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Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler User Manual

Page 17

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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