6
Manometer in the refrigeration circuit
MHP
Ø
High-pressure manometer:
The manometer shows the pressure on the high-pressure side within the refrigeration circuit. The display is l ocat-
ed on the connection side, above the cooling medium connections.
MLP
Ø
Low-pressure manometer
The manometer shows the pressure on the low-pressure side within the refrigeration circuit. The display is locat-
ed on the connection side, above the cooling medium connections.
PV
Ø
Pressostatic fan control
The condensation pressure is controlled by pressostatic activation and deactivation of the fans. This type of control
allows adaptation to different operating conditions at constant condensation temperatures.
R
Ø
Crank case heating
The electrical crank case heating is activated after the main switch has been turned on. It protects against a refrig-
erant accumulating in the compressor. This avoids faults during the compressor start-up phase at low ambient
temperatures.
V
Ø
Ventilator (fan)
Axial: Low-noise axial ventilator (maintenance-free).
Radial: Low-maintenance radial ventilator for connection to an air duct on the customer
½
s premises.
Injection process
a. Capillary injection (up to cooling capacities of approx. 2.5 kW).
The refrigerant is injected via a defined capillary.
b.
VE
“
Expansion valve (from cooling capacities of approx. 2.5 kW)
Thermostatic valve that limits the evaporation pressure to a maximum.
(MOP; maximum operating pressure).
Piping (cooling system)
Closed pipe system made of copper tubing, including fittings. Supplied as required with additional fittings such as
non-return valves, filter drier, sight glass and service connections.
3.2.2
OPTIONS
Ø
REFRIGERATION CIRCUIT
Condenser air filter, aluminium (reusable)
The condenser air filter protects the condenser against dirt. It is easy to clean and can be reused over a long period
of time.
IAF
Ø
Air filter monitoring
Heavy contamination of the air filter is indicated by an acoustic warning signal visible on the controller, which is
triggered by the pressostat.
Variable fan speed control
The condensation pressure is kept at a constant level by fans with a speed control and is particularly suitable for
use at extremely low ambient temperatures.
Hot gas bypass regulating device
The bypass pipe with solenoid valve and throttle device is used when there are exact requirements on the constan-
cy of the cooling medium outlet temperature or when there are high load fluctuations.
Water-cooled condenser
(instead of air-cooled condenser)
This consists of a plate heat exchanger or a shell tube heat exchanger that uses existing cooling water to condense
the refrigerant. It replaces the finned pack heat condenser and the fan.
This cools and recondenses the refrigerant. The cooling water requirement can be adjusted according to the con-
densation pressure with a pressostatic control valve.
3.3
COOLING MEDIUM CIRCUIT (CONSUMER CIRCUIT)
3.3.1
STANDARD COMPONENTS USED IN THE CHILLER
MF
Ø
Manometer for the cooling medium
In chillers with an integrated pump, the manometer indicates the pressure at the cooling medium outlet. In chillers
with no integrated pump, the manometer indicates the pressure at the cooling medium inlet.
P
Ø
Pump
A single-stage or multi-stage centrifugal pump of horizontal or vertical design is used according to the type of mo d-
el.
Summary of Contents for PCGE Series
Page 69: ...69 11 2 WIRING DIAGRAM MODELS PCGE 11 to PCGE 25 PCGEZ 08 230V 1Ph 50Hz POWER COMMAND DIAGRAM...
Page 70: ...70 MODEL PCGE 28 230V 1Ph 50Hz POWER COMMAND DIAGRAM...
Page 71: ...71 MODEL PCGE 28 400V 3Ph 50Hz POWER COMMAND DIAGRAM...
Page 72: ...72 MODELS PCGE 31 to PCGE 41 OCGE 31 to OCGE 41 230V 1Ph 50Hz POWER SECTION...
Page 73: ...73 MODELS PCGE 31 to PCGE 41 OCGE 31 to OCGE 41 230V 1Ph 50Hz COMMAND SECTION...
Page 78: ...78 MODELS PCGE 590 to PCGE 3300 PCGEZ 360 to PCGEZ 480 400V 3Ph 50Hz...
Page 79: ...79...
Page 80: ...80...
Page 81: ...81...
Page 86: ...86 MODEL PCGE 1100 with tank and pump MODEL PCGE 1300 with tank and pump...
Page 87: ...87 MODEL PCGE 1900 2200 with tank and pump MODEL PCGE 2900 3300 with tank and pump...
Page 89: ...89 MODELS PCGE 370 to PCGE 520 PCGEZ 180 to PCGEZ 300 without tank MODEL PCGE 590 without tank...
Page 91: ...91 MODEL PCGE 1100 without tank MODEL PCGE 1300 without tank...
Page 92: ...92 MODEL PCGE 1900 2200 without tank MODEL PCGE 2900 3300 without tank...
Page 97: ...97 710 1789 00 00 02B 07 05 2008...
Page 166: ...69 11 2 WIRING DIAGRAM MODELS PCGE 11 to PCGE 25 PCGEZ 08 230V 1Ph 50Hz POWER COMMAND DIAGRAM...
Page 167: ...70 MODEL PCGE 28 230V 1Ph 50Hz POWER COMMAND DIAGRAM...
Page 168: ...71 MODEL PCGE 28 400V 3Ph 50Hz POWER COMMAND DIAGRAM...
Page 169: ...72 MODELS PCGE 31 to PCGE 41 OCGE 31 to OCGE 41 230V 1Ph 50Hz POWER SECTION...
Page 170: ...73 MODELS PCGE 31 to PCGE 41 OCGE 31 to OCGE 41 230V 1Ph 50Hz COMMAND SECTION...
Page 175: ...78 MODELS PCGE 590 to PCGE 3300 PCGEZ 360 to PCGEZ 480 400V 3Ph 50Hz...
Page 176: ...79...
Page 177: ...80...
Page 178: ...81...
Page 183: ...86 MODEL PCGE 1100 with tank and pump MODEL PCGE 1300 with tank and pump...
Page 184: ...87 MODEL PCGE 1900 2200 with tank and pump MODEL PCGE 2900 3300 with tank and pump...
Page 186: ...89 MODELS PCGE 370 to PCGE 520 PCGEZ 180 to PCGEZ 300 without tank MODEL PCGE 590 without tank...
Page 188: ...91 MODEL PCGE 1100 without tank MODEL PCGE 1300 without tank...
Page 189: ...92 MODEL PCGE 1900 2200 without tank MODEL PCGE 2900 3300 without tank...
Page 194: ...97 710 1789 00 00 02B 07 05 2008...
