A DJ & DG MANUAL
10 of 34 May 12 R2
The location of the equipment split line may result in the wire being disconnected at the device it is feeding.
The wire bundle will be tagged and identified. Confirm correct rotation of 3 phase devices after the wiring
connections has been completed.
Control wire: this wire is typically broken near the split line, to be reconnected at either a enclosed terminal
block, junction box or extended to a nearby control panel. Each wire or wire bundle will be tagged and
numbered to indicate the location it is sent to.
Sensor wire shield: The drain wire from the shield must be grounded (at one end only). A ground
connection point is available for connection at the point of termination.
All loose wiring must be securely fastened to the equipment casing upon completion.
PIPING, ELECTRICAL OR CONTROL SERVICE CONNECTIONS
DO NOT install anything that will interfere with equipment access or the rating plate.
Engineered Air equipment is constructed with cabinet and floors designed to prevent water from entering
the building through the installed unit. When ordered, factory installed pipe chases and/or electrical chases
are built into the unit floor. Factory chases are provided with covers that need to be replaced and sealed
after piping and electrical connections are made.
THE FLOOR OF THE UNIT HAS BEEN MADE WATER-RESISTANT. DO NOT CUT OR DRILL HOLES
IN THE FLOOR OR USE PENETRATING FASTENERS.
All penetrations through the unit walls must be caulked and sealed to prevent air and/or water from
entering the unit.
NATURAL GAS AND PROPANE INSTALLATION:
1. Installation must be made in accordance with the requirements of the authorities having jurisdiction.
2. Check the unit rating plate and confirm fuel type, supply pressure, input rating and temperature rise.
3. Refer to the heater rating plate for determining the minimum gas supply pressure for obtaining the
maximum gas capacity for which this heater is specified.
4. Gas supply pressure higher than the unit rating plate requires an additional field supplied gas regulator.
5. Install an approved appliance shutoff valve on the gas supply in accordance with the requirements of
the authorities having jurisdiction.
6. Gas lines shall not interfere with unit access. The gas line connection at the heater shall have an
approved drip leg with screwed cap.
7. A minimum 1/8 inch NPT plugged tapping, accessible for test gauge connection, must be installed
immediately upstream of the gas supply connection to the unit.
8. On indoor units any control device (regulator, diaphragm valve, high and low pressure switch, etc.) that
requires a bleed or vent line, must be vented in accordance with applicable codes.
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