Fulton Pulse HW (PHW) Fully Condensing Hydronic Boiler - Manual (Page 35)

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SECTION 2
PHW-IOM-2013-0214
INSTALLATION
2-29
2. Replace the plug with a 1/4 N.P.T. to 1/4” compression
(or fl are) adaptor and a short piece of tubing. Connect a
piece of rubber hose from the tubing to a manometer.
Open the gas shutoff valve (gas cock) and turn on
boiler.
3. Inlet Pressure for Natural gas fi red units should be a
minimum of 7” WC while running. Inlet pressure for
Propane should be a minimum of 11”WC while running.
See factory test fi re sheet for manifold operating
pressures.
To Correct Input – Adjust Gas Pressure Regulator
Perform the following:
1. Turn boiler off and remove cap from regulator. (Figure
22).
2. Turn adjusting screw clockwise to increase gas fl ow.
Turn adjusting screw counter-clockwise to decrease gas
fl ow.
3. Always replace cap before turning on boiler.
4. Regulator vent must terminate outdoors.
5. A fl ow restricting bleed valve shall not be used on the
regulator vent.
FIGURE 22 - REMOVING CAP FROM REGULATOR
Rating the Boiler
After the boiler has been operating for about 15 minutes,
check gas input rate to be sure boiler is operating at design
capacity.
To Check for High Gas Pressure
Adhere to the following:
1. The boiler and its individual shut-off valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.5 kPa).
2. Turn off boiler and turn off gas supply to manual
gas shutoff valve. Remove the pressure test plug on
manual shutoff gas valve. Replace with a 1/4” NPT to
1/4” compression (or fl ange) adaptor and a short piece
of tubing. Connect a piece of rubber hose from tubing
to a manometer.
3. Open gas supply to manual gas shutoff valve and turn
on boiler. After combustion starts, manometer should
read 7” WC (178mm) minimum for natural gas and 11”
WC (25mm) minimum for propane.
4. If reading exceeds 14” WC. (178mm) install regulator
upstream of gas valve to reduce pressure.
For High Gas Pressure Installations Using
Fisher Regulators
In high gas pressure areas, it is good practice to step the
pressure down as described below:
1. Locate the stepdown regulator as far away from the
Pulse boiler as possible. At a minimum, it should be 10
feet from boiler.
2. When stepping down from more than 5 psig to 14” WC,
the stepdown should be done in two steps:
Reduce the pressure to 5 psig
Reduce the pressure from 5 psig to 14” WC
3. The preferred stepdown regulator for this application is
manufactured by Fisher. Consult your Authorized Fulton
Representative for selection. This recommendation is
made to avoid regulator chatter. It is also recommended
to avoid high lockup pressures which can cause light off