6
−
7
T-364
6.10 CONDENSER COIL
The condenser coil consists of a series of parallel cop-
per tubes expanded into copper fins and formed into a
“C“ shape with the fourth side of the square formed by
the side support bracket.
6.10.1 Condenser Coil Cleaning
To ensure optimal efficiency of the unit the condenser
coil must be clean. The condenser coil should be
cleaned at least once a year, but more frequent cleaning
may be required depending on operating conditions.
The coil is cleaned with fresh water sprayed in the re-
verse direction of the air flow to remove any debris from
the coil. A high pressure washer is not required, mains
water pressure is sufficient. To clean the condenser coil
perform the following procedure:
WARNING
Do not remove the condenser fan grille
before turning power OFF and disconnect-
ing the power plug.
a. Make sure the unit is powered off and the plug is dis-
connected.
b. Remove the condenser fan grille.
c. Starting from the top of the coil, use a water hose with
a nozzle to wash the coil from the inside out.
d. Systematically wash across the inside top face of the
coil until the water runs clean.
e. Wash down the center section, and then through the
bottom of the coil, continue washing until the water
runs clear.
f. After the coil is clean, rinse the condenser fan to re-
move any dirt build up from the blades.
g. Replace the condenser fan grille ensuring that it is
centered around the fan.
6.10.2 Condenser Coil Removal
a. Using a refrigerant reclaim system remove the refri-
gerant charge.
WARNING
Do not remove the condenser fan grille
before turning power OFF and disconnect-
ing the power plug.
b. Remove the condenser fan grille, retain all bolts and
washers for reuse.
c. Remove the condenser fan.
d. Remove the infill panels to the left and right of the con-
denser fan shroud.
e. Remove the condenser fan shroud.
f. Unplug the condenser fan motor.
g. Remove and retain sufficient putty from around the
motor wire harness to allow the harness to be slid
back through the side support bracket.
h. Cut the top and bottom drain lines midway between
the side support bracket and the first cable tie, approx
150mm (6”) from the side support bracket.
i. Remove and retain sufficient putty from around the
drain lines to allow the tubes to be slid back through
the side support bracket.
j. Remove filter drier.
k. Unbraze the inlet connection to coil.
l. Remove the cushion clamps securing the liquid line to
the top and bottom receiver brackets, retain all
clamps and securing hardware.
m. Place a support under the condenser coil before re-
leasing the coil from the frame.
n. Remove the lower mounting bracket bolts from the in-
side of the coil.
o. Remove the top mounting bracket bolts and grille ex-
tension mount from inside the coil.
p. Remove the side support bracket mounting bolts.
q. Slide the condenser assembly with receiver out of the
unit.
6.10.3 Condenser Coil Preparation
Before installing the new condenser coil, the receiver
assembly and mounting hardware must be removed
from the old coil assembly:
a. From the old coil, unbolt the receiver assembly from
side support bracket.
b. Unbraze the receiver assembly from the coil outlet
line and remove from the coil assembly.
c. Unbolt the side support bracket from the top and bot-
tom coil supports and remove from old coil.
d. Refit the side support bracket to the new coil ensuring
that the top and bottom are flush mounted with the coil
support.
e. Insert the receiver pipe work onto the coil outlet and
loosely secure the receiver assembly to the side sup-
port bracket with the retained hardware.
f. Braze the outlet connection to the receiver assembly.
6.10.4 Condenser Coil Installation
Once the receiver and mounting hardware have been
secured to the new condenser coil, the entire assembly
is ready to be installed into the unit:
a. Slide the new condenser coil into place ensuring the
coil inlet connection is mated to the pipework and that
the coil is fully supported.
b. Secure the condenser coil into the unit using the re-
tained hardware; refit the mylar and fender washers:
1. Refit the side support bracket bolts.
2. Refit the top support bracket bolts as well as the top
grille extension support.
3. Refit the bottom support bracket bolts.
c. Braze the condenser coil inlet connection.
d. Install a new filter drier.
e. Replace the liquid line cushion clamps.
f. Secure the receiver assembly to the side support
bracket.
Summary of Contents for 69NT40-561-201
Page 2: ......
Page 11: ......
Page 15: ......
Page 29: ......
Page 81: ......
Page 108: ...7 2 T 364 Based on Drawing 62 11753 Figure 7 2 SCHEMATIC DIAGRAM ...
Page 109: ...7 3 T 364 Based on Drawing 62 11753 Figure 7 3 UNIT WIRING DIAGRAM Sheet 1 of 2 ...
Page 110: ...7 4 T 364 Based on Drawing 62 11753 Figure 7 3 UNIT WIRING DIAGRAM Sheet 2 of 2 ...
Page 111: ......
Page 115: ......
Page 116: ......