INSTALLATION AND OPERATION INSTRUCTIONS
1-20
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
WATER PIPING - SPACE HEATING
1.6.1 General Piping Considerations
The DC series boilers / water heaters include a factory installed, integral
Grundfos UP 15/58 heating pump. The pump is designed to provide adequate
ow through the boiler / water heater and near boiler / water heater piping. The
pump is pre wired.
Primary/secondary piping or the use of a buffer tank / hydraulic separator is
recommended for maximum exibility in multi zone/load applications. Piping
loads in parallel is only acceptable in systems where the minimum ow rate is
guaranteed to be higher than the minimum for the boiler / water heater and the
boilers / water heaters pump is adequate to provide the required ow rate and
pump head for the system.
There are some important details to consider however, and this section of the
Installation and Operating Manual will walk you through them so you can enjoy a
trouble-free installation.
1.6
Figure 22: Overview of piping options
Table 5: Boiler side pump curve
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