Euroclima ZHK, Руководство пользователя

Страница: 71 / 142

Instruction Manual ZHK
70/140 V07-21.0
Hydraulic connection schemes of a heating or a cooling coil should be carried out as shown in the
scheme
Figure 164
with a three way valve used as a mixing valve. Compared with a flow control
using a straight-through valve, this connection avoids unequal temperature profiles, in that way air
heating or cooling is quite uniform along the coil surface.
Figure 164:
Hydraulic connection scheme
In order to vent and drain the heat exchanger connection, valves are mounted (on request). To en-
sure that the correct operation is undertaken, it is important that the vent is on the highest point of
the whole water cycle and the drain at the lowest. Otherwise, the valves need to be mounted on
another suitable point on the circuit.
Figure 165:
Drain valve
Figure 166:
Vent valve
6.1.2 Steam heat exchanger
The heater is heated to above 70 °C, next to the heater are plastic parts which have been installed.
To prevent damage of the plastic parts, it is the responsibility of the client to undertake the follow-
ing instructions:
-
Supply and installation of thermostat
-
thermostat trigger temperature: 70 °C
-
thermostat probe position: approx. 100 mm downstream of airflow through steam heat ex-
changer / approx. 100 mm below the top panel
-
A thermostat must be integrated into the AHU control system so that the steam supply valve
closes in the event of the temperature exceeding the trigger stated above.
-
Function: interruption of steam supply at over-temperature. For example, because of a lack air-
flow.