Daikin VRV IV RXYQ TYDN Series Engineering Data page 52

EDUS341411-N
NOTE
Play it safe. For protection of the printed circuit board, touch the con-
body before performing service.
17.3. Service mode operation
Refrigerant recovery operation/vacuuming operation is possible by
applying setting [2-21]. Refer to 13.2. Operating the push buttons and
mode 2.
When vacuuming/recovery mode is used, check very carefully what
should be vacuumed/recovered before starting. See installation manual
of the indoor unit for more information about vacuuming and recovery.
17.3.1. Vacuuming method
1 When the unit is at standstill, set the unit in [2-21]=1.
2
fully open. At that moment the segment display indication=t.01 and
and
3
4 Press BS3 to stop vacuuming mode.
17.3.2. Refrigerant recovery operation method
This should be done by a refrigerant reclaimer. Follow the same proce-
dure as for vacuuming method.
18. Caution for refrigerant leaks
18.1. Introduction
The installer and system specialist shall secure safety against
leakage according to local regulations or standards. The following
standards may be applicable if local regulations are not available.
The VRV System, like other air conditioning systems, uses R410A as
refrigerant. Nevertheless care must be taken to ensure that air con-
accordance to the local applicable regulations and standards.
43
Installation of Outdoor Units
Maximum concentration level
mum concentration of refrigerant is directly related to the humanly
occupied space in to which it could leak.
The unit of measurement of the concentration is lbs./ft.
weight in lbs. (kg) of the refrigerant gas in 1 ft.
occupied space).
Compliance to the local applicable regulations and standards for the
1
2
the refrigerant from the system).
Pay special attention to places, such as basements etc., where
refrigerant can stay, since refrigerant is heavier than air.
Procedure for checking maximum concentration
2 below and take whatever action is necessary to comply.
1 Calculate the amount of refrigerant (lbs. (kg)) charged to each
system separately.
Amount of refrigerant Additional charging
in a single unit system amount (amount of re-
+
(amount of refrigerant frigerant added locally
with which the system in accordance with the
is charged before leav- length or diameter of
ing the factory) the refrigerant piping)
NOTE
Where a single refrigerant facility is divided into 2 entirely independent
refrigerant systems then use the amount of refrigerant with which
each separate system is charged.
2
2007).
19. Disposal requirements
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
Installation Manual
-
3 (kg/m 3 ) (the
3 3
(1 m ) volume of the
1
2
Total amount
=
of refrigerant
the system
3P362438-1B English
3P362438-1B
53