16
Cold Water Run
Cold water run differs from cold water start in that the
system water entering the heater remains below 105ºF
(41ºC) continuously. Typically, this is the case in swim
-
ming pool heating and water source heat pump appli-
cations as well as some others. If the system water is
kept in a narrow temperature range, a permanent man-
ual bypass can be employed and manually adjusted to
achieve an inlet temperature of 105ºF (41ºC) or high
-
er. An injector pump arrangement may also be utilized
to keep the heater loop at or above 105ºF (41ºC). An
injector pump approach has the added value of being
able to adjust to changes in the system water coming
back to the heater take-off.
Table G: Heater Rates of Flow and Pressure Drops
Notes: 1. Basis for minimum flow: Models 399
–
899, 20 gpm or 40°F ∆T. Models 989
–
2339, 30 gpm or 40°F ∆T.
Basis for maximum flow: Models 399
–899, 90 gpm. Models 989–2339, 132 gpm.
2. Flow switch will not operate if flow is less than 20 gpm.
Temperature & Pressure Gauge
The temperature and pressure gauge is factory-mount-
ed in the in/out header.
Hydronic Heating
Pump Selection
In order to ensure proper performance of your heater
system, you must install a correctly sized pump. Ray-
pak recommends using a 20°F ∆T as design ∆T. (∆T is
the temperature difference between the inlet and outlet
water when the heater is firing at full rate). If a ∆T of
larger than 20°F is necessary, see Table G and Table
H for flow rate requirements.
Model
No.
10°F ∆T
20°F ∆T
30°F ∆T
Min. Flow
Max. Flow
GPM
(lpm) ∆P (ft)
GPM
(lpm) ∆P (ft)
GPM
(lpm) ∆P (ft)
GPM
(lpm) ∆P (ft)
∆T
GPM
(lpm) ∆P (ft) ∆T
399B
67
(254)
5.5
34
(129)
1.4
22
(83)
0.6
20
(76)
0.5
34
90
(341)
10.0
7
649B
55
(208)
4.1
36
(136)
1.8
27
(102)
1.1
40
90
(341)
10.8
12
749B
63
(238)
5.7
42
(159)
2.6
32
(121)
1.5
40
90
(341)
11.3
14
899B
76
(288)
8.3
50
(189)
3.8
38
(144)
2.2
40
90
(341)
11.7
17
989B
83
(341)
5.2
55
(208)
2.3
42
(159)
1.3
40
132
(500)
13.1
13
1259B
106
(401)
9.6
71
(269)
4.3
53
(201)
2.4
40
132
(500)
14.8
16
1529B
129
(488)
15.7
86
(325)
7.1
64
(242)
4.0
40
132
(500)
16.5
19
1799B
101
(382)
10.7
76
(288)
6.0
40
132
(500)
18.3
23
1999B
112
(424)
13.8
84
(318)
7.9
40
132
(500)
19.0
25
2069B
116
(439)
14.8
87
(329)
8.5
40
132
(500)
19.0
26
2339B
132
(500)
21.4
98
(371)
12.1
40
132
(500)
21.4
30
Содержание Raypak Delta Limited 399B
Страница 23: ...23 Fig 21 2 Stage Wiring Connections Fig 22 3 Stage Wiring Connections Fig 23 4 Stage Wiring Connection...
Страница 39: ...39 Wiring Diagram Models 399B 1259B...
Страница 40: ...40 Wiring Diagram Models 1529B 2339B...
Страница 51: ...51 DIAGNOSTIC DETAIL 12 J 7 J 6 J 5 J 3 0 2 0 16 S 1 F 2 F 3 F 4 F BLOWER DETAIL...
Страница 53: ...53 13 J 8 J 10 J 11 J 4 J 2 J 3 J 6 C 14 J 9 J 1 J CONTROL BOX DETAILS...
Страница 57: ...57 ILLUSTRATED PARTS LIST MODELS 989B 2339B 10 J 3 O 5 O...
Страница 58: ...58 12 H 6 H 7 H 8 H 2 H 9 H 3 H 5 H 1 H 4 H 1 P HEAT EXCHANGER DETAILS BURNER ASSEMBLY DETAILS...
Страница 59: ...59 CONTROL BOX DETAILS 9 J 8 J 23 S 13 J 10 J 3 O 10 J 3 O 5 O FRONT SWITCH DETAILS...
Страница 66: ...66...
Страница 67: ...67 Raypak Inc 2151 Eastman Avenue Oxnard CA 93030 805 278 5300 Litho in U S A NOTES...
