Heating System - Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual

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

Heating system

with existing
primary loop.
Internal primary
3/8"/10mm Open
End Wrench may
loop ball valves
be required to
closed turn valve
FIGURE 5-7B Single Boiler Using Primary/Secondary Pumping With Open External Primary Loop
Heating Load Heating Load
12"(305mm) Maximum
separation
Heating Load
Existing closely spaced tees
12"(305mm)
in primary system loop
Maximum
separation
Limit length
CH/System
to
Pump
5' (1.6m)
Internal primary loop
ball valves open.
Heating system
3/8"/10mm Open
without existing
End Wrench may
primary loop.
be required to
turn valve
17