Installation guide

14 | Rinnai Continuous Flow Water Heating Specication Guide 02-13
Circulating ring mains with Rinnai Innities
Hot water immediately when you turn on the tapcirculating ring mains give hot water
instantly at all outlets.
Notes on circulating systems with
Infinity water heaters
Cylinder volume should be > 10 x
the pipe volume between the Rinnai
water heater and cylinder.
Temper outlets as required with
point-of-use tempering valves.
To minimise running costs the
circulating pump can be controlled
by a timer to ensure it only runs
during hours of normal water use. The
pump can be further controlled by a
thermostat to turn off the pump once
the water in the ring main is up to
temperature.
High temperature circulating ring main
To Drain
Building Flow
Building return
Expansion
tank
GAS
Cold
Supply
REUMSBMB
(MECS master
slave kit)
Electric cylinder
Set point 65 ºC
Pumps for domestic and small commercial systems
Grundfos UP 15-14B 15 mm
Grundfos UP 20-14BX 20 mm
Pump accessories
Thermostat Add suffix ‘T’ to code
Timer Add suffix ‘U’ to code
Timer & thermostat Add suffix ‘UT’ to code
Gas
>60°C
Cold
inlet
UV Steriliser
<55°C
Unit 1 Unit 2 Unit 3
Unit 4 Unit 5
Low temperature circulating ring main
Low temperature ring mains are
becoming popular as an economic
and reliable solution for larger
installations.
Reduce installation and maintenance
costs by eliminating tempering valves
at each outlet.