58
FIGURE 43: 20 TON (241)
RKNL SYSTEM CHARGE CHARTS
20 TON, CIRCUITS 1 & 2
CIRCUIT 1
CIRCUIT 2
92-103943-03-00
BO TH CO M PRESSO RS M UST BE O PERATIN G BEFO RE CH ECKIN G
REFRIGERAN T CH ARGE.
BEFO RE FIN AL REFRIGERAN T CH ECK!
RETURN AIR TEM PERATURE M UST BE W ITH IN CO M FO RT CO N D ITIO N S
M EASURE PRESSURE AT CO M PRESSO R SUCTIO N AN D D ISCH ARGE.
MEASURE O UTD O O R AM BIEN T TO UN IT.
PLACE (X) O N CH ART W H ERE SUCTIO N AN D D ISCH ARGE IN TERSECT.
IF (X) IS BELO W O UTD O O R AM BIEN T LIN E, AD D CH ARGE AN D REPEAT
STEPS 1-3.
IF (X) IS ABO VE O UTD O O R AM BIEN T LIN E, RECO VER EXCESS CH ARGE
AND REPEAT STEPS 1-3.
CAUTIO N :
IN STRUCTIO N S:
O
U
T
D
O
O
R
A
M
B
IE
N
T
(
F
,
D
B
)
O
U
T
D
O
O
R
A
M
B
IE
N
T
(
F
,
D
B
)
115
105
95
85
75
65
55
175
200
225
250
275
300
325
350
375
400
425
450
475
500
525
100
105
110
115
120
125
130
135
140
145
150
155
160
165
115
95
85
75
65
55
175
200
225
250
275
300
325
350
375
400
425
450
475
500
525
100
105
110
115
120
125
130
135
140
145
150
155
160
165
SYSTEM CHARGE CHART - REFRIGERANT 410A
