AirSep MN118-1 B - Manual (Page 18)

MN118-1 rev B
02/14
13
2. 220-240VAC units
a. EQ coil = 4,400ohms +/- 10%
b. Feed/waste coil = 3,220ohms +/- 10%
You can also determine which coil is not operating by checking each valve to see if
it becomes energized (magnetized) during unit operation.
To check for coil operation, follow the steps below:
1. Remove plastic cap securing the valve coil to the valve stem. (Do not
remove coil).
2. With unit operating, hold a paperclip or the metal tip of a screwdriver
slightly over the top of the valve stem located in the center of the coil.
3. When the coil becomes energized (magnetized) the paperclip or tip of the
screwdriver will be pulled down onto valve stem, indicating the valve coil is
operating.
4. If a coil is faulty, it will not become energized and require replacement.
To replace a solenoid valve coil, follow the steps below:
1. Set the unit’s I/ 0 switch to the “0” position and disconnect the power cord.
2. Remove the side and back panels.
3. Remove the red cap with a slotted-head screwdriver.
4. Disconnect the solenoid leads, and lift off the solenoid coil.
5. Replace with the new coil.
6. Press the red cap back on top of the coil, and reconnect the solenoid leads.
7. Reconnect the back and side panels.
5.5 Sieve Beds
The NewLife Intensity unit utilizes two sieve beds, each containing molecular sieve. The
unique property of molecular sieve enables it to physically attract nitrogen when air passes
through this material, thus producing highly concentrated oxygen.
While one sieve bed produces high concentration oxygen, the other is purged of the
nitrogen it adsorbed (collected) while it concentrates oxygen. Each adsorber (sieve bed)
produces oxygen and delivers it to the product tank
5.5.1 Sieve Bed Replacement
Leaks can be so small in air loss that oxygen concentration is not
affected immediately. The sieve material can become contaminated
gradually. Careful leak testing is important as the sieve material can
become contaminated gradually with very small leaks.
If replacement is necessary, you must replace both sieve beds at the
same time.
Temporarily seal sieve bed openings with tape to prevent the sieve
material from being exposed to the moisture in room air. Prolonged
exposure to room air results in contamination and permanent damage
to the sieve material.