16
AHU EXPANSION KIT
Leakage and vacuum test
- Add the accurate amount of refrigerant after the calculation.
- If the amount of refrigerant is not accurate, it can cause problems to the product.
- If the additionally inserted amount of refrigerant exceeds ±10%, the compressor can be
burnt and the indoor unit can underperform.
n
Pipe to vacuum: Gas pipe and liquid pipe
n
When moving the product to a different location, do not charge a different
refrigerant than the regulated refrigerant (R410A).
n
If other refrigerant is mixed to the original refrigerant, it can cause a malfunction in
the refrigerant cycle to cause damages.
n
As the refrigerant composition of R410A changes when inserted in gas condition,
always insert the refrigerant in liquid condition.
CAUTION
1. After removing the cap nut, turn the stem clockwise to increases superheat / decreases
refrigerant flow.
2. Superheat change per 1 turn of adjustment stem according to the evaporator temperature.
* Factory setting on preset valves is 9°F / 5°C static superheat.
* Even if the superheat adjustment, system operates according to the logic to meet the target low
pressure.
Superheat Adjustment
Evaporator Temperature
+32°F / 0° C
+41°F / +5° C
Superheat change / turn
2.52°F / 1.4°C
2.16°F / 1.2°C
Counter-Clockwise
increase SH
Clockwise
decrease SH
stem
cap nut
<View of Adjustment Stema>
Summary of Contents for PATX13A0E
Page 18: ...18 AHU EXPANSION KIT ...
Page 19: ......
