1. Factory Options, Accessories & Economizers

2. Commercial Accessory Review

3. Serial Number Review
The first two characters of the serial number are necessary when ordering LP kits.

4. Model Number Review

5. RKNL-C series are DDC or Communicating Units

6. Factory Option Codes

7. Field Installed Accessory Selection

8. Impact of Energy Issues on Economizers
Economizers Yesterday
Save money by utilizing free outside air instead of mechanical equipment
Provide ventilation with demand control ventilation
No direct feedback of operation or fault detection
Controllers today
More complex control requirements for additional energy savings
Simplified diagnostics and verifiable operation
Traceable operation and maintenance
Meet CA title 24, ASHRAE and ICC codes and standards
64% Installed Rooftop Economizers Do Not
Work!

9. Economizers
Normal Operation

10. Economizers
Economizer Operation

11. Economizers Horizontal Downflow Downflow Configurations Only
Fully Modulating – Allow 100% outside air
Horizontal
Downflow
Shipped As Single Enthalpy
Factory Installation Available
Downflow Configurations Only
Cost is the Same
No Additional Cost for Installation
Longer Lead Time
Plug – n – Play
Large Units
Small Units
Field Configured
RRNL, RRPL, RRRL, etc.

12. Economizers

13. Smoke Detectors Economizers Smoke Detector
Factory Installed only in Economizer
D4120 in Rheem Replacement Parts
If Field installing, Need Sampling Tube
RSI 60-SMK-01WH

14. Economizers Dual Enthalpy Separate Item Field Installed Smoke Detector
Installed Option
Not Field Installed

15. Backward Compatibility  Forward to Meet New Standards

16. W7220 Economizer Interface
Terminal Options

17. W7220 JADETM Economizer Controller
Information:
STATUS
SETPOINTS
SYSTEM SETUP
ADVANCED SETUP
CHECKOUT
ALARMS
2 LINE LCD
16 CHARACTERS/LINE
MENU UP (EXIT)
BUTTON
SCROLL(UP/DOWN)
BUTTONS
SELECT (ENTER)
BUTTON

18. Economizer System Sensors
New Accurate Sensors

19. New Economizer Sensors
3 position DIP
switch
C7250A
20k temperature
sensors
C7400S
Sylkbus
Two sensors – color coded to match label on module

20. Economizers CO2 Sensor Molex Plugs 9 Pin to 12 Pin Adapters
Separate Item
Field Installed
Wall Mounted
Duct Mounted Available
Ordered from Honeywell
Molex Plugs
9 Pin to 12 Pin Adapters

21. Power Exhaust Field Installed
Most Applications with RA Duct Static Greater Than 0.2” w.c.
Only For Use With Economizers
Notes:
Economizers include Barometric Relief damper, which is installed.
Dampers have rubber seals that minimize air leakage in off cycle, but also attenuate damper blade noise.
Barometric Relief Damper

22. Fresh Air Dampers Low Cost Alternative to Economizers
Manual Damper – allows 50% outside air
Fixed Blade
Motorized Damper – allows 50% air
Open During Occupied Mode
Some Are Complete Kits
Some Are Motor Added to Manual Damper
Not For Use With Economizers or Power Exhaust
Downflow or Horizontal Applications

23. Roof Curbs RXKG-CAE14 14” Height RXKG-CAE24 24” Height
Factory Sloped Curbs
Residential Heat Pumps
Not For Sloped Roof
3rd Party for Sloped Applications
Curb Adaptors – Listed in Spec Sheets
For Previous Generation Rheem/Ruud Only
Other Adaptors Available From Third Party Vendors

24. Hail Guards Standard 12 ½ Ton “Designed Out” on Large Units
Slope Coil Design
No Longer Necessary
Optional
10 Ton and below

25. Heat Exchangers Aluminized Steel 10 Year Warranty Stainless Steel
Optional
Good Value
20 Year Warranty
Commercial Application
Three Phase
Lifetime
Residential Application
Single Phase

26. Other Accessories High & Low Pressure Control
Standard
Unwired Convenience Outlet
Optional on All Units
Requires Separate Power Source
Unfused Service Disconnect
Gas/Electric Only
Not Available for Heat Pumps or Package A/C

27. Sources for Coating Coils
Other Accessories
Sources for Coating Coils
AERO-MARINE Engineering OR AME.
T. Dennis Sutherland ---- Bryson, Texas – Technicoat.
Thermo Guard located in Houston TX –
BLYGOLD HVAC Corrosion Protection – FL.
Contact – Bill Herrera at
Prostock Parts in North Carolina also carries part number
in a spray can for coating coils for salt air protection.
All correspondence is between the Distributor and Coil Coater.
Not the Factory.

28. Application Notes
Ruud products are designed for human comfort and can be used for other conditioning needs
Units are not designed as “make-up air” units or for hostile environments
Hot Gas Reheat and VFD Currently Available

29. Additional Notes
When installing a package unit on a roof curb remove shipping material from under the unit
Prior to start-up remove shipping blocks from under the compressor. Failure to do so may result in transmitted noise
Economizer sheet metal hoods and screens are shipped inside the unit for protection. Some parts have subtle differences. Identify all parts prior to assembly
Electric Heater kits for Package Heat Pumps and Package Cooling units are not the same kits that are used in residential air handlers

30. Additional Notes KEEP THE ECONOMIZER PLUG
This is a must for diagnostic procedures in the future
All Accessory Model Numbers begin with RX (Green) / AX (Gray)
For example, RXRD = AXRD except the color
Residential Package Economizers are the same for Horizontal or Vertical installation
When Installing an Economizer/Hoods
Two scratch awls come in mighty handy
Layout everything before starting

31. Questions?