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Howard-McCray
A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •(215) 464-6800 •(800) 344-8222
Fax (215) 969-4890 •E-Mail: [email protected] 111118
6
Defrost Heater
The defrost heater is pressed into the underside
of the evaporator coil fins. The heat from the
heater rises into the evaporator and melts the
frost and ice that has accumulated on the coil.
To check if the defrost heater is operating
properly first verify that it receiving the proper
voltage with a voltmeter. Use an ammeter to
check for the proper current draw of the heater.
The amps for the heaters are as follows:
SF22: 5.2A @ 115V
SF48: 9.5A @ 115V
SF22: 4.8A @ 230V
Drain Pan Heater
The drain pan heater is attached to the drain pan
with aluminum tabs. The drain pan heater warms
the drain pan so that the condensate water from
the evaporator coil will not freeze to the pan, and
will drain freely out of the cabinet.
To check if the defrost heater is operating
properly first verify that it receiving the proper
voltage with a voltmeter. Use an ammeter to
check for the proper current draw of the heater.
The amps for the heaters are as follows:
SF22: 3.5A @ 115V
SF48: 3.5A @ 115V
SF22: 1.7A @ 230V
Crankcase Pressure Valve
Some freezer models utilize a crankcase
pressure valve to protect the compressor against
excessive suction pressure, during initial start-up
and upon termination of the defrost cycle. This
valve is factory set to limit the compressor
suction pressure to 20 PSIG, and should not be
changed.
To check this setting, it is necessary that the
pressure on the inlet side, or evaporator side, of
the valve be above 20 PSIG. If not checking
during the start-up, place the cabinet into the
defrost cycle, to obtain a raised evaporator
suction pressure. With a gauge installed on the
suction service valve, check for the proper
setting after the defrost cycles terminates. This
setting should be checked several times before
leaving the installation.
Maintenance Suggestions
An attractive operation can be a very profitable.
Dirty and poorly merchandised cabinets are
offensive to most discriminating customers, so a
clean attractive cabinet will pay dividends.
Weekly or more often, if necessary, the display
area should be cleaned and attractively stocked.
Important Notice
1. ALWAYS disconnect the power to the cabinet
before attempting to clean it with any liquid.
2. NEVER under any circumstances should a
water hose be sprayed into this cabinet.
3. NEVER use ammonia or solutions with
ammonia on this cabinet.
4. The use of abrasive cleaning materials on this
cabinet will VOID all cabinet warranties.
The Cleaning Process
1. Turn the power off from the source.
2. Remove all merchandise from the cabinet
and store in a refrigerated area. Then
remove all shelves and floor pans.
3. This cabinet can be hand cleaned internally
with a mild soap detergent and hot water.
Diluted non-chlorine bleach and hot water is
a good sanitizer. The cleaning cloth should
be just wet enough to get a reasonable
cleaning action but should not be wet to a
point where it will emit a large amount of
water which will flow through the drain
system causing it to overflow.
4. After the cabinet is cleaned, any remaining
water in the cabinet can be soaked up with
the use of a sponge and dried out with a dry
cloth completely before resuming
operations.
5. Make sure that the internal drain is open and
remove all scraps, paper, and lint.
6. All external panels may be cleaned with a
damp cloth, and then they may be polished
with a dry lint free cloth. This will preserve
the luster of the cabinet.
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