52S
SERIES
• INSTALL ENERGY MANAGEMENT (EM) ACCES-
SORY KIT -- This accessory kit permits individual
units to be turned off from a remote location such as a
hotel control desk to conserve energy when the room is
unoccupied. Freeze guard protection prevents the
room temperature from dropping below 40 ° F, overrid-
ing any OFF command, including fl'ont desk control.
IMPORTANT: In order for fl'eeze guard to operate,
the unit must be put into the HEAT mode.
Electric heat will remain activated until the tempera-
ture reaches approximately 60 ° F.
IMPORTANT: The manufacturer currently does
not supply any central desk equipment. This type
of equipment should be handled through your local
electrical contractor.
I
See Figure 14 for accessory kit location in control box.
After EM accessory kit has been properly installed,
connect low-voltage (24 VAC) field-supplied wires from
chassis terminal board to your central desk panel (see
Figure 15).
SCREW
PLACEMENT
PUSH BUTTO5
SWITCH
_CONTROL
BOX
EM ACCESSORY
CONTROL BOX
COVER
SCREW PLACEMENT
FIGURE 14 -- EM ACCESSORY KIT
5W
m
24V
WIRING B
B
BLK BLK
__--]
[] TB
LEGEND
FGT -- Freeze Guard Terminal Board
Thermostat _) Connection
NEC -- National Electrical Code .... Field ControlWiring
SW -- Switch
Primary Relay
TB -- Terminal Board
NOTES:
1. All wiring must conform with NEC and local codes.
2. Fieldcontrol wiring suitablefor NECClass2 control circuit, at 24volts.
FIGURE 15 -- EM ACCESSORY KIT
SCHEMATIC DIAGRAM
ADJUSTMENTS
• ADJUST AIRFLOW DIRECTION -- The discharge
air grille is mounted on the unit so that the air dis-
charges forward. If upward discharge is required,
remove the grille, invert it, and reinstall on the
chassis.
• ADJUST VENT -- The VENT knob is located on the
side of the unit. Slide VENT knob manually to open or
close vent. Vent remains in the position selected.
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