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PKGP-SVX03D-EN
Pre-Start-up
System position setup
System bit is a byte of memory. It can be set through a wire controller (to input "as password).
Each bit is defined as below:
Auto: (135)
0 Power-on manual start (default)
1 Power-on auto start (in the event of power failure)
Defrost: (136)
0 "Manual defrost" in vain (default)
1 "Manual defrost" in force
Flow: (133)
0 "Water switch mode" in vain (default)
1 "Water switch mode" in force (to give an alarm in 30S upon stop of water pump if switch is in
closure)
Ambient: (139)
0 Ambient thermo probe in vain (default)
1 Ambient thermo probe in force
Operating parameter setting
The protection and operation parameters of the water chiller can be set through the controller in a
shutdown state. Default parameters are set as below:
Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1
Temp Flow void Ambient Mode Defrost Pulse Auto
Parameter setup Maximum value Minimum value
Regulation
precision
Factory setting
Refrigerating return water temperature 25
℃
10
℃
1
℃
12
℃
Heating return water temperature 50
℃
25
℃
1
℃
40
℃
Winter antifreezing temperature 5
℃
1
℃
1
℃
3
℃
Defrost interval 90min 30min 1min 45min
Minimum running time of defrost 8min 1min 1min 1min
NOTICE:
a. It is recommended that refrigerating return water temperature be kept as factory setting;
otherwise low temperature setting may lead to low outlet water temperature and cause an
antifreezing alarm.
b. In case actual water flow is less than 70% of rated flow, refrigerating return water
temperature setting shall be at least , otherwise the addition of antifreezing agent into
water system is necessary (volume concentration of ethylene glycol in the water system is
not lower than 15%).
c. To prevent antifreezing alarm at low refrigerating return water temperature setting, please
increase the addition of antifreezing agent or use a large flow water pump in the water
system. Please consult Trane after-sales service personnel to modify the antifreezing setting.
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