Reznor PDH Operation Manual PreevA User Manual
Page 2
Form O-PreevA, Page 2
1.0 General
This booklet includes operation, maintenance, and service information. Before begin-
ning any procedure, carefully review the information, paying particular attention to the
warnings. Handling of refrigerant should only be performed by a certified HVAC techni-
cian and in compliance with all codes and requirements of authorities having jurisdic-
tion.
There are warning labels on the unit and throughout this manual. For your safety,
comply with all warnings during installation, operation, and service of this system. See
definitions of Hazard Intensity Levels of warnings below.
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
1.1 Hazard Labels and Notices
1.1 Hazard Labels and Notices ..................................................................2
1.2 DANGER Warnings and Requirements ..............................................3
2.0 Maintenance and Service Information .......................................... 3-6
2.1 Maintenance Schedule .........................................................................4
3.0 Maintenance Procedures ............................................................. 7-30
3.2 Belt, Blower, and Motor - All Models ..................................................7
3.3 Electrical Compartment ......................................................................8
3.4 Gas-Fired Heat Section - PDH, SDH, RDH, RHH, SHH ...................12
3.5 Electric Heat Section - Models PEH, REH ........................................18
3.6 Dampers and Controls ......................................................................19
3.7 Optional Cooling Coil Module ...........................................................20
3.8 Optional Evaporative Cooling Module ............................................27
3.9 Hot Water Heat - applies only to Model PXH or Model RXH
with Option HW2 Hot Water Heat Module .........................................30
4.0 Troubleshooting ......................................................................... 30-37
4.1 Check the Lights on the DSI Integrated Control Module
(Circuit Board) - PDH, SDH, SHH, RHH, and RDH ..........................30
4.2 Troubleshooting - Modulating Control Module used on Model
RDH Sizes 175-400, Model RHH, or Model SHH with Gas
Control Option AG58 or D12G ...........................................................31
4.3 Troubleshooting - Blower Section (All Models - SDH, PDH,
RDH, PEH, REH, RHH, SHH, PXH, RXH) and Gas-Fired Heat
Section (SDH, PDH, RDH, RHH, SHH) ...............................................34
4.4 Troubleshooting - Electric Heat Section (PEH, REH) ......................36
4.5 Troubleshooting - Refrigeration Circuit (All Models with a
DX Cooling Module) ...........................................................................36
APPENDIX ......................................................................................... 38-39
INDEX .......................................................................................................40
Table of Contents