Thermalec Products
– 24THR Instruction Manual (rev 2)
Page 4 of 5
k) Set pool temperature controller to less than 15
C;
l)
Check heater isolation valves are OPEN and water is flowing through the heater;
m) Check that the heater is full of water before proceeding;
n) Check that timeswitch (if fitted) is on and heater control supply is enabled;
o) Switch on the Filter Pump -
Check positive flow of water into pool
;
Amber pump supply lamp ON
p) Switch main power supply to ON;
q) Remove seal from heater circuit breakers and switch ON
Red, White and Amber heater status lamps ON;
r) Set pool temperature controller to desired temperature
Green heater status lamp ON (closing of contactor can be heard);
s) Turn filter pump OFF;
Amber pump supply lamp OFF. Green and Amber heater status lamps OFF;
t) Turn filter pump ON;
u) Reset the timeswitch.
3) WINTER ROUTINE
If the pool is to be closed over the winter damage may be caused by chemically treated water and debris left
standing in the vessel. The following procedure should be followed
a) Switch heater circuit breakers to OFF;
b) Switch main power supply and pump interlock supply to OFF;
c) Remove main cover and check main terminals for tightness;
d) Apply WD40 (or similar to) all electrical components, particularly the contactors;
e) Close heater isolation valves ;
f) Empty vessel using drain valve;
g) Remove drain valve locking screw and check for debris at the bottom of vessel with 6mm dowel rod.
If rod cannot be fully inserted then consideration should be given to opening the vessel to remove debris.
If the pool is to be kept in semi-operation during the winter then the heater may only be left full of water if the
filter pump is fitted with a frost-stat.
4) FAULT - FINDING
Safety Warning.
The electrical supplies to the heater are potentially lethal. All maintenance and repair
operations should be carried out by trained personnel, supported by appropriate safe systems of work. Before
removing the top cover ensure that, both the main power supply and, the pump interlock supply, are both
isolated.
Status Lamps.
The lamps on the front panel monitor the heater and give indication of any faults that may
have developed in the system. The lamps will light in sequence 1 through 6. The green lamps will only light
(and the pool water be heated) when the others are all lit. The following actions should be taken if any of these
lamps are not lit,
