Unit installation

24
MECHANICAL VENTING
SINGLE UNIT INSTALLATION
When mechanical venting of these heaters is desired, the following
kits are available.
BTR(C) 120 through the BTR(C) 200/A
A. O. Smith part number 193933
BTR(C) 250/A through the BTR(C) 500/A
A. O. Smith part number 193933-1
Where an approved poweer venter is to be installed to operate in
conjunction with the water heater thermostat, the following codes
must be adhered to. Field wiring should conform to the latest
version of the National Electric Code ANSI/NFPA No. 70. For
Canadian installations the electrical connections and grounding
shall be done in accordance with the current Canadian Electrical
Code CSA C22.1 Part 1 and/or local codes.
NOTE: The power venter must be installed downstream of the
drafthood. See figure 13.
• Install power venter in the vent system.
• Take one way plugs and insert male into thermostat connector
and plug female into connection coming from drafthood.
• Run 120 VAC to power venter.
See side wall vent kit installation manual for complete instructions.
FIGURE 13
VENT INSTALLATION
Seal all joints between the power venter and the vent termination.
This is to prevent leakage of exhaust products into the room(s)
due to positive pressure of blower.
The "Sequence of Operation" description will be the same with
mechanical venting except,
When the appliance thermostat calls for heat:
Thermostat contacts "Close" and the power venter blower
(120 VAC) is energized. Sufficient draft must be established for
the "Draft Prover Switch (N.O.)" to "Close". When the draft prover
switch "Closes" the relay coil of the flue damper is energized.
See side wall vent kit installation manual for complete instructions.
MULTIPLE UNIT INSTALLATIONS
For multiple unit installations, contact A.O. Smith Water Products
Company, Technical Support Center at 1-800-527-1953. In
Canada, contact A.O. Smith Enterprises, Ltd. at 1-800-265-8520.
TABLE lV
MANIFOLD GAS PRESSURE IN INCHES
OF WATER COLUMN (ALL MODELS*)
SAGFOEPYT
larutaNenaporP
5.30.01
Gas pressure specified in Table lV, refer to flow pressure taken at
pressure tap of automatic gas valve while heater is operating.
TABLE V
APPROXIMATE TIME REQUIRED TO CONSUME
1 CU. FT. OF GAS AT FULL CAPACITY
TUPNI
ETAR
)HUTB(
EPYT
FO
SAG
HUTB
REP
.TF.UC
D’QEREMIT
EMUSNOCOT
.TF.UC1
SAGFO
000,021
LARUTAN
ENAPORP
0501
0052
.CES5.13
.CES0.57
000,451
LARUTAN
ENAPORP
0501
0052
.CES5.42
.CES4.85
000,081
LARUTAN
ENAPORP
0501
0052
.CES1.12
.CES3.05
000,091
LARUTAN
ENAPORP
0501
0052
.CES9.91
.CES4.74
000,991
LARUTAN
ENAPORP
0501
0052
.CES0.91
.CES4.74
000,052
LARUTAN
ENAPORP
0501
0052
.CES1.51
.CES3.53
000,152
LARUTAN
ENAPORP
0501
0052
.CES60.51
.CES1.53
000,572
LARUTAN
ENAPORP
0501
0052
.CES57.31
.CES2.23
000,503
LARUTAN
ENAPORP
0501
0052
.CES4.21
.CES5.92
000.063
LARUTAN
ENAPORP
0501
0052
.CES4.11
.CES0.42
000,563
LARUTAN
ENAPORP
0501
0052
.CES4.01
.CES7.42
000,993
LARUTAN
ENAPORP
0501
0052
.CES5.9
.CES6.22
000,005
LARUTAN
ENAPORP
0501
0052
.CES6.7
.CES0.81
Figures shown are valid for 0-2000 ft. installations. See “HIGH
ALTITUDE INSTALLATIONS” for deration requirements over
2000 ft.