Specifications - A.O. Smith T-H2S-DV Troubleshooting Manual

Table 1: SPECIFICATIONS ‐ 520 (T‐H2) / 320 (T‐H2S) Direct Vent Indoor* and Outdoor
Model
Dimensions
Weight
Max
INPUT
BTU/h
Min
Combustion System
Installation
Fan motor
Max
Manifold
Pressure**
Min
Flow rate
Available set
temperatures
Temperature on
the unit settings
Bypass valve
Thermistors
Remote controller
model
PCB model
Indicators
Power supply
control
Freeze protection
Self‐combustion
improvement
Easy‐Link system
Multiple‐system
* The 520 Direct Vent Indoor (T‐H2‐DV) and 320 Direct Vent Indoor (T‐H2S‐DV) means the 520 Indoor (T‐H2‐DV)
and 320 Indoor (T‐H2S‐DV) in the text.
**The manifold pressure measurement is based on conditions without front cover.
520 Direct Vent 520 Outdoor
Indoor (T‐H2‐DV)
73 lbs.
199,000
Direct‐vent
LP 4.9" WC
Natural 3.6" WC Natural 2.8" WC
LP 1.0" WC
Natural 0.7" WC Natural 0.6" WC
100°F, 105°F, 110°F, 115°F, 120°F, 125°F, 135°F, 140°F,
145°F, 150°F, 155°F, 160°F, 165°F, 170°F, 175°F, 185°F
4 thermistors 3 thermistors
(In, Out, Mixing)
(In, Out, Mixing, Exhaust)
T‐H2 (Part #319143‐126)
Red LED on PCB during operation & 3‐digit 7‐SEG LED
Surge absorber & Power ON‐OFF switch
Ceramic heaters and Auto‐firing system
Yes (Up to 4 units)
3|
320 Direct Vent
(T‐H2‐OS) Indoor (T‐H2S‐DV)
H25.6"×W18.5"×D12.4"
71 lbs. 73 lbs.
13,000
Power vent
Outdoor Direct‐vent
PWM turbo fan
LP 4.3" WC
LP 4.6" WC
Natural 2.5" WC
LP 0.9" WC LP 1.0" WC
Natural 0.7" WC
0.5 GPM to 9.0 GPM
100°F to 185°F
default: 120°F
Yes
4 thermistors
(In, Out, Mixing, Exhaust)
Part # 9007603005 (TM‐RE30)
T‐H2S (Part #319143‐196)
Air‐Fuel Ratio Detection System
N/A
Page
Troubleshooting Guide
320 Outdoor
(T‐H2S‐OS)
71 lbs.
180,000
Outdoor
LP 3.6" WC
Natural 1.9" WC
LP 0.9" WC
Natural 0.6" WC
3 thermistors
(In, Out, Mixing)
N/A