Performance
Data
UNT-PRC001-EN
25
Hot Water
Reheat Coils
The following performance data represents the 1-row hot water and steam reheat coils
that are available on fan-coil units in conjunction with a 2, 3 or 4-row cooling coil.
Heating performance is based on 70 F (21 C) entering air temperature, 180 F (82 C)
entering hot water temperature with a 20 F (-7 C) DT.
All performance measured on high speed tap, 115 V, zero ESP, with a throwaway filter.
See page 18 for performance groupings.
Table PD-14. Hot Water Reheat Coil With Free Discharge Motor, Group 1
Main
Coil
TMBH
GPM
WPD
FC
Rows
(TkW)
Q/ITD
(L/s)
(Pa)
2
2.9 (.8)
0.03
0.3 (.02)
0.01 (30)
02
3
2.8 (.8)
0.03
0.3 (.02)
0.01 (30)
4
2.7 (.8)
0.02
0.3 (.02)
0.01 (30)
2
4.1 (1.2)
0.04
0.4 (.03)
0.02 (60)
03
3
4.0 (1.2)
0.04
0.4 (.03)
0.02 (60)
4
3.8 (1.1)
0.04
0.4 (.03)
0.02 (60)
2
5.6 (1.6)
0.05
0.6 (.04)
0.04 (120)
04
3
5.6 (1.6)
0.05
0.6 (.04)
0.04 (120)
4
5.3 (1.6)
0.05
0.5 (.03)
0.03 (90)
2
9.3 (2.7)
0.09
0.9 (.06)
0.10 (299)
06
3
9.3 (2.7)
0.09
0.9 (.06)
0.10 (299)
4
8.9 (2.6)
0.08
0.9 (.06)
0.09 (269)
2
12.5 (3.7)
0.11
1.2 (.08)
0.18 (538)
08
3
11.9 (3.5)
0.11
1.2 (.08)
0.17 (508)
4
11.4 (3.3)
0.10
1.1 (.07)
0.16 (478)
2
16.1 (4.7)
0.15
1.6 (.10)
0.32 (957)
10
3
16.2 (4.7)
0.15
1.6 (.10)
0.32 (957)
4
15.6 (4.6)
0.14
1.6 (.10)
0.30 (897)
2
18.8 (5.5)
0.17
1.9 (.12)
0.45 (1350)
12
3
18.5 (5.4)
0.17
1.8 (.11)
0.44 (1320)
4
17.8 (5.2)
0.16
1.8 (.11)
0.40 (1200)
Table PD-15. Hot Water Reheat Coil With Free Discharge Motor, Group 2
Main
Coil
TMBH
GPM
WPD
FC
Rows
(TkW)
Q/ITD
(L/s)
(Pa)
2
2.7 (.8)
0.03
0.3 (.02)
0.01 (30)
02
3
2.6 (.8)
0.02
0.3 (.02)
0.01 (30)
4
2.5 (.7)
0.02
0.3 (.02)
0.01 (30)
2
3.8 (1.1)
0.03
0.4 (.03)
0.02 (60)
03
3
3.7 (1.1)
0.03
0.4 (.03)
0.02 (60)
4
3.6 (1.1)
0.03
0.4 (.03)
0.02 (60)
2
5.3 (1.6)
0.05
0.5 (.03)
0.03 (90)
04
3
5.2 (1.5)
0.05
0.5 (.03)
0.03 (90)
4
5.0 (1.5)
0.05
0.5 (.03)
0.03 (90)
2
8.8 (2.6)
0.08
0.9 (.06)
0.09 (269)
06
3
8.7 (2.5)
0.08
0.9 (.06)
0.09 (269)
4
8.5 (2.5)
0.08
0.8 (.05)
0.08 (239)
2
11.7 (3.4)
0.11
1.2 (.08)
0.17 (508)
08
3
11.2 (3.3)
0.10
1.1 (.07)
0.15 (448)
4
10.9 (3.2)
0.10
1.1 (.07)
0.15 (448)
2
15.2 (4.5)
0.14
1.5 (.09)
0.29 (867)
10
3
15.2 (4.5)
0.14
1.5 (.09)
0.29 (867)
4
14.8 (4.3)
0.13
1.5 (.09)
0.27 (807)
2
17.7 (5.2)
0.16
1.8 (.11)
0.40 (1200)
12
3
17.4 (5.1)
0.16
1.7 (.11)
0.39 (1170)
4
16.9 (5.0)
0.15
1.7 (.11)
0.37 (1110)
Note:
1. Medium and low speed capacities are approximately
80 percent and 60 percent respectively of the high speed capacity.
2. Q/ITD = MBH (kW)/(Entering water temperature - Entering air temperature) when
∆
T and GPM (L/s) remain constant. To
determine heating capacities at a different entering water temperature or entering air temperature, compute the new ITD and
multiply it by the Q/ITD shown.
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