T-5800-3/T-5800-4 Technical Bulletin 7
4.
After removing the pressure
checking method from the
master balance “R”
reference, it is suggested
that the master balance
screw be sealed (using a
small dab of fingernail
polish).
5.
Return the master “M” input
pressure to the midpoint of
the desired working range
(Example: 30
°
F or 7.2 PSIG
on a 0 to 60
°
F working
range per Fig. 6).
6.
Apply a controlled variable
“CV” input pressure to the
value corresponding to the
value 7.2 PSIG master “M”
input setting (Example:
140
°
F or 9 PSIG per Fig. 6).
7.
Rotate the ratio dial (see
Fig. 13) to a position which
most closely represents the
required ratio setting
(Example: 2:1, outer scale
on dial and jumper in 1:1
position).
8.
Adjust the local set point
dial or the remote adjuster
(manual or automatic) to
produce an output pressure
on the controller gage equal
to the midpoint of the spring
range of the controlled
device.
Ratio and Set Point Checkout
1.
Apply the minimum master
“M” input pressure value
(Example: 0
°
F or 5.4 PSIG
per Fig. 6).
2.
Apply the corresponding
controlled variable “CV”
input pressure value
(Example: 200
°
F or
12.6 PSIG per Fig 6).
3.
Ratio Dial Adjustment:
Note: Never adjust the
ratio dial when the master
“M” Input pressure is at
the midpoint of its
working range (Example:
30
°
F on a 0 to 60
°
F range
or 7.2 PSIG per Fig. 12).
No output signal change
will occur because the
internal ratio circuitry is in
a balanced condition, and
any previous ratio dial
setting (if not marked) will
be lost.
Adjust the ratio dial to cause
the receiver-controller
output to be at a pressure
value which would produce
the required controlled
variable “CV” input
(Example: Direct acting T-
5800-3, N.O. heating valve
with a 3 to 7 PSIG spring
range; output should be
below the midpoint of the
spring range of the valve
which would produce the
required 200
°
F).
4.
Apply the maximum master
“M” input pressure value
(Example: 60
°
F or 9 PSIG
per Fig. 6).
5.
Apply the corresponding
controlled variable “CV”
input pressure value
(Example: 80
°
F or
5.4 PSIG per Fig. 6).
6.
Set Point dial Adjustment:
Adjust the set point dial to
cause the output pressure
to be at the opposite end of
the spring range of the
controlled device (Example:
Direct Acting T-5800-3, N.O.
heating valve with a
3 to 7 PSIG spring range;
output should be above the
midpoint of the spring range
of the valve which would
produce the required 80
°
F).
7.
Rotate the gain dial so that
“10:1” imprinted on the dial
lines up with the dial
reference point.
8.
The T-5800-3 is calibrated
and ready for system
operation.
Gain Adjustment (See Fig. 14)
Adjusting the gain dial will not
affect the controller set point;
however, the output pressure
may change when the gain dial
is adjusted. Increasing the gain
will narrow the throttling range
(decrease offset), allowing the
control point to be closer to the
set point. Decreasing the gain
will widen the throttling range,
forcing the control point away
from the set point.
Normally, having the gain arrow
set at the pointer represents a
reasonable gain adjustment
which would provide stability.
Increase the gain setting by
small increments until the
system becomes unstable and
begins to cycle. Decrease the
gain setting slightly to remove
the cycling effect. Doing so will
provide maximum controllability
with a minimum of offset.
Calibrating the T-5800-4
(see Fig. 15)
When connecting the T-5800-4
Receiver-Controller to an
operating system, the fan “F”
connection should either have
the “system in operation”
function signal (minimum of
12 PSIG) attached (example:
fan on-off or water circulation
pump on-off), or the connection
must be capped.
Pulling the P/PI jumper (see
Fig. 16) off of its spigot causes
the receiver-controller to operate
as proportional-only controller
(no integral function). The
jumper must be connected
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