Cold Feed And Expansion Tank Height For Open Vented Systems; Safety Valve; Gas Connection; System Pump - REMEHA Quinta 45 Technical Information

Remeha
Quinta 45/65

7.4.3 Cold feed and expansion tank height for open vented systems

We recommend the boiler is installed on a closed (pressurised) system wherever pos-
sible with a minimum operating pressure of 0.8 bar. However, open vented systems
can be accomodated as follows: The cold feed and expansion tank heights for all open
vented systems must comply with the requirements laid down in the Health and Safety
Executive publication PM5.
The Remeha Quinta series boilers require a minimum static head of 3 M.

7.4.4 Safety valve

A safety valve should be fitted in accordance with BS 6644 and BS5440. Recommen-
ded minimum size of 22mm (full bore type).

7.4.5 Gas connection

Connect the boiler to the incoming gas in accordance with the requirements of the Gas
supply company. Install the main gas cock near the boiler. The gas connection is loca-
ted at the bottom of the boiler. Fit a gas filter in the gas supply piping to avoid debris in
the gas control unit.
NOTE: The boiler is suitable for both natural gas and propane firing.
It is supplied as standard set for natural gas, therefore an adjustment to the gas valve
and the fan speed setting must be carried out BEFORE the boiler is fired and commis-
sioned for the first time on propane (ref. Par. 9.1).

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 ther-
mostat (not a Broag supply), a 3-way diverting valve or DHW pump, can provide boos-
ted 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.
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