Hvac Component Start Up

HVAC (Heating, Ventilation and Airconditioning) component start-up procedures describe how to start the operation of each component. They specify the methods to be used and the checks that are needed. Start-ups and related measurements are carried out by the contractor. Commissioning provider assists the contractor in the beginning of each start-up process and reviews that no systematic errors are made.

As an example, the following components or systems need to be started:

Most of the start-ups also require measurements. The contractor must have sufficient measuring devices to carry on tests (Table below). Accuracy of each measuring device shall be good enough and the measurement range sufficient to the measured level. It is also important to have each measuring device calibrated less than one year ago. The contractor shall incorporate equipment type, accuracy, measurement range and calibration certificate of each measuring device as part of startup reports.

All measurement data shall be recorded using the template specified in the commissioning plan. After the start-up measurements of each equipment or subsystem, the contractor gives all reports for Cx provider, who provides a start-up review report to a client.

Object	Measurement device	Measurement
Air flow rate	Vane anemometer	Velocity in AHU filter section or grille
	Hot wire anemometer	Velocity inside duct
	Pitot tube and manometer	Pressure difference in duct
	Capture hood & manometer	Air flow rate of grille or diffuser
Air velocity	Hot wire anemometer	Velocity of air
	Vane anemometer	Velocity of air (>0.5 m/s)
Ductwork leakage	Duct leakage tester	Static pressure inside ductwork
Pressure of air	Pressure manometer	Differential pressure in ductwork or e.g.
	(Barometric) pressure meter	Atmospheric pressure
	Pressure difference data logger	Continuous pressure difference recording
Pressure of water	Hydronic manometer	Differential pressure
	Pressure data logger	Continuous pressure recording
Water flow rate	Hydronic manometer	Pressure across control valve
	Digital flow rate meter	Water flow rate
Temperature	Thermometer	Liquid or air temperature
	Hot wire anemometer	Air temperature (dry bulb)
	Surface temperature meter	Surface temperature
	Infrared temperature meter	Surface temperature
	Thermal imaging camera	Surface temperature
	Sling psychrometer	Wet/dry bulb temperature
	Temperature data logger	Continuous temperature recording
Humidity	Hygrometer	Absolute and relative humidity
	Sling psychrometer	Dew point
	Relative humidity meter	Relative humidity
Indoor air quality	Carbon dioxide meter (NDIR)	CO 2-level of air
	Carbon monoxide meter (NDIR)	CO-level of air
	Particulate meter (gravimetric, light-    scattering or beta-attenuation)	Particulate mass concentration and/or    particulate count
	Photo-ionization detector (PID)	fVoarrimoaulsd eVhOyCdse like TVOC and
	Electro-chemical sensor	Various gases like SO 2, NO2, O3
	Andersson active air sampler withpetri dish	Total Fungal and Bacterial Count
Refrigeration	Vacuum gauge	Refrigerant system vacuum
	Refrigerant leak detector	Refrigerant leakage
	Refrigeration manifold	Pressure difference in pipe
Filter leak testing	Aerosol photometer and generator	tCoo cnhdietciok nins sotfa ltlhatei oHnEPA filter as well as
Sound	Sound level meter	Sound pressure levels in octave bands,
Fan operation	Tachometer	RPM of rotating objectives
Energy and power	Plug-load meter	Power consumption of device
	Clamp meter	Voltage and current
	Electricity multi-meter	Voltage, current, resistance

HVAC COMMISSIONING GUIDEBOOK  - Maija Virta  ((M.Sc.Eng) is the Founder Director of the Santrupti engineers Pvt Ltd. She has over 30 years of experience in construction and HVAC-industry around the world)