17
LO NOx UNITS
Heater
Model
BTUH
Input
(000)
(A)
Cabinet
Width
(B)
Flue
Dia.
(C)
Indoor
Drafthood
(D)
(J)
Min.
Gas
Conn.
Water
Conn.
Shipping Weights (lbs)
Standard
Heater
w/Stackless
Top
ASME
Heater
w/Stackless
Top
Indoor
Draft-
hood
R207A
199.5
20”
6”
55-5/8”
10.0”
11-3/4”
3/4”
2”
174
193
14
R267A
266.0
23”
7”
56”
11.5”
11”
3/4”
2”
197
216
16
R337A
332.5
26”
8”
57”
13.0”
10-5/8”
3/4”
2”
219
238
19
R407A
399.0
29”
9”
58-1/2”
14.5”
12-1/8”
3/4”
2”
237
256
21
Designation for a Digital or AFT heater using natural gas is “EN”.
Prefix “C” is for cast iron (ASME) headers; “P” is for plastic (polymer) headers.
Suffix “X” is for cupro-nickel tubing; “C” is for copper tubing.
EXAMPLE:
P-R407A-EN-X
= Plastic headers, 407 model size, digital, natural gas, cupro-nickel.
For altitudes above 5,000 ft., consult the factory.
For Canada, no de-rating is required for elevations up to 4500 ft.
Plastic (polymer) headers cannot be used for ASME installations.
*Note: For outdoor stack, use J dimension in the table above for appropriate size PLUS six (6) inches.
B
C
INDOOR
DRAFTHOOD
31-13/16"
7-3/4"
GAS
CONNECTION
J
A
20-1/2"
(22-1/2" ASME)
34”
STACKLESS
OUTDOOR
TOP
28”
26-1/2”
ELECTRICAL
CONNECTION
4-3/8”
(3-3/8” ASME)
8-7/8”
(6-5/8” ASME)
D
10"
FLUE
L
C
SPECIFICATIONS AND DIMENSIONS
Amp Draw
120 Volt 240 Volt
6
3
*
Summary of Contents for 206A
Page 28: ...28 WIRING DIAGRAM MILLIVOLT MECHANICAL THERMOSTAT ...
Page 29: ...29 WIRING DIAGRAM DIGITAL MODELS ATMOSPHERIC ...
Page 53: ...53 LO NOx HEATERS ...
Page 60: ......
