High and low temperature versions
The PRS module is available in two primary circuit variants. Models for high temperature systems (primary circuit above 60–65°C) incorporate a motorised 3-way mixing valve to prevent limescale deposits inside the exchanger. Low temperature versions are suitable for primary circuits operating below this threshold.
Three exchanger sizes
The PRS 4620 is recommended for high temperature systems; the PRS 7420 is preferred for low temperature applications; and the PRS 8031 is specified for high DHW demand. Minimum DHW flow rates apply: 0.60 m³/h (10 l/min) for the PRS 4620, 0.66 m³/h (11 l/min) for the PRS 7420, and 1.68 m³/h (28 l/min) for the PRS 8031.
Instantaneous or semi-instantaneous operation
The Juniper PRS can operate without accumulation for instantaneous DHW production, or with a DHW storage vessel for semi-instantaneous operation. When used with accumulation, the storage vessel acts as a buffer to meet peak demand, and smaller PRS modules may be appropriate. For accumulation configurations, a Juniper DHW storage vessel is recommended to complete the installation.
Single or double pump
Each module is available with either a single or double primary circuit pump. The double pump configuration provides backup through alternating operation, ensuring greater system redundancy and continuity of hot water supply.
Three exchanger sizes:
PRS 4620, PRS 7420 and PRS 8031Available for high and low temperature primary circuits
Single or double pump configurations
Inspectable plate heat exchanger with AISI 316L stainless steel plates and EPDM gaskets
Motorised 3-way mixing valve (high temperature models)
Galvanised steel frame
230V AC single phase supply
Maximum working pressure: 10 bar
Maximum gasket temperature: 140°C
Programmable control unit with backlit display
Anti-legionella disinfection cycles — schedulable by time and day
DHW recirculation function control
Proportional control of primary pump speed for operational efficiency
Heat exchange computation on a daily and weekly basis
Diagnostic function for temperature and flow probes
Optional insulation (mineral wool and aluminium case, M0-A1 fire class)
Optional Data Logger for remote monitoring and anti-legionella data recording
*Subject to Terms & Conditions
