Auxiliary Condensate Pan Draining Connection - Carrier IdroFan 42KY Installation, Operation And Maintenance Instructions

- Modulating valves:
There are two options:
1) If the power has not yet been switched on, the valve will be open by default.
2) If the control has already been powered up, remove the servomotor to release the rod and open the valve.
● Filling
Vent the coils during commissioning.
● Water quality recommended for water coils:
It is recommended to carry out a bacteriological analysis (detection of ferrobacteria, bacteria producing H2S and reducing
sulphates) and a chemical analysis (to avoid problems with scaling and corrosion) of the water.
- Total hardness (French scale) 10 < TH < 15
- Chloride [CL-] < 10 mg/l
- Sulphate [SO4 2-] < 30 mg/l
- Nitrate [NO3 -] = 0 mg/l
- Dissolved iron < 0.5 mg/l
- Dissolved oxygen 4 < [O2] < 9 mg/l
- Carbon dioxide [CO2] < 30 mg/l
- Resistivity 2000 < Resistivity < 5000 Ωcm
- pH 6.9 < pH < 8
● Operating limit recommendations:
- Cooling coil inlet minimum water temperature: 6°C
- Heating coil inlet maximum water temperature (2-pipe application without electrical heaters): 70°C
- Heating coil inlet maximum water temperature (2-pipe application with electrical heaters): 55°C (min. air flow rate = 200 m
- Heating coil inlet maximum water temperature (4-pipe application): 80°C
- Maximum operating pressure: 16 Bar
- Indoor return air min./max. temperature: +0°C/+40°C
- Indoor return air maximum humidity level: 27°C DB (dry bulb) at 65% RH (Relative Humidity)
- Recommended supply air temperature: < 65°C
● Operating recommendations:
To prevent any accidental opening of the thermo-actuators on control valves with thermal motors, the temperature of the air
surrounding the thermo-actuators should not exceed 50°C. This is especially important for units installed in confined spaces
(e.g. in suspended ceilings).
Carrier cannot be held responsible if the valves are damaged due to an error in the design of the hydraulic supply network or
a commissioning error.
To protect against the risk of condensation when using chilled water, lagging should be installed along the entire pipe-run and
vapour sealed at its ends. When using the water coil and electrical heater, we advise against using cross-linked polyethylene
(PEX) pipes to supply water to the unit. This is because overheating of the electrical heater could cause the water temperature
to rise briefly. This could cause the rapid deterioration of the PEX pipe near the unit and cause it to burst.
We recommend using stainless steel braided (or equivalent) hoses for hydraulic connections.

4.4. Auxiliary condensate pan draining connection

A naturally inclined ABS auxiliary condensate drain pan, with no water retention, is supplied with the unit.
To install this auxiliary pan, proceed as follows:
- Remove the bolt (Fig. 17, a)
- Tilt the auxiliary pan upwards to allow it to be clipped in place.
- Refit the bolt and tighten it (Fig. 17, b).
The condensate is drained via the drain hole in the pan (drain height 70 mm); This drain connector will accept pipes with an
internal diameter of 15 to 20 mm. Ensure that the drain connector is the lowest point on the auxiliary pan so that water does
not accumulate in the pan. The drain pipe can be separate for each device or connected to a main drain pipe sized to allow the
condensate from all the units to flow through at the same time. Use a clear flexible and/or rigid drain pipe with a minimum slope
of 1 cm/m, with a constant gradient along its whole length and no low points. Install a trap measuring at least 5 cm to prevent
unpleasant gases or odours venting from the drain.
AB A
B
EN - 6
3 /h)