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Heat
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Circulators
The circulators moves the heated fl uid through the hydronic system when there is a call for heat from the thermostat. Primary
pump on the TWH070XP is a UPS26-99BFC.
Specifi cations:
• The following pump curves apply.
8
®
20
18
16
14
12
10
8
6
4
2
0
0
35
30
25
20
15
10
5
0
0
Installation, Operation, and Maintenance
TWH – Tankless Water Heater Panels
UPS15-58CIL2 Pump Curve
2
4
6
8
Flow (gpm)
1st Speed
2nd Speed
UPS26-99BFC Pump Curve
5
10
15
Flow (gpm)
1st Speed
2nd Speed
10
12
14
3rd Speed
20
25
30
3rd Speed
16
35
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Troubleshooting
