Heating Curves - Danfoss DHP-AT Installation Manual

Installation Guide DHP-AT
The refrigerant circuit's high pressure side is equipped with a high pressure switch (6) and an over-pressure bypass valve (5).
The high pressure switch activates when its break pressure is reached, whereupon the compressor stops and the heat pump's normal
operation is blocked.
If the high pressure switch is activated an alarm indicator flashes on the control unit's control panel and an error code appears in the
control panel display.
If the operating pressure reaches and exceeds the pressure level of the over-pressure bypass valve (5), the valve will unload the pressure
to protect the compressor. No alarm is connected to this protector.
If the low pressure switch (7) registers too low pressure in the refrigerant circuit, the heat pump's normal operation is blocked, an alarm
indicator on the heat pump's control panel flashes and an error code appears in the control panel display.
Compressor (8)
The compressor is equipped with an internal temperature protector that stops the compressor if there is a risk of overheating. The inter-
nal temperature protector cannot be reset manually, the compressor must cool down before it can be restarted. No alarm is connected
to this protector.
The discharge pipe temperature sensor (10) stops the compressor at too high pressurised gas temperature. This is indicated by an error
code in the control panel display. The stop is ceased when the temperature becomes normal.
Fan (9)
The fan motor is equipped with an internal overheating protection. The internal temperature protector can not be reset manually, the
fan motor must cool down before it can be restarted. No alarm is connected to this protector. If this protector is triggered during opera-
tion and the fan stops, a high pressure or low pressure alarm may be triggered as a consequence.
Alarm mode
If an alarm that affects the heat pump's normal operation is activated, an error code is presented in the control panel display.
Internal electrical heater with overheating protection (11)
The internal electrical heater consists of an electric heating element mounted on the heating system supply line. It has an overheat pro-
tector that switches off the electric heating element if it is at risk of becoming overheated.
If the overheat protector is activated an alarm indicator flashes on the heat pump's control panel and an error code appears in the con-
trol panel display.
The overheat protector is reset by pushing the reset button, which is on the overheat protector inside the unit. This alarm is not auto-
matically reset.
4.5

Heating curves

The heat pump will automatically adjust the water temperature according to the following:
Danfoss Heating Solutions VMGFI302
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