Installation Instructions; General Information; Technical Specifications - Johnson Controls YORK RTC 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 separator
panel, on the outdoor fan side (M3).
With this accessory the outdoor air operating
limit is -10°C.

Technical specifications

This accessory includes the following com-
ponents:
- Single-phase speed regulator, ref. P215DP
(LAK).
Cut-off regulation.
- Pressure switch set to 30 bar.
- 24 VAC terminal relay (RRV1) for RTH.
- Connecting hose and cables.
- Screws, wall hole guide and plastic
flanges.
Installation
Disconnect main power supply to the unit
with switch Q1. See Figs. 1, 2, 3, 4, 5 and
wiring diagram for details on assembly and
wiring connections.
Install the condensation control unit as fol-
lows:
1. Remove the top cover and access panels
to the outdoor fan.
2. Install the speed regulators (LAK) on
the separator panel, using the screws
supplied. On heat pump models (RTH),
connect the 24 VAC relay (RRV1) to
terminal X3.
8
3. Connect cables inside the electric box in
accordance with the wiring diagram.
4. Disconnect the outdoor fan (M3) hose
from the KM3 contactor side, and con-
nect same to the LAK side at terminals
L2, N2 and ground. Connect the supplied
outdoor fan hose to contactor KM3 on
the electric box and connect terminals
L1, N1 and ground to the LAK side.
5. Connect the control hoses of heat pump
models (RTH) to terminals 11 and 14 of
the RRV1 relay and on the LAK side of
terminals 1 and 3.
6. Install the wall hole guide on the separa-
tor panel and insert the pressure switch
pressure intake.
7. Connect the pressure intake of the pres-
sure switch to the high pressure intake
at the condenser outlet and make sure
there are no leaks.
8. Check correct operation. Set maximum
fan output regulation (LAK) and discon-
nect the magneto thermal switch of the
compressor (F1). Connect power supply
to the unit with switch Q1. Activate stage
1 of cool and make sure contactors KM1,
KM2 and KM3 are enabled. The outdoor
fan, M3, should rotate 100%. With a
voltmeter, check the output voltage (230
VAC) at terminals L2 and N2 of the LAK1
regulator. Set output to a minimum (cut-
off). Make sure the outdoor fan turns
off.
9. If the unit is heat pump (RTH), activate
stage 1 of heating and make sure the
outdoor fan M3 rotates 100%.
Deactivate this stage.
GB
10. Connect the magneto thermal switch to
the compressor (F1).
11. Replace the top cover and the access
panel to the outdoor fan.
Warning
Loose cables can cause
overheating of terminals
or incorrect operation
of the unit. Fire hazards
may also exist. Therefore,
make sure all cables are
connected tightly.
Operation
In summer cycle, allows adjusting outdoor
fan speed to keep a constant condensing
pressure at low outdoor temperatures. The
pressure switch is factory-set to 30 bar. This
setting can be modified with the adjusting
screw on the pressure switch. Clockwise
increases pressure and counter clockwise
decreases pressure.
On heat pump models, the control has an
intake that, in heat cycle, remains closed
through the contact on the cycle changeo-
ver relay (RRV1). Fan speed at maximum
(output voltage 230 VAC).