Installation - Greenheck IDHB Installation, Operation And Maintenance Manual

Installation

Failure to follow instructions will void all warranties. For safe operation and best performance, the following
installation procedures must be adhered to.
Note: Do not "Bank " heaters (side by side). If greater capacity is required, proportion smaller heaters in separate
runouts. Heater control boxes must be completely accessible and located to provide ventilation at all times.
Duct Orientation
Heaters may be installed in the vertical sides of
horizontal or vertical ducts but never in the top or
bottom of a horizontal duct. Heaters are approved for
airflow in both directions when installed in horizontal
duct.
IDHB: Heaters installed in vertical ducts are tested and
approved for up airflow only!
IDHE: Heaters installed in vertical ducts are tested and
approved for up and down airflow.
1. Install heater a minimum of four feet:
- From heat pumps or central air conditioner
- Downstream from an air handler
- From any canvas duct connector or transition
in duct size
- Downstream from an air filter
- Upstream from a humidifier
2. At least 2 feet either side of an elbow or turn.
Control Cabinet Orientation
IDHB: The control cabinet must be positioned as
labeled on the unit.
IDHE: The control cabinet offset may be positioned in
either direction as chosen by the installer.
Slip-in Heater: To install a slip-in heater (Figure 1),
cut an opening as required in the side of the duct.
WRAPPER
Slide heater in the duct using the control box as
template to mark the mounting screw holes. Remove
unit and drill mounting holes. Mount unit to duct with
sheet metal screws. Connect high and low voltage
supplies along with fan interlock circuit (if no airflow
switch is furnished). Larger heaters may require
hangers. Connect high and low voltage supplies as
required.
Flange Heater: To install a flange type heater (Figure
2), insert heater between two sections of flanged
duct, and bolt in place. For additional strength, the
duct flange should be doubled as shown in the figure.
Large heaters may require hanger straps. Connect
high and low voltage supplies along with fan interlock
circuit (if no airflow switch is furnished).
4 Electric Duct Heaters
SLIP-IN HEATER
HEATING
ELEMENTS
TERMINAL OR
CONTROL BOX
FIGURE 1
SLIP-IN HEATER
WRAPPER
TERMINAL OR
CONTROL BOX
FIGURE 1
FLANGE HEATER
DOUBLE
LIP
1"
1"
WRAPPER
HEATING
ELEMENTS
TERMINAL OR
CONTROL BOX
FIGURE 2
HEATING
ELEMENTS
DOUBLE
LIP
1"
1"
WRAPPER