Johnson Controls York VCH 20A, Technical Information

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9.- Press
���
to confirm the change.
10.- Press
��������
to save the changes and exit the program-
ming mode.
11.- To program "PØ1", press
��������
for 5 seconds, until
"PØ1" appears on the display.
12.- Press
���
to access the current value.
13.- Use the and keys to modify the value in accord-
ance with the above tables.
14.- Press
���
to confirm the change.
15.- Press
��������
to save these values and exit the program-
ming mode.
16.- To program the remaining "Cxx" parameters, press
���
and
��������
simultaneously for 5 seconds, until "ØØ"
appears on the display. Enter the password "77" and
press SEL to confirm.
17.- By means of the and keys, move through the
different "Cxx" parameters, and then use
���
to access
and validate the values and the and keys to
modify these parameters in accordance with the above
tables.
Horizontal air discharge assembly
0.- Check to see the packing is not damaged. Unblock the
motor and make sure the slits open and close correctly
by applying force.
1.- Disconnect power supply to the unit.
2.- Discard the 2 "
" supports and the 2 " " gaskets
provided for the vertical air discharge version.
3.- Install the lower support supplied, as in the figure. Fas-
ten the support with the self-threading screws of the
accessory.
4.- Lean the dampers on the previously fitted support, with
the motor at the point nearest the control panel.
5.- Install the top support and fasten it to the chassis of the
unit by means of the drilled holes and the self-threading
screws supplied.
6.- Fasten the dampers to the lower and top supports with
the self-threading screws supplied.
7.- Install the side gaskets as shown in the figure.
8.- Open the control unit panels, as well as the right rear
panel (compressor zone).
9.- Install control CP1 and the relays RL1 and RL2 (on
VCH-45/90A only) on the DIN guide on connecting strip
X1.
10.- Move contactors KM1 and KM2 (compressors) so as
to attach the side auxiliary contacts supplied.
11.- Screw the pressure switches on to the upper inputs that
are not connected to the corresponding high cooling
circuits. But first unscrew and remove the plugs that
protect same.
12.- Connect the pressure switch hoses and fasten them by
means of the clamps supplied, along with the existing
wiring cables.
13.- Insert the pressure switch hoses through the hole indi-
cated on the electric box diagram, using the 19 mm. Ø
wall hole guide supplied.
14.- Connect the pressure switch hoses to the control unit
(for 2-compressor hoses only).
15.- Remove the damper motor cover, insert the damper
hoses and connect as indicated on the corresponding
diagram.
16.- Drill a 22 mm. Ø hole on the left side front panel (next
to damper motor) and insert the guide. Insert the motor
hose.
17.- Then insert the motor hose through the guide at the
base of the electric box and connect the cables.
18.- Connect all cables supplied, in accordance with the
corresponding wiring diagram.
19.- Turn main power supply on and program the control
unit.
20.- Close all panels.
Vertical air discharge assembly
0.- Check to see the packing is not damaged. Unblock the
motor and make sure the slits open and close correctly
by applying force.
1.- Disconnect power supply to the unit.
2.- Discard the top support " " and the bottom support
" " or " ", as per models, provided for the horizontal
air discharge version.
3.- Install the " " type vertical discharge supports at the
points indicated in the vertical discharge assembly
diagram, by means of the self-threading screws sup-
plied. On models VCH 20 to 60, both "
" supports
are fastened on the roof. On models VCH 75 to 90, the
"
" support for the coil side is fastened on the roof, and
on the panel side it is fastened on the vertical surface
of the longitudinal reinforcement of the roof.
4.- Lean the dampers on the previously fitted supports,
with the motor at the point nearest the control panel.
5.- Fasten the damper to the supports with the self-thread-
ing screws supplied.
6.- Fasten the vertical discharge gaskets to the supports
with the self-threading screws supplied.
7.- Open the control unit panels, as well as the right rear
panel (compressor zone).
8.- Install control CP1 and the relays RL1 and RL2 (on
VCH-45/90A only) on the DIN guide on connecting
strip X1.
9.- Move contactors KM1 and KM2 (compressors) so as
to attach the side auxiliary contacts supplied.
10.- Screw the pressure switches on to the upper inputs that
are not connected to the high cooling circuits. But first
unscrew and remove the plugs that protect same.
11.- Connect the pressure switch hoses and fasten them by
means of the clamps supplied, along with the existing
wiring cables.
12.- Insert the pressure switch hoses through the hole
indicated on the electric box diagram, using the
19 mm. Ø wall hole guide supplied.
13.- Connect the pressure switch hoses to the control unit
(for 2-compressor hoses only).
14.- Remove the damper motor cover, insert the damper
hoses and connect as indicated on the corresponding
diagram.
15.- Drill the 22 mm. Ø hole on the left side front panel (next
to damper motor) and insert the wall hole guide for the
damper hose. Insert the motor hose.
16.- Then insert the motor hose through the guide at the
base of the electric box and connect the cables.