14
INSTALLATION AND OPERATION MANUAL
3 SYSTEM DESCRIPTION
Maximum Allowable Pressure and High Pressure Cut-out Value:
Product Series Outdoor Unit Model Refrigerant
Maximun
Allowable
Pressure (MPa)
High Pressure
Switch Cut-out Value
(MPa)
H(V)RNM(1)E Series
HVRNS1E Series
RAS-3~6H(V)RNM(1)E
RAS-4~6HVRNS1E
R410A
R410A
4.15
4.15
4.00 ~ 4.10
4.00 ~ 4.10
CAUTION:
Supply electrical power to the system for approximately
12 hours before start-up or a long shutdown. Do not start
the system immediately after power supply, it may cause a
compressor failure because the compressor is not heated
well.
When the system is started after a shutdown longer that
approximately 3 months, it is recommended to check the system
by your service contractor.
Turn OFF the main switch when the system is to be stopped
for a long period of time: If the main switch is not turned OFF,
electricity will be used, because the oil heater is always energised
during compressor stopping.
Make sure that the outdoor unit is not covered with snow or ice.
If covered, remove it by using hot water (approximately 50°C). If
the water temperature is higher that 50 °C, it will cause damage
to plastic parts.
Start-up and Operation: Check to ensure that all the stop valves are
fully opened and no obstacle exists at the inlet/outlet sides before start-
up and during the operation.
Maintenance: Periodically check the high pressure side pressure. If
the pressure is higher than the maximum allowable pressure, stop the
system and clean the heat exchanger or remove the cause.
NOTE:
The label for the vessel under PED are attached on the high
pressure vessel. The pressure vessel capacity and vessel
category are indicated on the vessel.
Location of High Pressure Switch
Compressor
NOTE:
The high pressure switch is indicated on the electrical wiring
diagram in the outdoor unit as PSH connected to printed circuit
board (PCB1) in the outdoor unit
Structure of High Pressure Switch
Contact Point Pressure Detected
Connected to the electrical wire
DANGER:
Do not change the high-pressure switch locally or change the
high pressure cut-out set value locally. If changed, it will cause
serious injury or death due to explosion.
Do not attempt to turn service valve rod beyond its stop
Long piping for high-rise buildings.
Various combinations, 7 types and 40 models of indoor units type capacity from 1.5 HP to 6 HP.
Flexibility of indoor unit control.
High reliability.
Space saving.
Easy installation.
(m)
Unit Power
H(V)RNM1E HVRNS1E
3HP 4HP 5/6HP 4/5/6HP
Maximum Piping Lenght Lo-i:
Actual Length 50 70 75 50
Equivalent Length 70 90 95 70
Maximum Piping Length Ho-i:
Outdoor Unit is higher than Indoor Unit 30 30 30 30
Indoor Unit is higher than Outdoor Unit 20 20 20 20
Maximum Piping Lift Hi-i 3.0 3.0 3.0 0.5
4 BEFORE OPERATION
PMML0197_r0_04-10.indb 14 08/07/2010 9:20:09
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