T E C H N I C A L A N D I N S T A L L A T I O N
2
1. OPERATION
A = Stainless steel internal tank
B = STW 22 carbon steel exterior tank
C = High density polyurethane foam insulation
D = Heating fluid entry point
E = Heating fluid outlet point
F = Sanitary hot water outlet
G = T & P relief valve connection
H = Cold water inlet
I = Control thermostat
K = Control thermostat pocket
L = Primary air vent
M = Co-polymer polypropylene top cover
N = Co-polymer polypropylene jacket
Principle:
ACV Tanks (tank in tank) comprise of two concentric water cylinders. Tank (A) is manufactured in solid
stainless steel and contains the domestic water for use at the sanitary hot water outlets. The exterior tank
(B) is manufactured from STW 22 carbon steel, this tank holds the primary heating fluid which is circulated
from the boiler, as the primary fluid passes between the two tanks the heat is transferred to the domestic
water.
Operation:
When the thermostat (I) calls for heat the primary pump is activated (or motorised valve is opened) and
primary fluid is circulated in the outer tank and transfers its heat to the domestic water. Once the
thermostat set temperature is achieved it will open and deactivate the primary pump (or close the
motorised valve). Initial heating from cold will take between 10 and 20 minutes (depending on tank size
and boiler output) – when operating temperature is achieved the recovery becomes faster.
Operational Cycle:
