Manualshelf

Water Heater Brochure

ManualsBrandsA.O. Smith ManualsWater HeatersX3 - 5.8 GPM at 60° F Rise - 0.95 UEF - Propane Tankless Water Heater - Indoor
11121314151617181920
Accessories
Dimensions
Recess Box
Retrofit:
(100298009)
New Construction:
(100306285)
Pipe Cover
(100112718)
Remote
Temperature
Controller
(100276687)
0
1
2
3
4
5
6
7
8
9
10
20 40
540P: Flow Rate vs. Temperature Rise
60 80 100 120 140
Set temperature: 125°F or lower
Set temperature: 130°F or higher
11
Temperature rise (°F)
Flow rate (gpm)
540P Output Temp vs. GPM
540P: Pressure Loss
0
5
10
15
20
25
30
35
40
45
50
Pressure Loss (psi)
20
40
60
80
100
Head (ft)
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
Flow Rate (gpm)
Set temperature: 125°F or lower
Set temperature: 130°F or higher
0
540P Pressure Loss
COLD 5/8" (17 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
120 VAC 3" (77 mm)
Drain port 4-7/8" (124 mm)
HOT 6-3/4" (171 mm)
RETURN 3-1/8" (79 mm)
7-1/2" (189 mm)
COLD 5/8" (17 mm)
7-1/2" (189 mm)
17-3/4" (450 mm)
6-1/4" (159 mm)
7" (180 mm)
Φ 4" (102 mm)
15" (381 mm)
Φ 4" (102 mm)
FemaleFemale
23-5/8" (600 mm)
24-7/8" (631 mm)
RETURN 4-5/8" (117 mm)
GAS 5-1/8" (131 mm)
HOT 6-1/2" (164 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
Drain port 6-1/4" (159 mm)
120 VAC 3-7/8" (174 mm)
7-7/8" (199 mm)
11-1/4" (285 mm)
5-3/4" (147 mm)
Exhaust 2-5/8" (65 mm)
Intake 2-5/8" (68 mm)
RETURN 4-5/8" (117 mm)
GAS 5-1/8" (131 mm)
HOT 6-1/2" (164 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
1/2 (13 mm)
Drain port 6-1/4" (159 mm)
120 VAC 3-7/8" (174 mm)
7-7/8" (199 mm)
120 VAC 3" (77 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
Drain port 4-7/8" (124 mm)
HOT 6-3/4" (171 mm)
RETURN 3-1/8" (79 mm)
5-3/4" (147 mm)
6-1/4" (159 mm)
17-5/8" (448 mm)
540P Indoor (AT-H3P-DV)
COLD 5/8" (17 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
120 VAC 3" (77 mm)
Drain port 4-7/8" (124 mm)
HOT 6-3/4" (171 mm)
RETURN 3-1/8" (79 mm)
7-1/2" (189 mm)
COLD 5/8" (17 mm)
7-1/2" (189 mm)
17-3/4" (450 mm)
6-1/4" (159 mm)
7" (180 mm)
Φ 4" (102 mm)
15" (381 mm)
Φ 4" (102 mm)
FemaleFemale
23-5/8" (600 mm)
24-7/8" (631 mm)
RETURN 4-5/8" (117 mm)
GAS 5-1/8" (131 mm)
HOT 6-1/2" (164 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
Drain port 6-1/4" (159 mm)
120 VAC 3-7/8" (174 mm)
7-7/8" (199 mm)
11-1/4" (285 mm)
5-3/4" (147 mm)
Exhaust 2-5/8" (65 mm)
Intake 2-5/8" (68 mm)
RETURN 4-5/8" (117 mm)
GAS 5-1/8" (131 mm)
HOT 6-1/2" (164 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
1/2 (13 mm)
Drain port 6-1/4" (159 mm)
120 VAC 3-7/8" (174 mm)
7-7/8" (199 mm)
120 VAC 3" (77 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
Drain port 4-7/8" (124 mm)
HOT 6-3/4" (171 mm)
RETURN 3-1/8" (79 mm)
5-3/4" (147 mm)
6-1/4" (159 mm)
17-5/8" (448 mm)
540P Indoor (AT-H3P-DV)
COLD 5/8" (17 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
120 VAC 3" (77 mm)
Drain port 4-7/8" (124 mm)
HOT 6-3/4" (171 mm)
RETURN 3-1/8" (79 mm)
7-1/2" (189 mm)
COLD 5/8" (17 mm)
7-1/2" (189 mm)
17-3/4" (450 mm)
6-1/4" (159 mm)
7" (180 mm)
Φ 4" (102 mm)
15" (381 mm)
Φ 4" (102 mm)
FemaleFemale
23-5/8" (600 mm)
24-7/8" (631 mm)
RETURN 4-5/8" (117 mm)
GAS 5-1/8" (131 mm)
HOT 6-1/2" (164 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
Drain port 6-1/4" (159 mm)
120 VAC 3-7/8" (174 mm)
7-7/8" (199 mm)
11-1/4" (285 mm)
5-3/4" (147 mm)
Exhaust 2-5/8" (65 mm)
Intake 2-5/8" (68 mm)
RETURN 4-5/8" (117 mm)
GAS 5-1/8" (131 mm)
HOT 6-1/2" (164 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
1/2 (13 mm)
Drain port 6-1/4" (159 mm)
120 VAC 3-7/8" (174 mm)
7-7/8" (199 mm)
120 VAC 3" (77 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
Drain port 4-7/8" (124 mm)
HOT 6-3/4" (171 mm)
RETURN 3-1/8" (79 mm)
5-3/4" (147 mm)
6-1/4" (159 mm)
17-5/8" (448 mm)
540P Indoor (AT-H3P-DV)
COLD 5/8" (17 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
120 VAC 3" (77 mm)
Drain port 4-7/8" (124 mm)
HOT 6-3/4" (171 mm)
RETURN 3-1/8" (79 mm)
7-1/2" (189 mm)
COLD 5/8" (17 mm)
7-1/2" (189 mm)
17-3/4" (450 mm)
6-1/4" (159 mm)
7" (180 mm)
Φ 4" (102 mm)
15" (381 mm)
Φ 4" (102 mm)
FemaleFemale
23-5/8" (600 mm)
24-7/8" (631 mm)
RETURN 4-5/8" (117 mm)
GAS 5-1/8" (131 mm)
HOT 6-1/2" (164 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
Drain port 6-1/4" (159 mm)
120 VAC 3-7/8" (174 mm)
7-7/8" (199 mm)
11-1/4" (285 mm)
5-3/4" (147 mm)
Exhaust 2-5/8" (65 mm)
Intake 2-5/8" (68 mm)
RETURN 4-5/8" (117 mm)
GAS 5-1/8" (131 mm)
HOT 6-1/2" (164 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
1/2 (13 mm)
Drain port 6-1/4" (159 mm)
120 VAC 3-7/8" (174 mm)
7-7/8" (199 mm)
120 VAC 3" (77 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
Drain port 4-7/8" (124 mm)
HOT 6-3/4" (171 mm)
RETURN 3-1/8" (79 mm)
5-3/4" (147 mm)
6-1/4" (159 mm)
17-5/8" (448 mm)
540P Indoor (AT-H3P-DV)
Model Number
Clearances (inches)
Top Bottom Side Front
ATI-540P-N 12 12 3 4
ATO-540P-N 36 12 3 24
Isolation Valves
(100112255)
16