Specifications For Systems; General; System Specifications And Dimensions; Flow Control Valve - Rinnai PRESTIGE Operation & Installation Manual

SPECIFICATIONS FOR SYSTEMS

GENERAL

Split solar hot water systems are specified according to the grade of storage cylinder material, cylinder
capacity, number of solar collectors and boost type and capacity. Boost capacity for gas boosted
system depends on the gas booster model selected. Boost capacity for electrically boosted systems
depends on the power rating of electric heating elements and whether one or two electric heating
elements are fitted.

SYSTEM SPECIFICATIONS AND DIMENSIONS

Specifications and principal dimensions for the various systems and components are shown below.
Table 2 - System Specifications
System Type
Connections:
Solar flow and return
PTR Valve
Cold Inlet
Hot Outlet
PTR Valve setting (kPa)
Rating of PTR Valve supplied (kW)
Expansion Control Valve (ECV) setting
(kPa)
Max supply pressure with ECV (kPa)
Max supply pressure without ECV
(kPa)
Pressure limiting valve rating (kPa)
(supplied by installer if required)


FLOW CONTROL VALVE

A flow control valve is fitted to the pump and controller assembly.
It's purpose is to allow the water flow rate through the collector collectors and storage cylinder to be
controlled to optimise the performance of the system.


DIFFERENTIAL TEMPERATURE CONTROLLER

The primary task of the differential temperature controller is to control the operation of the pump to
optimize solar energy collection. This task is performed by measuring the temperature differential
between the hot sensor and the cold sensor. When the differential exceeds 9°C the pump is activated
and water passes through the collectors collecting solar energy. When the differential falls below 5°C
the pump is shut down.
A secondary task of the controller is to stop energy collection when the cylinder is full of hot water.
This is referred to as no load protection and the pump is shut down if the temperature of the water
going to the collectors exceeds 65°C. At such a temperature in the base of the cylinder, the
temperature of water in the top of the cylinder is expected to be about 85°C.
Rinnai Australia
Rinnai 'Sunmaster' Rinnai 'Sunmaster'
Systems
SG175, SG215,
SE160, SE200
1/2"
1/2"
3/4"
3/4"
1000
10
850
680
800
500
- 10 - Solar Split Systems Operating / Installation Manual - Version 8 - 18/10/10
Systems Rinnai 'Prestige'
SG270, SG340,
SE315
1/2"
1/2"
3/4"
3/4"
850
10
700
550
680
500
Systems
1/2"
3/4"
3/4"
3/4"
850
10
700
560
700
500