Operating instructions

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