HIGH-TEMPERATURE AIR-TO-WATER HEAT PUMPS
61AF 022-105
Units with fans with available pressure for
indoor installation (option 11)
This option applies to 61AF units installed inside the building
in a plant room. For this type of installation the cold air leaving
the air-cooled evaporators is discharged by the fans to the
outside of the building, using a duct system.
The unit is supplied with a grille on the discharge side.
This grille has to be removed before connection to the duct
system.
The installation of a duct system at the air evaporator
discharge line causes a pressure drop due to the resistance
caused by the air flow.
It is advisable to make the connection to the duct system
with a flexible sleeve. If this recommendation is not observed, a
lot of vibration and noise may be transmitted to the building
structure.
Therefore more powerful fan motors than those used for the
standard units are installed in the units with this option. For
each installation of a unit installed inside a plant room the
duct pressure drops differ, depending on the duct length,
duct section and direction changes.
Applicable rules for units
incorporated into an air duct
system
61AF units equipped with fans with available pressure are
designed to operate with air discharge ducts with maximum
pressure drops of 100 Pa.
Ensure that the suction or discharge inlets are not accidentally
obstructed by the panel positioning (e.g. low return or open
doors etc.).
Fan discharge connection
CONTROLS
AIR TREATMENT
HEATING
A square flange is supplied mounted on the unit. An
available standard round flange can easily be installed at
the fan discharge, if the installer prefers the use of a round
connection duct.
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