Electrical Requirements And Diagrams - Re-Verber-Ray LD Series Installation Manual

LD Series
Electrical Requirements
Improper installation, adjustment, alteration, service or maintenance can cause property
damage, serious injury or death. Read and understand, the installation, operating and
maintenance instructions thoroughly before installing or servicing this equipment. Only
trained, qualified gas installation and service personnel may install or service this
equipment.
The tube heater must be electrically grounded in accordance with the following codes:
United States: Refer to National Electrical Code
conform to the latest edition of National Electrical Code
special diagrams furnished.
Canada: Refer to Canadian Electrical Code CSA C22.1 Part 1 (latest edition).
Thermostat
Connecting the thermostat with a voltage other than 24V may damage the heater. The LD Series requires
a 24V connection to the thermostat. This is either supplied by the heater internally (standard) or by an
external transformer (with optional relay board, P/N: HLRB). See below.
• 120 Volt - 60 Hz GRD, 3-wire.
• 24V thermostat connection.
• Starting current 4.8 amps
• Running current 1.1 amps
The LD Series is equipped with or without a relay board (P/N: HLRB). The optional relay board must be
factory installed.
Standard Configuration
Without relay board (identified with white crescent around the terminal block):
• Single burner control box.
• Single thermostat.
Optional Configuration
With relay board (identified with orange crescent around the terminal block):
• A single thermostat controls two or more burner control boxes.
• Heaters are common vented.
• Must be factory installed.
NOTE: Units with a relay board installed must have an external transformer (field supplied), see wiring
diagram (Figure 3.1B).
LD Series heaters require a 24V, two stage thermostat to operate. The burner control box is equipped
with either a round terminal strip that accepts three (3) 1/4" insulated female spade terminals or a 36"
yellow 24V control wire. Do not supply 120V to the 24V connection. The 120V connection is factory wried
with a three-prong pig tail. Refer to LD Series field wiring diagram (Figure 3.1).
NOTE: Different thermostats operate according to their particular features. Refer to thermostat
specifications for details.
WARNING
!
® , ANSI/NFPA 70 (latest edition). Wiring must
NOTICE
33
3.0 Installation • Electrical Requirements
® , local ordinances, and any
24V
- 24V HEATER OUTPUT -
HIGH
LOW
24V OUT