53
VI. Water Piping and Trim E. Multiple Boiler Installation Water Piping (continued)
Figure 38B: Isolation of the Boiler From Oxygenated Water with A Plate Heat Exchanger
(IWH Piped Off System Header)
E. Multiple Boiler Installation Water Piping - See Table 17
and Figures 39B and 40B.
1. Refer to this Section of this manual for:
a. Installation of Factory Supplied Piping and Trim
Components for an individual module (boiler).
b. Regarding an individual module (boiler) piping
system specic details.
c. Selection criteria for individual module (boiler)
space heating and/or DHW circulators.
2. For installations where indirect domestic hot water
heater is combined with space heating, the Alliance
SL™ model must be piped as a separate heating
zone off the system header. The circulator must be
sized based on the Alliance SL™ model coil ow and
combined coil pressure drop and the zone piping total
equivalent length. Refer to Alliance SL™ Indirect
Water Heater literature for a specic model coil ow
and pressure drop. Refer to Table 18 and Figures 40A
and 40B.
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