Vogt Tube-Ice HFO10, Service Manual

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9-4
Water-Regulating Valve (Water-Cooled Machines)
A water-regulating valve located in the condenser water inlet controls the water flow through the condenser.
This valve should be adjusted to maintain a head pressure of 130
– 140 psig (9 – 9.7 bar) for R513A. Increasing the
water flow will lower the head pressure, while decreasing the water flow will raise the head pressure. The valve
is set at the factory during testing. The valve stem should not be opened all the way because it will not close
completely when the head pressure drops below its setting.
Figure 31: Water Regulating Valve
Cleaning Water-Cooled Condenser
The shell and tube condenser require occasional cleaning to maintain peak performance.
Compressor Motor Protection
The Bitzer Compact screw compressor motor is protected by an electronic motor protection module. If this
module fails, it must be replaced. Two different modules are used, depending on how the compressor is
powered:
•
If the machine does not have a variable frequency drive, motor protection is provided by the Bitzer
SE-E1 module. (Vogt part number 12A2110P0505)
•
If the machine is equipped with a variable frequency drive, the motor protection is provided by the
Bitzer SE-E2 module. (Vogt part number 12A2110P0504)
Table 10: Compressor Parts
Item Vogt Part No. Description
Oil Level Control 12A2110P0507 Optical Oil Level Control, 230V Control Power
Unloader Coil 12A2110P0508 Coil, Unloader, 230V, 8W
Crankcase Heater -
230v
12A7509E25 Crankcase Heater, 230V, 200W, for CSH65/75
Electronic Motor
Protection Mod-STD
12A2110P0505
INT SE-E1 Module for Compact Screw with no VFD,
115/230V
Screw Compressor 12A2110Z052 Compressor, Screw, 35HP
Adjusting Stem
(CW Lowers Setting)
Connected To
Condenser