www.ventilation-system.com
10
M
1
2
2
3
5
6
1. Water heater.
2. Shutoff valves.
3. Circulation pump.
4. Bypass damper.
5. Boiler.
6. Heat medium regulating valve
with an electric actuator.
7. Non-return valve.
8. Coarse filter.
9. Water pressure sensor (nc).
4
7
8
9
MIxING UNIT DIAGRAM
WATER HEATER CONNECTION
HEAT MEDIUM REGULATING VALVE ACTUATOR
water inlet
Water outlet
Water outlet
water inlet
Direct flow connection
Counterflow connection
Mixing unit diagram (not included in the delivery set) of the water heater is shown in the following figure.
WARNING!
The unit operates either in Winter or Summer mode. If the outside air temperature is below +10 °C the Winter mode is activated. If the
outside temperature a10 °C the unit operates in Summer mode.
In Summer mode the unit operates regardless of the return heat medium temperature in the mixing unit.
In Winter mode the unit has following temperature limits:
•
The unit may not be started when the return heat medium temperature is below +40 °C. If the return heat medium temperature is +40 °C
and higher the unit will be turned on with a 90 seconds delay.
•
The unit turns off when the return heat medium temperature falls below +20 °C.
Safety precautions:
The unit must be mounted to a rigid and stable structure.
The unit must be suspended using threaded rods. Before starting mounting check that the mounting structure has sufficient loading capacity
for the unit weight. Otherwise reinforce the mounting location with beams or similar elements.
If the threaded rods used for the unit mounting are too short, the unit can generate abnormal noise resulting from resonance with the ceiling.
Use threaded rods of sufficient length to prevent resonance.
If the abnormal noise is generated at the spiral air duct joint replace the spiral air duct with a flexible one to prevent resonance. Flexible anti-
vibration connectors are another alternative for dealing with resonance.
