Vogt HEC-10, Service Manual

Page: 26 / 114

HEC-Series Service Manual
INSTALLING YOUR TUBE-ICE MACHINE
10/21/01
3-9
11. Condensers with multiple fans must be provided with a thermostat to turn off unneeded fans in
cold weather, per FIGURE 3-9. Turning off unneeded fans reduces on-off cycling of the fan(s)
and allows for a steadier condensing pressure.
12. When extreme cold conditions are expected or encountered (temperatures below 0
°
F and wind
greater than 15 MPH), it may be necessary to install a protective enclosure around the condenser.
A typical enclosure is shown in FIGURE 3-12. Other apparatuses such as louvers may be used.
Contact the factory for suggestions.
13. After installation, the field-installed lines are to be evacuated to a vacuum of 500 microns or less
and held for at least one hour. After the vacuum pump is removed, vacuum should hold at 500
microns or less for at least 5 minutes and the lines pressurized with R-22 to 25 psig minimum.
14. The volume of refrigerant supplied with the machine is sufficient to fill the condenser and
condenser lines when length of pipe (one way) is 75 feet or less. When the length of lines is
longer than 75 feet, additional refrigerant must be added as follows:
Liquid Line Size 75 ft. 100 ft. 125 ft. 150 ft.
1/2” none none none 2
5/8” none 2 4 6
7/8” none 4 8 12
1-1/8” none 6 12 18
Table 3-2
Pounds R-22 to Add Vs. Liquid Line Length
15. All piping must be done in accordance with applicable local and national codes. Such codes may
include “The Safety Code for Mechanical Refrigeration (ANSI B9.1), and “The Code for
Refrigerant Piping” (ANSI B31.5).
The following installation guidelines are strongly suggested. While they do not affect the machine
warranty, they may be required for safe operation, and to comply with all applicable electrical and
mechanical codes.
16. Local electrical code must be checked for wiring method.
17. The installer must provide a lockable, fused disconnect switch(s) adjacent to the condenser.
18. Electrical connections between the condenser and the Tube-Ice ® machine require minimum 12 ga.
wire.
19. All electrical fittings and components exposed to the weather must be suitable for outdoor
installation.
The design total heat rejection for each Tube-Ice
® machine, the recommended air-cooled condenser,
and condenser physical and electrical data are shown in TABLE 3-3. Only the condensers shown are
UL listed with the ice machines. Other condensers may be individually UL listed, but are not UL
listed with the Tube-Ice
® machines, and cannot be recommended by the Henry Vogt Machine Co.