T-K3 Service Manual
Ver. 1.05
54
CONFIDENTIAL
12-11. Pump control ON/OFF conditions: BTU requirements for Continuous mode
(Non-stop pump operation)
A. Calculating the pump’s ON/OFF condition
【
Condition needed to turn the pump ON
】
( T
set
– Tin ) × GPM × 500 > 11,900
【
There are no conditions w hich turn the pump OFF
】
Non-stop pump operation
Once the computer sends an ON signal to the pump, it w ill never send a STOP signal. The
pump w ill continually run non-stop as long as there is pow er to the T-K3.
B. Calculation example
Set temperature : T
set
= 122
˚
F
Flow rate = 2.5 GPM
【
Condition needed to turn the pump ON
】
( 122 – T
in
) × 2.5 × 500 > 11,900 T
in
< 112.5
˚
F
C. ON table
Flow rate of pump (GPM)
Set temperature
(
˚
F)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
113
89.2
97.1
101.1
103.5
105.1
106.2
107.1
122
98.2
106.1
110.1
112.5
114.1
115.2
116.1
131
107.2
115.1
119.1
121.5
123.1
124.2
125.1
140
116.2
124.1
128.1
130.5
132.1
133.2
134.1
158
134.2
142.1
146.1
148.5
150.1
151.2
152.1
167
143.2
151.1
155.1
157.5
159.1
160.2
161.1
185
161.2
169.1
173.1
175.5
177.1
178.2
179.1
