20
For 48/50PG03-- 07 units, one outdoor fan is controlled in all
modes by the MotormasterR sensing on circuit A.
For 48/50PG08-- 14 units, 2 outdoor fans are controlled in all
modes by the Motormaster sensing on circuit A.
For 48/50PG16 units, 3 outdoor fans are controlled in normal
cooling and sub--cooling Reheat1 modes by the Motormaster
sensing circuit A. Two of the fans are additionally controlled with
OFC.1 output, based on outdoor temperature, during the hot-- gas
Reheat2 mode (level 1 = 1 fan, level 2 = 3 fans).
For 48/50PG20--28 and 48/50PM16--28 units, contactor OFC1
controls power to the Motormaster which controls OFM1 and
OFM4. Contactor OFC2 controls the remaining two fans (16 and
20 size) or remaining 4 fans (24 and 28 sizes).
Table 5 – Outdoor Fan Level Transitions
FAN LEVEL
OUTDOOR TEMPERATURE (F)
W i t h o u t H u m i d i --- M i Z e r ™ S y s t e m With Humidi --- MiZer System
Level 2 On 55 (sizes 03---20), 45 (sizes 24--- 28) 61 (PG03 ---16, sizes 24--- 28), 68 (size 20, PM16)
Level 2 Off 45 (PG03--- 16), 50 (size 20, PM16), 40 (sizes 24--- 28) 57
Level 3 On 65 68 (PG03---16, size 24--- 28), 88 (size 20, PM16)
Level 3 Off 55 62 (PG03--- 16, size 24--- 28), 78 (size 20, PM16)
NOTE: Where not specified, the models are both PG and PM. Levels 0 and 1 are only in play if the OAT is lower than the Level 2 On temperature and the
pressure is not above its respected max.
Table 6 – 48/50PG03-- 16 Fan Level Control of Fans and Contactors
FAN LEVEL
48/50PG03---07 48/50PG08---14 48/50PG16
Standard Unit H u m i d i --- M i Z e r U n i t Standard Unit H u m i d i --- M i Z e r U n i t Standard Unit H u m i d i --- M i z e r U n i t
0 OFF OFF OFF OFF OFF OFF
1
OFC1 On
Low Speed
Motormaster
Fan 1
OFC1 On,
OFC2 Off
Fan 1 On
Motormaster
Fan 1 and Fan 2
OFC1 On,
OFC2 Off
Fan 1 On
Motormaster, OFC1
Off
Fan 2
2
OFC1 Off
High Speed
N/A
OFC1 On,
OFC2 On
Fan 1 and 2 On
N/A
OFC1 On,
OFC2 On
Fan1,2,3On
Motormaster, OFC1
On
Fan1,2,3
3 N/A N/A N/A N/A N/A N/A
Table 7 – 48/50PG20-- 28 a nd PM16 --28 Fan Level Control of Outdoor Fan contactors (OFC(X))
With Humidi --- MiZer System With Humidi---MiZer System
Circuit A Circuit B Circuit A and B
--- --- ---
1
1, 3 (PG28)
3 1
1,2 (20, PM16)
2 (24--- 28)
2, 3 (20, PM16)
2 (24--- 28)
1, 2 (20, PM16)
2 (24--- 28)
1,2
1, 2, 3 (PG28)
2, 3 1, 2
48/50PG and PM
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