Bradford White TW-55X-78B-3X - Manual (Page 2)

Mixed water supply temperature range
INTEGRATED MIXING DEVICE - IMD SPECIFICATIONS
100 - 145°F (38 - 63°C)
Water heater outlet temperature range 100 - 180°F (38 - 82°C)
Temperature differential
(between hot supply and outlet temperature)
Device temperature stability (nominal)
± 3°F (± 1.7°C) at 3 - 5 gpm (see note 1)
± 5°F (± 3.0°C) at 5 - 40 gpm (see note 1)
Cold water inlet temperature range 33 - 80°F (1 - 27°C)
Hydrostatic pressure 150 psi (1034 kPa) maximum
27°F (15°C) (see note 2)
± 10% (see note 3)
0.25 gpm (0.9 L/m)
19.2 gpm (72.0 L/m)
2.8 (mixed temp. of 95°F)
1.8 (mixed temp. of 120°F)
1.3 (mixed temp. of 140°F)
Permitted supply pressure variation
Flow rate (min)
Flow rate (max)
Cv
Notes:
1. As tested in accordance with ASSE 1017.
2. This is the minimum difference required between the mixed water supply temperature and the
water heater outlet temperature to enable the IMD to function correctly and ensure shut-off of
outlet flow in the event of cold supply failure.
3. Maximum permitted variation in either supply pressure in order to control the mixed water supply
temperature to within ± 3°F. Excessive changes in supply pressures may cause changes in
mixed water supply temperature.
Page 2
Table 1
5
10
20
30
40
50
60
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Flow (gpm)
P
re
s
su
re
D
ro
p
(p
si
)
Mixed Temperature
of 95°F
of 120°F of 140°F
Mixed Temperature Mixed Temperature