Operation Principle; Safety Devices - Rinnai Enduro XL SP250B Operation & Installation Manual

WARNINGS AND IMPORTANT INFORMATION

OPERATION PRINCIPLE

Rinnai pumped low profile roof mounted systems are designed to have all components mounted on a flat roof.
The system comprises a hot water storage cylinder, solar collector(s), pump, controller, temperature sensors and
a gas booster.
Water is pumped from the storage tank to the solar collectors when there is enough energy available from the sun.
The solar controller utilises information from the sensors to manage this process.
Supplementary heating is provided using a gas booster if insufficient heat is available from sun (such as during
cloudy or rainy weather or during winter months).
The following diagram illustrates the operation principle.
hot
sensor
hot water
from collector
to cylinder
heated water from

SAFETY DEVICES

The water heating system is supplied with various safety devices including temperature sensors, overheat sensors
and switches and a Pressure & Temperature Relief (PTR) valve. These devices must not be tampered with or
removed. The water heating system must not be operated unless each of these devices is fitted and is in working
order.
DO NOT tamper with or remove safety devices.
DONOToperatethewaterheaterunlessallsafetydevicesarefittedandinworkingorder.
WARNING
DO NOT block or seal the PTR Valve and drain pipe.
Pressure & Temperature Relief (PTR) Valve
This valve is located near the top of the water heater
and is essential for safe operation. It is normal for the
valve to release a small quantity of water through the
drain line during heating.
However, continuous leakage of water from the valve
and its drain line may indicate a problem with the
water heater.
Rinnai
gas booster
cold sensor
on cylinder
cold water in
warm water from tank
to gas booster
Tw ist cap until w ater
flow s from drain line
6
cool water from
cylinder to collector
Lift lever until w ater
flow s from drain line
(Low er lever gently!)
Low Profile Roof Mounted OIM