Pioneer Inverter+ WAS Series Installation Manual page 33

DOUBLE-CHECK PIPE CONNECTIONS
During operation, the pressure of the
refrigerant circuit will increase. This may
reveal leaks that were not present during your
initial leak check. Take time during the Test
Run to double-check that all refrigerant pipe
connection points are leak free. Refer to the
Gas Leak Check section for instructions.
After the Test Run is successfully completed,
5.
and you confirm that all checks points in List
of Checks to Perform have PASSED, do the
following:
Using remote control, return unit to
a.
normal operating temperature.
Using insulation tape, wrap the indoor
b.
refrigerant pipe connections that you
left uncovered during the indoor unit
installation process.
IF AMBIENT TEMPERATURE IS TOO LOW TO
RUN THE COOLING FUNCTION FOR TESTS
You can't use the remote controller to turn
on the COOL function when the ambient
temperature is extremely low. In this instance,
you can use the MANUAL CONTROL button
to test the COOL function.
Lift the front panel of the indoor unit, and
1.
raise it until it clicks in place.
The MANUAL CONTROL button is located
2.
on the right-hand side of the unit. Press it 2
times to select the COOL function. See
Fig.8.1
.
Perform Test Run as normal.
3.
Manual control button
Fig. 8.1
The operating pressures of the system is
approximatey 4 times higher when the
HEAT mode is running. Therefore it is
much easier to check for and locate any
refrigerant leaks while running the heat
mode. Slower leaks can be detected due
to the higher pressures in the system.
System pressures change based on the
inside and outside air temperatures.
Usual range of pressures are (r410a):
a. Suction pressures in Cooling Mode:
120 to 155 PSI. Both copper pipes are
cold but not having any frosting.
b. Hot gas pressures in Heating Mode:
320 to 440 PSI. Both copper pipes are
hot, but gas side is much hotter.
Note: Values are indicative only.
 
Page 33