Burnham V9A User Manual
Page 41
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41
Figure 36: Minimum Piping Requirements for V9A Tankless Heater Manifolds
Figure 37a: Schematic Tankless Heater Piping
Notes:
1. Ratings are given in gallons per minute continuous
flow of water heated from 40°F to 140°F with 200°F
boiler water.
2. For tankless heater quantities less than maximum
allowable, it is important that water heaters be
centrally located in the boiler.
See Figure 8 for appropriate locations.
3. Tankless heater pressure drop is 5.5 PSI at
7.5 GPM.
Boiler
Model
Number of V9-2 Tankless Heaters Installed
1
2
3
4
V903A
6.75
---
---
---
V904A
7.5
---
---
--
V905A
7.5
---
---
---
V905A
7.5
---
---
---
V906A
7.5
15
---
---
V908A
7.5
15
---
---
V909A
7.5
15
22.5
---
V910A
7.5
15
22.5
---
V911A
7.5
15
22.5
---
V912A
7.5
15
22.5
30
Table IV: Tankless Heater Ratings
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