Hitachi RAC-112SQB, Руководство по установке

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3-3 Pipe Length DIP Switch (DSW) Settings
Adjust DSW2 settings as shown below when the refrigerant pipe is under 5m or over 30m.
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3-4 Refrigerant Filling Level
(1) Refrigerant filling level and standard pipe length at shipping by model
Refrigerant filling level
(kg)
Standard pipe length
(m): l
z Tolerance of refrigerant filling level: ±0.1kg.
z Over- or under-filling of refrigerant will cause
anomalies or compressor fault. Fill in exact
level of refrigerant only.
z Make sure R410A refrigerant is in liquid
form before filling.
112SQB 3.2
30
125/140/160SQB 3.4
Calculate the additional pipe length before filling in additional
refrigerant to ensure the required quantity of refrigerant. Calculate the
required quantity of refrigerant as shown below and 3-2 Guidelines for
Additional Refrigerant Filling.
(2) Calculation of additional refrigerant filling
Pipe length L(m) calculation
a) L(m)<30m: No need of additional refrigerant.
b) L(m)>30m: Add refrigerant.
Calculate the required quantity of refrigerant as shown
below:
W (additional refrigerant) = ( L-l) x P
L: Pipe length
l: Standard pipe length (30m)
P: Compensational value (60g/m).
(Example)
L=34m
L-l =34-30=4m
Additional quantity of refrigerant
W=( L-l) x P=4m x 60 g/m =240g
(3) Fill in the additional quantity of refrigerant (W) calculated in (2).
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3-5 Recovering Refrigerant
Follow the steps below to recover refrigerant from the outdoor unit before
relocating the indoor and/or outdoor unit(s).
1) Connect the manifold gauge set with the gas interceptor valve and
liquid interceptor valve.
2) Turn on the A/C power.
3) Set DSW1-1 on the outdoor unit to ON (unit operation starts). Close
the liquid interceptor valve. Start refrigerant recovery.
4) When the low pressure (gas interceptor valve) is -0.01MPaG
(-75mmHg), quickly run the following actions:
1. Close the gas interceptor valve.
2. Set DSW1-1 to OFF (unit operation stops).
5) Shut down the power.
Caution: Make sure pressure is not below -0.01MPaG.
Pressure below -0.01MPaG will cause compressor damage.
DSW2 (pipe length and auxiliary function setup)
Change settings when the refrigerant pipe is under 5m or over 30m
Factory Settings
Pipe is under 5m Pipe is over 30m
Set DSW1-1 to
ON.
Gas interceptor valve
Liquid interceptor valve
Manifold
gauge set