Application Distributed
Considerations Pumping
System
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Figure 12: Distibuted pumping installation
General
Adistributed pumping system con- tains either a single or dual pump module connected directly to the units supply and return source side. This design requires individual pump modules specifically sized for each water source heat pump. Cen- tralized pumping is not required.
See Figure 12 for a distributed pumping installation.
Earth Coupled
Application
Ball valves should be installed in the supply and return lines for unit isolation.
Flexible hoses may be used to connect the water supply and return lines to the water inlets and outlets. These hoses reduce possible vibration between the unit and the rigid system.
Note: Hoses and or pipes should be braided stainless steel, and sized suitable for the system’s water pressure and flow rate.
Load side connections are used to supply the terminal device.
The sound attenuation pad should be slightly oversized for the unit. This field supplied product is recommended for sound absorption of unit.
The low voltage control con- nection provided on the unit is large enough for attaching con- duit.
The ground loop pump mod- ule is designed for circulating commercial loops that require a maximum flow rate of 20 gpm.
The line voltage disconnect should be installed for branch circuit protection. The unit is supplied with an opening for attaching conduit.
All polyethene pipe in the closed loop design should be insulated to eliminate the risk of sweating.
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