TM 11-6780-225-35
temperature regulation for the ES82A. The thermostat
fuel installation by substituting the 55gallon fuel intake
controls are not graduated in degrees of temperature,
pipe for the 5gallon fuel intake pipe.
Fuel is drawn
and require a comfort setting from experience.
A
through the fuel line into the fuel strainer by a fuel pump
receptacle has been added adjacent to the power
in the UH684. The fuel
ifilter should be washed in
receptacle for connection of air conditioner No. 2 to the
cleaning compound once, for every 2 weeks that the
circuit for the air-conditioner No. 2 thermostat. The
UH684 is is operation. From the fuel filter, the fuel is
roadside and curbside louvres of both air conditioners
drawn into the UH684 for combustion. Any excess fuel
have been modified by covering them with metal
in the carburetor of the UH684 is vented to the outside of
lightproof baffles. A removable plate has been added to
the ES82A through the fuel overflow drain port. Power
the underside of each air conditioner to provide access
is supplied from circuit 7 to a male power receptacle
to the filters. A hole in the center of each plate allows
mounted on the UH684. Refer to TM 59163 for complete
removal of the condensate. When the selector switches
functioning of the UH684. When the UH684 is used for
of each air conditioner are set to cool as required, cold
heating the ES82A, S9 on the control panel is set to the
air is distributed through the top roadside and curbside
HEATER position and Sll is set to the ROOM position,
ducts into all compartments of the ES82A. Return air is
allowing the heating thermostat S2 (set to a
drawn into the bottom roadside and curbside ducts and
predetermined temperature) to monitor the heating
vented to the outside through the airconditioner's return
operation.
Fresh air to replace the air used for
air grills.
combustion is drawn in through the fresh air intake. A
movable slide with pin stops provides adjustment, and a
2-6.
Intercom
fixed stop prevents the movable slide from complete
closure, so a supply of fresh air is always available.
Each intercommunication station contains a power
Gases from combustion are vented to the outside
supply, a 3stage transistorized amplifier and a
through an asbestos insulated exhaust pipe and exhaust
loudspeaker.
Electric power from circuit 4 to each
stack. Moisture that has condensed inside of the exhaust
station is controlled by an ONOFF switch which also acts
pipe and exhaust stack may be drained through the
as a volume control.
A rotary SELECTOR SWITCH
exhaust pipe condensate drain located outside the
connects the desired station and a PRESSTOTALK
ES82A. When the drying cabinet heat control is in the
switch converts the loudspeaker to microphone
closed position, the heated air, blocked from being
operation.
forced upward by the UH684 into the film and print drying
2-7.
Space Heater, and Film and Print Drying
cabinets is forced downward into a plenum chamber.
Cabinets
With the SUMMERWINTER damper control in the
(fig. 52)
WINTER position, the heated air in the plenum chamber
is forced through the heating ductwork into the ES82A.
The functioning of space heater UH684 is described in a
If S9 on the control panel is set to the FAN position,
below and the functioning of the film and print drying
thermostatic monitoring is removed from the UH684, and
cabinets are described in b below.
unheated air is forced into the heating ductwork in the
a. Space Heater. Space heater UH684 has a dual
same manner as described above.
function as follows:
b. Film and Print Drying Cabinets. The film and
to supply forced unheated air to the heating ductwork,
print drying cabinets provide drying by evaporation and
and/or forced unheated air to the film and print drying
may function in any of the three modes given below.
cabinets; or to supply forced heated air to the heating
ductwork, and/or forced heated air to the film and print
switches S6, S7, and S8 as required, on the control
drying cabinets.
The UH684 has been modified by
panel to the MAN position, power from circuit 7 is
removing the bottom plate, the right side panel, the right
supplied to the three exhaust fans B1 B2, and B3.
access door, and the left side panel. The spare fuses
When lamps DS1, DS2, and/or D& are illuminated, the
have been removed from the front access door and
exhaust fan(s) are operating.
relocated adjacent to the space heater. The control box
With the drying cabinet heat control in the closed position
has been removed and mounted adjacent to the film and
and the air conditioners in operation, a positive air
print drying cabinet controls, as part of the control panel
pressure
will
be
maintained
in
the
installation mounted aft outside of the ES82A. A 55-
gallon
drum
may
be
used
as
a
2-4
