Daikin LRMEQ4BY1 Installer And User Manual page 23

8 Set the target evaporating temperature with settings [2‑0] and
[2‑1] (see "7.2.8 Mode 2: Field settings" on
9 Turn on the power of the indoor units.
10 Turn on the operation switch.
Result: The unit will start operation.
INFORMATION
▪ When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to
codes when charging refrigerant" on page 24
solve the malfunction accordingly.
▪ Aborting the manual refrigerant charge is possible by
turning OFF the operation switch. The unit will stop and
return to idle condition.
11 Check the sight glass of the outdoor unit. If the refrigerant is
NOT in sealing state, charge extra refrigerant as described in
the "Charging refrigerant (with the compressor running)"
instructions, but do NOT exceed 25% of the determined
additional refrigerant amount (see
additional refrigerant amount" on
b
a
O Sealing state (= sufficient refrigerant)
X Insufficient refrigerant
a Sight glass
b Full of liquid
c A little foam in the liquid
d A lot of foam in the liquid
12 Turn off the operation switch.
Charging refrigerant (with the compressor running)
The remaining additional refrigerant charge can be charged by
operating the outdoor unit.
13 Connect as shown. Make sure valve A is closed.
p < p >
A B
g
f
a
d
C
N2
b c e
a Pressure reducing valve
b Nitrogen
c Weighing scales
d Refrigerant R410A tank (siphon system)
e Vacuum pump
f Liquid line stop valve
g Gas line stop valve
A Valve A
B Valve B
C Valve C
14 Open the gas line stop valve all the way and adjust the opening
of the liquid line stop valve.
15 Take all the precautions mentioned in
page 28 and "8 Commissioning" on page 31
16 Turn on the power of the outdoor unit, but leave the operation
switch turned off (see "6.8.6 To connect the electrical wiring on
the outdoor unit" on page 26).
17 Set the target evaporating temperature with settings [2‑0] and
[2‑1] (see "7.2.8 Mode 2: Field settings" on
18 Turn on the power of the indoor units.
19 Turn on the operation switch.
LRMEQ+LRLEQ3+4BY1
Air-cooled refrigeration condensing unit
4P500362-1A – 2018.09
page 30).
"6.7.5 Error
and
"6.7.3 To determine the
page 22).
c d
"7 Configuration" on
into account.
page 30).
Result: The unit will start operation.
INFORMATION
▪ When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to
codes when charging refrigerant" on page 24
solve the malfunction accordingly.
▪ Aborting the manual refrigerant charge is possible by
turning OFF the operation switch. The unit will stop and
return to idle condition.
20 Open valves B and C.
21 Charge refrigerant until the remaining determined additional
refrigerant amount is added (see
additional refrigerant amount" on page
valves C and B.
INFORMATION
▪ When there is little refrigerant remaining in the cylinder,
the cylinder's internal pressure will drop, making it
impossible to charge the unit, even if the opening of the
liquid line stop valve is adjusted. If this is the case,
replace the cylinder with one that has more refrigerant
remaining.
▪ If the piping length is long, replenishing while the liquid
line stop valve is fully closed may lead to activation of
the protection system, causing the unit to stop
operation.
22 Check the sight glass of the outdoor unit. If the refrigerant is
NOT in sealing state, charge extra refrigerant, but do NOT
exceed 25% of the determined additional refrigerant amount
(see "6.7.3 To determine the additional refrigerant amount" on
page 22)
b
a
O Sealing state (= sufficient refrigerant)
X Insufficient refrigerant
a Sight glass
b Full of liquid
c A little foam in the liquid
d A lot of foam in the liquid
23 Turn off the operation switch.
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
NOTICE
Thread-locking fluid. Before reattaching the service port
cover, apply thread-locking fluid to the screw thread (NOT
to the cover or sealing part). Otherwise, condensation
water might enter and freeze. Possible consequence:
Deformation, refrigerant
malfunction.
a
b
c
a Cover (do NOT apply thread-locking fluid)
b Sealing part (do NOT apply thread-locking fluid)
6 Installation
"6.7.5 Error
and
"6.7.3 To determine the
22), and then close
c d
leakage and compressor
Installer and user reference guide
23