................. 28
Description of Standard Equipment ............................... 29
Important Installer Note .................................................. 29
Phase Monitor ................................................................ 29
Three Phase Scroll Compressor .................................... 29
Service Hints .................................................................. 29
Sequence of Operation .................................................. 30
Pressure Service Ports .................................................. 30
Lowering Outdoor Fan Speed for Sound ....................... 30
I-TEC Commercial Room Ventilator System
General Description ................................................... 31
Control Wiring ............................................................ 31
Recommended Control Sequences ........................... 31
Setting the Ventilation CFM Levels ............................ 31
I-TEC Energy Recovery Ventilator System
General Description ................................................... 34
Control Wiring ............................................................ 34
Recommended Control Sequences ........................... 35
Changing Ventilation CFM Rates in Manual Mode .... 35
Changing to Fully Modulating Mode ........................... 35
Configuring Control for ERV Mod. Control ............ 40-42
Maintenance (Gen., Frequency, Clean & Perform.) .. 43 & 44
Troubleshooting
Checking Temperature Sensor ...................................... 45
Troubleshooting ECM™ 142R Motor .................... 46 & 47
Replacing the Motor ...................................................... 47
Troubleshooting Indoor ECM™ Motor .................. 48 & 49
Fan Blade Setting Dimensions ...................................... 50
Refrigerant Charge ........................................................ 50
Figures
Figure 1
Unit Dimensions .......................................... 7
Figure 2A Unit on Lift ................................................... 8
Figure 2B Unit Side ...................................................... 8
Wall Mounting Bracket Location .................................... 9
Bracket Wall Sect. View & Wood Framed Install ........ 10
Center of Gravity ......................................................... 11
Figure 3
Compressor Shipping Bolts ....................... 12
Figure 4
Removal of Air Duct ................................... 12
Figure 5A Ducted Application ..................................... 13
Figure 5B 3" Riser Application ................................... 14
Figure 5C 6" Riser Application ................................... 15
Figure 6
Supply Duct Connections .......................... 16
Figure 7
Filter Location ............................................ 16
Figure 8
Drain Locations ......................................... 17
Figures 9A & 9B Unit Mounting .......................... 18 & 19
Figure 10
Component Location ................................. 20
Figure 11 Basic A/C w/No Vent Pkg. ......................... 22
Figure 12 A/C w/CRV, without CO
2
Control ................ 23
Figure 13 A/C with CRV & CO
2
Control ..................... 24
Figure 14 A/C with ERV, w/o CO
2
Control .................. 25
Figure 15 A/C with ERV & CO
2
Control ..................... 26
Figure 16 HP w/ERV & CO
2
Control (Fully Mod.) ...... 27
Figure 17 CRV Motor Speed/CFM Configuration ...... 32
Figure 18 CRV Speed Change Terminal Access ....... 33
Fig. 19A
ERV Manual Mode "M" Terminal ............... 37
Fig. 19B
ERV Mod. Mode "P" Terminal .................... 37
Figure 20 Ventilation Airflow Diagram ........................ 38
Figure 21 ERV Control Access .................................. 39
Figure 22 Control Board Config./Setting .................... 40
Figure 23 Hub Assembly w/Ball Bearings .................. 44
Figure 24 Control Disassembly ................................. 49
Figure 25 Winding Test .............................................. 49
Figure 26 Drip Loop ................................................... 49
Figure 27 Control Connector Motor Half .................... 50
Tables
Table 1
Factory Built-In Electric Heat Table .............. 5
Table 1A Indoor Blower Performance .......................... 5
Table 2
Elec. Specifications ....................................... 6
Center of Gravity ......................................... 11
Table 3
Operating Voltage Range ........................... 21
Table 4
Wall Thermostats ........................................ 21
Performance & Application Data:
Summer Cooling & Winter Heating ............ 36
Table 5
Temperature vs Resistance of
Temperature Sensor ................................... 45
Table 6
Troubleshooting ECM™ 142R .................... 47
Table 7
Cooling Mode .............................................. 47
Troubleshooting ECM™ Blower Motors ...................... 50
Power Connector ........................................................ 50
Table 8
Pressures: Full Load Cooling ..................... 51
Table 9
Pressures: Part Load Cooling ..................... 52
