MAXA i-32V5C MIDI 0121 - Unit and Auxiliary Electrical Data; Operating Limits; Evaporator Water Flow Rate; Cold Water Production (Summer Mode)

i-32V5 MIDI Chillers and Inverter Air/Water heat pumps with axial fan
36

(1) Cooling: outdoor air temperature 35°C; in/out water temperature 12/7°C.
(2) Cooling: outdoor air temperature 35°C; in/out water temperature 23/18°C.
(3) Heang: outdoor air temperature temperatura aria esterna 7°C b.s. 6°C b.u.; in/out water temperature 30/35°C.
(4) Heang: outdoor air temperature 7°C b.s. 6°C b.u.; in/out water temperature 40/45°C.
(5) Cooling: in/out water temperature 7/12°C.
(6) Heang: medium cliac condions; Tbiv=-7°C; in/ out water temperature 30/35°C.
(7) Indicave data subject to changes. For the correct value, always refer to the technical label on the unit.
(8) Calculated for a decrease in system water temperature of 10°C with a defrost cycle lasng 6 minutes.
(9) Sound power: condion (3); value determined on the basis of measurements made in accordance with UNI EN ISO 9614-2, in compilance with
the requirements of Eurovent cercaon.
(*) acvang the maximum Hz funcon
-

UNIT AND AUXILIARY ELECTRICAL DATA
Unit power supply V/~/Hz 400/3PH+PE/50
On board controller circuit V/~/Hz 12/1/50
Remote controller circuit V/~/Hz 12/1/50
Fans power supply V/~/Hz 400/3PH+PE/50

applied on the right side panel of the unit.
13. OPERATING LIMITS
EVAPORATOR WATER FLOW RATE
he nominal water ow rate refers to a 5°C temperature dierence between the evaporator inlet and outlet. The maximum permied ow rate
features a 3°C temperature dierence while the minimum one has an 8°C temperature dierence at the nominal condions as shown in the
technical sheet.



For greater details, we have aached a table below with the minimum ow rates for the plate heat exchanger to guarantee proper operaon
according to the model (please note: the water ow switch is applied to protect against failed triggering of the anfreeze probe due to the lack
of ow but does not guarantee the minimum water ow rate required for correct operaon of the unit).
Model
i-32V5C i-32V5H
0121 0126  0132 0121 0126  0132
Minimum water ow to be assured in
chiller mode (condion (1) technical
sheet) [l/s]
0,618 0,773 0,839 0,950 0,529 0,558 0,723 0,776
Maximum water ow to be assured
in chiller mode (condion (1) techni-
cal sheet) [l/s]
1,65 2,06 2,24 2,53 1,41 1,49 1,93 2,07
Minimum ow switch water ow
rate* [l/s]
0,445 0,445 0,528 0,528 0,445 0,445 0,528 0,528
Maximum ow switch water ow
rate* [l/s]
0,477 0,477 0,588 0,588 0,477 0,477 0,588 0,588
* When the ow rate drops below the indicated limit (ow switch minimum water ow rate) the ow switch issues an alarm, which may be reset
only upon reaching the maximum indicated ow rate.

A minimum temperature of 5°C is allowed at the evaporator outlet for standard units. For BT units (low temperature) minimum temperature is
-8°C. In this case glycol water must be used. A maximum temperature of 22°C can be maintained at the evaporator outlet in steady-state oper-
aon.

When the system has reached steady state, the water inlet temperature must not drop below 25°C: lower values, not due to transient phases
or reaching steady-state, can cause system failures and could possibly break the compressor. The maximum outlet water temperature must not
exceed 60°C.
There could be failures to the regular operaon of the unit or, in more crical cases, the safety devices could be triggered due to temperatures
higher than those indicated, especially if coupled with reduced water ow rates.