York E1FB240 - Manual (Page 10)

10 Unitary Products Group
035-16192-001-A-1001
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. 5 - 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 Figures 7 through 15,
either of the following methods 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 refrig-
erant lines using information in Tables 2 (Physi-
cal Data) and 6 (Refrigerant Line Charge).
Using the charging procedures outlined above,
weigh the required 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 2 extra
pounds of refrigerant to assure a liquid refrigerant
seal at the expansion 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 operat-
ing charge when the ambient temperature is within the
conditions shown in Figures 7 through 15.