Thermo-Electric Control Valve - Carrier 42WHC016 Installation Manual

42 WHC/WHE
Unit installation
Hanging panel with water valve
Hanging panel without water valve
ATTENTION:
Before hanging the unit, position the chain by hooking it into
the hole provided.
Hook the unit onto the hanging panel.
Make sure the unit fits on the panel.
Tighten down screw on the panel to ensure safety.
If necessary, release the unit and reverse the procedure.

Thermo-electric control valve

OUT
GB - 14
IN
Thermo-electric
valve head
OUT
Valve body
Pour water into the unit condensate pan and check that it flows
freely to the drain.
Air venting
The upper coil coupling has an air vent and drain valve, adjustable
with 8 and 12 mm spanners.
Air must be vented from the hydraulic circuit. To perform this
operation it is sufficient to use the valve on the coil.
This operation must be performed with the unit hanging on the
panel in a vertical position.
Draining
If the unit has to be removed, the water in the coil can be drained in
the following way:
• Un-hook the unit and position it in a horizontal position using the
chain and hooks;
• close the shut-off valves situated before the valve;
• to drain, open the air vent valve on the coil;
• slowly slacken the connection between the pipe and the coil pipe.
This operation permits partial coil draining; in any case, the quantity
of drained water is sufficient to guarantee removal of the unit
without any further water losses, when disconnecting the
connections between the flexible pipes and unit pipes.
Before removing the unit, we recommend closing the two unit pipes
with plugs to prevent the small amount of water left running out of
the coil.
Thermo-electric valve operation
• This 3-way valve is of the ON/OFF type with very slow
movement.
It is not a modulation valve. This valve is controlled by the control
installed in the same room as the unit.
• The thermo-electric valve is normally closed towards the coil
and open towards the bypass route.
The valve opens in around 3 minutes circulating the water in the
coil.
• When the desired room temperature is reached, the valve
closes in around 3 minutes towards the coil and opens towards
the bypass.
The valve is factory-connected and no connection is therefore
needed.
Spanner 8 mm
Spanner 12 mm