CHART Orca MicroBulk CO2 Series, Product Manual

14

Operations

Product Manual - Orca

™

 CO

2

 Series MicroBulk Delivery System

a. The timer can be set to turn on the heater at a specific  

    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 indefinitely.

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 off 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 indefinitely 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 off 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 

off 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 off 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 off.

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 sufficient 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 flow 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