Hanbell RC2-100A - Page 12

Technical Manual VERSION 2.0 -10-18-2018
12
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Figure 14 Stepless capacity control
Note: 1. In continuous (stepless) capacity control system, Hanbell
installs two normally closed solenoid valves as standard
accessory. If it is necessary to be equipped with other type of
solenoid valves, please specify it when placing orders.
2. If customers prefer to remove unloading orifice or equip with
loading orifice for system application, please specify it when
placing orders
3. Normally opened solenoid valve SV2 (for loading) is an option.
Capacity Modulation
NC
SV2 (S
tandard)
NO
SV2 (O
ption)
a.
Loading
Standard: When NC SV2 is
energized but NC SV1 is not
energized, oil will be injected
continuously into piston cylinder
and will not bypass through NC
SV1 so compressor keeps
loading.
Option: When both NO SV2 and
NC SV1 are not energized, oil
will be injected continuously into
piston cylinder and will not
bypass through NC SV1 so
compressor keeps loading.
SV1 (N.C. / OFF)
LOADING
SV2
(N.C. / ON; Oil bypasses)
SV1 (N.C. / OFF)
LOADING
SV2
(N.O. / OFF; Oil bypasses)
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b.
Unl
oading
Standard: When NC SV1 is
energized but NC SV2 is not
energized, oil inside piston
cylinder will bypass to suction
port through NC SV1.
Option: When both NO SV2 and
NC SV1 are energized, oil inside
piston cylinder will bypass to
suction port through NC SV1.
SV1
SV2
UNLOADING
(N.C. / ON; Oil bypasses)
(N.C. / OFF; Oil injecion stops)
SV1
(N.C. / ON; Oil bypasses)
SV2
(N.O. / ON; Oil injecion stops)
UNLOADING
No. Component No. Component No. Component
1 Suction filter 7 Discharge bearings 13 Capillary
2
Gas in（low
pressure）
8
Oil separator baffle 14 Solenoid valve, SV2
3 Motor 9
Gas out（high pressure
with oil）
15 Solenoid valve, SV1
4 Oil filter cartridge 10 Lubricant 16 Orifice
5 Suction bearings 11 Oil separator cartridge 17 Slide valve
6 Male rotor 12
Gas out (high pressure
without oil)
SV1(NC)
Standard
SV2(NC)
Standard
SV2(N0)
Option
Start energized not energized energized
Loading not energized energized not energized
Unloading energized not energized energized
Stable not energized not energized energized
NC./ON;
Oil injection
NO./OFF;
Oil injection