Installation Instructions - Johnson Controls YORK ERJC-22 Instrucciones De Instalación

Installation Instructions

Inspection
Upon reception, inspect the merchandise
and notify both the carrier and the insur-
ance company, in writing, of any possible
damage.
Environmental protection
Eliminate packing in accordance
with the regulations in force on
environmental conservation.
During installation and mainte-
nance, keep in mind that HFC and mineral
POE are used.
Contains greenhouse effect fluorided gas
covered by the Kyoto protocol.
For the type of gas and quantity per system,
see the identification plate.
GWP (Global Warming Potential) : 2088.
Warning signs
These signs on the unit indicate potentially
dangerous conditions, and their meaning
should be taken into account.
Fig. 1
This symbol indicates an electrical risk or
danger.
Fig. 2
Attention: The unit is equipped with remote
control and can start automatically. Two
minutes prior to having access to the interior,
disconnect the power supply so as to avoid
any contact with the fan turbine in motion.
Fig. 3
Attention: It is obligatory to read the instruc-
tions prior to any handling.
Fig. 4
Attention: Fan in operation.
Fig. 5
Attention: Do not touch hot surfaces.
Fig. 6
Attention: Possible gas leak due to inad-
equate handling.
Safety
Installation and maintenance operations
of this air conditioning system should be
carried out only by qualified and expert per-
sonnel. Periodical maintenance operations
should be carried out, such as cleaning the
coils and air filters, so as to keep unit per-
formance at an optimum at all times.
Caution
This unit should be installed and
used in accordance with:
- Low Voltage Electrotechnical
Regulations.
- Safety Regulations for Cooling Plants and
Installations.
- Regulations on Pressure Equipment.
- Basic Construction Standards.
10
- Technical Construction Standards.
- Local ordinances.
Location
(Fig. 7 to 9)
To be installed directly outdoors. Place the
unit on a consistent base and fasten by
means of bolts.
Outdoor units
These units are supplied with an adequate
R-410A refrigerant load for an intercon-
necting :
ERJC-22 ERJC-24
Precharge
5
length (m)
Additional
charge g/m
Installation
Unit installation comprises:
- Unit mounting.
- Refrigerant tubing connections.
- Condensed water drain connections in
heat pump units.
- Unit wiring.
Clearances, outdoor unit
A minimum clearance is required around
the units for the circulation of air and easy
access for maintenance servicing.
Interconnection of the units
When installing Split units, the cooling circuit
should be completely airtight after mounting
to insure there are no leaks.
This will help to obtain maximum perform-
ance with minimum consumption, and avoid
serious damage to the unit. This is an eco-
logical precaution as well.
Installation of interconnecting
tubing
The outdoor unit is comprised of two cooling
circuits and two independent compressors.
Each circuit feeds one indoor unit.
The length of the interconnecting tubing of
the units should be as short as possible.
The maximum admissible distances with
the circuit and standard tubing diameter are
those indicated in each one of the sections
on the corresponding indoor units.
Tubing to be used
Special care should be taken that the tub-
ing that interconnects the two units is kept
clean and dry, even prior to installation. It is
advisable to take into account the following
recommendations:
- Use copper refrigerant quality tubing
only.
GB
- Do not work outdoors when raining.
- The ends of the tubing should remain
closed during installation.
- Do not leave dryer filters or the compres-
sor out in the open air.
- For welding use low melting point rods
with a 5% silver content, minimum.
- When welding and as long as the tubing is
hot, maintain a flow of dry nitrogen so as
to avoid internal rusting and scaling that
could cause contamination and obstruc-
tions.
- Do not use strippers on copper-copper
joints.
- Connection between units should be car-
ried out by means of the flaring method.
ERJC-28
Insulation of refrigerant tub-
ing
30 40
Due to the fact that the capillary tubing is in-
stalled in the outdoor unit, both the larger as
well as the smaller diameter tubes are in the
relative low pressure side of the system.
22
Consequently, to avoid condensed water
dripping on the floor, both tubes should be
insulated adequately. The thickness of same
should be at least 8 mm. See Fig. 10.
Emptying and dehydrating
Air does not act as a refrigerant since it
cannot be liquefied by the compressor. Any
air and humidity remaining in the cooling
system has undesirable effects, as indicated
below. Consequently, they should be elimi-
nated completely.
- High pressure increases.
- Consumed power supply increases.
- Equipment performance decreases.
- Water contained in the air could freeze
and block the capillaries.
- Water can cause corrosion of certain
parts of the circuit, and deterioration of
the compressor. See Fig. 11.
Process
In each circuit, with the valves closed:
1 - Connect a vacuum pump and service
pressure gauges.
2 - Carry out a vacuum of up to at least 50
microns.
3 - Detect leaks.
4 - Refrigerant load.