Answer Key: Self-Test B-4.2
- a. Pressure
- c. Achieve the design flow for each heat transfer unit or circuit
- c. Stop thermal siphoning
- b. Ensures continuous flow
- d. 12-20 psig
- a. Downstream of the backflow preventer
- c. Prevents contamination of the domestic water supply
- b. Makeup water line
- c. On the boiler
- b. Air out of the system on initial filling
- c. Between 50% and 100% open
