REFILLING HEED FROM A FILL STATION USING #920C ADAPTER:
(Use a high-pressure, breathing air quality air compressor designed to fill air systems.)
WARNING: If the HEED Check Valve Refill Port or Refill Adapter threads are damaged or worn these parts
will require replacement. Continued use may cause injury.
CAUTION: DO NOT stand directly over HEED regulator while filling.
CAUTION: Ensure the regulator is firmly attached to the cylinder (hand tight, no tools required).
1. Unscrew black cap from the Check Valve Refill Port.
2. Apply small amount of food grade silicone grease to Refill Port threads with your finger.
3. Screw Refill Adapter onto Refill Port until finger tight.
NOTE: DO NOT apply a wrench or otherwise overtighten.
4. Attach the yoke from the compressor to the Adapter.
NOTE: If line is pressurized over 3200 PSI, adjust the line pressure to 3200 PSI.
5. Turn the valve on your compressor ON.
6. Refill the cylinder to 3200 psi initially, after cooling down the pressure will be approximately 3000 psi.
Regulate the flow so that it takes approximately 45-60 seconds to fill the cylinder.
NOTE: Filling too fast can generate heat and will result in an incomplete fill after the cylinder cools.
NOTE: Fill cylinder slowly and DO NOT OVERFILL to protect the safety burst disc inside the regulator from
rupturing. If it ruptures, a new 3300 psi burst disc must be installed before unit can be filled.
7. When the cylinder is full, turn the compressor or fill station valve OFF.
8. Open bleed knob to release pressure in line. Remove Adapter from compressor yoke.
9. Remove Adapter from HEED and replace black cap on Refill Port.
10. Check the Pressure Indicator. If the tank is full, the Dial Gauge will read 3000 psi.
REFILLING HEED FROM A STANDARD SCUBA CYLINDER USING #910S ADAPTER:
WARNING: If the HEED Check Valve Refill Port or Refill Adapter threads are damaged or worn these parts
will require replacement. Continued use may cause injury.
CAUTION: DO NOT stand directly over HEED regulator while filling.
CAUTION: Ensure the regulator is firmly attached to the cylinder (hand tight, no tools required).
1. Unscrew black cap from the Check Valve Refill Port.
2. Apply small amount of food grade silicone grease to Refill Port threads with your finger.
3. Screw Refill Adapter onto Refill Port until finger tight.
NOTE: DO NOT apply a wrench or otherwise overtighten.
4. Turn knurled ring on Adapter firmly to closed (clockwise) position.
5. Attach Refill Adapter to SCUBA cylinder valve.
6. Open SCUBA cylinder valve very slowly just until you can hear air passing from one cylinder to the other.
NOTE: Filling too fast can generate heat and will result in an incomplete fill after the cylinder cools.
NOTE: If air is escaping from the Adapter during filling, close cylinder valve, wait for air to stop and re-
tighten knurled ring by turning to closed (clockwise position).
7. When at least 2 minutes have elapsed, and air can no longer be heard flowing from the cylinder, turn the
cylinder valve completely open to ensure maximum fill.
NOTE: SCUBA cylinder must be filled to 3000 psi at beginning of refill procedure in order to fill to
recommended full capacity.
8. Close SCUBA cylinder valve.
9. You must turn the knurled ring on Adapter to open (counter-clockwise) position to relieve pressure in the
Adapter.
NOTE: You will not be able to remove the Adapter from Refill Port until this is done.
10. Remove Adapter from SCUBA cylinder and HEED.
11. Replace black cap on Refill Port.
