Reznor MAPS III, Cabinet D RECB Users Manual - Manual (Page 2)

Form O-MAPSIII Cabinet D, P/N 222918R9, Page 2
1.0 General This booklet includes operation, maintenance, and service information on the MAPS ® III
Cabinet D Size systems. Before beginning any procedure, carefully review the infor-
mation, paying particular attention to the warnings. Handling of refrigerant should only
be performed by a certified HVAC technician with knowledge of the requirements of
R-410A refrigerant and in compliance with all codes and requirements of authorities
having jurisdiction.
The instructions in this manual apply to the following MAPS
® III models.
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.
Definitions of Hazard
Intensity Levels used
in this Manual
1.0 General ................................................................2
2.0 Maintenance Requirements .......................... 3-5
2.1 Maintenance Schedule ........................................3
2.2 Control Locations .................................................4
2.3 MAPSIII D Cabinet Sizes .....................................5
3.0 Maintenance/Service Procedures .............. 5-21
3.1 Filters ..................................................................5
3.2 Drive Components ...............................................6
3.3 Condenser Fans ..................................................6
3.4 Coil Maintenance .................................................7
3.5 Check Refrigerant Pressure and
Temperatures (subcooling and superheat) .........9
3.6 Compressor Maintenance and Replacement ....10
3.7 Thermostatic Expansion Valves .........................18
3.8 Dampers and Damper Controls .........................19
3.9 Other Controls ...................................................19
4.0 Gas Heat Section Maintenance - Models
RDCB and RDDB ........................................ 21-33
4.1 Heat Exchanger, Burner, and Venter
Maintenance .....................................................21
4.2 Gas Heat Section Controls ................................26
4.3 Gas Train ...........................................................30
4.4 Other Gas Heat Section Controls ......................32
5.0 Electric Heat Section Maintenance -
Models RECB and REDB ........................... 33-34
6.0 Troubleshooting ......................................... 35-42
6.1 Troubleshooting - All Models..............................35
6.2 Troubleshooting the Heat Section .....................36
INDEX ......................................................................43
REFERENCES .......................................................44
Table of Contents
Model Description
RCB Makeup Air Cooling Packaged System, 5200-13000 CFM
RDCB
Makeup Air Cooling Packaged System, 5200-13000 CFM, with Gas
Heat Section (500-1600 MBH)
RECB
Makeup Air Cooling Packaged System, 5200-13000 CFM, with
Electric Heat Section (120 & 180 kw)
RDB
Makeup Air Cooling and Re-heat Pump Reheat Cycle Packaged
System, 5200-13000 CFM
RDDB
Makeup Air Cooling and Re-heat Pump Reheat Cycle Packaged
System, 5200-13000 CFM, with a Gas Heat Section (500-1600 MBH)
REDB
Makeup Air Cooling and Re-heat Pump Reheat Cycle Packaged
System, 5200-13000 CFM, with Electric Heat Section (120 & 180 kw)
NOTE: To confirm that this
booklet is applicable, see
list of D Cabinet Sizes in
Paragraph 2.3, page 5.
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.