Test Run - Bosch CLIMATE 5000 VRF RDCI Series Installation Manual

9. TEST RUN

9.1 Inspection and confirmation before
commissioning
Check and confirm that refrigeration pipework and communication
■
wires on the indoor and outdoor units have been connected to the
correct refrigeration system.
Power voltage is within ±10% of rated voltage.
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Before powering on, confirm there is no short circuit on each wire.
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Ensure new installations have passed a nitrogen strength test.
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Confirm the vacuum process has been carried out.
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9.2 Preparation
Calculate the amount of refrigerant charge needed using table 5-12.
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Have the system plan, system pipework diagram and control wiring
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diagram to hand.
Record the setting address codes on the system plan.
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Ensure the power to the compressors has been on for a minimum of
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12 hours before starting the system.
Check whether the power phase sequence of outdoor unit is correct.
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Ensure all dial switches on the indoor and outdoor units have been
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set with accordance to the installation manual.
9.3 Fill the name of connected system
To clearly identify the connected systems between two or more indoor units
and outdoor units, select names for every system and record them on the
nameplate on the outdoor electric control box cover.
Model(indoor unit)
Room Name
Eg: Indoor unit (A) of the first
system on second floor is
recorded as:-2F-1A
RDCI Series – All DC Inverter Outdoor Units
9.4 Caution on refrigerant leakage
This air conditioning unit uses R410a which is a non flammable
■
refrigerant.
The room for the air conditioning unit should be big enough to
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ensure that a refrigerant leakage cannot reach a critical thickness.
Critical thickness-----the maximum exposure of refrigerant without
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any harm to person. R410A critical thickness: 0.3 [kg/m
Calculate the critical thickness using the following steps, and take
■
necessary actions.
•
Calculate the sum of the charge volume (A[kg]).
Total refrigerant volume=refrigerant volume when delivered
(nameplate)+superaddition
•
Calculate the indoor cubage (B[m
• Calculate the refrigerant thickness.
A [kg]
B [m ]
3
Countermeasure against overhigh thickness
■
•
Install mechanical ventilator to reduce the refrigerant thickness
under critical level. (ventilate regularly)
• Install leakage detector alarming device related to mechanical
ventilator if you can not regularly ventilate.
b. Leakage detector alarming device
related to mechanical ventilator
Fig. 9-1
OA
Outdoor unit
Indoor unit
Room full of leaking refrigerant
(All the refrigerant has leaked)
]) (as the minimum cubage)
3
≤
Critical thickness: 0.3 [kg/m 3 ]
Indoor unit
a. Ventilation peristome
6 720 862 437 (2016/10)
TEST RUN | 21
].
3
Fig. 9-2
Fig. 9-3