Senztek SolaStat-Plus-ET Installation Manual - page 5
Installation Guide for the SolaStat™-Plus-ET
Version 1.2 – July 2011
Page 3
F
UNCTIONS
C
ONTINUED
S
S
m
m
a
a
r
r
t
t
F
F
u
u
n
n
c
c
t
t
i
i
o
o
n
n
s
s
There are a number of built in functions that enable the SolaStat
TM
-Plus-ET
to manage temperature and power usage efficiently:
ENERGY TRANSFER function allows excess hot water to be transferred
to an external load when the tank reaches to an adjustable preset
temperature. An external load can be swimming pool, under floor heating,
spa pool, etc.
FROST function will protect the solar collector from freezing in mild frost
areas. This will turn on the pump to move a small amount of water
through the collector.
PUMP TIMER function is to assist in pump cavitation recovery. After the
pump has run continuously for approximately ten minutes, it will turn off
for one minute. The one minute turn off period helps any accumulated air
to escape from the pump and has been effective as a backup in
exceptional conditions. This feature can help prevent the pump running
for hours in a ‘locked up’ state, increasing the installation reliability. This
will not affect normal operation in a standard hot water collector and
cylinder installation. Also refer ‘Plumbing Issues, Cavitation’.
SMART SHUTDOWN function will shut the system down in the case of a
shorted sensor or wire, or where the temperature at either sensor is
outside the specified temperature range of -40ºC to 150ºC.
TOPOUT function will protect the hot water tank from over heating which
can lead to pressure problems.
WINTER MODE function allows different external load to be set up.
20ºC LOCKOUT function is activated if the collector is equivalent or less
than 20ºC since the collector will not contribute any useful heat, even to
cold water. The controller will not turn the pump on under differential
conditions unless FROST condition is detected. Hysteresis applies.
Low Voltage Option makes it possible to safely run the unit near the water
but still have a remote mains powered pump.