Reznor, RHC21 4000 Installation EN May 2021 D301334 Issue 0 Page No 25 of 56
Model
RHC21
4024-05
4036-08
4050-06
4060-07
4075-09
4100-12
4125M15 4150M18
CO
2
at High Fire (Throttle) G20
%
8.80
8.70
8.80
8.80
8.80
8.60
8.60
8.60
CO G20
ppm
< 50 ppm
Throttle Turns from Closed
Top Burner
-
N/A
N/A
N/A
N/A
N/A
N/A
5.5 out
6.5 out
Throttle Turns from Closed
Bottom / Single Burner
-
4.25 out
5.75 out
6.0 out
7.5 out
7.5 out
21.5 in
6.25 out
6.5 out
CO
2
at Low Fire (Offset) G20
%
7.90
7.90
7.90
7.90
7.90
7.90
7.90
7.90
CO G20
ppm
< 50 ppm
Low Fire Offset Pressure G20
Top Burner
Pa
N/A
N/A
N/A
N/A
N/A
N/A
-5
-19
Low Fire Offset Pressure G20
Bottom / Single Burner
Pa
-7
-7
-18
-36
-38
-21
-13
-16
CO
2
at High Fire (Throttle) G25
%
8.80
8.70
8.80
8.80
8.80
8.60
8.60
8.60
CO G25
ppm
< 50 ppm
Throttle Turns from G20
Top Burner
-
N/A
N/A
N/A
N/A
N/A
N/A
1.75 out
2.5 out
Throttle Turns from G20
Single / Bottom Burner
-
1.5 out
2.25 out
1.75 out
3.5 out
2.5 out
6.5 in
3.0 out
2.5 out
CO
2
at Low Fire (Offset) G25
%
7.90
7.90
7.90
7.90
7.90
7.90
7.90
7.90
CO G25
ppm
< 50 ppm
Low Fire Offset Pressure G25
Top Burner
Pa
N/A
N/A
N/A
N/A
N/A
N/A
-5
-19
Low Fire Offset Pressure G25
Bottom / Single Burner
Pa
-7
-7
-18
-36
-38
-21
-13
-16
CO
2
at High Fire (Throttle) G25.3
%
8.80
8.70
8.80
8.80
8.80
8.60
8.60
8.60
CO G25.3
ppm
< 50 ppm
Throttle Turns from G20
Top Burner
-
N/A
N/A
N/A
N/A
N/A
N/A
1.5 out
2.25 out
Throttle Turns from G20
Single / Bottom Burner
-
1.0 out
2.0 out
1.5 out
3.0 out
2.25 out
6.0 in
2.25 out
2.25 out
CO
2
at Low Fire (Offset) G25.3
%
7.90
7.90
7.90
7.90
7.90
7.90
7.90
7.90
CO G25.3
ppm
< 50 ppm
Low Fire Offset Pressure G25.3
Top Burner
Pa
N/A
N/A
N/A
N/A
N/A
N/A
-5
-19
Low Fire Offset Pressure G25.3
Bottom / Single Burner
Pa
-7
-7
-18
-36
-38
-21
-13
-16
Flue Gas Temperature High Fire
Δ
T
°C
169
166
150
147
151
150
173
160
Flue Gas Temperature Low Fire
Δ
T
°C
35
30
29
39
29
28
31
28
Flue Pressure at Maximum Flue
Resistance
Pa
1
36.61
10
30
12
48
3
55
Mass Flow Rate Flue Gases High Fire
G20
kg/h
19.79
35.30
43.57
53.10
69.04
98.65
124.27
143.30
Mass Flow Rate Flue Gases High Fire
G25
kg/h
19.60
35.15
41.86
56.58
70.45
94.32
130.35
147.39
Mass Flow Rate Flue Gases High Fire
G25.3
kg/h
21.28
2
44.47
62.00
71.62
89.75
131.90
147.99
Thermal Efficiency High Fire NCV
%
91.57
91.31
92.41
92.61
92.24
92.14
91.00
91.74
Thermal Efficiency Low Fire NCV
%
98.17
98.32
98.43
97.94
98.40
98.42
98.32
98.49
Ignition Controller Program Key
Top Burner
Ω
N/A
N/A
N/A
N/A
N/A
N/A
15,000
33,000
Ignition Controller Program Key
Bottom Burner
Ω
1,000
2,200
3,300
4,700
6,800
10,000
22,000
33,000
Table 10 : Nominal Combustion Values with service door closed
