Test Running - Bosch MDCI8-1 Installation Manual

12 | TEST RUNNING

Table 5-3
SW3 (SW-1)
ON Obtain network address automatically
1
OFF Obtain network address manually
ON Delete indoor unit network address
2
OFF /
•
12–16: SW4/SW7 definition: Auto addressing dial
Single-Phase
ON
1 2 3
SW4
Table 5-4
SW4
SW7
ON Obtain network address automatically
1
OFF Obtain network address manually
ON Delete indoor unit network address
2
OFF /
6. TEST RUNNING
CAUTION
• Ensure power to the outdoor unit has been turned on for at least
12 hours prior to start up.
• Ensure isolation valves have been opened prior to running the
unit.
7. PRECAUTIONS ON REFRIGERANT
LEAKAGE
This air conditioning unit uses R410a as a refrigerant which is non
flammable. The room for the air conditioning unit should big enough so that
any refrigerant leakage is unable to reach critical thickness.
•
Critical thickness------maximum exposure of refrigerant without any
harm to person.
•
Refrigerant critical thickness: 0.44 [kg/m
Confirm the critical thickness using the following steps, and take necessary
actions.
1 Calculate the sum of the charge volume (A[kg]) Total Refrigerant
volume of 10HP=factory refrigerant volume + superaddition
2 Calculate the indoor cubage (B[m ]) (as the minimum cubage.
6 720 874 421 (2017/04) ZA
Three-Phase
ON
1 2
SW7
Single-Phase
Three-Phase
] for R410A.
3
Calculate the refrigerant thickness
A[kg]
≤ critical thickness
B[m ]
3
Counter measure against over high thickness
1 Install a mechanical ventilator to reduce the refrigerant thickness
under a critical level. (ventilate regularly)
2 Install leak alarm facility related to a mechanical ventilator if you can
not regularly ventilate.
Outdoor unit
Indoor unit
Room full of leak refrigerant
(All refrigerant has run up)
b. Leak alarm related to mechanical ventilator
Indoor unit
A. Ventilation
Fig. 7-1
Mini VRF Heat Pump Outdoor Unit