Carrier 48/50PG Series Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 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).
FAN LEVEL
Level 2 On
Level 2 Off 45 (PG03--- 16), 50 (size 20, PM16), 40 (sizes 24--- 28)
Level 3 On
Level 3 Off
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.
48/50PG03---07
FAN LEVEL
Standard Unit
0 OFF
OFC1 On
1
Low Speed
OFC1 Off
2
High Speed
3 N/A
Table 7 – 48/50PG20- -28 and PM16- -28 Fan Level Control of Outdoor Fan contactors (OFC(X))
Circuit A
---
1
1, 3 (PG28)
1,2 (20, PM16)
2 (24--- 28)
1,2
1, 2, 3 (PG28)
Table 5 – Outdoor Fan Level Transitions
Without Humidi---MiZer™ System
55 (sizes 03--- 20), 45 (sizes 24--- 28)
65
55
Table 6 – 48/50PG03- -16 Fan Level Control of Fans and Contactors
Humidi---MiZer Unit Standard Unit
OFF OFF
OFC1 On,
Motormaster
OFC2 Off
Fan 1
Fan 1 On
OFC1 On,
N/A OFC2 On
Fan 1 and 2 On
N/A N/A
With Humidi---MiZer System
2, 3 (20, PM16)
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).
OUTDOOR TEMPERATURE (F)
61 (PG03--- 16, sizes 24--- 28), 68 (size 20, PM16)
68 (PG03--- 16, size 24--- 28), 88 (size 20, PM16)
62 (PG03--- 16, size 24--- 28), 78 (size 20, PM16)
48/50PG08---14
Humidi---MiZer Unit
OFF
Motormaster
Fan 1 and Fan 2
N/A
N/A
Circuit B
---
3
2 (24--- 28)
2, 3
20
With Humidi---MiZer System
57
48/50PG16
Standard Unit Humidi---Mizer Unit
OFF OFF
OFC1 On, Motormaster, OFC1
OFC2 Off Off
Fan 1 On Fan 2
OFC1 On, Motormaster, OFC1
OFC2 On On
Fan 1, 2, 3 On Fan 1, 2, 3
N/A N/A
With Humidi---MiZer System
Circuit A and B
---
1
1, 2 (20, PM16)
2 (24--- 28)
1, 2