11.13 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.
11.14 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.
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.
0# electric
control box
“ON/OFF” port
ON
Power (DC 12V)
Main control board is provided
0# electric
control box
“HEAT/COOL” port
COOL
Power (DC 12V)
Main control board is provided
11.15 Wiring of “HEAT/COOL” weak electric port
0# electric
control box
“ON/OFF” port
OFF
Power (DC 12V)
Main control board is provided
0# electric
control box
“HEAT/COOL” port
HEAT
Power (DC 12V)
Main control board is provided
Connect the device provided by user to the “ALARM” ports of
the module units as follows.
If the unit is operating unnormally,the ALARM port is
closed,otherwise,the ALARM port is not closed.
11.16 Wiring of “ALARM” port
electric control box
“ALARM” port
Device provided
by user
11.17 Important information for the used
refrigerant
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
1) For equipment that contains fluorinated greenhouse gases in
quantities of 5 tonnes of CO
2
equivalent or more,but of less than
50 tonnes of CO
2
equipment,at least every 12 months, or where
a leakage detection system is installed, at least every 24 months.
2) For equipment that contains fluorinated greenhouse gases in
quantities of 50 tonnes of CO
2
equivalent or more,but of less than
500 tonnes of CO
2
equipment,at least every six months, or where
a leakage detection system is installed, at least every 12 months.
3) For equipment that contains fluorinated greenhouse gases in
quantities of 500 tonnes of CO
2
equivalent or more,at least every
three months, or where a leakage detection system is installed,
at least every six months.
4) Non-hermetically sealed equipment charged with fluorinated
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.
5) Only certificated person is allowed to do installation, operation
and maintenance.
Model
Refrigerant/kg
tonnes CO2 equivalent
10.50
17.00
27.00
21.94
35.50
56.36
Factory charge
ECH030N
ECH060N
ECH090N
If the “ON/OFF” port is effective ,the “ ” icon of the wire
controller will be flashing.
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