VOGT ICE TUBE-ICE P-24A Service Manual page 40

3-12
INSTALLING YOUR TUBE-ICE MACHINE
Condenser water flow is based on pulldown of 30°F SST and 105°F SDT. Condenser water
pressure drop does not include water regulating valve. Consult factory for sizing if desired.
The following table show the model of Marley cooling tower required for operating at various wet
bulbs to cool 91°F (33°C) entering water to 85°F (29.4°C) exiting water.
Model GPM
P24A 195
P34A 375/400*
* Note: P34A with a condenser containing carbon steel tubes, require 375gpm water flow. P34A with a
condenser containing stainless steel tubes, require 400gpm water flow.
Tower nozzles will be selected based on GPM required for condenser.
The condenser water pump should be sized on GPM required for condenser at 80 ft. total discharge
head for a typical installation. However, due to cooling tower location and pressure drop through
water lines, the water pump should be sized for each installation.
The ice machine is supplied with a fan control switch for cycling the cooling tower fan on and off,
thereby maintaining the proper operating head pressure. If the condenser inlet water temperature is
expected to be below 75°F/24°C, a water regulating valve should be installed in the condenser water
inlet line and adjusted to maintain a head pressure of not less than 175 psig.
See FIGURES 3-5 through 3-8 for possible cold climate installations with indoor sump.
Safety Valves. Four safety pressure relief valves are an integral part of the packaged Tube-Ice
machine. Two are located in the low side of the system on the freezer, and two are in the high side
of the system on the receiver. Vent each of the pressure relief valves to the atmosphere in such a
manner as to comply with local and national codes. Refer to the International Institute of Ammonia
Refrigeration (IIAR) standard for specific requirements and instructions.
12/20/12
P24A Condenser Water
Entering Flow Cond.
Water GPM
196
85°F
131
80°F
98
75°F
79
70°F
66
65°F
56
60°F
49
55°F
44
50°F
Total Heat Rejection
THR = 981,300 BTUH
Condenser Water Requirements
Cond. PD
PSIG
14
13
Marley Cooling Tower Recommendations
P34A Condenser Water
Entering
PSID Water
14
85°F
6
80°F
3
75°F
2
70°F
2
65°F
1
60°F
1
55°F
1
50°F
THR = 1,852,500 BTUH
TABLE 3-2
75° ° ° ° F 76° ° ° ° F 77° ° ° ° F
494G 494G 494G
496K 496K 496K
TABLE 3-3
P24A & P34A Service Manual
Flow Cond.
GPM PSID
371 12
241 5
185 3
148 2
124 1
106 1
93 1
82 1
Total Heat Rejection
78° ° ° ° F 79° ° ° ° F
494G 494G
496K (2) 495K
80° ° ° ° F
494G
(2) 496K
®