Viessmann Vitocal 300-G Installation And Service Instructions Manual page 9

Installation
(cont.)
Information on the use of accessories
for a heating/cooling circuit or sepa-
rate cooling circuit
AC-Box for active cooling function
■ The AC-Box can only be used up to a
rated heating output of
higher rated heating outputs, install all
the components required on site (with
correspondingly sized plate heat
exchanger) for the heating/cooling cir-
cuit or the separate cooling circuit.
NC-Box for natural cooling function
■ The NC-Box can only be used up to a
rated heating output of
higher rated heating outputs, install all
the components required on site (with
≤ 17.6 kW. For
correspondingly sized plate heat
exchanger) for the heating/cooling cir-
cuit or the separate cooling circuit.
■ In two-stage heat pumps, the NC-Box
cannot be installed immediately
above the heat pump. The hydraulic
connection lines between heat pump
stage 1 and heat pump stage 2 are
installed above the heat pumps.
Preparing for installation
≤ 16 kW. For
9