10
Unitary Products Group
035-17393-000 Rev. A (0501)
COPPER
2 SCREWS
CORNER
POST
SERVICE PORTS IN SHIPPING POSITION
UNIT WALL
SIDE VIEW
COPPER
TUBE
UNIT
WALL
COPPER
2 SCREWS
CORNER
POST
TOP VIEW
UNIT
WALL
LOOSEN
SCREWS
SIDE VIEW
(AS SHIPPED)
PUSH SERVICE
PORTS THROUGH
CORNER POST
TIGHTEN SCREWS
SIDE VIEW
SERVICE PORTS
EXTENDED
(
)
SERVICE PORTS
EXTENDED
(
)
SERVICE PORTS IN INSTALLED POSITION
FIG. 6 - EXTENDING THE SERVICE PORTS
Alternate Charging Methods
If you are starting a unit when the ambient temperature is higher
or lower than those shown in Fig. 7, either of the following meth-
ods may be used.
Method 1: Determine the total weight of the refrigerant for the
total system by adding the required charge for the
outdoor unit, the indoor unit and the refrigerant
lines using information in Tables 2 (Physical Data)
and 6 (Refrigerant Line Charge).
Using the charging procedures outlined above, weigh the re-
quired amount of refrigerant charge into the unit.
Method 2: Install a field supplied moisture indicating sight
glass in the liquid line between the filter-drier and
the evaporator coil.
Using the charging procedure outlined above,
charge refrigerant until the moisture indicating sight
glass is clear. Add approximately 1 extra pound of
refrigerant for the 090 and 120 or 3 extra pounds for
the 150 to assure a liquid refrigerant seal at the ex-
pansion valve under all operating conditions. Block
the flow of the condenser air, if necessary, to assure
a head pressure of 280 psig during the charging
procedure.
Note:
The installer should return to the job to verify the op-
erating charge when the ambient temperature is
within the conditions shown in Fig. 7 or 8 as applica-
ble.
