Daikin DZ16TC0241, Руководство по установке, Страница: 5 / 24

5
P
ROLONGED OPERATION AT SUCTION PRESSURES LESS THAN
20
PSIG
FOR MORE THAN
5
SECONDS WILL RESULT IN OVERHEATING OF THE
SCROLLS AND PERMANENT DAMAGE TO THE SCROLL TIPS
,
DRIVE
BEARINGS AND INTERNAL SEAL
.
CAUTION
1. Connect the vacuum pump with 250 micron capability to
the service valves.
2. Evacuate the system to 250 microns or less using suction
and liquid service valves. Using both valves is necessary
as some compressors create a mechanical seal separating
the sides of the system.
3. Close pump valve and hold vacuum for 10 minutes.
Typically pressure will rise during this period.
• If the pressure rises to 1000 microns or less and remains
steady the system is considered leak-free; proceed to
startup.
• If pressure rises above 1000 microns but holds steady
below 2000 microns, moisture and/or noncondensibles
may be present or the system may have a small leak.
Return to step 2: If the same result is encountered check
for leaks as previously indicated and repair as necessary
then repeat evacuation.
• If pressure rises above 2000 microns, a leak is present.
Check for leaks as previously indicated and repair as
necessary then repeat evacuation.
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1 2 3 4 5 6 7 8 9
10
LEAK(S)
PRESENT
MINUTES
V
ACU
U
M
IN
MI
CR
O
N
S
CONDENSIBLES OR SMALL
LEAK PRESENT
NO LEAKS
NO CONDENSIBLES
E
LECTRICAL
C
ONNECTIONS
HIGH VOLTAGE!
D
ISCONNECT
ALL
POWER BEFORE SERVICING
.
M
ULTIPLE POWER SOURCES MAY BE PRESENT
. F
AILURE
TO DO SO MAY CAUSE PROPERTY DAMAGE
,
PERSONAL
INJURY OR DEATH DUE TO ELECTRIC SHOCK
. W
IRING
MUST CONFORM WITH
NEC
OR
CEC
AND ALL LOCAL
CODES
. U
NDERSIZED WIRES COULD CAUSE POOR
EQUIPMENT PERFORMANCE
,
EQUIPMENT DAMAGE OR
FIRE
.
WARNING
T
O AVOID THE RISK OF FIRE OR EQUIPMENT DAMAGE
,
USE COPPER
CONDUCTORS
.
WARNING
The condensing unit rating plate lists pertinent electrical data
necessary for proper electrical service and overcurrent protec-
tion. Wires should be sized to limit voltage drop to 2% (max.)
from the main breaker or fuse panel to the condensing unit. Con-
sult the NEC, CEC, and all local codes to determine the correct wire
gauge and length.
Local codes often require a disconnect switch located near the
unit; do not install the switch on the unit. Refer to the installation
instructions supplied with the indoor furnace/air handler for spe-
cific wiring connections and indoor unit configuration. Likewise,
consult the instructions packaged with the thermostat for mount-
ing and location information.
O
VERCURRENT
P
ROTECTION
The following overcurrent protection devices are approved for
use.
• Time delay fuses
• HACR type circuit breakers
These devices have sufficient time delay to permit the motor-com-
pressor to start and accelerate its load.
H
IGH
V
OLTAGE
C
ONNECTIONS
Route power supply and ground wires through the high voltage
port and terminate in accordance with the wiring diagram pro-
vided inside the control panel cover.
L
OW
V
OLTAGE
C
ONNECTIONS
This heat pump is equipped with a factory-installed transformer
to power the outdoor controls when installed as part of a fully
communicating HVAC system utilizing a ComfortNet™ compatible
indoor unit. In this configuration only two low voltage control
wires are required between the outdoor unit and indoor unit.
The unit also has legacy 24 VAC inputs to support non-communi-
cating systems. When this configuration is used, the transformer
in the outdoor unit must be disconnected from the low voltage
and line voltage connections. The transformer connecting wires
can then be discarded. Route control wires through the low volt-
age port and terminate in accordance with the wiring diagram
provided inside the control panel cover.