Refrigerant Line Connections - Nordyne C5DA Installation Instructions Manual

5. REFRIGERANT LINE
CONNECTIONS
WARNING:
This coil is pressurized with Nitrogen.
Avoid direct face exposure or contact
with valve when gas is escaping. Al-
ways ensure adequate ventilation is
present during the depressurization
process. Any uncertainties should be
addressed before proceeding.
Note: For coils with factory installed TXV valve
proceed to step #8.
Note: Before proceeding with the connection of
the refrigerant lines, confi rm that the orifi ce size
meets the requirements outlined in the outdoor
unit installation manual. Factory installed orifi ce
sizes are listed in the Specifi cations section. If
the restrictor orifi ce must be replaced, follow
the steps below:
1. Remove the valve cap from the end of the
liquid line. Relieve all pressure from the coil
by depressing the valve. Remove the valve
core. Properly dispose of all removed parts.
2. Loosen the orifi ce body halves by applying
two wrenches and squeezing them together
as shown in Figure 9, to turn the assembly
nut counter-clockwise.
3. Continue to unscrew the assembly nut to
separate it from the distributor body.
4. Insert a light-gauge wire hook between the
distributor body and the restrictor orifi ce to lift
the orifi ce out of the body. (See Figure 10)
Carefully remove the restrictor orifi ce being
careful not to scratch either part.
5. Check the actual size of the new orifi ce. The
size is stamped on its side. Do not use pin
gauges to measure the orifi ce diameter.
6. Insert the new orifi ce in the distributor body,
rounded end down. (See Figure 11)
6
NITROGEN
1
HEALTH
0
FLAMMABILITY
0
REACTIVITY
0 Minimal Hazard 1 Slight Hazard
Figure 7. Downfl ow Furnace with Coil
Cabinet
SMALL
PLATE
LARGE
PLATE
Figure 8. Close-Off Plates (Supplied with
appropriate blower conversion package)
7. After installing the orifi ce in the distributor
body, realign the assembly nut to the
distributor body. Mark a line along both
bodies after hand tightening and then
tighten an additional 1/4 turn. Caution: Do
not overtighten! The misalignment of the two
lines will show how much the nut is tightened.
If a torque wrench is used, tighten to 10-12
ft. lbs. or 14-16 Nm.
8. Remove the valve cap from the end of the
liquid line. Relieve all pressure from the coil
by depressing the valve. Remove the valve
core.
Note: On models which use a TXV, it is
recommended to wrap a wet rag around the
suction line between the sensing bulb and
the line set braze joint before applying any
heat.
9. Unbraze and remove the cap on the suction
line. Unbraze and remove the valve core
holder on the liquid line.
10. Properly dispose of all removed parts.
OFFSET
MOUNTING
HOLE
TABS