Maintenance
1.
Line Pressure Adjustment:
(Green Band
for Model Using Mobile “E” Stand): Locate
appropriate PRESSURE REGULATOR (blue
lettering – nitrous oxide; green lettering –
oxygen); remove 9/16” acorn nut; insert 5/32”
hex socket key and adjust pressure to within
green band.
2.
Mixture Pressure Control Adjustment:
(Green Band): Remove LOWER CHROME
PLUG from case back. With wrench, loosen
7/16 inch hex nut (counterclockwise)
approximately one quarter turn. Insert
screwdriver through access hole, in bottom of
case, into slot of adjusting screw. While holding
nut with wrench, adjust counterclockwise to
increase pressure – clockwise to decrease.
After adjustment, tighten nut while holding
screw in position with screwdriver (see
illustration Fig. 24).
3.
Leak Test System –
Monthly Check of
working pressure leaks. Verify hoses are
attached from E-Stand to Nitronox Housing.
Turn one O
2
and one N
2
O cylinder on. Verify E-
Stand pressure gauges read cylinder
pressures. Verify Nitronox line pressure gauges
read within green band. Note: fail safe is open
and pressure reaches Demand Valve. Turn off
N
2
O cylinder valve. Verify that N
2
O E-Stand
gauge reads about 750 psi (50 bar). Note exact
needle position. Verify that there is little or no
movement [up to ½ increment] of the exact
needle position in 15 minutes. Nitronox N
2
O
line pressure gauge needle will stay in green
band with no movement. Turn off O
2
cylinder
valve. It is normal that needle of O
2
E-Stand
gauge will drop. Nitronox O
2
line pressure
gauge needle will stay in green band with no
movement (will eventually drop after E-Stand
gauge pressure naturally depletes).
4.
Whistle Alarm Actuator Adjustment:
Remove UPPER CHROME PLUG from case
back (Fig. 25). With mixture pressure
temporarily adjusted (per Step 2,
“Maintenance”) in middle of range shown (Fig.
26), insert 1/8” hex key (not provided) into
adjustment screw at end of ALARM
ACTUATOR. Adjust screw either clockwise or
counterclockwise until whistle sounds clearly.
DO NOT over adjust. Return mixture pressure
to middle of green band. Whistle sound must
stop with pressure in green band and whistle
must sound with pressure in range shown in
Fig. 26 (about 40 psi [2.8 bar]). If this cannot be
achieved, discontinue use of apparatus and
notify authorized distributor immediately.
Temporary
mixture pressure
adjust range
Fig. 24
18
Fig. 25 Back of Case; Upper adjustment access
Fig. 26
Alarm
Actuator
