General Guidelines; Heat Supply - Danfoss Ally Application Manual

Application Guide

2. General Guidelines

2.1 Heat supply

If the heating system has been optimized for constant set temperature around the clock, you
may need to adjust the settings when working with setback periods. When changing the
temperature from a low economy setting to a comfort temperature, the system must be able to
supply enough heat to raise the room temperature at least 1 °C per hour to perform well. Com-
pared to a steady temperature the heating system must typically be able to supply 25% more
heat, but only for a short period of time during heat up.
How to achieve 25% extra capacity in a system that should run boost:
Limitations
Max. P and temperature reached:
Max. temperature and preset reached:
Max. preset and P reached:
NOTE: Maximum acceptable presetting, water temperature and pump di erential pressure settings are di erent
from system to system and depend on the application.
For radiator valves with pre-setting, balance
the system to allow for enough ow.
The supply line temperature at the radiator
valves should be above 40 °C to ensure
optimal control.
Make sure that the supply water temperature
and ow is adequate to provide enough energy.
Increase the temperature or the pump level,
if necessary.
6 | © Danfoss | FEC | 2023.12
Heating Control Danfoss Ally™
BOOST
ENERGY
ECONOMY COMFORT
Action
Increase valve presetting
Increase pump pressure
Increase water temperature
min.
40 °C
AB440847594423en-000103