Roberts Gorden Combat Cabinet Heaters POP-ECA/PGP-ECA 015 to 0100 User Manual

Page 42

COMBAT

ABINET

EATERS

NSTALLATION

, C

OMMISSIONING

, O

PERATION

AND

ERVICE

ANUAL

Figure 15: Motor Starter (models 040 -100 and Thermal Overload (models 060 - 100)

Figure 16: Gas Train Circuit for Dungs Gas Valves (all models)

Line Connections

Load Connections

Contactor

Thermal
Overload

Overload
Reset Button

Overload
Connection

Overload Scale
(motor current amps)

Overload
Adjusting Level

Wire Connecting
Overload Switch to Coil

Models 15 to 30 - All types of valve

Models 40 to 100 - All types of valve

To Burner

Burner

Flange

Union

Automatic
Gas Valve &
Regulator

Gas
Inlet

Automatic
Gas Valve

Automatic
Gas Valves

1 = Start Gas
2 = Main Gas

TP1

TP2

TP3

TP1 = Inlet Pressure
TP2 = Pressure between Main Gas Valves
TP3 = Valve Outlet Pressure
Burner Pressure TP on Burner

NOTE: Orifice plate
fitted into union
between valve and
burner where required.

NOTE: Orifice plate
fitted into union
between valve and
burner for models
40/50, and burner flange
for models 60 and over.

Regulator