System Pump; Waterflow; Dhw Production - REMEHA Quinta 45 Technical Information

7.4.6 System pump

The boiler must be installed on a fully pumped system.

7.4.7 Waterflow

The Quinta series of boilers have no minimum water flow requirement provided the
factory default modulation start point (parameter *) is not raised and the following
conditions are met:
- the two wire modulating controls are used,
- on a pressurised system with the high limit temperature set to flow temperature set
point + 20.

7.5 DHW production

The Remeha Quinta 45 and 65 is supplied as standard with an inbuilt DHW control.
This control, when used in conjuction with the optional Broag DHW sensor or
thermostat (not a Broag supply), a 3-way diverting valve or DHW pump, can provide
boosted primary flow temperature independent of the variable temperature flow for
the fully condensing mode. However it can be independantly time controlled and will
isolate the HTG system during the demand period.
NOTE: For multiple boiler installations the DHW pump option must be used.
On demand of the DHW sensor or thermostat and depending on parameter J
(reference: Par. 6.6.11), the boiler:
- either operates the three way valve diverting flow water from HTG to the calorifier
(Note: please refer to the resistance graph below) or
- powers the DHW pump and turns off the HTG or boiler pump.
Fig. 10 DHW three way valve resistance graph
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