Rheem Raypak MVB 503A Installation And Operation Manual page 2

Revision 6 reflects the following changes:
Some additional metric and Celsius (SI) values added throughout manual in various tables, text, and figures.
Figure 5 and
Table C footer revised on page 8. Figure 6 revised on page 9. Truseal™ Direct Vent Combustion Air, and Ducted Combustion Air
text revised on page 13. Piping text revised on page 15. Mode 1 text revised on page 16. Second Note added on page 16. Mode
2 and Mode 3 text revised on page 17. Second Note added on page 17. WH – Direct DHW Configuration text revised on page
18. Electrical Power Connections text revised on page 20. Wiring the Cascade System Communication Bus, Cascade System
Pump and Sensor Wiring, and Wiring the Optional 0–10 Volt Building Control Signal text revised on page 23. Alarm Connection
text revised on page 24. Vertical Venting (Category IV) text revised on page 26. Common Venting text revised on page 27. Ignition
Control Functions text revised on page 31. Table O revised on page 36. Table P text revised on page 37. Start-Up text revised on
page 42. Lighting Instructions text revised on page 46.
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