Appendix
I
F-1
Pressure Switch Settings
All 250° F {121° C} maximum set point temperature units require 25 psig to operate.
For 250° F {121° C} maximum set point temperature and 48 kW heater units the unit with
36 kW of heat will operate at 25 psig, the last 12 kW of heat will not operate without at
least 35 psig in the suction side tank.
For 300° F {149° C} units please refer to the tables below.
Direct Injection Units at 300 °F {149° C}
Minimum System Pressure Required for System Operation (in psig) for 60 Hz Input Power
(Digit 7 of Part # is B,C, F, A or D)
Heater Capacity
(Digit 7 of Part #)
Pump Power (Digit 6 of Part #)
¾ hp
1 hp
2 hp
3 hp 5 hp
7½ hp 10 hp
Description
Description
Digit 7 Value
D
E
H
J
K
L
M
Digit 6 Value
0 kW
0
60
60
60
60
60
60
60
3 kW
A
65
65
65
60
60
60
60
6 kW
B
65
65
65
60
60
60
60
9 kW
C
65
65
65
60
60
60
60
12 kW
D
65
65
65
60
60
60
60
18 kW
E
65
65
65
60
60
60
60
24 kW
F
60
60
60
60
60
60
60
36 kW
G
N/A
75
75
75
60
60
60
48 kW*
H
N/A
75
75
75
60
60
60
* For 300°F {149° C}, 48 kW, Direct Injection units the minimum pressure in the suction tank for the 12 kW heater
to operate is 80 psig
Minimum System Pressure Required for System Operation (in psig) for 50 Hz Input Power
(Digit 7 of Part # is E)
Heater Capacity
(Digit 7 of Part #)
Pump Power (Digit 6 of Part #)
½ hp
¾ hp
1 hp
2 hp 3 hp
5 hp
7½ hp
Description
Description
Digit 7 Value
C
D
E
H
J
K
L
Digit 6 Value
0 kW
0
60
60
60
60
60
60
60
3 kW
A
N/A
70
70
70
60
60
60
6 kW
B
N/A
70
70
70
60
60
60
9 kW
C
N/A
70
70
70
60
60
60
12 kW
D
N/A
70
70
70
60
60
60
18 kW
E
N/A
70
70
70
60
60
60
24 kW
F
N/A
70
70
70
70
60
60
36 kW
G
N/A
N/A
N/A
N/A
75
60
60
48 kW*
H
N/A
N/A
N/A
N/A
N/A
N/A
N/A
(continued)
Summary of Contents for Thermolator TW-P
Page 6: ...iv I Table of Contents ...
Page 12: ...1 6 I Introduction ...
Page 36: ...3 14 I ...
Page 58: ...4 22 I Operation ...
Page 72: ...5 14 I Maintenance ...
Page 128: ...E 4 I Appendix ...
Page 134: ...G 4 I Appendix ...
Page 136: ...H 2 I Appendix ...