Electrical Connections - Space-Ray LTU Series Installation And Operation Instructions Manual

16.0)

ELECTRICAL CONNECTIONS

1. All electric wiring shall conform to the latest edition of the National Electrical Code (ANSI/NFPA No. 70),
or the code legally authorized in the locality where the installation is made.
2. The unit must be electrically grounded in accordance with the National Electrical Code (ANSI/NFPA No.
70-latest edition). In Canada, refer to current standard C22.1 Canadian Electrical Code Part 1.
3. The wiring providing power to the heater shall be connected to a permanently live electrical circuit, one
that is not controlled by a light switch.
4. The power supply to the unit should be protected with a fused disconnect switch or circuit breaker. A
service switch, as required by local codes, shall be located in the vicinity of the heater (check local codes
for allowable distances) and should be identified as Heater Service Switch. All electrical wiring must be
located in accordance with the required Clearances to Combustibles from the heater as listed on the
nameplate on the heater.
5. When connecting the supply circuit
a temperature rating of at least 90°C shall be used.
6. LTS LTS SERIES ONLY: SERIES ONLY: The installer will provide type 3 core SJO cable having minimum size of 18 AWG to
LTS LTS SERIES ONLY: SERIES ONLY:
connect between the draft inducer junction box and the control box. See wiring diagram below. Secure
with 3/8" connectors as previously described in the attachment of the control box and draft inducer.
Connect wire leads as shown in the Connection Wiring Diagram. The SJO cable should be located and
secured to protect it from mechanical damage.
Form #43155040
May 2013
supply circuit supply circuit to the heater, wiring material having a minimum size of 14 AWG and supply circuit
-35-
ELECTRIC SHOCK HAZARD