Zehnder Rittling H4C, Installation, Operation And Maintenance Manual

Page: 5 / 36

Primary Air Nozzle Arrangement
Cfm
F

T (Btuh)
Capacity
20°
F G H J K
Unit Size
24" 32" 40" 52" 24" 32" 40" 52" 24" 32" 40" 52" 24" 32" 40" 52" 24" 32" 40" 52"
15 324
1383
(0.89)
20 432
1820
(1.59)
1872
(0.94)
1888
(0.81)
25 540
2251
(2.48)
2316
(1.47)
2358
(0.97)
2199
(1.26)
2402
(0.74)
30 648
2678
(3.57)
2756
(2.11)
2806
(1.39)
2490
(1.82)
2720
(1.07)
2904
(0.71)
2375
(0.89)
35 756
3192
(2.88)
3250
(1.90)
3233
(1.10)
2766
(2.48)
3022
(1.46)
3227
(0.97)
2612
(1.21)
2884
(0.71)
40 864
3625
(3.76)
3691
(2.48)
3672
(1.44)
3030
(3.24)
3310
(1.91)
3534
(1.26)
3746
(0.73)
2837
(1.58)
3131
(0.94)
2646
(0.92)
45 972
4129
(3.14)
4108
(1.82)
3587
(2.42)
3830
(1.60)
4060
(0.93)
3050
(2.01)
3367
(1.19)
3627
(0.78)
2823
(1.17)
3200
(0.72)
50 1080
4565
(3.88)
4542
(2.25)
3854
(2.99)
4116
(1.97)
4362
(1.14)
3255
(2.48)
3594
(1.46)
3870
(0.96)
4151
(0.56)
2991
(1.45)
3391
(0.89)
2852
(0.95)
55 1188
4974
(2.72)
4113
(3.62)
4392
(2.39)
4655
(1.39)
3453
(3.57)
3811
(1.77)
4105
(1.17)
4403
(0.68)
3152
(1.75)
3573
(1.07)
3860
(0.68)
2995
(1.15)
60 1296
5403
(3.24)
4661
(2.85)
4940
(1.65)
3643
(3.57)
4022
(2.11)
4331
(1.39)
4645
(0.81)
3307
(2.09)
3748
(1.28)
4049
(0.81)
3131
(1.36)
3545
(0.81)
65 1405
5832
(3.80)
4923
(3.34)
5217
(1.94)
4225
(2.48)
4550
(1.63)
4881
(0.95)
3455
(2.45)
3917
(1.50)
4231
(0.95)
3263
(1.60)
3693
(0.95)
70 1512
5178
(3.88)
5488
(2.25)
4423
(2.87)
4763
(1.90)
5109
(1.10)
3599
(2.84)
4079
(1.74)
4407
(1.11)
3389
(1.86)
3836
(1.10)
4215
(0.72)
75 1620
5753
(2.58)
4615
(3.30)
4971
(2.18)
5331
(1.26)
3738
(3.26)
4237
(2.00)
4578
(1.27)
5027
(0.75)
3511
(2.13)
3974
(1.26)
4366
(0.83)
80 1730
6012
(2.94)
4803
(3.76)
5173
(2.48)
5548
(1.44)
3873
(3.71)
4390
(2.27)
4743
(1.45)
5209
(0.86)
3629
(2.43)
4108
(1.44)
4513
(0.95)
85 1838
6265
(3.32)
5370
(2.80)
5759
(1.62)
4539
(2.57)
4904
(1.63)
5385
(0.87)
3743
(2.74)
4238
(1.62)
4656
(1.07)
90 1942
6515
(3.72)
5563
(3.14)
5966
(1.82)
4684
(2.88)
5060
(1.83)
5557
(1.09)
3855
(3.08)
4364
(1.82)
4794
(1.20)
5279
(0.69)
95 2055
5751
(3.50)
6168
(2.03)
4825
(3.21)
5213
(2.04)
5725
(1.21)
3963
(3.43)
4486
(2.03)
4929
(1.34)
5427
(0.77)
100 2160
5936
(3.87)
6367
(2.25)
4963
(3.56)
5362
(2.26)
5888
(1.34)
4069
(3.80)
4606
(2.25)
5060
(1.48)
5572
(0.86)
105 2265
6561
(2.48)
5098
(3.92)
5508
(2.50)
6048
(1.48)
4722
(2.48)
5188
(1.63)
5713
(0.95)
110 2375
6752
(2.72)
5650
(2.74)
6205
(1.63)
4836
(2.72)
5313
(1.79)
5851
(1.04)
115 2482
6940
(2.97)
5790
(2.99)
6359
(1.78)
4948
(2.97)
5436
(1.96)
5986
(1.14)
120 2590
7125
(3.24)
5927
(3.26)
6509
(1.94)
5057
(3.24)
5556
(2.13)
6118
(1.24)
125 2700
7307
(3.51)
6061
(3.54)
6657
(2.10)
5164
(3.51)
5673
(2.32)
6247
(1.34)
130 2810
7486
(3.80)
6194
(3.83)
6802
(2.27)
5269
(3.80)
5788
(2.51)
6374
(1.45)
135 2918
6944
(2.45)
5901
(2.70)
6498
(1.57)
140 3022
7084
(2.64)
6012
(2.91)
6620
(1.69)
145 3130
7222
(2.83)
6121
(3.12)
6741
(1.81)
150 3240
7358
(3.03)
6229
(3.34)
6859
(1.94)
155 3350
7492
(3.23)
6334
(3.56)
6975
(2.07)
160 3460
7624
(3.44)
6438
(3.80)
7089
(2.20)
165 3565
7754
(3.66)
7202
(2.34)
170 3675
7882
(3.89)
7313
(2.49)
Performance Data
H4C: Cooling coil capacities (Btuh)
Notes:
n n
Coil capacity for other than 25 °F  T use the following formula:
(trm - tew)/25 x rating at 25 °F

T.
n n
To aide in balancing the water systems, all units regardless of size
have the same pressure drop across the water coils.
n n
The values in the ( ) indicate the nozzle pressure (inches of wg).
n n
The ratings above are based on 25 °F  T, 1.50 gpm water flow rate
and 8 ft water coil pressure drop (all sizes) for a single coil.
n n
All ratings include allowance for lint screens.
n n
 T = trm - tew (trm = room temperature and tew = entering water
temperature).
n n
All ratings include reduction in capacity for double coil (4-pipe).
3 Ratings