Daikin DZ18VC Series Installation Instructions Manual page 9

Step 3. System Start-up
For a detailed procedure, please visit the Daikin One+ Smart
Thermostat website at http://www.daikinone.com.
If Installing with a CTK04 thermostat, please see the adden-
dum for further instructions.
Step 4. Adjust Refrigerant Level
Using service equipment, add or recover refrigerant according
to the calculation in Step 1. Allow system to stabilize for 20
minutes after adjusting charge level.
Step 5. Measure Subcooling to Verify Proper
Charge
NOTE: Charging equipment must use dedicated PVE oil
gauges and hoses.
1. Purge gauge lines.
2. Connect service gauge manifold to base valve service
ports.
3. Convert the liquid pressure to temperature using a
temperature/pressure chart.
4. Temporarily install a thermometer on the liquid line at
the liquid line service valve.
a. Ensure the thermometer makes adequate contact
and is insulated for best possible readings.
5. Subtract the liquid line temperature from the converted
liquid pressure to determine subcooling.
6. Before starting the Subcooling adjustment, make sure
the outdoor ambient temperature is in a below range
and the unit is operating at 100% capacity.
7. For EEV Indoor Unit
If the system subcooling is not within the range
as shown in the following table, adjust subcooling
according to the following procedure.
a. If subcooling is low, add charge to adjust the
subcooling as specified in the following table.
b. If subcooling is high, remove charge to lower the
subcooling to 8°F ± 1°F.
SUBCOOLING = (SAT. LIQUID TEMP.) - (LIQUID LINE TEMP.)
SUPERHEAT = (SUCT. LINE TEMP.) - (SAT. SUCT. TEMP.)
Charging Table
OD Ambient Temp
(degF)
Subcooling Weigh in
(degF)
Note: Subcool i ng i nforma ti on i s va l i d onl y whi l e the uni t i s opera ti ng
a t 100% ca pa ci ty or 100% of compres s or s peed i n CHARGE MODE.
Compres s or s peed i s di s pl a yed under STATUS menu i n the thermos ta t.
NOTE: Not more than 0.5 lb. (8 oz.) of refrigerant be added
to the system at a time to achieve the target subcooling. It is
recommended adding 4 oz. refrigerant each time, then wait
20 minutes to stabilize the system.
< 65 °F 65°F to 105°F
8°F ± 1°F
Charge
NOTICE
C S
HECK THE
. I
NECESSARY
NOTICE
D NOT
O ADJUST THE CHARGE BASED ON SUCTION PRESSURE UNLESS
THERE IS A GROSS UNDERCHARGE
NOTICE
I
F THE RAIN SHIELD WAS REMOVED DURING THE INSTALLATION
,
PROCESS BE SURE TO RE
Heat Pump with Outdoor Temperature Lock-
outs
It is recommended to set the outdoor temperature lockouts
during the initial thermostat set up. Compressor lockout
temperature will enable the compressor to be turned off and
switch heating source from refrigeration to auxiliary/secondary
heating under low outdoor ambient conditions.
Backup heat lockout temperature will enable auxiliary/sec-
ondary heating to be turned on when outdoor temperature is
much higher than indoor temperature, compressor might stop
operating under this circumstance.
Line Set Length Range
(ft.)
0 to 100
100 to 200
For detailed procedure to acess temperature, the compressor
(heat pump) lockout and the backup (auxiliary) heat lockout,
please visit the Daikin One+ Smart Thermostat website at
http://www.daikinone.com. If installing with a CTK04 thermo-
> 105 °F
stat, please see the addendum for further instructions.
Weigh in
Charge
9
CHRADER PORTS FOR LEAKS AND TIGHTEN VALVE CORES
- .
NSTALL CAPS FINGER TIGHT
.
Rain
Shield
-
INSTALL IT AFTER CHARGING THE UNIT
Compressor Lockout Temperature
,
IF
.
(F°)
15
20