Circ Water HVAC Flashcards
1
Q
What are the CW pump house ventilation fans auto starts?
A
LOW Speed (30k scfm)
Associated circ. pump is running
AND
Room Temperature > 80ºF
HIGH Speed(60k scfm) OR increase from LOW to HIGH(
Room Temperature > 99°F
Exhaust Fan auto STOPs when Room Temperature <80°F
2
Q
Describe the operations of the CW HVAC SWGR room running fan trip and auto fan pickup.
A
Low flow trip at 12k scfm and the standby fan will pick up. It is bypassed for 20 sec after start to allow starting.
3
Q
Describe operations of the CW HVAC SWGR fan operations.
A
- Fan intake and recirc dampers adjust to
Regulate room temperature (75F) - 1st stage heaters energize at < 62F
- 2nd stage heaters energize at < 60F
4
Q
Describe the interlocks associated with the CW HVAC fans.
A
- Low or high switches cause exhaust fans to run in that speed
- Lower exhaust fans are manual only (via disconnect).
- Pump House Heaters cycle to maintain >40F
5
Q
What are the CW HVAC pump room and SWGR room fan speeds.
A
Pump House exh fans are 2 speed (Auto, Stop, Low, High)
Switchgear Room supply fans Auto/Stop/Run
