Download Rinnai 37AHB SERIES Specifications

UNIT
SIZE
Rinnai Corporation Hydronic Furnace (37AHB) Manual
TAP 4
(L)
TAP 3
(ML)
TAP 2
(MH)
TAP 1
(H)
ECM
SPEED
TAP
EWT (OF)
160
150
140
160
150
140
130
160
150
140
2.5
160
150
140
130
120
AHB75 + RC98HPi(e)
3.0
130
120
AHB75 + RC98HPi(e)
3.5
120
AHB75 + RC98HPi(e)
4.0
130
120
AHB75 + RC98HPi(e)
SUPPORTS
COOLING CAP.
RANGE (TONS)
NET
HEATING
CAPACITY
(MBH)
NET
HEATING
CAPACITY
(MBH)
NET
HEATING
CAPACITY
(MBH)
NET
HEATING
CAPACITY
(MBH)
NOMINAL
HEATING
CAPACITY
0.1
0.2
0.3
0.5
0.6
AIRFLOW (CFM)
0.4
0.7
0.8
0.9
in. W.C.
1.0
88.0
78.6
67.7
58.8
49.3
86.4
77.1
66.5
57.7
48.4
84.7
75.7
65.2
56.6
47.4
81.5
72.8
62.7
54.5
45.6
80.2
71.6
61.7
53.6
44.9
AIRFLOW (CFM)
83.3
74.3
64.1
55.6
46.6
78.8
70.4
60.7
52.7
44.1
77.4
69.1
59.6
51.7
43.3
75.5
67.5
58.1
50.5
42.3
74.1
66.1
57.0
49.5
41.5
87.4
78.1
68.5
58.2
50.1
85.5
76.3
67.0
56.9
49.0
83.5
74.6
65.4
55.6
47.8
80.1
71.5
62.7
53.3
45.9
78.2
69.9
61.3
52.1
44.8
AIRFLOW (CFM)
81.9
73.2
64.2
54.5
46.9
76.3
68.2
59.8
50.8
43.7
70.6
63.0
55.3
46.9
40.4
72.6
64.8
56.9
48.3
41.6
70.2
62.7
55.0
46.7
40.2
88.9
78.9
69.9
59.0
50.1
86.9
77.2
68.4
57.7
49.0
84.3
74.9
66.3
56.0
47.6
79.6
70.7
62.6
52.9
44.9
82.1
73.7
64.5
53.3
47.4
78.9
70.8
62.0
51.2
45.5
73.9
76.6
71.4
64.1
56.1
46.4
41.2
68.1
61.1
53.5
44.2
39.3
65.8
59.0
51.7
42.7
38.0
979
63.0
56.5
49.5
40.9
36.3
937
74.5
66.1
58.6
49.4
42.0
59.6
53.5
46.8
38.7
34.4
887
71.8
63.7
56.4
47.7
40.5
55.7
50.0
43.8
36.2
32.2
829
70.1
62.2
55.1
46.5
39.5
52.2
46.9
41.0
33.9
30.1
777
67.9
60.3
53.4
45.1
38.3
TBD
See Note
28 6.
TBD
See Note
35 6.
28
35
TBD
See Note
28 6.
TBD
See Note
35 6.
TBD
See Note
23 6.
TBD
See Note
28 6.
TBD
See Note
35 6.
Minimum Legs @ Optimal Legs @ Maximum legs @
60 CFM/Leg
50 CFM/Leg
40 CFM/Leg
TBD
See Note
23 6.
Minimum Legs @ Optimal Legs @ Maximum legs @
50 CFM/Leg
40 CFM/Leg
60 CFM/Leg
23
Minimum Legs @ Optimal Legs @ Maximum legs @
50 CFM/Leg
40 CFM/Leg
60 CFM/Leg
TBD
See Note
23 6.
Minimum Legs @ Optimal Legs @ Maximum legs @
60 CFM/Leg
50 CFM/Leg
40 CFM/Leg
Number of 3" Diameter Branch Legs applicable to High
Velocity Systems Only. Used only if methods other
than Table 3 is used to determine duct sizes.
6. Number of 3” diameter legs specified in table above is for rating point only (i.e. at External Static Pressure of 0.5
in. wc. and speed TAP3, TAP1, TAP2 , TAP2 for AHB45, AHB60, AHB75, AHB90 respectively). Final leg count is
to be determined by the installing contractor and is to be based on the following formula:
NUMBER OF LEGS = TOTAL AVAILABLE CFM (AT THE SPECIFIC ESP) / DESIRED CFM per LEG (40, 50, or 60 CFM)
Example: Given the design point for AHB045 of 0.8 ESP, Low fan speed (Tap5). From table 5.0, available CFM is
569 and the desired CFM per leg is 50 CFM. Therefore, Number of Legs = 569/50 = 11.38 rounded down to 11.
66.3
58.1
48.0
42.7
68.7
60.2
49.7
44.2
77.0
68.4
60.6
51.2
43.4
AIRFLOW (CFM)
82.0
72.8
64.5
54.4
46.2
1222 1174 1140 1100 1063 1014
91.6
81.3
72.0
60.8
51.6
1391 1350 1320 1281 1245 1209 1170 1131 1090 1064 1031
89.5
80.0
70.2
59.6
51.3
1561 1524 1490 1456 1428 1396 1364 1330 1230 1265 1224
89.8
80.2
69.1
60.0
50.3
1700 1666 1635 1604 1576 1543 1518 1492 1465 1430 1402
0
External Static Pressure (ESP)
TABLE 5.4: AIR DELIVERY AND PERFORMANCE DATA (BOTTOM OR SIDE RETURN w/ FACTORY SUPPLIED FILTER)
NOTES:
1. EWT - Entering Water Temperature (F).
2. CFM - Airflow in (Cubic Feet per Minute).
3. Legs - 3 inch diameter flexible ducts to diffusers.
4. 1 MBH = 1000 BTU/H.
5. Shaded box represents rating point; refer to wiring diagram for factory set speed taps.
37AHB07514KA5 + REU-KA3237FFUD(WD)-US
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