Midea MC-SU30-RN1L Owners & Installation Manual page 30

8.11 Disassembling compressor
Follow the following procedures if compressor needs to be
disassembled:
1) Cut off the power supply of unit.
2) Remove power source connection wire of compressor.
3) Remove suction and discharge pipes of compressor.
4) Remove fastening screw of compressor.
5) Move the compressor.
8.12 Auxiliary electric heater
When the ambient temperature is lower than 2℃, the heating
efficiency decreases with the decline of the outdoor temperature.
In order to make the air-cooled heat pump stably run in a relatively
cold region and supplement some heat lost due to de-frosting.
When the lowest ambient temperature in the user's region in
winter is within 0℃~10℃, the user may consider to use auxiliary
electric heater. Please refer to relevant professionals for the power
of auxiliary electric heater.
8.13 System antifreezing
In case of freezing at the water-side heat exchanger interval
channel, severe damage may be caused, i.e. heat exchange may
be broken and appears leakage. This damage of frost crack is not
within the warranty scope, so attention must be paid to
antifreezing.
1) If the unit that is shutdown for standby is placed in an
environment where the outdoor temperature is lower than 0℃, the
water in the water system should be drained.
2) Water pipe may be frozen when the chilled water target flow
controller and anti-freezing temperature senor become ineffective
at running, therefore, the target flow controller must be connected
in accordance with the connection diagram.
3) Frost crack may happen to water-side heat exchanger at
maintenance when refrigerant is injected to the unit or is
discharged for repair. Pipe freezing is likely to happen any time
when the pressure of refrigerant is below 0.4Mpa. Therefore, the
water in the heat exchanger must be kept flowing or be thoroughly
discharged.
8.14 Wiring of "ON/OFF" weak electric port
First, corresponding parallel connect the "ON/OFF" port of the
main unit's electric control box,then, connect the "ON/OFF" signal
(provide by user) to the "ON/OFF" port of main unit as follows.
0# electric
control box
"ON/OFF" port
If the "ON/OFF" port is effective ,the "
controller will be flashing.
8.15 Wiring of "HEAT/COOL" weak electric port
First, corresponding parallel connect the "HEAT/COOL" port
of the main unit's electric control box,then, connect the
"ON/OFF" signal (provide by user) to the "HEAT/COOL" port
of main unit as follows.
I&O manual
26
8.17 Important information for the used
This product has the fluorinated gas, it is forbidden to release to air.
Refrigerant type: R410A; Volume of GWP: 2088;
GWP=Global Warming Potential
Attention:
Frequency of Refrigerant Leak Checks
0# electric
control box
1) For equipment that contains fluorinated greenhouse gases in
"ON/OFF" port
2) For equipment that contains fluorinated greenhouse gases in
3) For equipment that contains fluorinated greenhouse gases in
" icon of the wire
4) Non-hermetically sealed equipment charged with fluorinated
5) Only certificated person is allowed to do installation, operation
0# electric
control box
"HEAT/COOL" port
8.16 Wiring of "ALARM" port
Connect the device provided by user to the "ALARM" ports of
the module units as follows.
electric control box
"ALARM" port
If the unit is operating unnormally,the ALARM port is
closed,otherwise,the ALARM port is not closed.
refrigerant
Model
Refrigerant/kg
MC-SU30-RN1L 10.50
17.00
MC-SU60-RN1L
quantities of 5 tonnes of CO equivalent or more,but of less than
2
50 tonnes of CO equipment,at least every 12 months, or where
2
a leakage detection system is installed, at least every 24 months.
quantities of 50 tonnes of CO
2
500 tonnes of CO equipment,at least every six months, or where
2
a leakage detection system is installed, at least every 12 months.
quantities of 500 tonnes of CO
three months, or where a leakage detection system is installed,
at least every six months.
greenhouse gases shall only be sold to the end user where evidence
is provide that the installation is to be carried out by an undertaking
certified person.
and maintenance.
0# electric
control box
"HEAT/COOL" port
Factory charge
tonnes CO equivalent
2
21.94
35.50
equivalent or more,but of less than
equivalent or more,at least every
2