FORM 145.29-IOM2 (814)
JOHNSON CONTROLS
13
EVAPORATOR BLOWER DISCHARGE
CONVERSION
All models can be factory ordered with either front or
top fan discharge.
Procedure for converting the fan discharge is similar
on all models. Original drive belts will need to be
replaced, see
‘Drive Belt’ section for alternate belt
information.
-
Remove the panel attachment screws on the
alternate location access panel. Remove the
panel and set aside.
-
Remove blower drive belt on all models with
base mounted motors.
-
Remove the panel attachments screws on the
blower mounting panel. Do not remove fasteners
securing blowers to panel! The blowers are to
remain attached to the mounting panel at all
times.
-
Carefully remove the blower panel assembly
from the evaporator cabinet. Do not allow blower
housings to contact the evaporator coil during the
removal. On some models, the housing(s) will
have to be "rotated" to exit through the panel
opening.
-
Interchange the blower panel assembly with the
position of the alternate access panel. Exercise
care in locating the panel. Do not allow blower
housings to contact the evaporator coil. Install
the attachment screws and tighten securely.
-
Install the blank access panel into the remaining
evaporator opening. Fasten securely.
-
Install new drive belts.
-
Adjust drive belts to appropriate tension. Test run
blower and observe operation for unusual
sounds or vibration.
ELECTRICAL WIRING
Follow local electrical codes when making electrical
connections. Units are completely factory wired for
normal
supply
voltages
(ie.208-230,
460,
575V/3Ph/60Hz) Confirm unit specifications by
checking unit data plate. All electrical components are
accessible through an independent electrical panel
located on the "front" face of the condensing section.
The electrical control boxes are located behind outer
access panels. The condenser section electrical cover
is installed with wiring diagrams on the inside, which
must be opened to be read.
Ensure evaporator motor rotation is
correct upon unit start-up. Switch any
two wires at contactor if blower rotation
is not correct.
DISCONNECT AND LOCK OUT POWER
WHEN SERVICING UNIT. UNIT MAY
START AUTOMATICALLY IF POWER IS
NOT DISCONNECTED. FAILURE TO DO
SO MAY RESULT IN PERSONAL IN-
JURY OR DEATH DUE TO ELECTRICAL
SHOCK.
If canvas flexible joints are used on ductwork, install a
ground wire to the ductwork as well.
IMPORTANT: All wiring must comply
with applicable local and national codes
(NEC). Type and location of disconnect
switches
must
comply
with
all
applicable codes.
For low voltage thermostat wiring, 18 gauge wire may
be used for up to 50 feet lengths. Low voltage runs up
to 125 feet require 16 gauge wire.
Summary of Contents for DSV60B-300B
Page 5: ...FORM 145 29 IOM2 814 JOHNSON CONTROLS 5 DSV TYPICAL INSTALLATION DIAGRAM ...
Page 37: ...FORM 145 29 IOM2 814 JOHNSON CONTROLS 37 APPENDIX C TYPICAL UNIT WIRING SCHEMATICS ...
Page 38: ...FORM 145 29 IOM2 814 38 JOHNSON CONTROLS ...
Page 39: ...FORM 145 29 IOM2 814 JOHNSON CONTROLS 39 ...
Page 40: ...FORM 145 29 IOM2 814 40 JOHNSON CONTROLS ...
Page 41: ...FORM 145 29 IOM2 814 JOHNSON CONTROLS 41 ...
Page 42: ...FORM 145 29 IOM2 814 42 JOHNSON CONTROLS ...
Page 43: ...FORM 145 29 IOM2 814 JOHNSON CONTROLS 43 TYPICAL VFD UNIT WIRING SCHEMATIC ...
Page 45: ...FORM 145 29 IOM2 814 JOHNSON CONTROLS 45 NOTES ...
