Carter-Hoffmann HL10-36 - Manual (Page 9)

NORMAL OPERATION
CAUTION:
HOT SURFACE
Inner surfaces of the unit
will be very hot during and
after operation.
Avoid touching the cabinet
when loading or removing
product.
First Use
Turn the cabinet on using the power switch located on the far left side of the
control panel. Once the switch is turned on, the control display will illuminate.
When the cabinet is first turned on, the temperature display will show the current
hardware / software revision, for example: “r26”. Then display will then alternate-
ly flash “PrE” and the set point values.
To adjust the temperature or humidity setting, rotate the respective dial to the
desired set point and stop. After 3 seconds, if either setting is adjusted, the new-
ly adjusted value will be stored in the controllers memory. If the cabinet power is
interrupted, the last value set will be the new value restored upon power being
restored.
It will take approximately 30 minutes for the cabinet to warm up to a factory de-
fault setting of 160ºF (71
°C). Once the set point is reached, a short alarm burst
will be heard to indicate that the cabinet has reached the set point.
Humidity system
This holding cabinet is equipped with a water reservoir and automatic fill system
(standard) that will be used to humidify the cabinet. The reservoir will not auto-
matically begin to fill until the lowest water level probe is submerged. This is a
safety feature that will prevent the automatic fill system from operating if the res-
ervoir has been removed.
To activate the auto fill system, the reservoir must be primed. Pour potable water
into the reservoir until the water touches the lowest level probe. Once the lowest
probe is in water, the fill valve will turn on and the reservoir will begin to fill. Once
the highest level probe senses water, the fill solenoid will turn off.
Due to the differences in water supply conditions, it may be necessary to cali-
brate the cabinet to properly sense your water supply. Please see pages 7-8 for
the calibration procedures.
As the unit maintains the desired humidity level, water will be used from the res-
ervoir. When the water level drops below the low level probe, the fill solenoid will
turn on again thus repeating the cycle. The holding cabinet is equipped with a
low water alarm, see the following page for details on the alarm system.
Although the cabinet is equipped with an auto fill system, it is not necessary to
have the cabinet coupled to a water supply line. The reservoir can be filled man-
ually. As long as the low level probe is in contact with water, the control can
maintain the desired humidity setting.
Humidity settings at high levels will cause condensation to collect in the cabinet.
A removable condensation trough is located at the base of the door to collect
excess water. Check periodically and empty when full.
Factory default setpoints:
- temperature: 160ºF (71 °C)
- humidity: 50%
- low temp alarm:140ºF(60
°C)
Operating ranges:
- temp alarm: 80ºF-180ºF
(27-82ºC)
- air temp: 90ºF-200ºF
(32-93ºC)
- humidity: OFF-90%
The factory default for the
temperature display is in ºF.
To change the display to
read in ºC, push in and hold
the view actual button for 10
seconds. The display will
now read in ºC.
To change the display temp
back to ºF, repeat the same
procedure above.
CAUTION:
STEAM HAZARD
This unit produces
steam, use caution when
cleaning or opening the
Water reservoir located at top left of cabinet interior.
To fill, pull out metal frame with pan. IF CABINET IS HOT, USE OVEN MITTS AND PRO-
CEED WITH CAUTION—FRAME AND WATER WILL BE HOT.
To remove, pull out metal frame. DO NOT REMOVE IF CABINET OR WATER IS HOT.
ALLOW CABINET TO COOL COMPLETELY. While holding metal frame, slide pan to rear
and then lower to clear the frame. To install, reverse procedure.
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