HELIX VX-050 Installation, Operation & Maintenance Manual page 17

5 - HYDRONIC PIPING
FIGURE 5-7A Single Boiler Using Primary/Secondary Pumping With Closed External Primary Loop
12"(305mm) Maximum
separation
12"(305mm)
Maximum
separation
Existing closely spaced tees
in primary system loop
CH/System
Limit length
Pump
to
5' (1.6m)
FIGURE 5-7B Single Boiler Using Primary/Secondary Pumping With Open External Primary Loop
12"(305mm) Maximum
separation
Existing closely spaced tees
12"(305mm)
in primary system loop
Maximum
separation
Limit length
CH/System
to
Pump
5' (1.6m)
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