Thermia ATEC Installation Guide

8.9 OPTIMUM
Parameter Meaning
TEMP DIFF CIRC. Desired temperature difference between supply and return line for the heating system.
Factory setting: 8°C, range: 0°C – 15°C,
START FLOW CIRC. Setting the speed a speed controlled circulation pump must start with.
Check using MANUAL TEST -> CIRC. PUMP which speed gives sufficient flow. This is indicated by ”F”in the dis-
play (flow sensor closed).
The start flow is maintained one minute before control goes to speed control the circulation pump.
Factory setting: 7V, range: 3V – 10V
CONST. FL. CIRC.
If TEMP DIFF CIRC. is set to the flow is continuous with this value in the heating system.
Value indicated in Volts.
Factory setting: 7V, range: 3V – 10V
MIN FLOW CIRC. Lowest permitted voltage (speed) of the circulation pump in the heating system.
Factory setting: 3V, range: 3V – 10V
MAX H.W CHARGE
HW
Highest supply temperature during water heating.
Factory setting: 55°C, range: 45°C – 65°C
MIN CHARGE. HW Lowest desired supply temperature during water heating.
Factory setting: 50°C, range: 30°C – 65°C
8.10 BUFFER TANK
Parameter Meaning
CONFIGURATION With integral control, heating is produced according to the house's heating demand.
With tank control, a fixed value is stated for the buffer tank.
Factory setting: INTEGRAL CONTROL, range: INTEGRAL CONTROL – TANK CONTROL
RET. LINE. HP
SHUNT
When the heat pump is inactive the heat is shunted from the buffer tank to the heat pump at set temperature.
Factory setting: 25°C, range: 20°C – 30°C
SHUNT TIME RET. Indicates shortest permitted time between control signals to the return line shunt.
Factory setting: 30S, range: 10S – 99S
TANK HYST. HP Indicates the number of degrees from the desired buffer tank temperature when the heat pump must start to
heat the buffer tank.
A condition is that CONFIGURATION = TANK CONTROL.
Factory setting: 4°C, range: 2°C – 20°C
TANK HYST. IMM Indicates the number of degrees from the desired buffer tank temperature when the immersion heater must
start to heat the buffer tank.
A condition is that CONFIGURATION = TANK CONTROL.
Factory setting: 7°C, range: 2°C – 20°C
TANK HYST. EXT Indicates the number of degrees from the desired buffer tank temperature when the external auxiliary heater
must start to heat the buffer tank.
A condition is that CONFIGURATION = TANK CONTROL.
Factory setting: 10°C, range: 2°C – 20°C
Installation Guide Atec
Thermia Värmepumpar VMBQY102
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Thermia ATEC Specifications

General

Brand	Thermia
Model	ATEC
Category	Heat Pump
Language	English