Service manual

12
11 PIPING OF BOILER TO SYSTEM (FIG.5)
Check all applicable local heating, plumbing and building safety codes before proceeding.
Be sure to provide unions and gate valves at inlet and outlet to boiler so that it can be easily isolated for
service.
This boiler is of a low mass design, which provides for instant heat transfer. Special attention to water
flow rates will ensure that temperature rise does not exceed 35°F (19.4°C). The following table is
provided as a guide.
For application in areas known to have hard water conditions, contact factory for recommendations.
Table 6: Flow and Pressure Drop at a Given Temperature Rise
Head Loss and Flow vs. Temperature Rise
Model
20 °F 30 °F 35 °F
USGPM ∆P ft. USGPM ∆P ft. USGPM ∆P ft.
800 66.6 2.8 44.4 1.1 38.0 0.8
1000 83.3 4.9 55.5 2.0 47.6 1.5
1200 100.0 6.9 66.7 3.1 57.1 2.4
1400 * * 77.8 4.3 66.7 3.4
1600 * * 88.9 5.4 76.2 4.0
1800 * * 100.0 6.9 85.7 5.1
2000 * * * * 95.2 6.2
* Contact factory for recommendations
Figure 5: Typical Boiler Piping System