3
M
INI
-S
PACE
EC I
NSTALLATION
, O
PERATION
AND
M
AINTENANCE
M
ANUAL
1.4 General
Design
The Mini-Space EC unit is housed in a steel frame cabinet rated for indoor use. The exterior of the cabinet has a powder coat
fi nish to protect against corrosion. A hinged door on the front of the cabinet gives access to components. Operator controls
are conveniently located on the cabinet door.
Figure 1 depicts a typical internal layout of a CCU-041-A-EC (upfl ow) unit and identifi es the major components. Location of
the major components vary depending on the purchased Mini-Space EC model and options.
FILTER
(BEHIND
FRONT DOOR)
MAIN POWER
DISCONNECT
SWITCH
GRAPHIC TERMINAL
DOOR LATCH
(3 PLACES)
EC FAN
COIL
CONDENSATE
DRAIN PAN
RECEIVER
HUMIDIFIER
SMOKE DETECTOR
T/H SENSOR
FIRESTAT
ELECTRIC BOX
(BEHIND FRONT DOOR)
COMPRESSOR
HEATER
(ELECTRIC)
Figure 1.
Typical Upfl ow Internal Layout
(Model CCU-041-A-EC shown for reference)
1.4.1 Electric
Box
Access
Electrical components are protected by the front access
door, which is locked in three places. To open the front door,
turn the door locks with the triangular key wrench provided.
The front door is also safety interlocked with the main power
disconnect switch, preventing the door from opening when
the switch is in the “On” position. The switch must be turned
to the “Off” position to gain access to the electric box.
The main power disconnect switch may be used to turn the
unit off for emergency shutdown or when routine maintenance
is performed. The handle of the switch may be locked in the
“Off” position to prevent unintended operation.
1.4.2 Circuit Breakers / Motor Start
Protectors
Individual overload protection is provided by circuit breaker(s)
and motor start protectors. These switches must be manually
reset once the overload condition is cleared.
1.4.3 Heaters
(Optional)
Heaters may be furnished for reheating the supply air, as
required to offset the sensible cooling of the system during
the dehumidifi cation cycle, and for the automatic heating
mode. As a standard, electric resistance heating elements are
factory installed in the supply airstream to heat the supply air.
As an option, hot gas reheat may be purchased. A hot gas
