Operating instructions

26
ATMOSPHERIC
Wiring locations
LO NOx
Wiring locations
ELECTRICAL WIRING
NOTE: If it is necessary to replace any of the original
wiring, use 105°C wire or its equivalent, and/or 150°C
wire or its equivalent, like the original wiring.
MILLIVOLT MODELS
The Millivolt models are equipped with a self-generat-
ing electrical system in which the electrical current is
provided by a pilot generator. No external electrical
connections are required.
When installing a remote switch, do not exceed 10 ft of
wiring from the heater. Use 18-gauge stranded wire.
DIGITAL AND ADVANCED FLAME TECHNOLOGY
(AFT) MODELS
The standard field-wiring connection is on the right
side of the heater.
To wire the heater from the left side, follow these
steps :
1. Remove the two (2) screws that hold the front door
to the heater. Remove and set aside door for bet-
ter access to wiring.
2. Remove the four (4) screws that hold down the
junction box to the sway brace.
3. Remove the transformer cover located on the far
right by removing one (1) screw.
4. Remove the two (2) screws that hold down the
transformer.
5. Remove the one (1) screw that holds down the
ground wires.
6. Disconnect P6 connector from PC board.
7. Remove transformer from its current location and
relocate it on the far left side of the heater.
8. Re-route all high-voltage wires and ground wires
through the left jacket side of heater.
9. Re-install P6 connector, ground wires (SPG),
transformer, junction box, front door, and plug right
side with the left side’s grommet plug.
NOTE: 7/8" dia. holes not utilized on jacket and control
box can be used for fireman switch, auxiliary control
interface or power vent (D-2) wiring.
The Electronic Intermittent Ignition Device automati-
cally lights the pilot and main burners upon a call for
heat. The heater is supplied with a dual-voltage trans-
former for 120 VAC or 240 VAC input power hookup.
OPTION LOCATION
LEFT SIDE FIELD WIRING
CONTROL BOX
(FACTORY MOUNTED
LOCATION)
SWAY
BRACE
BONDING
LUG
(STANDARD
LOCATION)
BONDING
LUG
(OPTIONAL
LOCATION)
OPTION LOCATION
LEFT SIDE FIELD WIRING
CONTROL BOX
(FACTORY MOUNTED
LOCATION)
SWAY BRACE
BONDING LUG
(STANDARD
LOCATION)
BONDING LUG
(OPTIONAL
LOCATION)
CAUTION: Heater must be electrically grounded and
bonded. Bonding lug is provided loose with the
heater. Install bonding lug on lower right or left side
of jacket as necessary for bonding the heater.
Mounting hole is provided on the jacket.
NOTE: Failure to ground the heater electrically
could affect the heater’s electronics.
WARNING:
Heaters are factory-wired for 240 VAC power sup-
ply. DO NOT attempt to operate at 208 VAC.
NOTE: See page 42 for further instructions if using
a time clock/fireman’s switch.
NOTE: Lo NOx heaters manufactured November
2010 (serial number beginning with “1011”) and later
are equipped with Advanced Flame Technology
(AFT) boards. Lo NOx heaters manufactured before
November 2010, and all atmospheric heaters are
equipped with Digital PC boards.