York YDAJ87KU6, Руководство пользователя

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FORM 150.75-NM2
95
YORK INTERNATIONAL
BAS INTERFACE
(REMOTE RESET OPTION)
The Remote Reset Option allows resetting of the water
temperature setpoint using a 0-10 VDC input, a 4-20
mA input, or a dry contact. The electronic circuitry in
the option converts the signals mentioned, above into
pulse width modulated (PWM) signals which the micro-
processor can understand. Whenever an offset is called
for, the change may be noted by the user by pressing
the REMOTE RESET TEMP/RANGE key on the key-
pad. All refresh requirements normally associated with
PWM inputs will be automatically taken care of by the
electronics in the option.
It is important to note that the maximum offset, when
this option is installed, is 20°F. This is due to the elec-
tronics’ limitation of maximum 11 sec. pulse. If a greater
than 20°F offset is required, a user supplied PWM sig-
nal of up to 21 sec. is needed and the Remote Reset
Option cannot be installed.
The Remote Reset Option P/N 471-01232-181 consists
of a Remote Reset printed circuit board, a mounting
bracket and associated wiring. Each of the 3 signal types
will require individual jumpering of the printed circuit
board. This will be discussed in the following text. A
single kit is required. The Remote Reset Board must
be installed in the Master Module Control Panel.
0-10 VDC
Jumpers JU2 and JU4 must be IN. All other jumpers
should be OUT. Program the REMOTE RESET TEMP
RANGE (page 75) for 40°F which will allow a 20°F off-
set with an input of 10 VDC. The temperature will be
offset linearly according to the voltage (0-10 VDC) ap-
plied.
The 0-10 VDC signal should be connected to the + and
– terminals on the TB3 Terminal Block at the right of
the microprocessor board. Be sure polarity is correct.
CAUTION: THE 0-10 VDC INPUT SIGNAL WIRING
MUST NOT BE EARTH GROUNDED!
4-20mA
Jumpers JU3 and JU5 must be IN. All other jumpers
should be OUT. Program the REMOTE RESET TEMP
RANGE (page 75) for 40°F which will allow a 20°F off-
set with an input of 20mA. The temperature will be off-
set linearly according to the current (4-20mA) applied.
The 4-20mA input signal should be connected to the +
and – terminals on the TB3 Terminal Block at the right of
the Microprocessor Board. Be sure polarity is correct.
CAUTION: THE 4-20mA INPUT SIGNAL WIRING
MUST NOT BE EARTH GROUNDED!
Dry Contact
A dry contact may also be used to offset temperature.
This allows a single offset whenever the contact is
closed. The offset is determined by the adjustment of
the R11 potentiometer on the Remote Reset Board.
Adjust the potentiometer as needed to obtain the de-
sired offset.
Jumper JU1 must be IN. All other jumpers must be OUT.
Program the REMOTE RESET TEMP RANGE (page
75) for 40°F which will allow the R11 pot to be adjusted
for an offset of as much as 20°F when the contact is
closed.
The dry contact should be connected directly to the P1-1
and P1-2 terminals on the Remote Reset Board (Fig. 48).
NOTE: The coil of the controls used for reset must be
suppressed. Use YORK P/N 031-00808-000
suppressor.
The Remote Setpoint Reset will not operate
when a Remote Control Center Option is con-
nected to the micro panel. The Remote Con-
trol Center will always determine the setpoint.
FIG. 48 – REMOTE RESET BOARD
LD01956