heat tubes below the surface. Perpendicular to the outside wall, you should find rising and falling
temperatures at equal distances. High temperatures indicate you are scanning a heat tube beneath
the floor surface, low falling temperatures indicate a space between the heat tubes.
1. Press SET and then press
2. Press MODE to select MAX.
3. To locate radiant heat tubes in floor, temporarily elevate the loop temperature to create
hotter spots for identifying tubing runs.
4. Before releasing trigger, press MODE to toggle between MIN, MAX, DIF floor temperatures
and record the temperature for future comparison and trending under similar conditions.
MEASURING GRILLE, REGISTER, OR DIFFUSER DISCHARGE TEMPERATURE
1. Press SET and then press
2. Aim the Thermometer at the discharge air grille, register, or diffuser.
3. Measure discharge temperature.
4. Release trigger to freeze the temperature reading for 8 seconds and record this temperature.
5. Grille, register, or diffuser temperature should be equivalent to discharge temperature at the air
handler.
CHEKING FOR BLOCKAGE IN AIR-TO-AIR EVAPORATORS OR CONDENSERS
1. Remove panels to gain access to coil return bends or hairpins.
2. Press SET and then press
3. Start the refrigeration system.
4. Aim the Thermometer at coil turn bends/hairpins.
5. Start recording temperature.
6. Take temperature of each return bend/hairpin.
- All evaporator return bends/hairpins should be at or slightly above evaporator saturation
temperature from the pressure/temperature chart.
- All condenser return bend/hairpins should be at or slightly less than condenser saturation
temperature.
- If a group of return bends/hairpins do not conform to expected temperatures, that indicates a
blocked or restricted distributor or distributor tube.
/
to select relatively high emissivity.
/
to select relatively high emissivity.
/
to select relatively high emissivity for copper tube.
33