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3
JOHNSON CONTROLS
FORM 100.50-NOM6 (1207)
Example:
The suction pressure is 130 PSIG and the
suction line temperature is 57 °F
Suction Line Temperature
= 57°F
Saturation Temperature for 130 PSIG
= 45°F
Evaporator Superheat
= 12°F
When adjusting the expansion valve, the adjusting
screw should be turned not more than one turn at a time,
al low ing suf fi cient time (ap prox i mate ly 15 min utes)
be tween ad just ments for the system and the ther mal
ex pan sion valve to re spond and stabilize.
The superheat setting should be adjusted to 12°F at
design conditions.
Leak Checking
Leak check compressors, fi ttings and piping to assure
no leaks. Verify the evaporator distributor tubes do not
have bare copper touching each other or are against a
sheet metal edge. If you are leak checking a unit charged
with R-410A make sure the leak test device is capable
of sensing refrigerant R-410A.
If the unit is functioning satisfactorily dur ing the
ini tial op er at ing period, no safeties trip and the unit
controls are functioning prop er ly, the roof top unit is
ready to be placed into operation.
Summary of Contents for ECO2 YPAL 050
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Page 113: ...113 JOHNSON CONTROLS FORM 100 50 NOM6 1207 6 ECONOMIZER EXHAUST LD13018...
Page 114: ...114 JOHNSON CONTROLS FORM 100 50 NOM6 1207 User Interface Control Center FANS LD13019...
Page 115: ...115 JOHNSON CONTROLS FORM 100 50 NOM6 1207 6 COOLING SETUP LD13020...
Page 117: ...117 JOHNSON CONTROLS FORM 100 50 NOM6 1207 6 HEATING SETUP LD13022...
Page 119: ...119 JOHNSON CONTROLS FORM 100 50 NOM6 1207 6 SYSTEM OPTIONS LD13024...
Page 121: ...121 JOHNSON CONTROLS FORM 100 50 NOM6 1207 6 INPUTS COMFORT DEMAND VENTILATION LD13014 LD13026...
Page 125: ...125 JOHNSON CONTROLS FORM 100 50 NOM6 1207 6 ALARMS LD13031...
