0 general, 1 cautions and warnings – Reznor YDSA Unit Installation Manual User Manual
Page 2
Form I-Y, P/N 273646R6, Page 2
1.1 Cautions and Warnings
There are warning labels on the unit, on the front page, and throughout this manual.
For your safety, comply with all warnings during installation, operation, and service of
this system. Definitions of the hazard intensity levels of the cautions, warnings, and
dangers are shown below.
1.0 General
HAZARD INTENSITY LEVELS
1. DANGER: Failure to comply will result in severe personal injury or
death and/or property damage.
2. WARNING: Failure to comply could result in severe personal injury
or death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury
and/or property damage.
Definitions of Hazard
Intensity Levels used in
this Manual
1.0 General .........................................................2
1.1 Cautions and Warnings ................................... 2
1.2 General Information ........................................ 3
1.3 Warranty ......................................................... 3
1.4 Installation Codes ........................................... 3
2.0 Location and Moving ...................................3
3.0 Receiving, Shipped Separate and Storage .
Loose Parts ..................................................... 4
3.3 Storage ........................................................... 6
4.0 Clearances and Dimensions .......................6
4.1 Clearances ..................................................... 6
4.2 Dimensions .................................................... 7
5.0 Mounting .....................................................10
5.1 Unit Weights.................................................. 10
5.2 Curb Cap Base and Mounting ...................... 10
5.3 Mounting on a Roof Curb ............................. 10
5.4 Rigging and Lifting ........................................ 19
6.0 Mechanical .................................................20
6.1 Install Hood(s) ............................................... 20
6.2 Duct Connections and Duct work ................ 22
6.3 Cooling Section Condensate Drain .............. 22
7.0 Electrical and Wiring .................................23
7.1 General ......................................................... 23
7.2 Supply Wiring................................................ 23
7.3 Wiring Diagram, Unit Wiring Requirements, and
Optional Convenience Electrical Outlet ......... 25
7.4 Electrical Compartment - Control Locations . 26
7.5 Control Wiring ............................................... 27
7.6 Supply Fan with Variable Frequency Drive .. 31
7.7 Condenser Fan Motors and Fans ................. 31
7.8 Compressors ................................................ 31
8.0 Controls ......................................................32
8.1 System Controller ......................................... 32
8.2 Supply Fan Control ....................................... 33
8.3 Other Optional Controls ................................ 34
9.0 Optional Equipment including Heat
Sections ......................................................35
9.1 Inlet Air and Exhaust Air Options .................. 35
9.2 Gas Heat Section .......................................... 37
9.3 Electric Heat Section .................................... 58
10.0 Commissioning and Startup ...................59
10.1 Preparation and Startup Requirements ...... 59
10.2 Checklist Prior to Startup ............................ 59
10.3 Unit Test Mode and Setting Fan CFM ......... 60
10.4 Other Control Settings ................................ 64
10.5 Checklist - Startup ...................................... 66
10.6 Checklist After Startup: ............................... 67
Appendix ..........................................................68
Cabinet Size 1, 2 or 3 by Model and Model Size
Cross-Referenced to Heat Section Size and Type
Wiring Diagram Option Identification .................. 68
Supply Fan Airflow (cfm) / Pressure Drop (iwc) Tables
by Fan and Unit Size ..................................... 69
PE4 Airflow (cfm) / Pressure Drop (iwc) Tables by Fan
and Unit Size ................................................. 71
PE5 Airflow (cfm) / Pressure Drop (iwc) Tables by Fan
and Unit Size ................................................. 72
PE6 Airflow (cfm) / Pressure Drop (iwc) Tables by Fan
and Unit Size ................................................. 73
Start-Up Information Form .................................. 74
References ......................................................... 75
Index .................................................................75
INSTALLATION RECORD - to be completed by
the installer: .................................................76
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