5
INSTALLATION AND OPERATION INSTRUCTIONS
BT INDIRECT SERIES – WATER HEATERS
MODEL
TANK
CAPACITY
DIMENSIONS
PIPING CONNECTIONS NPT REGULATION
CONNECTION
RELIEF VALVE
CONNECTION
APPROX.
SHIPPING
WEIGHT
USG
HEIGHT
INCHS
DIAMETER
INCHES
DOMESTIC
WATER IN/
OUT INCHES
BOILER
WATER IN/
OUT
INCHES
INCHES
LBS
BTI 30
26.7
39.6
20.0
3/4
1
N/A
3/4
50.7
BTI 40
39.9
47.0
21.4
3/4
1
N/A
3/4
66.2
BTI 55
56.5
62.8
21.4
3/4
1
N/A
3/4
91.5
BTI 65
64.5
70.3
21.4
3/4
1
N/A
3/4
97.5
BTI 80
79.9
70.0
23.8
1
1-1/2
3/4
3/4
118.0
BTI 80-MAX
79.9
70.0
23.8
1
1-1/2
3/4
1
141.1
BTI 119-MAX
114.6
65.75
28.9
1-1/2
1-1/2
3/4
1
177.5
Table 1: Dimensions and Capacities. Maximum Allowable Working Pressure – 150 psi, Hydrostatically tested to 300 psi.
Figure 1: Standard Unit - Dimensions and Connections
MODEL
MAX. FIRST HOUR RATING
US GAL/HR @ 135°F
CONTINOUS RATING
US GAL/HR @ 135°F
BOILER OUTPUT
REQUIRED BTU/HR
BOILER WATER
FLOW GPM
PRESSURE DROP
THROUGH COIL
(FT. WATER)
BASED ON 180°F BOILER SUPPLY AND 58°F ENTERING COLD WATER
BTI 30
159
137
88,000
8
3
BTI 40
188
156
100,000
8
3
BTI 55
200
156
100,000
8
3
BTI 65
325
269
172,000
13
4
BTI 80
239
171
109,000
10
3
BTI 80-MAX
453
393
251,000
15
7
BTI 119-MAX
482
393
251,000
15
7
Table 2: Ratings
