Detroit Radiant Products Company QTD Series - Manual (Page 30)

QTD Series
30
3.0 Installation • Electrical Requirements • Field Wiring
WARNING
!
Electric Shock
Field wiring to the radiant tube heater must be connected and grounded in accordance
with national, state, provincial and/or local codes. In the United States refer to the most
current revisions to the ANSI/NFPA 70 Standard and in Canada refer to the most current
revisions to the CSA C22.1 Part I Standard.
Wiring
Figure 3.21 • Field Wiring Diagram • Multiple Unit operation on a Single 24V Control*
N L1
N
L1
PANEL
GROUND
120V BLACK
POWER CORD
24V YELLOW
CONTROL
CORD
Low Fire Common
Common
High Fire
PANEL
GROUND
G
W
BK
G
W
BK
120V BLACK
POWER CORD
24V YELLOW
CONTROL
CORD
Low Fire High Fire
G
W
BK
G
W
BK
EXTERNAL TRANSFORMER
REQUIRED.
A 40VA TRANSFORMER IS
SUFFICIENT TO OPERATE
UP TO TEN APPLIANCES.
NOTE: STAGE 1 IS THE
HIGHER TEMPERATURE
SETPOINT AND STAGE TWO IS
THE LOWER TEMPERATURE
SETPOINT
24V OUT - STAGE 1
(LOW FIRE)
24V OUT - STAGE 2
(HIGH FIRE)
24V IN BURNER BOX
24V Yellow Control Cord
Green: Common
White: Low Fire
Black: High Fire
* NOTE: In order for the unit to operate with this configuration, the
Dual Pole, Dual Throw Switch must be toggled to the 24VAC IN
position. (See Detail ‘A’)
CONTROL VOLTAGE SELEC TOR 24VAC IN 24VAC OUT
INSIDE SERVICE PANEL DETAIL ‘A’
CONTROL VOLTAGE SELECTOR
24VAC
IN
24VAC
OUT