Manual

ote: tf interconnect is less then 12_
eta small amount of refrigerant may I
ed to be reclaimed to achieve the I
oper charge for optimal operation. I
viroAir recommends fine tuning us= I
yng the _Superheat" method, j)
Start the indoor unit, cooling mode is
only allowed when the outside ambient
temperature is above 60° F to prevent
damage to the compressor. Unit has a 3
minute time delay before the compressor
start up operation.
The use of the superheat method is highly
recommended for field charging or check-
ing the existing refrigerant charge in a
system that is in the cooling cycle. Because
each installation is different in terms of
indoor airflow, refrigerant line length, etc..,
the factory charge may not be correct
for every application. To assure the best
performance from the air-conditioner, the
refrigerant charge should be checked and
adjusted, if need be, on each installation.
For proper superheat readings, a standard
low=side refrigerant gauge and an accurate
thermometer is needed. A mercury or
stem=type thermometer is not adequate
for suction=line temperatures. We recom=
mend electric thermocouple thermometers
(available at most refrigeration wholesaF
ers); however an accurate remote=bulb
thermometer can be used. When measur=
ing the line temperature, be sure the theF
mometer is securely attached to assure
accurate measurements. The chart below
gives superheat values at various outdoor
temperatures. Allow at least 5 minutes run=
ning time between charge adjustments for
the unit to stabilize.
S
$UPIERHEAT CHARGmhlGCHART
Chart based on 360 to 400 CFM/ton indoor air flow and 66% relative humidity
Use on systems that cool with capillary or piston
5,0
'_ In :loot d, y bulb tempe, ature
450 95_ _ _ _._.
55 60 65 70 75 80 85 90 95 100 105 110 115
',-. OUTDOOR TEMPERATURE °F j