Viessmann VITOCAL 200-G, Инструкция по установке и обслуживанию

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Systems without heating water buffer cylinder
Never install a mixer to safeguard the
minimum heating water circulation
volume.
Natural cooling function
During the summer months the tem-
perature level of the primary circuit
can be used to cool the building.
The natural cooling function is a
method of cooling buildings that
saves a considerable amount of
energy. All that is needed is a small
amount of electricity for the circulation
pumps to access the "cooling source"
in the ground.
During the cooling operation, the heat
pump will only be started to provide
DHW. The heat pump control system
actuates the circulation pumps, diver-
ter valves and mixers and records the
temperature via the natural cooling
extension kit.
Alternatively, this function can also be
covered by on-site components (for
an on-site wiring suggestion, see the
Vitocal 200/222/242 technical guide).
A contact humidistat monitors the dew
point.
The capability of the natural cooling
function cannot generally be com-
pared with that of air-conditioning
equipment or water chillers. Natural
cooling provides no dehumidification. The cooling capacity depends on the
heat source temperature, which itself
is subject to seasonal fluctuations.
Experience has shown that the cool-
ing capacity is higher at the beginning
of summer than at the end. In addi-
tion, the water source temperature
curve is subject to the cooling
demand of the building. Because of
large window areas or internal
sources (lighting, electrical equip-
ment), the heat source temperature
increases more rapidly during the
course of a year than it does if less
cooling is required.
Underfloor heating systems and con-
crete core tempering are available for
cooling the building; radiator heating
systems are unsuitable for this pur-
pose. Ensure that any installed room
thermostats are able to be opened
manually or by servomotors when
using the cooling function.
Function description of systems
(cont.)
13
Preparing for installation
55
92
968
GB
Installation