CHART Orca MicroBulk CO2 Series - Pressure Build: Operation

14
Operations Product Manual - Orca
™
CO
2
Series MicroBulk Delivery System
a. The timer can be set to turn on the heater at a specic
time each day of the week. This normally won’t be
needed but can be used.
2. Press center button on timer to start heater. Heater will
start regardless of ignition key switch position. See
section “Dash Controls” for further details.
a. In key ON position, heater will run indenitely.
b. In key OFF or ACC, heater will only run for a
maximum of 120 minutes, which can be increased or
decreased any time using the arrows. This will
preserve the battery if left on.
c. Note: the timer continues to decrement in any key
position, so if the timer reaches zero when in the key
ON position, the heater will shut o if the key is
moved to OFF or ACC. Press the right arrow to
increase time before moving key position or restart
the heater with the middle button.
3. Start heater 20-40 minutes before delivery.
a. ≈20 minutes if in 80°F ambient, 30 minutes in 30°F,
longer for colder temperatures.
b. Heater will run indenitely with key in ON position. In
OFF or ACC, heater will run as long as time is left on
the timer.
Note: Ifheaterfailstostart,turnheateroand
back on. Remove heater cover and listen
forwaterpumptospin,followedbyfuel
pump clicks and burner lighting. See
heater manual for additional details.
4. After delivery, decide if heater is to remain on or shut
o based on outside temperature and time to next
delivery.
a. Keep running if next delivery is soon: <30 minutes,
depending on ambient temperature.
b. Or turn o if next delivery will be later: >30 minutes,
depending on ambient temperature.
c. Heater can be left on all day in between runs.
i. The heater runs on high until coolant temperature
reaches 176°F (80°C).
ii. Cycles to low mode until coolant drops to 167°F
(75°C).
iii. This repeats until coolant reaches 185°F (85°C),
at which heater shuts o.
iv. Heater restarts when cooled down to 158°F
(70°C).
V. Pressure Build: Operation
1. After the heater has been on for appropriate time, the
Pressure Build Coil (PBC-1) has built sucient heat
into the 60/40 propylene glycol/water mixture (3 parts
PG : 2 parts water).
a. Propylene glycol is used for its non-toxic properties.
b. A 60% mixture provides -70°F freeze protection from
cold outside ambient temperature and cold liquid CO
2
temperature with factory installed DELO ELC PG
Antifreeze/Coolant (other brands will vary in cold
temperature protection).
2. Note the tank arrival pressure to determine how much
pressure to build.
a. More pressure will provide higher ow rate and
reduce likelihood of pump cavitation.
b. Exceeding the tank 350 psig MAWP will cause the
main reliefs to vent.
c. Exceeding the Pump (P-1) and Bypass (V-7) valve
400 psig MAWP will cause the Pump Discharge
Relief (RV-11) valve to relieve.
i. Bypass (V-7) valve is factor set to 70 psid.
Exceeding 330 psig tank pressure will exceed
400 psig pump discharge when pump is started,
causing Pump Discharge Relief (RV-11) to
relieve.
ii. If Orca CO
2
pressure exceeds 330 psig, either
pressure transfer or vent until pressure is below
330 psig before starting the pump.
d. Monitor the tank pressure during pressure building.
Caution! There is no automated method
to stop pressure building. The
only way to stop pressure
building is to close the PB
Liquid (V-28) and PB Force
Feed (V-16) valves. Leaving
these open or unattended can
cause the tank main reliefs to
vent!
3. Open one of two liquid supply valves. Both valves can
be open concurrently.
a. Open the Pressure Build Liquid (V-28) valve to
gravity feed-pressure build.
i. This will be used most of the time.