Installation Instructions; General Information; Technical Specifications - Johnson Controls York D4IC-360 Instrucciones De Instalación

Installation Instructions

General information

The condensation control accessory (Low
Ambient Kit) is factory-fitted as an option.
The electronic module controls the outdoor
fan speed in cool cycle to keep the con-
densing pressure constant at low outdoor
temperatures. This control is not carried
out in the winter cycle, and fans operate at
100% capacity.
The regulator is located on the lower right
area of the electric box and the pressure
switches on the compressor side.

Technical specifications

This accessory includes the following com-
ponents:
- Three-phase speed regulator, ref. PXD-
M15A (LAK).
- Pressure switch, ref. MGB301 (HP11,
HP12 and HP13).
- 24 VAC terminal relay (RRV1, RRV2 and
RRV3). For B4IH only.
- Connecting hose and cables.
- Support sheet, screws and plastic flang-
es.
Installation
Disconnect main power supply to the unit
with switch Q1. See Figs. 1, 2, 3 and wiring
diagram for details on assembly and wiring
connections.
Install the condensation control unit as fol-
lows:
1. Open access panels to the electric box
and compressors.
2. Install the regulator support in the bottom
part of the electric box, on the right side,
with the screws supplied. Then fasten
the regulator. On heat pump models
B4IH-360 and 480, install 24 VAC relays
(RRV1, RRV2 and RRV3) on connecting
strip X2 and connect cables from con-
tacts 11 and 14 to LAK intake D1.
3. Install automatic switch F12 on the corre-
sponding guide X3 and connect cables
as per the wiring diagram. Disconnect
and eliminate cables 107, 108 and 109
between F1 and F5. Disconnect cables
119, 120, 121, 131, 132 and 133 from
F2 and F3 side. Connect cables 119, 120
and 121 between F5 and F6. Connect
cables 131, 132 and 133 between F6
and F7. Connect supplied cables 12, 13
and 14 between F12 and F7 (or F8 on
models 480).
4. Install and connect power supply hoses
F12-LAK and F7 (or F8)-LAK as per the
wiring diagram.
5. Install protection hose of automatic
switch F12 on terminals TK of LAK.
6. Install the connecting hose of the AWV-2
and the LAK modules as per the wiring
diagram.
7. Connect the pressure switches to the
corresponding circuit intake and make
sure there is no leakage. Make sure
that the HP11, HP12 and HP13 pres-
sure switch connection corresponds to
circuits 1, 2 and 3 and to compressors 1,
2 and 3, respectively. Connect the cables
on the electric box side and pressure
switches as per the wiring diagram. Con-
nect high pressure gauges to the three
circuits.
8. Check correct operation. The PXDM15A
regulator is factory-set for correct opera-
tion. Disconnect the magneto thermal
switches of compressors 1, 2 and 3 (F1,
F2 and F3).
Connect power supply to the unit with
switch Q1. Activate stage 1 of cool and
make sure contactors KM1, KM4 and
KM5 are enabled. The outdoor fan, M5,
should be off. Connect magneto thermal
switch F1 and compressor 1 will start.
Make sure that the pressure of approxi-
mately 14 bar starts to increase outdoor
fan revolutions.
9. Activate stage 2 of cool and repeat the
previous process for circuit 2. Then do
GB
the same for circuit 3. (On models 480,
the third stage controls fans M7 and
M8.)
10. If the unit is heat pump (B4IH), activate
stages 1, 2 and 3 of heat and make
sure outdoor fans M5, M6 and M7 (M8
model 480) rotate at 100%. Deactivate
the stages.
11. Disconnect the pressure gauges and
close the access panels.
Loose cables can cause over-
heating of terminals or incorrect
operation of the unit. Fire haz-
ards may also exist. Therefore,
make sure all cables are con-
nected tightly.
Operation
In summer cycle, allows adjusting outdoor
fan speed to keep a constant condens-
ing pressure at low outdoor temperatures
(-18°C).
Heat pump models, the control has a digital
intake D1 that, in heat cycle, remains closed
through the contact on the cycle changeover
relay (RRV1, RRV2 and RRV3). Fan speed
at maximum.
Also has another digital intake D2 that allows
changing pressure set points for going from
day (open) to night (closed) operation with
the volt-free contact of a clock timer.
The regulator is factory-programmed as
follows:
- Operating mode 3.03.
- Intake jumpers E1 and E2 in pressure
operation 4-20 mA.
- SET 1 (DAY) 14 bar... 19 bar.
- SET 2 (NIGHT) 16 bar... 21 bar.
- DIF (P BAND) 5 bar.
- Digital input D1 - D1 function 7D regulation
(open) and 100% (closed).
- Digital input D2 - D2 function 5D. Day
(open) and night (closed).
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