Maxtec MaxVenturi User manual

2305 South 1070 West
Salt Lake City, Utah 84119 USA
[phone]
Fax [phone]
Toll Free USA 1-866-4maxtec
[email protected] www.maxtec.com
MaxVenturi Oxygen Delivery Device
Preventative Maintenance Manual-R211M02 Rev A

R211M02 Rev A. Page 1 of 3
1. INTRODUCTION
NOTICE
Repair of this equipment must be performed by a qualified service technician experienced in
repair of portable hand-held medical equipment. The MaxVenturi series of products has been
designed for maximum reliability, stable performance and low maintenance.
Send Maxtec products/material in need of factory repair to:
Maxtec
Customer Service Department
2305 South 1070 West
Salt Lake City, Utah 84119 USA
(Include RMA number)
Maxtec Customer Service Line: 1-800-748-5355
HOW TO USE THIS MANUAL
This manual provides service technicians with information needed to check the MaxVenturi series
of products. This manual should provide the technicians with the general steps needed to check
the condition of the MaxVenturi and assess if any repairs are needed. The MaxVenturi service
manual (R211M01) provides the specific processes needed for repair.
CAUTION
The MaxVenturi contains electronic components that are susceptible to damage by electrostatic
discharge. When disassembling the device, work at a static controlled workstation; wear a static
control wrist strap to discharge accumulated static charges from you and any tool you are using.
Handle the circuit board by the case. Use antistatic containers for transporting circuit boards.

R211M02 Rev A. Page 2 of 3
2. MAXVENTURI PREVENTATIVE MAINTENANCE PROCEDURE
2.1 Check the following for wear, damage, or loosening:
□Outlet conic □Inlet conic □Orifice □Pole Clamp
2.2 Flow Meter Check:
1. Tilt the MaxVenturi back and forth and observe that flow meter ball rolls freely
within the flow meter.
2. Verify that the o-rings are intact. The o-rings should not have any cracks or voids.
3. Replace the o-rings if necessary, replacement part numbers can be found in the
MaxVenturi service manual.
2.3 Valve Wear Check:
1. Open the oxygen valve all the way. The knob should turn approximately
9 complete rotations from fully closed to fully open. Also check for any “stickiness” or
non-uniformity in the turn.
2. Open the flow valve all the way. The knob should turn approximately 9 complete
rotations from fully closed to fully open. Also check for any “stickiness” or non-
uniformity in the turn.
3. Check for straightness of the valve stem while rotating the knob.
4. Replace the control valves if necessary. See the Maxtec Service Manual for
repair/replacement procedures.
2.4 MaxVenturi Leak Test Procedures (see section 3.5 for Leak Test Kit)
1. Attach an oxygen supply line to the oxygen inlet fitting on the back of the
MaxVenturi being tested.
2. Close the O2and flow valves. Plug the sensor port and the outlet port with plugs
or caps such as those included with the device when new. Insert the 22mm to 6 mm
adapter into the air inlet. Place the silicone tube on the 22mm to 6 mm adapter.
Place the opposite end of the tube into a container of water.
3. Open the oxygen supply line at the back of the MaxVenturi. Watch for bubbles in
the container of water. The maximum number of allowable bubbles is 1 bubble
per minute.
4. If the unit leaks air into the container of water, loosen the oxygen valve from the
unit using a ½” open end wrench, then retighten (slowly) and watch for bubbles. If
the unit still leaks loosen the flow valve from the unit using a ½” open end wrench,
then retighten (slowly) and watch for bubbles. If the valves continue to leak, remove
the valves and replace the o-rings (RP56P02-901) on the small end of the valve
opposite the knob ends.
5. If the unit continues to leak, the interior of the valves have worn and may need
replacement. See the Maxtec Service Manual for repair/replacement procedure.
Note: Maxtec has upgraded the valve in 2011 and upgrade kits are available for
purchase.

R211M02 Rev A. Page 3 of 3
3. MAXVENTURI REPLACEMENT KITS
3.1 Flow Control Valve Replacement Kit – R211P30-001
The flow control valve replacement kit comes with a flow control valve, black knob
and knob end cap.
* It is recommended to replace both valves at the same time.
3.2 Oxygen Control Valve Replacement Kit – R211P30-002
The oxygen control valve replacement kit comes with a flow control valve, black
knob and knob end cap.
* It is recommended to replace both valves at the same time.
3.3 Conics Replacement Kits – R211P25 & R211P25-001
3.3.1 MaxVenturi Female Conic Repair Kit (Inlet conic) – R211P25-001
The female conic replacement kit comes with a new inlet conic with a small vial of
adhesive. The inlet conic is located on the bottom of the unit.
3.3.2 MaxVenturi Male Conic Repair Kit (outlet conic) – R211P25
The male conic replacement kit comes with a new outlet conic with a small vial of
adhesive. The outlet conic is located on the left side of the device.
3.4 Orifice Replacement Kits – R211P26 & R211P26-001
3.4.1 MaxVenturi Orifice Upgrade Kit – R211P26-001
The MaxVenturi Orifice Upgrade Kit includes:
2 tools, 1 replacement orifice, and an o-ring
Tools are needed for replacement of the orifice.
3.4.2 MaxVenturi Orifice Replacement Kit – R211P26
The MaxVenturi Orifice Replacement Kit includes:
1 replacement orifice and an o-ring
Note: The orifice very rarely needs replacement. The replacement procedure requires
additional equipment for testing. Therefore, it is recommended that devices requiring orifice
replacement should be returned to Maxtec for the replacement procedure. Contact Maxtec
Customer service for details.
3.5 Leak Test Kit – R211P32
The MaxVenturi Leak Test Kit includes: 2 plugs, a 22mm to 6 mm adapter, and a 12”
length of silicone tubing.