Pump Curves & Primary – Secondary Piping; Unit Controls & Zoning - Quietside DPW-099 User Manual

Pump Curves & Primary – Secondary Piping
The DPW units include a pump assembly that is used to provide the flow through
the unit heat exchangers, and has a nominal flow of heating water for external
piping arrangements.
This pump is not designed to be the system pump providing flow to radiant loops
or baseboard.
Therefore Quietside insists on using a Primary – Secondary pumping
arrangement, the recommended method uses the traditional large diameter
Primary loop
The main circulation pump or the zone pumps will then provide circulation into
the zones or the heating system
The only exception to this Primary – Secondary rule is for Air Handling units with
a hot water coil where the Air Handling unit is located less than 10ft from the
DPW unit.
Unit Controls & Zoning
A DSR-100F Controller is provided with the unit.
This is not used as a thermostat, but is a unit controller and should be mounted
adjacent to the DPW unit. It is connected to the DPW via the 2 Yellow wires and
is powered by 20V DC.
The DSR controller allows both the heating loop and DHW water temperatures to
be set
When the unit is started using the X – X or dry contacts on the microprocessor it
will operate and provide heating loop water at the set temperature until the
zone(s) are satisfied. If a DHW call is experienced during heating operation the
unit will automatically switch over to provide DHW.
DO NOT APPLY 24V AC OR LINE VOLTAGE TO THE X – X CONTACTS
UNIT MICROPROCESSOR WILL FAIL IF IT RECEIVES 24V AC OR LINE
VOLTAGE ON THESE CONTACTS
It is not permissible to power the secondary loop pump from the Primary loop
pump installed in the unit.
Power for the Secondary loop pump should come from a switching relay e.g
Taco SR501
71