Space Ray LTU Series Two Stage - Manual (Page 17)

Form #42710010
May 2013
-15-
13.0) ELECTRICAL CONNECTIONS
Failure to do so may result in death or serious injury.
This appliance must be connected to a properly grounded electrical source.
Disconnect electrical power and gas supply before servicing.
ELECTRIC SHOCK HAZARD
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 supply circuit supply circuit supply circuit to the heater, wiring material having a minimum size of 14 AWG and a
temperature rating of at least 90°C shall be used.
INCOMMING
POWER SUPPLY
CONNECTION
Viewed From
Inside Control Box
Draft Inducer
Control Box
Ground
Screw
Terminal
Block
L2 L1
GROUND NEUTRAL 120V
Motor Lead Wires
Relay
Inside Control Box
3
Connector Wire
(relay to black
motor lead)
Motor Lead Wire (black)
Motor Lead Wire (white)