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Installation and Operating Instructions
Installation
For best performance at high ambient temperatures, there must be free air
circulation over the cooling unit at the rear of the freezer.
Ensure that there is a free air space above the freezer and that the flue (chimney) on
top of the cabinet is not covered in any way. Do not place the freezer in a space
where air circulation is restricted. Follow “clearance” instructions.
This free-standing freezer requires accessibility to the back for servicing the gas
equipment, which can be obtained by using a certified Flexible Metal Connector to
allow the freezer to be withdrawn without disrupting the gas supply. “Where a
flexible metal connector is used, it must comply with local authorities and in Canada
with the provisions of the current Standard CAN 1-6.10, Metal Connectors for Gas
Appliances”. However, if the Local Authorities require a rigid gas supply connector,
the freezer should be located with sufficient space at the back for servicing or, if
located against a wall a removable panel of a minimum size of 16” x 20” should be
provided in the wall to allow access to the rear of the freezer. If you purchased a
CM (CO Monitor model) you must follow instructions in Section 7 - 5.0
onward.
While using on electrical operation this unit can be used in an enclosed area but must still
be protected from moisture as comply with all clearances.
For installation, proper clearances from combustible material to the freezer, the following
minimum clearance must be observed.
Chapter
2
UNIQUE UGP 6F
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Clearances
Minimum clearances to combustible materials are: Top 27”, Sides 2”, Rear 4”
Note: DO NOT install the appliance directly on carpeting. Carpeting must be
removed or protected by a metal or wood panel beneath the appliance, which
extends at least the full width and depth of the appliance.
Keep appliance area clear and free from combustible materials, gasoline and other
liquids with flammable vapors.
WARNING – DO NOT USE FLAME TO CHECK FOR GAS LEAKS
Gas Connection
Hook-up to the gas supply line: 3/8” SAE (UNF 5/8” - 18) male flare connection. A
backup wrench must be used when tightening gas supply fitting. All completed
connections should be checked for leaks with a non-corrosive leak detector and/or soap
and water for a bubble check.
The gas supply system must incorporate a pressure regulator to maintain a supply
pressure of not more than 12” water column and no less than 11” water column. (Max
setting)
UNIQUE UGP 6F
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Make sure the freezer and any other high BTU appliances on your line are turned on
when checking the gas pressure. The appliance and its individual shut-off valve must be
disconnected from the gas supply piping system during any pressure testing of that
system at pressures in excess of ½” psig.
If detailed instructions on the installation and connection of the gas supply are required,
contact your dealer or distributor.
Levelling
Ensure the freezer is leveled by using a 2ft level; the operation of this unit uses an
absorption system which requires the appliance to be level in order to operate
effectively.
General Operating Instructions
Importance of Leveling a Freezer
The freezer must be adjusted to a vertical position in both directions. In an absorption
refrigeration system, ammonia is liquefied in the finned condenser coil at the top rear of
the freezer. The liquid ammonia then flows into the evaporator (inside the freezer) and is
exposed to circulating flow of hydrogen gas, which causes the ammonia to evaporate,
creating a cold condition in the freezer.
When starting this freezer, the cooling cycle may require up to 8 to 12 hours of running
time to begin cooling before the cooling unit is fully operational, you can then begin
slowly loading the compartment.
The tubing in the evaporator section is specifically sloped to provide a continuous
movement of liquid ammonia, flowing downward by gravity through this section. If the
freezer is operated when not level, liquid ammonia will accumulate in sections of the
Adjust the 4 feet at bottom
of freezer to achieve level
