Johnson Controls T-5800 Series, Установка и калибровка, Страница: 9 / 12

T-5800-3/T-5800-4 Technical Bulletin 9
in order for the system to have
normal proportional plus integral
control.
The T-5800-4 has an
automatic/manual integral
control cutout feature when the
fan “F” connection is used. This
feature keeps the system from
going out of control on startup
(after it’s been off for some time)
by allowing the system to start
up using proportional-only
control. If it is determined that
there is not a need for the cutout
feature, cap the unused fan “F”
connection. Doing so will allow
normal proportional plus integral
control of the system at all
times, provided that the P/PI
jumper is connected.
With the supply air ON, balance
the receiver-controller by setting
the following:
•
Pull the P/PI jumper off of its
spigot so that the receiver-
controller will operate as a
proportional-only controller
(no integral function).
•
Adjust the local set point dial
or the remote adjuster
(manual or automatic) to
produce 9 PSIG (63 kPa)
using the appropriate
method and gage as
described previously.
•
Install the ratio selection
jumper in the correct position
(see Fig. 15). If the
calculated ratio is less than
or equal to 2.5:1 (as is the
case with the example where
the calculated ratio is 2:1),
the jumper should be
installed in the 1:1 position.
If the calculated ratio is
greater than 2.5:1, the
jumper should be installed in
the 3:1 position.
•
Turn the ratio dial so that
“1:1 (3:1)” imprinted on the
dial lines up with the dial
reference point.
Receiver-Controller Preset
(See Example Fig. 6)
Utilize one of the pressure
checking methods described
previously to obtain a master “M”
input pressure reading, a master
balance “R” pressure reading,
and a controlled variable “CV”
input pressure reading.
1. Apply a master “M” input
pressure equal to the
midpoint of the desired
working range (Example:
30
°
F on a 0 to 60
°
F working
range or 7.2 PSIG as
highlighted in Fig. 12).
2. Rotate the master balance
screw (see Fig. 10) located
in the center of the receiver-
controller (clockwise to
increase or counterclockwise
to decrease) to produce a
9 PSIG (63 kPa) gage
reading at the master
balance “R” reference.
Doing so will shift the
working range (internally) to
a more linear portion of the
ratio circuit.
3. Vary the master input from
minimum to maximum over
its working range (Example:
0 to 60
°
F or 5.4 to 9 PSIG
per Fig. 6). Note: The
master “M” INPUT is
limited to not less than
2 PSIG nor greater than
17 PSIG. Note the pressure
readings at the master
balance “R” reference
corresponding to these
minimum and maximum
points.
If the minimum master
balance “R” pressure noted
above is greater than or equal
to 5 PSIG and the maximum
master balance “R” pressure
is less than 19 PSIG (with a
20 PSIG supply), no further
adjustments are required. If
the minimum master balance
“R” pressure is less than
5 PSIG, rotate the master
balance screw (clockwise to
increase) so that the minimum
pressure is greater than
5 PSIG and the maximum
does not exceed 19 PSIG.
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
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 the midpoint