1-19
INSTALLATION
HC SERIES BOILERS HC 13-50, HC 23-84, HC 29-106, HC 33-124, HC 20-125, HC 33-160
WATER PIPING - SPACE HEATING
1.6.1 General Piping Considerations
The HC series boilers include a factory installed, integral Grundfos UPS 15/58
heating pump. The pump is designed to provide adequate ow through the boiler
and near boiler piping. The pump is pre wired and factory set to speed #3.
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 and the boilers 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
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