Types 749B and R130
6
4.
Close the right side of the container valve and
open the left side container valve. Loosen
the adjusting screw nut (key 1) on the left side
manifold regulator. Rotate the left side adjusting
screw (key 5) clockwise to increase the reserve
pressure or counter clockwise to decrease the
reserve pressure.
5. I
MPORTANT:
Set both manifold regulators to
the same reserve pressure setting. Tighten both
adjusting screw nuts (key 1).
6. The indicator should show all red at the reserve
setting desired.
Replace the supply handwheel (key 3). The
indicator should show all silver.
If the reserve setting exceeds 8 psi / 0.55 bar,
then the Type 803-21 indicator may not operate
with the desired range. If the indicator does not
show all red at the reserve pressure or all silver at
the supply pressure, then some adjustment to the
indicator will be required, or a pressure gauge will
have to be installed in place of the indicator.
7. See Figure 4. To adjust the indicator remove
the screw (key 6) and the lens (key 3). Using
a small slotted screw driver, turn the adjusting
screw clockwise to increase the pressure or
Figure 4.
Indicator Assembly Drawing
T20923
APPLY LUBRICANT (L)
To Change Settings in the Field:
See Figure 3.
1. Remove both the supply handwheel (key 3)
and reserve cap (key 4) from 1st stage
manifold regulators.
2. Install a pressure gauge on the outlet side of the
manifold, ahead of any final stage regulator.
3.
Close the left side of the container shutoff valve.
Loosen the adjusting screw nut (key 1) on the
right side manifold regulator. Rotate the right side
adjusting screw (key 5) clockwise to increase the
reserve pressure or counter clockwise to decrease
the reserve pressure. Monitor the manifold outlet
pressure with the pressure gauge. Reserve
pressure range should remain within the limits
specified in Table 1.
!
WARNING
Exceeding the reserve limits specified
in Table 1 for a given spring will prevent
the manifold regulator from being able
to produce the desired supply side
pressures and could cause the loss of
pressure control on the supply side.
L
8
7
5
12
20
6
3
4
1
2
9