Installation Instructions - Johnson Controls YORK ENJC-09 DT Instrucciones De Instalación

Installation Instructions

Inspection
Upon reception, inspect the equipment
and notify both the carrier and the insur-
ance company, in writing, of any possible
damage.
Environmental protection
Eliminate packing in compliance
with the regulations on environmen-
tal conservation in force.
During installation and maintenance, keep in
mind that HFC-410A with POE oil is 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.
Safety
Installation and maintenance operations
of this air conditioning system should be
carried out by qualified and expert person-
nel only. Regular maintenance operations
should be carried out, such as cleaning
the coils and air filters, so as to keep unit
performance at an optimum.
Caution
This unit should be installed and
used in compliance with:
- Low Voltage Electrotechnical
Regulations.
- Safety Regulations for Cooling Plants and
Installations.
- Regulations on Pressure Equipment.
- Basic Construction Standards.
- Technical Construction Standards.
- Local laws.
Location
(Figs. 1 to 3)
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 R-410A
Limits of use
Intake air temperature to the outdoor coil, DB
Minimum °C
Cool Heat
-7 -7
Notes: WB = Wet bulb. DB = Dry bulb. (1) This equipment can operate at a temperature out of limits for a short period of time, until the occupied space is conditioned.
refrigerant charge, which is sufficient for an
interconnecting piping length of 5 meters.
Each unit includes a connecting elbow for
the condensed water drain.
Installation
Unit installation comprises:
- Unit mounting.
- Refrigerant piping connections.
- Condensed water drain connections.
- Unit wiring.
Clearances, outdoor unit
A minimum clearance is required around
the units for the circulation of air and access
for maintenance servicing, as indicated in
General Dimensions.
Interconnection of the units
When installing Split units, make sure the
cooling circuit is completely leakproof 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.
Installing interconnecting
pipes
The length of the interconnecting pipes of the
units should be as short as possible.
Maximum admissible distances from the
circuit and the standard piping diameter are
shown on each one of the sections of the
corresponding indoor units.
Pipes to be used
Special care should be taken to make sure
that the pipes that interconnects the two
units is kept clean and dry, even prior to in-
stallation. It is advisable to take into account
the following recommendations:
- Use copper refrigerant quality pipes only.
- Do not work outdoors when raining.
- The ends of the pipes should remain
closed during installation.
- Do not leave neither the filter-dryers nor
the compressor out in the open air.
Operating cycle
Maximum °C
Cool
43
Minimum °C
Heat Cool WB
24 19
GB
- For welding use low melting point rods with
a minimum 5% silver content.
- When welding and as long as the pipe 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 to units should be carried out
by means of the flaring method.
Insulation of refrigerant pipes
To avoid the influence of outdoor tempera-
tures, radiation and condensation, the pipes
should be insulated. Minimum thickness
should be 8 mm.
Emptying and dehydrating
(Fig. 5)
Air does not act as a refrigerant since it can-
not be liquefied by the compressor. Any air
and humidity remaining in the cooling system
has undesirable effects, as indicated below.
Consequently, they must be eliminated
completely.
- High pressure increases.
- Power consumption 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.
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 200
microns.
3- Detect leaks.
Intake air temperature to the indoor coil
Operating cycle
Maximum °C
Heat DB Cool WB
20 23
(1) (1)
Heat DB
27
11