Metro Therm METROAIR AQUA HPM, Руководство пользователя

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7.6 Table for defrosting
The defrost function runs according to the table for defrosting above. If the T5 temperature
(before evaporator) is equal to a temperature in the table then the defrosting will start, if the
corresponding T6 temperature (evaporator) drops below the temperature in the table. E.g. if T5
is 3 °C, then defrosting will start, when T6 is equal to or lower than -6 °C.
The defrosting function stops immediately if the T6 temperature (in the evaporator) is higher
than the set point in P4. When the defrosting function is active, relay R4 (defrosting) activates
and the fan stops. The defrosting function can run 30 minutes at a time at maximum. The de-
frosting function must be disabled for another 60 minutes, before it can start again.
7.7 Functional description
The flowchart in the About the product sections shows where the sensors are located. The relay
outputs/terminals, as well as the other outputs for operating the fan and the control features,
are shown on the electrical diagram.
T5 before evaporator °C T6 evaporator °C
15 -3
13 -3
11 -3
9 -4
7 -4
5 -5
4 -5
3 -6
1 -7
0 -8
-2 -9
-5 -11
-7 -13
-9 -13
-11 -15
-13 -16
-15 -18
-17 -20
-18 -21
-20 -22
7 Control and Operations