16
CONNECT THE BLUE WIRE TO:
FAN MOTOR
MEDIUM FACTORY SETTING
H FOR HIGH SPEED FAN
M FOR MEDIUM SPEED FAN
L FOR LOW SPEED FAN
H
M
L
BLU
3.8.4 - PSC (permanent split capacitor) blower speed
selection
All water-source heat pumps are factory-set to deliver rated air
flow at nominal static (37 Pa) on medium speed. Where higher
static is needed, high speed can be utilised (100 to 125 Pa). Low
speed will deliver approximately 85% of rated air flow (25 Pa).
The PSC blower fan speed can be changed on all units by
swapping wires connected to the relay contacts that control the
fan (see Table 4 and Fig. 14).
NOTE: Available air flow for all units is shown in Table 4.
Fig. 14 - 50RHE blower speed selection
Table 4 - Fan performance
50RHE blower performance
50RHE
Nominal
Minimum
Fan
Air flow, l/s
air flow
air flow
speed
External static pressure, Pa
l/s
l/s
0
25
50
75
100
125
006
81
61
High
133
123
112
89
78
-
Medium
110
99
87
68
-
-
Low
98
90
75
60
-
-
009
113
85
High
165
151
142
118
99
-
Medium
160
146
127
113
94
-
Low
151
137
123
109
90
-
012
140
104
High
170
165
151
137
123
109
Medium
165
151
142
127
118
-
Low
146
137
127
118
104
-
015
212
160
High
345
316
288
250
198
-
Medium
321
302
274
241
189
-
Low
293
278
255
222
179
-
019
264
198
High
326
311
283
250
203
-
Medium
302
288
260
227
189
-
Low
293
269
245
217
179
-
024
307
231
High
396
368
335
302
260
-
Medium
387
359
326
297
255
-
Low
368
340
311
278
231
-
030
349
264
High
529
496
463
425
378
330
Medium
510
477
448
415
368
326
Low
458
439
406
378
340
297
036
437
326
High
614
576
579
463
415
373
Medium
580
543
488
434
392
349
Low
505
472
429
387
349
-
042
530
396
High
743
691
629
566
501
435
Medium
637
593
539
485
429
-
Low
498
463
421
-
-
-
048
630
472
High
793
738
672
604
535
464
Medium
777
723
658
592
524
455
Low
762
709
645
580
514
446
High static
048
630
472
High
-
-
-
757
668
552
Medium
-
-
787
710
623
529
Low
-
797
748
690
612
516
060
790
595
High
896
866
833
796
755
710
Medium
818
803
779
747
707
658
Low
748
731
709
683
653
618
Legend
Shaded areas are below minimum air flow. This data is provided for troubleshooting information only.
Notes:
1.
Units factory-shipped on medium speed. Other speeds require field selection.
2.
For dual voltage units, air flow is rated at lowest voltage.
3.
Performance data shown is based on wet coil and clean air filter.
Connect the blue wire to:
H for high speed fan
M for medium speed fan
L for low speed fan
Fan motor
Medium factory setting
Blue