Page 18 | HEEGM Service Manual part# 4532502 (Rev 0)
6 COMPONENTS
(CONT.)
6.4 Gas Pressure Regulator & Gas Pressure
6.4.1 General Information
Gas pressure regulators have two main
purposes: to reduce supply main pressure to safe
operating pressures of connected appliances;
and to maintain constant downstream pressure,
regardless of changes in the gas flow or
upstream pressure variations.
Basics Of A Gas Pressure Regulator
Inlet
Outlet
At
m
ospheric
Re
m
ovable Seal Cap
Vent
Adjust
m
ent (Screw)
Loading Ele
m
ent
(Spring)
Measuring Ele
m
ent
(Diaphrag
m
)
Restricting Ele
m
ent
(Valve Disk and Seat)
i
i
i
i
IMPORTANT
There is a directional requirement for
gas pressure regulator. Ensure the
gas flows throw the regulator in the
correct direction.
i
IMPORTANT
Gas service suppliers usually supply gas pressure higher than the safe
operating pressures of connected appliances. Always refer to the rating
plates of appliance for the actual manifold pressure required.
6.4.2 HEEGM Gas Regulator Specific Information
•
The regulator supplied with the unit is rated for a maximum of ½ PSI (14” WC, 3.45kPa). If the
gas supply line pressure exceeds this maximum, a step down regulator is required and must be
installed in accordance with local codes.
•
The red air-vent cap is part of the regulator and should not be removed, unless local codes
require external venting. If external venting is required, install in accordance with local codes.
•
The pipe size is ¾” (19.05mm) NPT for all models.
•
To ensure optimal operation of this unit, it is recommended that the dynamic gas supply
pressure into the appliance regulator is a minimum of 1” WC higher than the pressure stated
on the rating plate.
6.4.3 Gas Regulator and Gas Pressure Adjustments
Problem with gas regulator and pressure would affect temperature and performance of the unit.
It is important to check if the problem is caused by defective parts, improper connections, or main
supply.
WARNING
Prior to replacing the regulator, disconnect electrical power and shut off
main gas supply to the unit.
DANGER
Be sure to check for gas leaks after installing a new regulator. Check all
gas connections for leaks using a soap solution. Do not use an open
flame to check for leaks.
Содержание HEEGM48CL
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