Carrier Idrofan 42GR ATM, Installation Instructions Manual, Page: 17 / 20

4 - COMPONENTS
4.6.3 - Procedure for replacement of the valve
bodies
CAUTION: Before any intervention on this product, it is
imperative to cut the electrical power supply of the unit.
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Close the isolating valves located on the collectors.
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Disconnect the hydraulic hoses on the ATM side by
unscrewing the G 1/2’’ rotating nuts. Drain the water from the
battery into a container.
-
Disconnect the servomotors (Fig.20b). In the case of a battery
with 4 tubes, mark the cold and hot valves.
-
Remove the 2-channel (Fig. 20c) or 3-channel (Fig.20d) water
flow regulator valve body. Depending on the adjustment of
the device, the coupling of the 3-channel valve can be
provided with a hot/ cold reverser, do not dismantle it.
-
Install a new valve body on the battery (put new seals).
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Reinstall the servomotors taking care to see that they are
correctly calamped onto the valve body.
-
Reconnect the hydraulic hoses by screwing back the G 1/2’’
rotating nuts. Tighten all the hydraulic connections again,
and ensure that all the seals have been changed and put in
place (tightening torque: 15 N.m).
-
Reconnect the quick power connector of the servomotor
(Fig.20a).
-
Open the isolating valves located on the collectors and purge
the water battery.
-
Turn on the device after having ensured that no leakage has
occurred.
-
CAUTION: During assembly of the new valve body, check
whether the direction of passage of the fluid indicated
by an arrow on the valve body is followed. In case of
assembly in the reverse direction, the valve body will be
damaged.
4.7 - Optional hydraulic hose
Be sure to observe the following radii of curvature:
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Non-insulated hose: 72 mm.
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Insulated hose: 106 mm.
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