Installation
RRU-SVX01F-EN
25
requirements. Protection devices must be sized according
to the electrical data on the nameplate.
1. Location of the applicable electrical service entrance is
. Complete the
unit’s power wiring connections onto either; the main
terminal block HTB1 inside the unit control panel, the
factory mounted nonfused disconnect switch (UCD) or
circuit breaker (UCB), or the electric heat terminal
block. Refer to the customer connection diagram that
shipped with the unit for specific termination points.
2. Provide proper grounding for the unit in accordance
with local and national codes.
3. If not provided as part of this unit, an electric
disconnect switch (see unit nameplate for rated
voltage and ampacity) shall be installed in accordance
with Article 430 of the National Electric Code ANSI/
NFPA 70.
Installation Standards
Information for installation of the heater:
1. In Airplane Hangars in accordance the Standard for
Aircraft Hangars ANSI/NFPA 409.
2. In Public Garages in accordance with the Standard for
Parking Structures ANSI/NFPA 88A or the Standard for
Repair Garages ANSI/NFPA 88B and with CAN/CSA
B149.1 Natural Gas and Propane Installation Codes.
Main Unit Power
1. Location of the applicable electrical service is
illustrated below. Refer to the customer connection
diagram that is shipped with the unit for specific
termination points. The termination points, depending
on the customer option selected would be a factory
mounted nonfused disconnect switch (UDC).
2. Provide proper grounding for the unit in accordance
with local and national codes.
Field Installed Control Wiring
An overall layout of the various control options available
with the required number of conductors for each control
device is illustrated in
and
.
Note:
All field wiring must conform to NEC guidelines as
well as state and local codes.
Control Power Transformer
The 24-volt control power transformers are to be used only
with the accessories called out in this manual.
Transformers rated greater than 50 VA are equipped with
internal circuit breakers. If a circuit breaker trips, turn “Off”
all power to the unit before attempting to reset it.
The transformers are located in the control panel. The
circuit breaker is located on the left side of the
transformers and can be reset by pressing in on the black
reset button.
Controls Using 24 Vac
Before installing any connecting wiring, refer to
to
for the electrical access locations provided on the
unit and
for AC conductor sizing guidelines, and;
1. Use copper conductors unless otherwise specified.
2. Ensure that the AC control wiring between the controls
and the unit’s termination point does not exceed three
(3) ohms/conductor for the length of the run.
Note:
Resistance in excess of 3 ohms per conductor
may cause component failure due to
insufficient AC voltage supply.
3. Be sure to check all loads and conductors for grounds,
shorts, and mis-wiring.
4. Do not run the AC low voltage wiring in the same
conduit with the high voltage power wiring.
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. Verify with an appropriate
voltmeter that all capacitors have discharged.
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not designed
or qualified to accept other types of conductors.
