Gas Supply - Rheem Raypa DELTA 399B Installation And Operation Manual

Potable Water and Space Heating
ACAUTION: When this heater is used for both
potable water and space heating, observe the
following to ensure proper operation.
1. All piping materials and components connected to
the water heater for the space heating application
shall be suitable for use with potable water.
2. Toxic chemicals, such as used for boiler treatment,
shall not be introduced into the potable water used
for space heating.
3. If the heater will be used to supply potable water,
it shall not be connected to any heating system or
components previously used with a non-potable
water heating appliance.
4. When the system requires water for space heating
at temperatures higher than 140°F, a means such
as a mixing valve shall be installed to temper the
water in order to reduce scald hazard potential.
Soft (0–4 grains per gallon)
Model
GPM
No.
∆T
(lpm)
40
399B
17
(151)
40
499B
21
(151)
40
649B
28
(151)
42
749B
30
(159)
51
899B
30
(193)
60
989B
28
(227)
72
1259B
30
(272)
86
1529B
30
(325)
101
1799B
30
(382)
112
1999B
30
(424)
116
2069B
30
(439)
132
2339B
30
(500)
∆T = Temperature rise, °F.
∆P = Pressure drop through heat exchanger, ft.
SHL = System head loss, ft. (System head loss based on heater and tank placed no more than 5 ft apart and equivalent length pipe/fittings as follows:
2 in. tube = 25 ft; 2 1/2 in. tube = 80 ft.
gpm = Gallons per minute, flow rate.)
MTS = Minimum tubing size.
*Must utilize optional cupronickel tubes.
**With Hard Water (16-25 grains per gallon), the operating control must be set no higher than 130F for scale free operation. For operating tempera-
tures above 130F, a water softener must be utilized.
18
MTS
∆P SHL ∆T
in. (mm)
2
2.0 4.4 13
(51)
2
2.1 4.5 16
(51)
2
2.2 4.6 20
(51)
2
2.6 5.2 20
(51)
2
3.9 7.6 20
(51)
2.5
2.7 4.6 20
(64)
2.5
4.4 7.0 20
(64)
2.5
7.1 10.7 20
(64)
2.5
10.7 15.5 23
(64)
2.5
13.9 19.7 26
(64)
2.5
14.8 21.0 27
(64)
2.5
21.4 29.3 30
(64)
Table H: Domestic Water Heater Flow Rate Requirements
Fig. 13: Single Domestic Hot Water Heater and Storage
Tank

Gas Supply

ADANGER: Make sure the gas on which the
heater will operate is the same type as specified
on the heater's rating plate.
Medium (5–15 grains per gallon)
GPM MTS
∆P
(lpm) in. (mm)
52 2
3.4
(197) (51)
52 2
3.5
(197) (51)
55 2
4.1
(208) (51)
63 2
5.7
(238) (51)
76 2
8.4
(288) (51)
83 2.5
5.2
(314) (64)
106 2.5
9.6
(401) (64)
132 2.5
16.5
(500) (64)
132 2.5
18.3
(500) (64)
132 2.5
19.0
(500) (64)
132 2.5
19.0
(500) (64)
132 2.5
21.4
(500) (64)
Hard* (16–25** grains per gallon)
GPM
SHL ∆T ∆P
(lpm)
90
7.2 8 10.0
(341)
90
7.4 9 10.4
(341)
90
8.4 12 10.8
(341)
90
11.1 14 11.3
(341)
90
16.1 17 11.7
(341)
132
8.6 13 13.1
(500)
132
14.8 16 14.8
(500)
132
24.4 20 16.5
(500)
132
26.1 23 18.3
(500)
132
26.9 26 19.0
(500)
132
26.9 27 19.0
(500)
132
29.3 30 21.4
(500)
MTS
SHL
in. (mm)
2
20.5
(51)
2
20.9
(51)
2
21.3
(51)
2
21.8
(51)
2
22.2
(51)
2.5
21.0
(64)
2.5
22.7
(64)
2.5
24.4
(64)
2.5
26.1
(64)
2.5
26.9
(64)
2.5
26.9
(64)
2.5
29.3
(64)