7
7
Installation
Position the calorifiers as required, ensuring that
side and inspection opening clearances are ad-
equate. Fit unions to all pipe connections ensur-
ing that joint seals are fitted. Fit isolating valves
to all pipework.
Installation and Piping Layouts
Note: The CT-plus calorifier is fit-
ted with a separate DHW drain
tapping. The primary drain must
be fitted off the primary outlet
connection in the site pipework.
Piping layout
For the general design of water circuits refer to
current British Standards and Codes of Practice.
A simple pumped primary flow and return, ad-
equately vented, is all that is needed. Secondary
To facilitate venting during drain
down on unvented secondary
systems, ensure that a manual
vent valve is fitted in the second-
ary flow between the calorifier
and the isolating valve. On open
vented systems the vent should
be taken from the same place.
Recommended Primary Systems
Key
(1) Safety Valve recommended if not
on adjacent boiler or system.
(2) Spring loaded non-return valve.
(3) Isolating valves.
(4) Primary pump (For diagram “B”
the main circulating pump may be
used if sufficient head is available).
(5) Thermostat (linked to primary
pump to control calorifier DHW tem-
perature, for Diagram A).For diagram
B the thermostat controls the divert-
ing valve.
On Unventedsystems there is also
a limit stat fitted.
(6) Drain cock.
(7) Diverting valve (use 30 second
motor).
A
B
1
AAV
2
3
4
5
3
3
6
Primary Connections from Main Headers.
Temperature control by pump.
Primary
Water
Secondary
Water
Anti-thermal
loop
connections are quite conventional. Connect the
calorifier(s) to the rest of the system according
to the chosen layout. Examples of both primary
and secondary systems are shown below:
1
AAV
5
4 (if Required)
3
6
Primary Connections from Main Headers.
Temperature control by diverting valve.
3
7
Primary
Water
Secondary
Water
Installation and Piping Layouts.
Installation
Position the calorifiers as required, ensuring
that side and inspection opening clearances
are adequate. Fit unions to all pipe connections
ensuring that joint seals are fitted. Fit isolating
valves to all pipework.
Installation and Piping Layouts
Note: The CT-plus calorifier is
fitted with a separate DHW drain
tapping. The primary drain must
be fitted off the primary outlet
connection in the site pipework.
Piping layout
For the general design of water circuits refer to
current British Standards and Codes of Practice.
A simple pumped primary flow and return, ad-
equately vented, is all that is needed. Secondary
To facilitate venting during drain
down on unvented secondary
systems, ensure that a manual
vent valve is fitted in the second-
ary flow between the calorifier
and the isolating valve. On open
vented systems the vent should
be taken from the same place.
Recommended Primary Systems (Open vented DHW system)
Key
(1) Safety Valve recommended if not
on adjacent boiler or system.
(2) Spring loaded non-return valve.
(3) Isolating valves.
(4) Primary pump (For diagram “B”
the main circulating pump may be
used if sufficient head is available).
(5) Thermostat (linked to primary
pump to control calorifier DHW
temperature, for Diagram A).For
diagram B the thermostat controls
the diverting valve.
(6) Drain cock.
(7) Diverting valve (use 30 second
motor).
Note:
On Unvented systems there is a high
temperature limit thermostat fitted.
The installer should wire this back
to the control valve / primary pump
and also a 2 port motorized valve.
This should be fitted on the primary
inlet, to stop the flow of primary water
entering the calorifier in the event of
a high temperature condition.
connections are quite conventional. Connect the
calorifier(s) to the rest of the system according
to the chosen layout. Examples of both primary
and secondary systems are shown below:
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