Installation Manual

APPENDIX U:
SNOW MELTING DIAGRAM: TYPICAL LINE DIAGRAM (FOR 12 CIRCUITS/CABLES) WITH SCV-DUAL WITH RELAY
SCV-DUAL
VALUE
CONTROL
Designed to be mounted using
either 3/4" or 1" PVC conduit,
supplied by customer.
OR
INSTALL IN ACCORDANCE WITH THE REQUIREMENTS OF ALL APPLICABLE ELECTRICAL AND BUILDING
CODES AND REGULATIONS. ENSURE THAT ALL CONDUIT/CABLE TERMINATIONS ARE WATERTIGHT.
120 Volt AC
BLACK
YELLOW
YELLOW
WHITE
RELAY
NEUTRAL
LINE
120 VAC
277V CIRCUITS
120V
CONTROL
POWER
Heater cable 50ft cold leads to be taken through
3/4” (19mm) rigid metal conduit back to J-boxes.
Installer may use more J-boxes
outside or inside building.
277V CIRCUITS
J-BOX
J-BOX
HEATER CABLE / MAT #1
HEATER CABLE / MAT #2
HEATER CABLE / MAT #3
HEATER CABLE / MAT #4
HEATER CABLE / MAT #5
HEATER CABLE / MAT #6
277 VAC
BREAKER PANEL
RLY-12PL
RELAY PANEL
OutsideInside
120 VAC
BREAKER PANEL
J-BOX
J-BOX
HEATER CABLE / MAT #7
HEATER CABLE / MAT #8
HEATER CABLE / MAT #9
HEATER CABLE / MAT #10
HEATER CABLE / MAT #11
HEATER CABLE / MAT #12
120V
SWITCHED
POWER
(conduit size as per installer
/ local code requirements)
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