A.O. Smith BTH 120 Service Handbook - Component Part Information
Other manuals for BTH 120:
Service handbook
Manual is about: COMMERCIAL GAS HIGH EFFICIENCY WATER HEATERS BTH 120 THRU 500
SERIES 200/201
of
65
A. O. Smith Water Products Company
Service Handbook
Irving, Texas 2000
©
Training Department
31
BTH Model Main Burner Orifice No. Main Orifice Size Inches
199
192477-0
0.304
150
192477-1
0.235
250
192477-2
0.360
120
192477-3
0.204
199 Prop
192477-4
.166*
150 Prop
192477-5
.141*
*-4 and -5 Red plated for propane.
** -4 and -5 stamped with "P" for propane
Note: Hex head of main burner orifice is upstream end - gas flows ou
Orifice Table
Model
AOS PT#
Voltage
W.R. 36E36-319
192966-0 Nat.
24 VAC
W.R. 36C68-814
192454-1 Prop
24 VAC
Flame Rod
AOS PT#
192478
AOS PT#
Voltage
192478
120 VAC
Hnwl VR8305M-4009 192797-Nat.
24 VAC
W.R. 36C68-809
1922454-0 Nat.
24 VAC
Hot Surface Igniter (HSI)
HSI
Flame S
.7 Micro
COMPONENT PART INFORMATION
GAS VALVES
ORIFICE TABLE
(µ)