Initial Start-up, Inspection and Maintenance
45
Steps
1. Fill and vent heating system
S
ervice
Start-up
1.
Open system isolation valves (if
installed).
Please note:
Before filling the heating system with
water, check that all necessary flow
check valves are installed.
2.
Check inlet pressure of the
diaphragm expansion tank.
If the nitrogen pressure of the
precharged expansion tank is less
than the static pressure of the
system, inflate membrane pressure to
slightly exceed pressure of system.
The static pressure required at the
tank is based upon the static height
of the system. The system fill
pressure value must be equal to the
expansion tank pressure value at
approx. 60 ºF/15.6 ºC.
During fill and removal of air, the boiler
pump can be activated. To activate the
pump, in less than 2 seconds turn
selector dial to stand-by position from
a control range (counter-clockwise) and
then right back into the control range
(clockwise). The pump will run for 30
minutes and cancel the request
automatically. A rotating digital
segment will appear on the display (see
below).
3.
To remove debris and/or sludge
ensure that the system piping is
flushed out. Failure to do so may
cause sediment in the boiler
causing overheating and damage
not covered by warranty.
4.
Optional:
Fill the heating system with water
at the boiler filling tap
and drain
air completely from the drain tap
.
To remove air from the heat exchanger
H
Connect a hose to the boiler filling
tap
and connect the other end to
fresh water supply (or heating
medium).
H
Open the fresh water supply valve
and then open the boiler filling tap
slowly to fill the boiler with water.
Isolation valves (not shown) to
isolate system components must be
closed during fill/bleed process.
H
Flush the boiler heat exchanger via
the boiler supply and return (for at
least 10 mins.) until all air has been
removed from the boiler.
H
When the drain tap
begins to
bleed water, close the boiler drain
valve and open system isolation
valves.
Continued on following page.
System fill pressure must be
approximately 3 psig higher than the
static head when the system is cold.
Water treatment should be
considered in areas where it is known
that boiler feed water contains a high
mineral content and hardness.
In areas where freezing might occur,
an antifreeze may be added to the
system water to protect the system.
Please adhere to the specifications
given by the antifreeze manufacturer.
Do not use automotive silicate-based
antifreeze. Please observe that an
antifreeze/water mixture may require
a backflow preventer within the
automatic water feed and influence
components such as diaphragm
expansion tanks, radiation, etc. A
40% antifreeze content will provide
freeze-up protection to -10°F/-23°C.
Do not use antifreeze other than
specifically made for hot water
heating systems. System also may
contain components which might be
negatively affected by antifreeze.
Check total system frequently when
filled with antifreeze.
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Unsuitable fill water increases the
level of deposits and corrosion, and
may lead to damage to the
equipment.
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Thoroughly flush the entire heating
system prior to filling with water.
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Only use fill water of potable
quality.
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Soften fill water harder than 150
ppm temporary hardness.
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Inhibitors or antifreeze additives
suitable for heating systems may
be added manually.
CAUTION
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