Pipe Sizing Chart/Propane 2 Stage Regulation; Regulated Manifold Pressure Test - Pentair Hot Tub User Manual

Installation (contd.)
Pipe Sized For Length Of Run In Equivalent Feet, (cont'd.)
In many "RESIDENTIAL" Propane gas line installations, the gas supplier and or installer will utilize a two stage regulation
process where by at the supply tank they will install the first stage gas regulator, which would be at a higher pressure, usually
10 psi and can be for longer distance and in a smaller pipe size. Then within a short distance from the heater they will install
a second regulator, which is the second stage, and this would be set at the required inlet pressure of 11 inches of W.C. for all the
Pentair Pool Heaters.
S a t e g O e n " i H h g P
M A X M I U M E Q I U
M d o l e 0 o t 0 5 e F
5 7 & 1 0 0 1 2 / . n i
1 0 5 1 2 / . n i
2 0 0 1 2 / . n i
2 0 5 1 2 / . n i
3 0 0 1 2 / . n i
3 0 5 1 2 / . n i
4 0 0 1 2 / . n i

REGULATED MANIFOLD PRESSURE TEST

1. Attach the manometer to the heater jacket.
2. Shut off the main gas valve.
3. Remove 1/8 in. NPT plug on the outlet side of
the valve and screw in the fitting from the
manometer kit.
4. Connect the manometer hose to the fitting.
5. Fire the heater.
6. The manometer must read 4 in. WC for natural
gas, 11 in. WC for propane gas, while the heater
is operating.
7. For adjustment, remove the Regulator
Adjustment Cap and using a screwdriver turn the
screw clockwise to increase - counterclockwise
to decrease gas pressure.
CAUTION
The use of Flexible Connectors (FLEX) is NOT
recommended as they cause high gas pressure drops.
Rev. E 11-5-07
PROPANE 2 STAGE REGULATION
e r s s r u " e G s a i P e p S i z i g n
A V E L N T P P I E E L N G T H
t e 0 5 o t 1 0 0 e F t e 1 0 0 o t
1 2 / . n i 1 2 /
1 2 / . n i 1 2 /
1 2 / . n i 1 2 /
1 2 / . n i 1 2 /
1 2 / . n i 1 2 /
1 2 / . n i 1 2 /
1 2 / . n i 1 2 /
S a t e g
M
M d o
1 0 5 e F t e
5 7 &
. n i
1
. n i
2
. n i
2
. n i
3
. n i
3
. n i
4
. n i
Table 8.
Figure 11.
®
MINIMAX CH GAS PRESSURE REQUIREMENTS*
Maximum inlet gas pressure
Minimum inlet gas pressure
Normal manifold pressure
** 6 WC for 400 model
*All Readings are taken with the heater fired. Any adjustments
made with heater off will give incorrect readings.
Table 10.
w T o " o L w P e r s s r u " e G s a
A X M I U M E Q I U A V E L N T P P I E E L
l e 0 o t 0 1 e F t e 0 1
1 0 0 1 2 / . n i
0 5 1 2 / . n i
0 0 1 2 / . n i
0 5 1 2 / . n i
0 0 3 4 / . n i
0 5 3 4 / . n i
0 0 3 4 / . n i
REGULATOR
ADJUSTMENT CAP
PILOT
HONEYWELL
1/2 P.S.I.
PILOT
ADJ.
Natural
10 in. WC 14 in. WC
**5 in. WC 12 in. WC
4 in. WC 11 in. WC
13
i P e p S i z i g n
N G T H
o t 0 2 e F t e
1 2 / . n i
1 2 / . n i
3 4 / . n i
3 4 / . n i
3 4 / . n i
3 4 / . n i
3 4 / . n i
Table 9.
PRESS
TAP
Propane
P/N 472128