Flow Rates - Rheem Raypak AVIA 264 Installation And Operation Manual

MANUAL
SHUTOFF
VALVE
UNION
Figure 14. Manual Shutoff Valve Installation
Gas Pressure Adjustment Locations
CAP
ADJUSTMENT SCREW INSIDE
CLOCKWISE TO INCREASE
GAS VALVE
MANIFOLD
PRESSURE TAP
Figure 15. Gas Valve Adjustment
Pipe Sizing for Gas Connection
The capacities shown below are based on using SCH
40 black iron pipe. For capacities using other materials,
consult local codes.
Maximum Equivalent Pipe Length
Natural Gas 1000 BTU/FT³ 0.60 Specific Gravity @ 0.5 in.
WC Pressure Drop
Propane Gas 2500 BTU/FT³ 1.53 Specific Gravity @ 0.5 in
WC Pressure Drop
Size 3/4" Size 1"
Model
No.
NAT PRO NAT PRO NAT
15 35 50
264
(4.6) (10.7) (12.2) (38.1)
15 20
404 *
(4.6) (8.8) (16.8)
* A 3/4" gas line can be used for up to 5' (1.5 m) maximum length from
the gas valve in addition to the sediment trap.
Table L.
F10817
SUPPLY PRESSURE
TAP ON INLET SIDE
ft (m)
Size 1-1/4" Size 1-1/2"
PRO NAT
125 210 480 445
(64.0) (146.3) (135.6)
55 95 225 215
(29.0) (68.6) (65.5)
Gas Pipe Sizing
Gas Regulator Best Practices
From the gas pressure regulator, it is recommended to
have no less than 10 pipe diameters of straight smooth
pipe downstream of the regulator discharge and to have
no less than 10 linear feet (not including fittings) between
the regulator and the inlet to the appliance for proper
operation.

Flow Rates

Model
264/404
* When flow rates exceed maximum GPM an external auxiliary bypass
valve is required. See External Bypass Valve Section on page 21
for details.
Table M. Min/Max Flow Rates
Flow
GPM (lpm)
40 (151)
50 (189)
60 (227)
70 (265)
80 (303)
90 (341)
100 (379)
PRO
Table N.
NOTE: Table capacity is based on 2" Schedule 40 piping.
280
(85.3)
Pipe Size
Min. GPM (lpm) Max. GPM (lpm)
in. (mm)
2 (50.8) 40 (151)
Figure 16. Water Flow
Pressure Drop
Ft. of Head (m of Head)
264
7.2 (2.2)
10.0 (3.1)
12.6 (3.8)
17.0 (5.2)
24.0 (7.3)
30.3 (9.2)
36.0 (10.9)
Heat Exchanger Pressure Drops
100 (379)
F10818
404
13.4 (4.1)
16.5 (5.0)
19.5 (5.9)
23.7 (7.2)
28.3 (8.6)
33.2 (10.1)
37.0 (11.3)
19