Johnson Controls JX Series Engineering Manual page 2

FORM 121.00-EG1
ISSUE DATE: 5/31/2012
READ BEFORE PROCEEDING!
This equipment is a relatively complicated apparatus.
During installation, operation maintenance or service,
individuals may be exposed to certain components or
conditions including, but not limited to: refrigerants,
materials under pressure, rotating components, and
both high and low voltage. Each of these items has the
potential, if misused or handled improperly, to cause
bodily injury or death. It is the obligation and respon-
sibility of operating/service personnel to identify and
recognize these inherent hazards, protect themselves,
and proceed safely in completing their tasks. Failure
to comply with any of these requirements could result
in serious damage to the equipment and the property in
which it is situated, as well as severe personal injury or
death to themselves and people at the site.
This document is intended for use by owner-authorized
operating/service personnel. It is expected that these
individuals possess independent training that will en-
able them to perform their assigned tasks properly and
safely. It is essential that, prior to performing any task
on this equipment, this individual shall have read and
understood this document and any referenced mate-
rials. This individual shall also be familiar with and
comply with all applicable governmental standards and
regulations pertaining to the task in question.
CHECK OF DENSITY LIMIT
The room in which the air conditioner is to be in-
stalled requires a design that in the event of refrig-
erant gas leaking out, its density will not exceed a
set limit.
The refrigerant (R410A), which is used in the aircon-
ditioner, is safe, without the toxicity or combustibil-
JOHNSON CONTROLS
IMPORTANT!
GENERAL SAFETY GUIDELINES
ity of ammonia, and is not restricted by laws imposed
to protect the ozone layer. However, since it contains
more than air, it poses the risk of suffocation if its den-
sity should rise excessively. Suffocation from leakage
of refrigerant is almost non-existent.
With the recent increase in the number of high density
buildings, however, the installation of multi air condi-
tioner systems is on the increase because of the need
for effective use of floor space, individual control, en-
ergy conservation by curtailing heat and carrying pow-
er, etc. Most importantly, the multi air conditioner sys-
tem is able to replenish a large amount of refrigerant
compared to conventional individual air conditioners.
If a single unit of the multi air conditioner system is
to be installed in a small room, select a suitable model
and installation procedure so that if the refrigerant ac-
cidentally leaks out, its density does not reach the limit
(and in the event of an emergency, measures can be
made before injury can occur).
ASHRAE and the International Mechanical Code of
the ICC as well as CSA provide guidance and define
safeguards related to the use of refrigerants, all of
which define a Refrigerant Concentration Level (RCL)
of 25 pounds per 1,000 cubic feet for R410A refriger-
ant. For additional guidance and precautions related to
refrigerant safety, please refer to the following docu-
ments:
International Mechanical Code 2009 (IMC-2009) (or
more recently revised)
ASHRAE 15
ASHRAE 34
2