Noritz GHQ-C2801WX-FF US, Руководство по установке, Страница: 47 / 84

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9.5 Freeze Prevention
9.5.1 Unit
Indoor Installation
• This Combi Boiler has functions to protect itself
from freezing by operating the pump and turning
on the burner when the thermistor detects lower
than 39°F (4°C).
• Freezing is prevented within the device
automatically unless the outside temperature
without wind is below -30°F (-35°C).
* When combustion air is supplied from the
indoors, the room temperature must be greater
than 32°F (0°C) to prevent freezing and the room
inside must not have negative pressure.
• If this model is installed in an area where
the outside temperature can reach freezing
conditions of -30°F (-35°C) or below, then
additional freeze protection measures must be
used. For temporary freeze protection measures,
refer to the Owner’s Guide.
Outdoor Installation
For information about outdoor installation, contact
Noritz America at 1-866-766-7489.
Both Indoor and Outdoor Installation
• The freeze prevention will not prevent freezing in
the external plumbing of the unit.
Protect this plumbing with insulation, heat tape
or electric heaters, solenoids, or pipe covers.
• In order for the freeze prevention to operate, the
unit must have power at all times.
• Freezing is prevented within the Combi Boiler
automatically unless the outside temperature
without wind is below -4°F (-20°C).
• If this model is installed in an area where the
outside temperature can approach freezing
conditions of -4°F (-20°C) or below, then
additional freeze protection measures must be
used.
CAUTION
9.5.2 Heating System
• Freeze protection products may be used for the
heating system. Freeze protection for new or
existing systems requires specially formulated
glycol, which contains inhibitors to prevent
the glycol from attacking the metallic system
components.
• Before using freeze protection products,
ensure that system fluid contains proper
glycol concentration and the inhibitor level is
appropriate. It is recommended that against
exceeding a 35% concentration of glycol.
• When using freeze protection products, the
system must be tested at least once a year, and as
recommended by the manufacturer of the glycol
solution.
• When using the freeze protection products,
allowance should be made for expansion of the
glycol solution.
NOTE Freeze damage is not covered by the
warranty.
When using freeze protection
products, it is recommended to
plug the Auto Feeder Water Inlet
Connection and set “Auto Feeder
Activation” OFF.
* Refer to page 62 for changing “Auto
Feeder Activation” Setting.
Connecting the Heating Pipe