5
5
3.
3.
Charging
Charging points
points pin
pin valve.
valve.
4.
4.
Thermal
Thermal expansion
expansion valve
valve (for
(for mod.
mod. 72
72 and
and above
above only).
only).
5.
5.
Fully
Fully charged
charged unit
unit with
with refrigerant.
refrigerant.
6.
6.
Oil
Oil equalizing
equalizing lines
lines installed
installed between
between parallel
parallel installed
installed compressors
compressors
Optional Features
Optional Features
A
A
）
）
Construction options:
Construction options:
1.
1.
Metal
Metal mesh
mesh on
on condenser
condenser section.
section.
2.
2.
Optional
Optional supply/return
supply/return air
air configurations,
configurations, optional
optional bottom
bottom supply and
supply and return
return type.
type.
3.
3.
Evaporator wi
Evaporator with treated
th treated anti-corrosion
anti-corrosion protection f
protection for coils
or coils (blue fins)
(blue fins)for copper/alum
for copper/aluminum coils
inum coils only
only..
4.
4.
“25mm
“25mm (1”)”
(1”)” or
or “50mm(2”)”
“50mm(2”)” thick
thick flat
flat filter
filter..
5.
5.
Economizer
Economizer option
option with
with fresh,
fresh, return
return and exhaust
and exhaust air
air dampers
dampers with
with cowl.
cowl.
If this option is installed in the
If this option is installed in the unit the unit has the
unit the unit has the ability to work with free cooling or free heating
ability to work with free cooling or free heating mode allowing
mode allowing
it to exploit the external environmental condition as much as possible, since it avoids turning on the heaters and
it to exploit the external environmental condition as much as possible, since it avoids turning on the heaters and
the compressors. This function can be achieved by controlling the opening/closing of the external air damper.
the compressors. This function can be achieved by controlling the opening/closing of the external air damper.
With reference to the difference between the outdoor air temperature(std)/enthalpy and the indoor air
With reference to the difference between the outdoor air temperature(std)/enthalpy and the indoor air
temperature(std)/enthalpy.
temperature(std)/enthalpy.
6.
6.
High S
High Static
tatic condenser fan
condenser fan option wi
option will al
ll also required
so required a sealed
a drain
+ drain condensing section.
condensing section.
7.
7.
Upgraded
Upgraded Evaporator
Evaporator Fan
Fan Motor
Motor Drives.
Drives.
B
B
）
）
Electrical options:
Electrical options:
1.
1.
Power
Power circuit
circuit breaker
breaker for
for each
each motor.
motor.
2.
2.
Main power
Main power molded cas
molded case circuit
e circuit breaker for
breaker for the whole
the whole unit (can
unit (can also be
also be available wit
available with an ex
h an external handle
ternal handle as an
as an option).
option).
3.
3.
Low
Low ambient
ambient control:
control:
The refrigeration systems in all
The refrigeration systems in all unit are
unit are inherently designed to operate
inherently designed to operate efficiently
efficiently, without extra
, without extra controls or modifications. T
controls or modifications. To
o
permit the unit to operate in low ambient condition a head pressure control can be Installed either by:
permit the unit to operate in low ambient condition a head pressure control can be Installed either by:
ON/OFF condenser
ON/OFF condenser fans sequencing (f
fans sequencing (for models with 2 c
or models with 2 condenser fans).
ondenser fans).
3 speed of
3 speed of the condenser
the condenser fan motor
fan motor..
4.
4.
Earth
Earth leakage
leakage relay
relay for
for each
each compressor
compressor..
5.
5.
Earth
Earth leakage
leakage relay
relay for
for the
the whole
whole unit.
unit.
6.
6.
External
External overload
overload relay
relay for
for each
each motor.
motor.
7.
7.
Power
Power factor
factor correction
correction capacitor
capacitor..
8.
8.
Automatic
Automatic or man
or manual provi
ual provision f
sion for pum
or pump down
p down operation
operation of
of each c
each compressor
ompressor stop.
stop.
9.
9.
Building aut
Building automation sy
omation system interf
stem interface. Int
ace. Interfacing wi
erfacing with other
th other building managem
building management sys
ent systems c
tems can be
an be Achieved
Achieved by an
by an optional
optional
card which can communicate with other devices using the
card which can communicate with other devices using the serial communication port.
serial communication port.
10.
10. Volt
Voltage monitor controller (phase sequence relay) for moni
age monitor controller (phase sequence relay) for monitoring the main incoming power supply for the unit which
toring the main incoming power supply for the unit which
provides protection from single-phasing, under-voltage, phase-voltage imbalance and phase-non-sequence
provides protection from single-phasing, under-voltage, phase-voltage imbalance and phase-non-sequence
Refrigeration options:
Refrigeration options:
1.
1.
Heat pump
Heat pump packaged
packaged unit with
unit with 4-way revers
4-way reversing valve,
ing valve, suction
suction accumulator
accumulator is a
is a standard
standard feature in
feature in heat pump
heat pump option.
option.
2.
2.
Pressure
Pressure gauges
gauges for
for each
each refrigeration
refrigeration circuit
circuit (high/low
(high/low pressure
pressure gauges).
gauges).
3.
3.
Hot gas
Hot gas bypass
bypass (where low-local
(where low-local situation o
situation occurs and
ccurs and where it
where it is neces
is necessary avoi
sary avoid low suc
d low suction press
tion pressure and “c
ure and “compressor
ompressor
cycling”)
cycling”)
4.
4.
Extra refrigerant
Extra refrigerant accessories
accessories such as s
such as suction accu
uction accumulators (for c
mulators (for cooling units on
ooling units only), refrigerant li
ly), refrigerant liquid receivers,
quid receivers, oil
oil
separators etc..
separators etc..
5.
5.
Solenoid
Solenoid valve
valve for
for heat
heat pump
pump mode.
mode.
6.
6.
High
High and
and low
low pressure
pressure controller
controller for
for models
models
Refrigerant Piping Diagram (Sample
Refrigerant Piping Diagram (Sample only)
only)
