Bradford White RE2H50S 1NCTT Series Installation/Operation Instruction Manual page 19

Electrical Connections cont.-
Branch Circuit Sizing Guide
Total Water
Protection (fuse or circuit breaker
Heater Wattage
208V
3,000 20
4,000 25
4,500 30
5,000 30
5,500 35
6,000 40
8,000 50
9,000 -
10,000 -
11,000 -
12,000 -
Installation Checklist
Tank location:
1.
Does room size require a louvered door, ducting kit, or similar ventilation? 10 ft x 10 ft x 7 ft or
–
700 ft 3 (19.8 m
7 in (17.5 cm) clearance at the rear of the unit and at least 7 in (17.5 cm) clearance around the
–
sides of the unit. 6 in (15.2 cm) clearance for earthquake strap installations, with additional
clearance on the opposite side of the unit).
Front of unit is free and clear.
–
Is the water heater level? If no, add shims under the base of the unit to ensure proper function of
–
sensors.
2. Verify Air Filter is installed (located in packaging).
3. Plumbing connections:
Ensure that air filter removal is not prevented.
–
Check for leaks after filling the tank with water, when water is or isn't flowing.
–
Condensate lines are in place:
4.
Main flexible or rigid drain line must be installed and directed to a drain or condensate pump.
–
Reducer fittings are not recommended.
Temperature and pressure-relief valve is working and drain line completed per local code.
5.
6. Electrical:
Verify 208/240 VAC to L1 and L2 at tank.
–
Ensure that the electrical connection does not prevent air filter removal.
–
7. Verify that the control panel displays 120ºF (49ºC) in Hybrid Mode. Assist user in how to adjust
temperature and modes (see "Water Temperature Adjustment" section).
Recommended Over-Current
amperage rating)
240V 277V
20 15
25 20
25 25
30 25
30 25
35 30
45 40
50 45
- 50
- 50
- -
3 ), or 240 in 2 (0.15 m²) open air-flow area needed.
Total Water
Heater Wattage
480V
3,000
15
4,000
15
15 4,500
5,000
15
5,500
15
6,000
20
8,000
25
9,000
25
10,000
30
11,000
30
12,000
35
Copper Wire Size AWG Based on
N.E.C. Table 310-16 (167ºF/75ºC.)
208V 240V 277V
12 12 14
10 10 12
10 10 10
10 10 10
8 10 10
8 8 10
8 8 8
- 8 8
- - 8
- - 8
- - -
480V
14
14
14
14
14
12
10
10
10
10
8
19