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Table 22 — 50RHR,RVR Coaxial
Water Pressure Drop
*Size 006 available in 50RHR unit only.
Table 23 — 50RHS,RVS,RDS Coaxial
Water Pressure Drop
Table 24 — 50RHC,RVC Coaxial
Water Pressure Drop
*Size 006 available in 50RHC unit only.
†Size 041 available in 50RVC unit only.
Antifreeze — In areas where entering loop temperatures
drop below 40 F or where piping will be routed through areas
subject to freezing, antifreeze is needed.
Alcohols and glycols are commonly used as antifreeze
agents. Freeze protection should be maintained to 15 F below
the lowest expected entering loop temperature. For example, if
the lowest expected entering loop temperature is 30 F, the leav-
ing loop temperature would be 22 to 25 F. Therefore, the freeze
protection should be at 15 F (30 F – 15 F = 15 F).
Calculate the total volume of fluid in the piping system. See
Table 25. Use the percentage by volume in Table 26 to deter-
mine the amount of antifreeze to use. Antifreeze concentration
should be checked from a well mixed sample using a hydrome-
ter to measure specific gravity.
FREEZE PROTECTION SELECTION — The 30 F FP1
factory setting (water) should be used to avoid freeze damage
to the unit.
Once antifreeze is selected, the JW3 jumper (FP1) should
be clipped on the control to select the low temperature (anti-
freeze 13 F) set point to avoid nuisance faults.
UNIT
50RHR,RVR
GPM
WATER TEMPERATURE (F)
30 F 50 F 70 F 90 F
Pressure Drop (psi)
006*
0.8 0.8 0.8 0.7 0.7
1.1 1.2 1.1 1.0 1.0
1.5 2.0 1.9 1.8 1.7
009
1.1 1.2 1.1 1.0 0.9
1.7 1.7 1.6 1.5 1.4
2.2 3.5 3.2 3.0 2.8
012
1.5 2.8 2.6 2.4 2.3
2.3 6.0 5.6 5.2 4.9
3.0 9.6 9.0 8.3 7.9
015
1.8 2.5 2.3 2.1 2.0
2.6 4.8 4.5 4.1 3.9
3.5 8.1 7.6 7.0 6.6
019
2.3 1.9 1.7 1.6 1.5
3.4 3.4 3.1 2.9 2.7
4.5 6.6 6.2 5.7 5.4
024
3.0 2.0 1.9 1.7 1.6
4.5 4.2 3.9 3.6 3.4
6.0 7.0 6.5 6.0 5.7
030
3.8 1.4 1.3 1.2 1.2
5.5 2.4 2.3 2.1 2.0
7.5 3.9 3.7 3.4 3.2
036
4.5 1.1 1.1 1.0 0.9
6.8 2.1 2.0 1.9 1.8
9.0 3.5 3.3 3.0 2.9
042
5.3 1.4 1.3 1.2 1.2
7.9 2.9 2.7 2.5 2.3
10.5 4.6 4.2 3.9 3.7
048
6.0 2.1 1.9 1.8 1.7
9.0 3.9 3.7 3.4 3.2
12.0 6.4 5.9 5.5 5.2
060
7.5 2.9 2.7 2.5 2.4
11.3 5.7 5.3 4.9 4.7
15.0 9.4 8.7 8.1 7.7
UNIT
50RHS,RVS,RDS
GPM
WATER TEMPERATURE (F)
30 F 50 F 70 F 90 F
Pressure Drop (psi)
015
1.8 0.6 0.5 0.5 0.5
2.8 1.0 0.9 0.8 0.8
3.8 1.5 1.4 1.3 1.2
018
2.2 0.7 0.7 0.6 0.6
3.5 1.3 1.2 1.1 1.1
4.5 1.8 1.8 1.6 1.5
024
3.0 0.6 0.6 0.5 0.5
4.5 1.1 1.1 1.0 0.9
6.0 1.8 1.7 1.5 1.5
030
3.7 0.8 0.8 0.7 0.7
5.5 1.6 1.4 1.3 1.3
7.5 2.6 2.4 2.2 2.1
036
4.5 1.3 1.2 1.1 1.1
7.0 2.1 1.9 1.8 1.7
9.0 3.9 3.7 3.4 3.2
042
5.2 1.6 1.5 1.4 1.3
8.0 3.2 3.0 2.8 2.6
10.5 5.1 4.7 4.4 4.1
048
6.0 2.1 1.9 1.8 1.7
9.0 3.9 3.7 3.4 3.2
12.0 6.4 5.9 5.5 5.2
060
7.5 1.1 1.0 1.0 0.9
11.3 2.2 2.1 1.9 1.8
15.0 3.6 3.4 3.1 3.0
070
9.0 1.5 1.4 1.3 1.2
13.5 3.0 2.8 2.6 2.5
18.0 5.0 4.7 4.3 4.1
UNIT
50RHC,RVC
GPM
WATER TEMPERATURE (F)
60 F70 F80 F90 F
Pressure Drop (psi)
006*
0.9 0.7 0.7 0.7 0.6
1.1 1.2 1.2 1.2 1.1
1.7 1.9 1.9 1.8 1.8
2.0 2.9 2.8 2.7 2.6
009
1.1 2.4 2.3 2.3 2.2
1.7 3.1 3.0 2.9 2.8
2.3 4.0 3.9 3.8 3.7
3.0 5.4 5.3 5.1 4.9
012
1.5 2.3 2.2 2.1 2.1
2.3 4.4 4.3 4.2 4.0
3.0 6.4 6.2 6.0 5.8
4.013.312.912.612.2
018
2.3 2.0 2.0 1.9 1.8
3.5 3.1 3.0 2.9 2.8
4.5 4.2 4.1 3.9 3.8
6.0 5.9 5.7 5.6 5.4
024
3.0 2.0 1.9 1.8 1.8
4.5 3.9 3.7 3.6 3.5
6.0 6.4 6.2 6.0 5.8
8.0 10.6 10.3 10.0 9.7
030
3.8 1.5 1.5 1.4 1.4
5.5 2.7 2.6 2.5 2.4
7.5 4.3 4.2 4.1 3.9
10.0 6.9 6.7 6.5 6.3
036
4.5 1.7 1.7 1.6 1.6
6.8 3.2 3.1 3.0 2.9
9.0 5.0 4.9 4.8 4.6
12.0 8.2 7.9 7.7 7.5
041†
5.3 0.9 0.9 0.9 0.9
7.9 2.2 2.1 2.1 2.0
10.5 4.0 3.9 3.8 3.6
13.0 6.2 6.0 5.8 5.7
042
5.3 1.0 1.0 1.0 0.9
8.0 2.6 2.6 2.5 2.4
11.0 5.3 5.1 4.9 4.8
14.0 8.7 8.5 8.2 8.0
048
6.0 1.2 1.2 1.2 1.1
9.0 2.9 2.8 2.7 2.6
12.0 5.3 5.1 4.9 4.8
16.0 9.5 9.2 8.9 8.6
060
7.5 4.4 4.2 4.1 4.0
11.3 7.6 7.3 7.1 6.9
15.0 11.4 11.1 10.8 10.4
20.0 17.6 17.1 16.6 16.1
IMPORTANT: All alcohols should be pre-mixed and
pumped from a reservoir outside of the building or
introduced under water level to prevent fuming.