4
Description of CT-plus Calorifier
CT-plus calorifiers are designed to operate with
the full range of Hoval boilers up to 3.10 Bar pri-
mary pressure, and are intended for the produc-
tion and supply of DHW to commercial and indus-
trial premises.
The CT-plus is available in four model sizes with
high performance outputs up to 1590 litres per
hour.
General Details
The construction of the CT-plus is in the form of a
vertical, free standing unit, comprising a high grade
stainless steel inner vessel with a “rippled”wall to
enhance heat exchanger efficiency. This is sur-
rounded by a mild steel primary water jacket, which
is encased with steel sheet insulated panels. The
assembly is mounted on four legs with the primary
flow and return connections on the side. On all
four models, the secondary flow is from the top
and the smallest model (CT-plus 180) also has
the secondary return and cold feed connections
at the top. For the three larger models, all the con-
nections other than secondary flow are at the base.
Applications
Performance of the four CT-plus models covers a
range of outputs up to an hourly rating of 1590
litres/hour. Higher outputs can be provided by ar-
ranging the units in modular formation. For most
typical applications (other than process water gen-
eration) the key requirement is for adequate quan-
tities of hot water over a relatively short period. On
this basis, the CT-plus will provide significantly
higher flow rates than its continuously hourly rate.
Key Features
•
Minimum floor area, fits through standard
doorway.
•
Suitable for use with any make of boiler
•
High efficiency heat transfer for rapid
D.H.W. regeneration.
•
Recirculation design removes danger of
temperature stratification.
•
Optimum D.H.W. storage - sufficient for quick
draw-off but with lower standing losses than
conventional large volume calorifiers.
•
Low level connection for complete draining
and flushing out. (CIBSE TM 13:2000
Recommendations to prevent Legionella
Bacteria Contamination).
•
Very low primary and secondary resistances.
•
Electric immersion heaters can be fitted by
prior arrangement.
•
Large heating surface, suitable for operation
with lower temperature primary feed from
condensing boilers.
•
See Appendix 5 for unvented systems and
the additional equipment required.
Internal view of CT-plus Calorifier
1. Primary Inlet
2. Primary Outlet
3. Cold feed
4. Secondary Flow
5. Secondary Return
6. Drain
7. Primary air release
cock
8. High efficiency
insulation
9. Non-corrosive
stainless steel cylinder
10. Special “ripple” inner
shell to enhance
heat transfer
11. Primary water
surrounds DHW
cylinder
12. Thermostat(s)
13. Inspection and cleaning
cover
(CT-plus 280-520)
7
4
12
13
1
2
8
10
3
9
6 5
11
T&P valve on unvented
calorifiers only
