Technical Specifications - Johnson Controls YORK VIR-25A Instrucciones De Instalación

Economiser for VIR-25 to
90A
These instructions give the necessary infor-
mation for correct installation, at the job site,
of the economiser dampers.
The economiser is located in the return sec-
tion of the VIR indoor unit (see Fig. 1).
The control board, cables and all material
necessary for installation are supplied with
this accessory.

Technical specifications

This accessory includes the return and
outdoor air dampers and a drive motor with
a return spring modulated by temperature
control (enthalpy probes optional).
This accessory is comprised of:
- Damper assembly, with motor, for outdoor
air.
- Damper assembly, with motor, for return
air.
- Control board, plastic partitions and pro-
tecting cover.
- Temperature sensors for return and out-
door air and air impulsion.
- Wiring assembly, ready for connection to
unit wiring.
- A set of panels and supports.
- Screws and wall hole guides for assem-
bly.
Installation
Turn main power supply to the unit off by
means of main switch Q1.
Prior to installing the economiser it is in-
dispensable to know how the outdoor air
duct will be connected at the job site. There
are two possibilities: Top or bottom duct
(Figs. 1 and 2).
Install the economiser as follows:
1. Assembly of outdoor air intake by means
of top duct (standard configuration. The
outdoor air damper will be at the top, and
the economiser spring should be con-
fronted the frame of the corresponding
VIR unit filter. To fasten, use the screws,
nuts and washers supplied. The panels
must be removed first so to insert the
screws. Fasten the upper frame in place
with 2 screws, and then the bottom
frame with two more screws. The motor
should be located to the left of the access
door.
2. Assembly of the outdoor air damper at
bottom duct. Remove the side supports
and fit them on the opposite side. Then
turn the unit fully around, as shown in
the figure. For coupling to the VIR indoor
unit, proceed as in the standard configu-
ration.
3. Position of the of dampers. The stand-by
position of the dampers is: outdoor air
closed and return air, open. Check the
position of the dampers.
4. Connection of the economiser control
board wiring. Connect the economiser
cables as shown on the wiring diagram:
power supply cables (J17, 580 and 581),
accessory communication cable (J16,
700), motor cables (R-red, C-black,
0-10V-grey), return probe (J13-black)
and impulse probe (J6-yellow).
5. Assembly of return, outdoor and impulse
air temperature sensors. Depending
upon the assembly of the dampers, it is
advisable to install the sensor supports
as well as the return (B15), outdoor
(B17) and impulse (B16) air temperature
sensors at a distance of at least 1 m.
from the mouth of the duct connected
to the machine.
6. Assembly of enthalpy probe, Ref. C7400A
(option not applicable). The enthalpy
probes cannot be installed with the VIR
unit economiser.
7. J19, J20 and ENTALP jumper selection.
- J19 jumper: Open by default, selects
economiser operation. If closed, selects
motor-driven damper operation.
- J20 jumper: Open by default, selects
outdoor damper closed with high tem-
perature/smoke alarm. If closed, selects
outdoor damper open with high tempera-
ture/smoke alarm.
- ENTALP jumper, S2: Open by default,
selects operation without enthalpy
probes.
8. Configuration of economiser control
board and adjustment of minimum open-
ing.
Once this accessory is fitted, along
with the necessary elements, the unit
is powered on once again. Make sure
the green LED (V1) of the economiser
control board (A4) is on permanently.
To carry out a search and configuration
of accessories, press the test button
on the Yklon board (A1) located on the
outdoor machine for over three seconds,
until the red LED goes on. Once this
search and configuration process be-
gins, the red LED goes on and stays on
until this operation is over. Once it goes
off, make sure the green LED (V1) of the
economiser board is flashing to indicate
the accessory has been configured.
A potentiometer, P1, on the economiser
board allows modulating the damper
manually to check its operation. The
damper will go back to its operating
position after 30 seconds. As long as
the indoor fan is on, the damper will be
open proportionally to renew air circula-
tion. Factory set default value is 10%.
This minimum percentage can be set by
means of potentiometer P1, or through
the communication network. To set it
with the potentiometer, set the minimum
value until the minimum opening is
reached, and then press configuration
button SW1 for 3 seconds to store this
value.
GB
9. Air quality probe (optional).
The air quality probe is equipped with a
VOC (volatile organic compounds) sen-
sor that compares the VOC concentra-
tion in the air with the sensor set point.
If this concentration is greater, the probe
activates outlet Y1 by means of a relay.
The 230 VAC outlet signal between Y1
and N connects to the 230 VAC to 5VDC
conversion board. This board is to be fit-
ted next to the economiser control board
and the 5 VDC signal cable should be
connected to J18 on the economiser
board.
If the room thermostat temperature set
point is satisfied and there is a call for
air quality, the damper opens to minimum
programmed renovation and the indoor
fan turns on. Then the damper opening is
increased in accordance with the maxi-
mum (30° C) and minimum (12° C) im-
pulse temperatures. If the air quality call
signal disappears, or if the thermostat
calls for air quality, or if the thermostat
calls for cool or heat, the damper goes
back to minimum renovation. If there
is no call from the thermostat and the
indoor fan is in auto mode, the fan turns
off and the dampers close.
The probe can select three levels of air
quality, depending upon the position of
the jumper:
Air quality probe
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Caution:
Loose cables can cause overheat-
ing of terminals or incorrect opera-
tion of the unit. Fire hazards may
also exist. Therefore, make sure all cables
are connected tightly.
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