Specifications; General; System - Rinnai Prestige Operation & Installation Manual

GENERAL

Split solar hot water systems are specified according to 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 for the various components are shown below.
System Type
Solar flow and return connection:
PTR valve connection:
Cold inlet connection:
Hot outlet connection:
PTR valve setting
Rating of PTR Valve supplied
Expansion Control Valve (ECV) setting
Max supply pressure with ECV
Max supply pressure without ECV
Pressure limiting valve rating
(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 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 is high enough the pump is activated and water passes through the collectors
collecting solar energy. When the differential falls the pump turns off.
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. With 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.
When the controller is in low temperature mode it will also circulate water through the collector when the roof
temperature becomes cold. This is to prevent damage to the system due to freezing. See page 23 for more
details.
Rinnai

SPECIFICATIONS

Glass Lined Glass Lined
Cylinders Cylinders
175, 215,
160, 200
Rp ½
Rp ½
Rp ¾
Rp ¾
1000 kPa
10 kW
850 kPa
680 kPa
800 kPa
500 kPa
13
Stainless Steel
270,320,
Cylinders
250,315
Rp ½
Rp ½
Rp ¾
Rp ¾
850 kPa 850 kPa
10 kW 10 kW
700 kPa 700 kPa
550 kPa 550 kPa
680 kPa 700 kPa
500 kPa 500 kPa
Rp ½
Rp ¾
Rp ¾
Rp ¾
Split Solar OIM