16
Stop-drop in the indoor air coil and at the fresh air intake.
Note:
with hot water coil (nominal or auxiliary) it is not possible
to assemble the stop-drop.
9.4 Stop-drop
Stop-drop in the
fresh air intake
Stop-drop in the
indoor coil
Models 40ZS/ZF 420 to 600
The inlet/outlet connections of the hot water coil are located
inside the unit. The connection can be established via the unit
base using fl exible sleeves or via the side panel.
The sheet precut positions are indicated in the below drawing.
Water outlet
Water inlet
Water inlet/outlet with
fl
exible sleeves
9.3 Hot water coil
Hot water coil for mounting inside the unit, with a 3-way valve
managed by the unit’s electronic control.
Two types of water coils are availables:
- Nominal coil for heating in cooling-only units.
- Auxiliary coil for heating in heat pump units. In this case the
air inlet temperature matches the air outlet temperature of the
indoor coil.
Note:
With stop-drop in the indoor air coil it is not possible to
assemble the hot water coil
Note:
check position and dimensions of input/output of the coil
in the technical brochure of this series.
Water outlet
Water inlet
Models 40ZS/ZF 90 to 360
Recomendations:
- Coil fi lling:
• The coil fi lling must be made with the bleeder valve open
until water runs through it, which is when it is time to close it.
• Cut off the water supply and let the bubbles generated go
up to the highest coil point, which is the same as the bleeder
valve, and eliminate by opening the purger.
• Pour more water into the circuit and repeat the previous
steps.
• Activate the water pump (to be foreseen by the installer)
and repeat the previous steps until no air noises are heard
in the piping, which is when the fi lling of the installation will
have been fi nished successfully.
- In case of long unit stops, and forcibly if they happen in the
winter season, the coil must be emptied.
- Possible water freezing must be avoided: glycolling water or
by using anti-freeze thermostat that triggers the 3-way valve.
Note: this thermostat is mandatory if the unit is installed
outdoors, as well as in cases in which it uses free-cooling
and works outside at negative temperatures.
- The direction of the water fl ow must be correct and so the
following indications must be observed:
HOT WATER COIL
BATTERIE D’APPOINT
BATERÍA DE APOYO
HOT WATER COIL
BATTERIE D’APPOINT
BATERÍA DE APOYO
9 - OPTIONS