Raypak 207A Betriebsanleitung PDF herunterladen (Seite 20)

GAS PRESSURE REGULATOR

The gas pressure regulator is preset at 4.0 in. WC for

natural gas (3.1 in. WC for Lo NOx), and 10.5 in. WC.

for propane gas. The pressure at the gas valve, taken

with a manometer, should be about 4.0 in. WC natural

gas (3.1 in. WC for Lo NOx) and 10.5 in. WC propane

gas. If an adjustment is needed, remove seal and turn

adjustment screw clockwise to increase pres-

ure or counter-clockwise to decrease pressure.

NOTE: Lo NOx gas valves are non-adjustable; set-

tings are fixed by the manufacturer

(Invensys/Robertshaw).

GAS PRESSURE ADJUSTMENT LOCATIONS

MILLIVOLT GAS VALVES

ELECTRONIC IGNITION GAS VALVES

Gas Pressure

Adjustment

Gas Pressure

Adjustment

Robertshaw 7000

(Heater Models 206-406)

Honeywell VR8304

(Heater Models 206-

406 and 207-407)

ELECTRONIC IGNITION GAS VALVES-CONTINUED

Gas Pressure

Adjustment

Robertshaw 7200

(Heater Model 206)

Robertshaw 7000 BDER

(Heater Models 266-336)

Gas Pressure

Adjustment

Robertshaw 7000 DERHC

(Heater Model 406)

PIPE SIZING FOR GAS CONNECTIONS

Robertshaw 7000 BDERF

(Heater Models 207-407)

Non-Adjustable

Gas Valve

Maximum Equivalent Pipe Length (ft)

Natural Gas 1000 BTU/FT

0.60

Specific Gravity @ 0.5 in. WC Pressure Drop

Propane Gas 2500 BTU/FT

1.53

Specific Gravity @ 0.5 in. WC Pressure Drop

3/4” 1” 1-1/4” 1-1/2”

Model N P N P N P N P

206/207 25 60 90 215 360

266/267 15 35 50 125 210 480 445

336/337 10 20 30 80 140 320 290

406/407 * 15 20 55 95 225 215 480

MANUAL

SHUT-OFF

VALVE

UNION

MANOMETER

GAS PRESSURE TEST

AT GAS VALVE

*A 3/4” gas line can be used for up to 5 ft maximum length from the

gas valve in addition to the sediment trap.

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