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LDAP-IOM (01-22) 207733-A
Table 12. Field-Supplied Control Wiring Sizes
Distance from Unit to Control
(Feet (Meters))
Minimum Recommended Wire Gauge
(AWG)
Total Wire Length
(Feet (Meters))
75 (23)
#18
150 (46)
125 (38)
#16
250 (76)
175 (53)
#14
350 (107)
Fan Motor Wiring
Fan motor wires are color-coded as follows:
•
White = neutral
•
Black = high (heat speed)
•
Blue = medium (destratification speed, factory-wired)
•
Red = low (optional destratification speed, field-wired)
Thermostat Wiring
•
Each heat section in the heater has a terminal strip for 24V thermostat connections . The terminal strip is located
on the outside of the cabinet at the front of each heat section . Wires from the terminal strip(s) are factory wired
to the circuit board(s) .
•
Use either an optional thermostat available with the heater or a field-supplied 24V thermostat . Install according to
the thermostat manufacturer’s instructions, paying particular attention to the requirements regarding the location
of the thermostat .
•
Make thermostat connections at the terminal strip on the front of the heater . The strip has seven terminals, R, G,
C, Y1, Y2, W1, and W2 . Refer to the wiring diagram on the heater .
•
Refer to
for field-supplied control wiring sizes .
Optional Discharge Air Connections
NOTES:
• After the unit is suspended/mounted, install the air directional louvers or optional nozzle.
• Each option package includes illustrated installation instructions.
All Model LDAP heaters have discharge louvers but are available with additional louvers and/or nozzle discharge
air options . Optional louver and discharge nozzles are shipped separately for field installation . Heat sections on unit
sizes 800 and 1200 have independent airflow and do not require the same discharge options .
Four-Way Discharge Louvers (Option CD32)
⚠ CAUTION ⚠
To avoid getting burned, adjust louvers while heater is not operating. If adjusting louvers while
heater is operating, wear gloves.
Option CD32 consists of additional louvers that are installed perpendicular to the standard individually-adjustable
louvers . By installing the optional perpendicular louvers, the two sets of louvers can be adjusted to direct airflow in
any of the four directions, enabling the installer to select and increase or decrease the coverage area .
Discharge Nozzles (Options CD57, CD58, and CD59)
A discharge nozzle may be installed at each discharge air opening in any direction . The following options are available:
• Option CD57:
30-degree discharge nozzle
• Option CD58:
60-degree discharge nozzle
• Option CD59:
30-degree discharge nozzle with four-way louvers
NOTE: Do not install four-way louvers with a 60-degree nozzle.
