Grandaire 4860 - Subcooling Charging and Refrigerant Adjustment

16
14.2 Subcooling charging and refrigerant adjustment in cooling (above 55 F outdoor temp.)
STEP 1 - Check the outdoor ambient temperatures.
STEP 2 - Ensure Sections 7, 8, 9, 10, and 13 have
been completed.
STEP 3 - Initiate charge mode and stabilize system.
After starting the system in cooling mode, short press
“FORCE”button, and “┣” symbol appears in 10 minutes,
operate the system for a minimum of twenty (20) minutes.
20 MIN.
55 ºF
80 ºF
70 ºF
Outdoor Temp1
Indoor Temp
120 ºF
55 ºF
Outdoor Temp2
Important: After twenty (20) minute stabilization
period, maintain continuous operation while adjust-
ing refrigerant charge or TXV, after which operate
system for a minimum of five (5) minutes for system
to stabilize, otherwise repeat step 3.
Subcooling (in cooling charge mode) is the only recom-
mended method of charging above 55ºF outdoor ambi-
ent temperatures.
For best results the indoor temperature should be kept
between 70ºF to 80ºF.
For outdoor ambient temperatures below 55ºF , use
weigh-in charge method.
Note:It is important to return in the spring or summer to
accurately charge the system in the cooling mode when
outdoor ambient temperature is above 55ºF.
Outdoor
Temperature
Above 55ºF
Outdoor
Temperature
Below 55ºF