Gas Testing - Macurco RD-VRF User Instructions

A Field Calibration Kit, Cal-Kit 1, and one bottle of calibration gas is needed to complete a gas test. These are
available through local distribution or from Macurco.
NOTE: RD-VRF must be tested or calibrated at regular intervals in accordance with local code requirements. It is
recommended to test or calibrate RD-VRF at least annually.
Contents of the Cal-Kit 1
•
Cal-Kit 1 (30-0011-1110-2)
o Calibration Case
o Two feet of Tygon tubing
o 0.2 LPM Gas regulator (F)
Also needed are one of the following gas bottles (Sold Separately):
• Qty 1 R-32 Gas 5,000PPM (37-0662-2134-1) Refrigerant Cal Gas Cylinder 34L 5000 ppm R-32 (M) (For Calibration/Bump Testing)
• Qty 1 R-134A Gas 5,000PPM (37-0562-2134-1) Refrigerant Cal Gas Cylinder 34L 5000 ppm R-134A (M) (For Calibration/Bump Testing)
• Qty 1 R-404A Gas 5,000PPM (37-0672-2134-1) Refrigerant Cal Gas Cylinder 34L 5000 ppm R-404A (M) (For Calibration/Bump Testing)
• Qty 1 R-410A Gas 5,000PPM (37-0692-2134-1) Refrigerant Cal Gas Cylinder 34L 5000 ppm R-410A (M) (For Calibration/Bump Testing)
Cal-Kit 1 Information
Several detectors can be calibrated with one Cal-Kit. The only limitation is the amount of gas in the cylinder. The 17-
liter cylinder has approximately 85 minutes of continuous calibration run time. The gas cylinder should be replaced
when the pressure gauge on the regulator shows 25-psi or less.
Note: For optimum test results it is suggested that the unit be in clean air, green light on, and be in a low ambient air
flow.

6.3 Gas Testing

6.3.1 Testing the Relays
1. Open the Cal-Kit 1. Connect the 5,000ppm gas cylinder to the regulator.
2. Check the pressure gauge on the regulator. If you have 25-psi or less, you will need to replace the gas
canister.
3. Assemble regulator, hose and RD-VRF Test/Calibration Hood and place the Hood over the refrigerant sensor.
4. Turn on the regulator to start the gas flow and wait with the gas applied continuously.
5. When the gas concentration surpasses 1000 ppm relay 1 will activate and when the gas concentration
surpasses 2000 ppm relay 2 will activate.
Note: If the relays do not close within 60 seconds there are three possibilities:
a. Gas cylinder is empty, check the pressure gauge. Replace the gas cylinder if 25psi or less.
b. Unit needs to be re-calibrated (go through recalibration and re-test).
c. If detector needs servicing (return unit to factory for servicing).
6. Remove the gas from the sensor.
REV – 1.0 34-5354-0001-14 15 | P a g e