3DJH
31-5000750 Rev. 1
8VH WKH :(,*+,1 PHWKRG IRU DGGLQJ LQLWLDO UHIULJHUDQW FKDUJH DQG WKHQ XVH 68%&22/,1* PHWKRG IRU IRU YHULI\LQJ
UHIULJHUDQWFKDUJH
Figure 52. Using HFC-410A Weigh-In Method
.
WEIGH-IN
Liquid Line
Set Diameter
HFC-410A
(ounces per foot)
5/16”
3/8”
1/2”
0.40
0.60
1.00
NOTE - The nameplate is shown for illustration purposes only. Go to
actual nameplate on outdoor unit for charge information.
CHARGING METHOD
NOTE - Insulate liquid line when it is routed through areas where
the surrounding ambient temperature could become higher than
the temperature of the liquid line or when pressure drop is equal
to or greater than 20 psig.
Amount specified
on nameplate
Adjust amount for variation in
line set length and liquid line
diameter using table below.
Total charge
+
=
64ºF (17.7ºC) and Below
Example
Factory charge for 3/8" is 0.60 oz/ft x 15 = 9.0 ounces.
Charging Formula for Liquid Line Charge Adjustments
Figure 51.
&KHFNLQJ,QGRRU$LUÀRZRYHU(YDSRUDWRU&RLOXVLQJ'HOWD7&KDUW
Cº
T
DROP
–
D
T
=
ºF
ACTION
53º
19
–
15
=
4
INCREASE THE AIRFLOW
58º
14
–
15
=
-1
(3º RANGE) NO CHANGE
62º
10
–
15
=
-5
DECREASE THE AIRFLOW
D
T
80
24 24 24 23 23 22 22 22 20 19 18 17 16 15
78
23 23 23 22 22 21 21 20 19 18 17 16 15 14
76
22 22 22 21 21 20 19 19 18 17 16 15 14 13
74
21 21 21 20 19 19 18 17 16 16 15 14 13 12
72
20 20 19 18 17 17 16 15 15 14 13 12 11 10
70
19 19 18 18 17 17 16 15 15 14 13 12 11 10
57 58 59 60 61 62 63 64 65 66 67 68 69 70
TEMPERATURE OF AIR
ENTERING INDOOR COIL ºF
INDOOR
COIL
DRY BULB
DRY
BULB
WET
BULB
B
T
DROP
19º
A
DR
Y-BULB
WET-BULB ºF
A
72º
B
64º
C
53º
AIR
FLOW
AIR
FLOW
ALL TEMPERATURES ARE
EXPRESSED IN ºF
1. DETERMINE THE DESIRED DT — MEASURE ENTERING AIR
TEMPERATURE USING DRY BULB (
A
) AND WET BULB (
B
).
D
T
IS THE INTERSECTING VALUE OF
A
AND
B
IN THE
TABLE (SEE TRIANGLE).
2.
FIND TEMPERATURE DROP ACROSS COIL
— MEASURE
ING THE COIL (
A
AND
C
). TEMPERATURE DROP FORMULA:
(
T
DROP
) =
A
MINUS
C
.
FERENCE BETWEEN THE MEASURED
T
DROP
SIRED
D
T
(T
DROP
–
D
T)
IS 3º, NO ADJUSTMENT IS
NEEDED. SEE EXAMPLE AT LEFT:
4.
ADJUST THE FAN SPEED
TIONS TO INCREASE/DECREASE FAN SPEED.
ASSUME
D
T
= 15 AND
A
TEMP. = 72º, BELOW
C
TEMPERATURES REQUIRE ACTION:
AIRFLOW
INDOOR COIL
TURES; RECHECK TEMPERATURES TO CONFIRM THAT THE
TEMPERATURE DROP AND
D
T ARE 3º.
Summary of Contents for GE NS22HM
Page 7: ...3DJH 31 5000750 Rev 1 Figure 2 Component Locations NS22H24MA4 and NS22H36MA4...
Page 58: ...3DJH 31 5000750 Rev 1 24 AND 36 HP MODEL Figure 24 Wiring Diagram Unit Wiring Diagram...
Page 78: ...3DJH 31 5000750 Rev 1 24 AND 36 HP MODEL Figure 45 VAC Voltage Check...
Page 103: ...3DJH 31 5000750 Rev 1 Figure 54 NS22H24M NS22H36M Charging Label...
Page 104: ...3DJH 31 5000750 Rev 1 Figure 55 NS22H48M NS22H60M Charging Label...
Page 105: ...3DJH 31 5000750 Rev 1 Notes...
