Garland PHD PLUS Installation and operation manual - Operating Instructions
Part # 1844066 Rev 01 (02/13/2008)
Page 7
OPERATING INSTRUCTIONS
The PHD PLUS provides two heating zones. The upper
element rated at 350 Watts is the primary air heat source. The
lower element rated at 550 Watts is used to heat the water
when operating the humidity mode and assists in heating
the air in dry operating modes.
The temperature control provides the following features:
• Continuous actual air temperature display provides an
accurate indication for food safety.
• The temperature can be displayed in Celsius or
Fahrenheit degrees.
• Four Menu settings. Up to four preset air and humidity
setting can be made.
• A unique humidity program provides an accurate
and repeatable method of controlling the humidity
throughout the air temperature range.
• Air temperature settings up to 200°F/93°C.
• Humidity settings up to 90%.
Explanation of Controls:
°F
°C
°F Display LED
°C Display LED
Parameter Adjust
Mode Indicator LED
Service/Select Key
(hidden on some models)
Increase Key
Decrease Key
°F DISPLAY LED: Indicates that the °F display is selected.
°C DISPLAY LED: Indicates that the °C display is selected.
PARAMETER ADJUST MODE LED: Indicates that the
parameter adjust mode is selected.
DIGITAL DISPLAY: Normally displays the actual air
temperature and pre-programmed menus. In set mode
displays other parameters.
SERVICE / SELECT KEY (Hidden on some models): Used to
enter the parameter adjust mode or select a preprogrammed
menu.
INCREASE KEY: Increases the selected parameter value.
Views the air temperature set point in operation mode.
DECREASE KEY: Decreases the selected parameter value.
Views the humidity set point in operation mode.
NOTE The display parameters may be changed in steps by
pushing the or keys repetitively, or automatically by
holding down the same key longer. Digits will increment
or decrement at accelerating rates as the or keys is
continually pressed.
Control Basics
There are a number of control features, which need to be
understood before proceeding with programming and
operating the PHD PLUS.
1. Default air temperature of 150°F or 66°C and 50%
humidity has been programmed in.
2. No preset temperature and humidity has been
programmed.
3. When the unit powers up the control defaults to the last
programmed setting.
Getting Started
Connect the power supply and turn the power switch to the
“1” position.
When power is first applied to a factory unit: the display
will show [888] and the 3 status LED’s will come on for 10
seconds and then go off for 1 second.
The actual air temperature will be displayed.