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12-7.(B) ON/OFF conditions: BTU requirements
alculating the ON/OFF conditions of the T-M32
A. C
【Condition needed to turn the T-M32 ON】
(T
– T
) × GPM × 500 > 14,880
set
in
【Condition needed to turn the T-M32 OFF】
(T
– T
) × GPM × 500 <11,900 or T
set
in
Where: T
set
B. Calculation example
Set temperature: T
set
【Condition needed to turn the T-M32 ON】
(120 – T
) × 2.5 × 500 > 14,880
in
【Condition needed to turn the T-M32 OFF】
(120 - T
) × 2.5 × 500 < 11,900
in
C. ON/OFF table
Set temperature
(˚F)
ON
100
OFF
ON
115
OFF
ON
120
OFF
ON
135
OFF
ON
145
OFF
ON
155
OFF
ON
165
OFF
ON
185
OFF
= T
in
set
= Set temperature and T
= 120˚F
Flow rate = 2.5 GPM
T
< 108.1˚F
in
T
in
The outlet temperature at that moment will be 120˚F
0.5
1.0
40.5
70.2
52.4
76.2
55.5
85.2
67.4
91.2
60.5
90.2
100.2
72.4
96.2
104.1
75.5
105.2
115.2
87.4
111.2
119.1
85.5
115.2
125.2
97.4
121.2
129.1
95.5
125.2
135.2
107.4
131.2
139.1
105.5
135.2
145.2
117.4
141.2
149.1
125.5
155.2
165.2
137.4
161.2
169.1
T-M32 / T-M32 ASME Service Manual
= Inlet temperature
in
> 110.5˚F
Flow rate (GPM)
1.5
2.0
80.2
85.1
84.1
88.1
95.2
100.1
99.1
103.1
105.1
108.1
120.1
123.1
130.1
133.1
140.1
143.1
150.1
153.1
170.1
173.1
57
CONFIDENTIAL
2.5
3.0
88.1
90.1
90.5
92.1
103.1
105.1
105.5
107.1
108.1
110.1
110.5
112.1
123.1
125.1
125.5
127.1
133.1
135.1
135.5
137.1
143.1
145.1
145.5
147.1
153.1
155.1
155.5
157.1
173.1
175.1
175.5
177.1
Ver. 1.03
3.5
4.0
91.5
92.6
93.2
94.1
106.5
107.6
108.2
109.1
111.5
112.6
113.2
114.1
126.5
127.6
128.2
129.1
136.5
137.6
138.2
139.1
146.5
147.6
148.2
149.1
156.5
157.6
158.2
159.1
176.5
177.6
178.2
179.1
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