ELECTRICAL
OUTPUT POWER CAPACITY AT PDU
480/277v to 415/240v
Where is superheat measured and why?
Superheating process ensures refrigerant is in a gas state as it exits evaporator
NAC PANEL DEFINE AND WHAT IT DOES
Notification Appliance Card Panel
•
Communication circuit that performs the preset functions of the fire system
What is the purpose of the CO2 sensors and where can the ybe found?
Ensures proper ventilation of high occupancy spaces
•
Found in conference room and other areas with high occupancy
8. What is the process of resetting a locked in alarm?
Stop -> Reset -> Auto
How MFRs and PLC work together to provide protection to the electrical system in the event of harmful power conditions
MFRs monitor and retrieve data, communicating this information to the PLC. (“hands”)
•
The PLC then makes automatic decisions based on this data. (“brain”)
TES operational modes of a XDM unit. Give a brief overview of reach mode.
Normal mode
Discharge mode
Recharge mode
Valves for Pre action
Solenoid valve
•
Releases priming pressure
•
Activated during cross-detection
•
Deluge Valve
•
Held closed by the priming pressure
•
Allows water to the sprinkler piping once both conditions are met (cross-detection, loss of air pressure)
•
Shut-off Valve
•
Used for testing the system
•
Water Supply Control Valve
•
Manually shuts off the pre-action system by preventing water flow
Define and describe PBB as it pertains to the site
•
PBB - Power Base Building
•
Non-critical spaces (offices, hallways, telecommunication & network rooms)
Describe the various modes of operations for the generators on site.
Auto – normal operations
Run – running generator without load transfer
Stop – shuts down after completing cooldown cycle ***Note that in this mode, generator will not run even if PLC commands it to do so
E-Stop – immediately stops the generator from running. ***Note that in this mode,
LIST PANELS AND GENERAL LOAD FOR EACH PANEL.
X
Setpoints for XDM, and where is the demarcation point?
Return: 96 F
Supply: 77 F
The valves before the customer CDU is the demarcation point.
Describe the water flow path through the fire system.
Utility water -> Water Entry Room -> Fire Riser -> Pre-Action Cabinets -> Sprinklers
6. Define and describe the function of an EMR, to include location.
Elevator Machine Room
•
Houses support equipment for elevators
•
Located on 1st floor
11. Define GCB and describe its function.
Generator Control Board
Isolation point for generator input, connection point for load bank.
PLC SET POINTS
LC timing set-points
•
1 sec. – Primary Generator Source Available
•
2 sec. – Critical Voltage Failure (Utility and Gen)
•
1 sec. – Undervoltage (Utility and Gen), Open Transition
•
30 sec. – Generator failed to start
•
5 minute – Generator cooldown
•
30 minutes – Utility restoration
COMPONENETS OF AN RTU (9)
AIR INTAKE EXHAUST MOTOR EVAP COILS CONDENSOR FANS SUPPLY AIR DUCT HMI CONDENSOR COILS BLOWER RETURN AIR DUCT
Explain the different types of fires extinguishers and what type of fires they are used for.
Class A – Ordinary Combustibles
•
Solids, not metal
•
Class B – Flammable Liquids or Gases
•
Grease, tar, alcohols, flammable gas
•
Class C – Electrical
•
Energized equipment
•
Class D – Metal
•
Magnesium, titanium, sodium
•
Class K – Cooking Oils
•
Animal and vegetable oils, fats
What components can be found inside of a DLR IDF room? What IDF equipment needs to be maintained?
BMS and Security racks
•
UPS for that specific room
What 3 conditions must be met before the SCR system activates?
Generator must be running
Generator must be carrying at least 40% of the load
SCR Temperature is above 575˚F
DRAW A DOUBLE CONVERSION UPS
X
iCom- Cooling Unit Statues (6)
UNIT ON – Operating normally without alarms or warnings
WARNING ON / ALARM ON – Warning or alarm present, still in operation
STANDBY – unit is not in operation but ready for it to turn on if needed (typically units are on standby via a rotation)
ALARM STANDBY – unit is not in operation due to a present alarm
DISpLAY OFF – unit is turned off (intentionally from iCOM display)
BACKDRAFT – unit is not in operation but EC fans are operating as a backdraft tamper (allows airflow in one direction and prevents reverse airflow)
Describe a Hot Work Permit, to include:
a. Responsible Party
b. Required Information
•
Operations team – fills out permit, distributes to vendor, and collects upon work completion
c. When they are needed
•
Name of contractor, date, change request #, location of work, what work is performed, parties involved, signature
•
before any temporary operation involving open flames or producing heat and/or sparks, such as welding, cutting, brazing, or grinding, can begin
FPT set-point
FPT set-points are dependent upon the space itself
a. List major 480/277v loads
Jacket water heats, transformer to LV loads