Calorex PORTA TEMP 240, Service Manual

Page: 4 / 12

Page 4
6) ROOM UNIT WATER LEVELS .
The water system in the room unit will be to the correct
level when delivered. However if for some reason the level
has fallen, antifreeze (33%) and water will have to be added.
The header tank filler and level indication is located to the
rear of the room unit and can be accessed by removing the
two screws holding the security plate over the filler tank
cap, see Fig 2. Ensure the machine is running in cooling
mode before removing the header tank cap, and as with all
pressure caps, remove slowly. It is recommended that a
mixture, by volume, of one part antifreeze to two parts water
is utilised, this will prevent freezing down to an external
temperature of -30°C/-5ºF. The approximate total volume
the systems, room unit with external heat exchanger and
lines is as follows:-
DO NOT APPLY MAINS WATER PRESSURE TO THE
SYSTEM.
Fig 2
10
C 34
C
1
2
3
4
5
6
7
8
THERMOSTAT
KNOB
MAINS LIGHT
(RED)
MODE
SWITCH
FAN ONLY
POSITION
COOLING
POSITION
FAN SPEED
SWITCH
FAN SPEED
HIGH
FAN SPEED
LOW
COOLING LIGHT
(GREEN)
ATTENTION LIGHT
(AMBER)
HIGH
PRESSURE
RE-SET
LOW
PRESSURE
RE-SET
DEFROST
LIGHT (WHITE)
OFF
POSITION
7) OPERATING INSTRUCTIONS.
The Control Panel on the room unit is illustrated below,
see Fig 3.
a) Revolve thermostat knob fully CLOCKWISE to the
number "8" position.
b) Plug in the room unit mains cable, and switch on
electricity, red mains light will illuminate.
c) Select "Fan Only" with the mode switch. The fan will
start.
d) Select "Fan Speed", with the fan speed switch, high or
low depending on air velocity required.
e) Select "Cooling" with the mode switch, and revolve the
thermostat knob fully ANTI-CLOCKWISE to the number
"1" position. If fitted the external heat exchanger fan and
the water pump in the room unit will start. After a delay of
10mins the green "Cooling" light will illuminate and the
machine will proceed to cool the air.
f) Monitor the room temperature and when it has reduced
to the desired level, very slowly revolve the thermostat knob
back, clockwise, until the green "Cooling" light goes out.
The room unit will now control the room temperature cooling
automatically at this setting.
Fig 3
LINESET LENGTH Total Volume Units
16FT 2.65 U.S Gallons
21FT 3.07 U.S Gallons
32FT 3.25 U.S Gallons
48FT 3.85 U.S Gallons
64FT 4.45 U.S Gallons
80FT 5.05 U.S Gallons