Johnson Controls York MaxE YK Series, Manual

Page: 126 / 139

FORM 160.75-O1 (309)
27
JOHNSON CONTROLS
6
refrigerant charging
To avoid the possibility of freezing liquid within the
evaporator tubes when charging an evacuated system,
only refrigerant vapor from the top of the drum or cyl-
inder must be admitted to the system pressure until the
system pressure is raised above the point corresponding
to the freezing point of the evaporator liquid. For water,
the pressure corresponding to the freezing point is 8.54
PSIG (58.9 kPa) for R-134a (at sea level).
While charging, every precaution must be taken to prevent
moisture laden air from entering the system. Make up a
suitable charging connection from new copper tubing to
taBle 3 – REFRIgERANT CHARgE
evap code
cond
code
factory
charged
lbs.
AP
AP, AQ,
AR, AS
828
AQ 794
AR 739
AS 752
CP
Bw, Bx
1525
CQ 1460
CR 1400
CS 1400
CP
CP, CQ,
CR, CS
1221
CQ 1185
CR 1100
CS 1091
DP
DP, DQ,
DR, DS
1628
DQ 1580
DR 1466
DS 1455
EP
EP, EQ,
ER, ES, ET
1721
EQ 1718
ER 1635
ES 1574
ET 1474
EP
Iw, Ix
1805
EQ 1775
ER 1710
ES 1680
ET 1615
FQ
FQ, FR,
FS, FT
2162
FR 2160
FS 2099
FT 1966
gQ
EV, Ew, Ex
1990
gR 1899
gS 1808
evap code
cond
code
factory
charged
lbs.
HQ
FV, Fw, Fx
2626
HR 2506
HS 2385
JP
JP, JQ, JR,
JS
2557
JQ 2401
JR 2143
JS 2051
LQ
LQ, LR, LS
3175
LR 2857
LS 2734
KP
KP, KQ,
KR, KS
K2, K3, K4
2920
KQ 2742
KR 2490
KS 2384
KT 2992
KV 2808
Kw 2571
Kx 2462
K2 3146
K3 3065
K4 2983
K5 3248
K6 3165
K7 3081
MQ
uw, ux
u8, u9
3540
MR 3325
MS 3135
M2 3760
M3 3635
M4 3385
fit between the system charging valve and the fitting on
the charging drum. This connection should be as short as
possible but long enough to permit sufficient flexibility
for changing drums. The charging connection should be
purged each time a full container of refrigerant is con-
nected and changing containers should be done as quickly
as possible to minimize the loss of refrigerant.
Refrigerant may be furnished in cylinders containing
either 30, 50, 125, 1,025 or 1750 lbs. (13.6, 22.6, 56.6,
464 or 794 kg) of refrigerant.