SolaSmart Plus™ User Guide
Version 2.0 – September 2013 Page 2
SOLAR CONTROL
Differential The SolaSmart™ solar harvesting works by turning the pump on when the
difference
The pump turns off when the difference is less ‘Pump Off’ (Collector has cooled
and/or tank has heated up). This process repeats as the tank heats up.
between the temperature at the solar hot water collector (ROOF) and
the lower part of the tank (INLET) is at a set level ‘Pump On’
FROST The FROST function is designed to protect your collector and hot water system
from freezing and bursting. When this temperature is reached, the pump will
come on just enough to raise the temperature of the water by 2-3°C. Only a
small amount of warm water is needed to protect the collector and plumbing.
When the unit is in Frost Mode, the PUMP light will come on.
Topout The Topout temperature is the maximum temperature that the system will allow
the tank to heat to.
Topout Simple: The standard Topout method (Topout Simple) stops the solar
pump from working when the tank reaches Topout temperature. Topout also
works with the collector (roof) temperature so that BOTH the Tank and the
Collector must be below their respect maximum temperatures. The solar
harvesting cannot re-start until the collector cools down also (often after sun
down).
Advanced Topout: Advanced Topout function is an alternative to Topout
Simple that will allow the system to re-start solar harvesting if the tank
temperature falls below Topout but the Collector is still at Stagnation
temperatures.
This function can only work safely if the solar return pipe is below the upper tank
sensor (Tank).
Recovery is achieved by a three stage system which includes pulsing water
through the collector, the delay between pulses allows the dissipation of heat in
the pipes such that any steam should condense and not be present when the
water re-enters the tank and thus avoiding steam implosions (loud banging
noises in tank).
Also the Advanced Topout delays the onset of Stagnation with a 3 stage system
of actions.
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