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27
AIR COIL — To obtain maximum performance, clean the air
coil before starting the unit. A ten percent solution of dish-
washer detergent and water is recommended for both sides of
the coil. Rinse thoroughly with water.
PSC (Permanent Split Capacitor) Blower
Speed Selection —
All water source heat pumps are
factory set to deliver rated airflow at nominal static (0.15 in.
wg) on medium speed. Where higher static is needed, high
speed can be utilized (0.4 to 0.5 in. wg). Low speed will
deliver approximately 85% of rated airflow (0.10 in. wg). The
PSC blower fan speed can be changed on all units by swapping
wires connected to the relay contacts that control the fan. See
Fig. 27.
FOR 50RHR,RVR,RHS,RVS AND RDS UNITS — On the
control, the black wire is connected to High, blue wire is
connected to Medium and red wire is connected to Low. See
Fig. 19-22.
NOTE: Available airflows for all units are shown in Tables 8-13.
FOR 50RHC,RVC UNITS — The PSC blower fan speed
can be changed by moving the blue wire on the fan motor ter-
minal block to the desired speed as shown in Fig. 27. The
50RHC,RVC units are designed to deliver rated airflow at
nominal static (0.15 in. wg) on medium speed (factory setting)
and rated airflow at a higher static (0.4 to 0.5 in. wg) on high
speed for applications where higher static is required. Low
speed will deliver approximately 85% of rated airflow at
0.10 in. wg. An optional ‘High Static’ blower is available by
using the special option code in the model nomenclature.
Table 8 — 50RHR,RVR Blower Performance
LEGEND
*Size 006 available in 50RHR units only.
NOTES:
1. Units factory shipped on medium speed. Other speeds require
field selection.
2. All airflow is rated on 208 v operating with wet coil and clean air
filter.
3. All units ARI/ISO/ASHRAE 13256-1 rated on high fan speed.
4. Only two-speed fan (H & M) available on 575-v units.
50RHR,RVR
UNITS
RATED
CFM
MIN
CFM
FAN
SPEED
AIRFLOW (Cfm)
External Static Pressure (in. wg)
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90
006* 200 150
HI 300 290 280 270 260 250 240 230 210 190 160 110
MED 240 230 220 210 200 190 180 160 140 130 110
LO 220 210 200 200 190 180 160 150 130 130
009 300 225
HI 450 440 430 420 400 390 370 350 320 310 300 230
MED 410 400 390 380 360 350 340 330 310 290 270
LO 370 360 350 340 320 320 310 300 280 260 240
012 375 300
HI 470 460 450 440 430 420 400 390 380 370 350 330 290
MED 410 400 380 370 360 360 350 340 330 320 310 290
LO 340 330 320 320 310 310 300 300 290 290
015 500 375
HI 750 730 710 700 680 660 630 600 570 540 500 400
MED 660 640 620 610 590 570 550 530 500 470 440 370
LO 580 570 550 540 520 500 480 460 430 400 370
019 600 450
HI 850 820 790 770 740 710 670 640 600 560 520 450
MED 700 680 660 640 620 590 560 530 500 470 440
LO 600 580 560 540 510 490 460 460
024 800 600
HI 980 950 920 890 860 830 790 760 720 680 640 540
MED 850 830 800 770 740 720 690 660 620 580 540 460
LO 700 680 660 650 630 610 590 560 530 500 470
030 1000 750
HI 1330 1300 1260 1230 1190 1150 1100 1050 1000 960 920 830
MED 1210 1190 1160 1130 1100 1050 1000 970 930 880 830 720
LO 1050 1030 1010 980 950 920 890 850 810 770 730
036 1200 900
HI 1580 1540 1500 1470 1440 1410 1370 1330 1280 1240 1200 1090 940
MED 1400 1370 1340 1310 1280 1250 1220 1190 1150 1100 1050 920
LO 1100 1080 1060 1040 1010 980 950 920 890 890
042 1400 1050
HI 1790 1760 1730 1700 1660 1630 1590 1550 1510 1480 1440 1370 1270 1120
MED 1500 1490 1470 1450 1420 1400 1380 1350 1320 1300 1270 1180 1070
LO 1110 1100 1090 1080 1060 1050 1040
048 1600 1200
HI 1910 1880 1840 1800 1750 1730 1700 1650 1600 1540 1480 1380 1300
1180
MED 1830 1790 1740 1700 1660 1620 1570 1540 1500 1450 1400 1320 1210 1120
LO 1700 1670 1640 1600 1560 1530 1490 1460 1430 1390 1340 1250 1170
High Static
048
1600 1200
HI 2180 2140 2090 2060 2030 1990 1940 1870 1800 1750 1690 1580 1440 1270
990
MED 2080 2050 2020 1970 1920 1870 1820 1740 1650 1640 1620 1530 1320 1220
910
LO 1990 1950 1910 1880 1840 1810 1770 1710 1650 1620 1580 1460 1340
1180
060 2000 1500
HI 2230 2220 2200 2160 2120 2090 2060 2040 2010 1990 1960 1880 1790 1660
MED 2040 2020 1990 1970 1940 1920 1890 1860 1830 1810 1780 1710 1620
LO 1840 1830 1810 1800 1780 1760 1730 1700 1670 1640 1600 1510
Shaded areas are below minimum CFM. This data is
provided for troubleshooting information only.
CFM — Cubic Feet Per Minute
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
Fig. 27 — 50RHC,RVC Blower Speed Selection