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The following is a "Quick Step Guide" to expedite four (4)
always
adjustments
need to be done at time of startup. When done properly, these adjustments will insure proper
operation of this equipment and minimize costly call backs and optimize equipment up-time.
Refrigerant
R-407A
R-448A
R-449A
Suction temperature should be adjusted with use of an Evaporator Pressure Regulator (EPR).
Models 51 - 101 Howe Flakers have an optimum suction temperature setting of -30°F. This optimum suction
temperature setting is to be checked and maintained at the flaker evaporator suction connection. They can
vary slightly due to the effects of water temperatures, water hardness, ambient air temperatures and ice quality
requirements.
Howe Flake Ice Equipment's Thermal Expansion Valve (TXV) must be adjusted visually (by sight) to assure
ice quality and ice harvesting. Superheat settings are not a reliable method of adjusting
optimum
TXV on Howe Flaker. Please note how ice appears in photo above for a properly adjusted TXV. An
even layer of ice should form completely from top to bottom on the evaporator. If ice on the lower 1"
to 4" of the evaporator looks different than the ice above it, this normally indicates the TXV is
underfeeding and requires opening. Failure to make proper TXV adjustments may cause
unwanted ice build-ups on the evaporator. Ice build-ups can lead to the destruction of critical
components as well as the ice flaker if left operating incorrectly.
Models 76 and 101 ice flakers have two (2) TXV's. If underfeeding condition referenced in the
paragraph above exists on these "double circuit model units", it is necessary to use two (2)
separate refrigeration gauges to balance the TXV's at the same identical pressure setting.
When one circuit appears to be underfeeding more than the other, it is necessary to open the TXV for
Howe Corporation-Service Department 773-235-0200 service@howecorp.com
Large Capacity Flaker (Seawater)
Start & Adjust "Quick Step Guide"
Model #
51-101
51-101
51-101
Evaporator Pressure Regulator Adjustment
Thermal Expansion Valve Adjustment
QUALITY REFRIGERATION EQUIPMENT SINCE 1912
critical adjustments
of the new Howe Ice Flaker. The
Pressure Setting
Temperature Setting
3.3 psig
4.2 psig
4.4 psig
-30°F
-30°F
-30°F
1
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Table of Contents
Related Manuals for Howe R-407A
Summary of Contents for Howe R-407A
- Page 1 Superheat settings are not a reliable method of adjusting optimum TXV on Howe Flaker. Please note how ice appears in photo above for a properly adjusted TXV. An even layer of ice should form completely from top to bottom on the evaporator. If ice on the lower 1”...
- Page 2 _______________________________________________________________________________ HEAT EXCHANGER INSTALLATION Howe Corporation will ship a “loose” suction line heat exchanger with the purchase of your ice flaker. Installation of this heat exchanger is required. The heat exchanger should be installed within 4 feet of the flaker per Howe guidelines. Please see Howe installation and service manual for suggested piping diagram.
- Page 3 (left) until it stops. Turn clockwise accordingly to desired setting. For more complete information on how to adjust and maintain your Howe Flaker, please refer to the troubleshooting guide in the installation manual (included with every ice machine), or request the most current manual from service@howecorp.com...
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