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ENVIRONMENTALLY FRIENDLY TECHNOLOGY SUPER ABSORPTION
The DE direct-fired chiller/heaters are equipped with a nozzle mix burner.
The burners are capable of firing with natural gas.
The burner is factory wired and tested prior to shipment. Manual modula-
tion from low fire to high fire during startup and routine maintenance pro-
cedures is provided by an operation switch in the chiller control panel.
Burner description
The burner maximizes flame retention at all capacity ranges of modula-
tion, thus ensuring long life and efficient operation.
The following drawing illustrates some of the common components found
in a typical gas train and unit installation. Individual jobs may vary de-
pending on chiller size and specific application.
Gas train
Figure 31. Typical burner and gas train
12
11
13
9
14
54 76
8
GAS
1 2 3
P
Air
P
Parts name.
Ball valve
Pressure gauge with push button valve
Gas filter
Low pressure governor
Gas pressure switch
Double solenoid valve (DMV)
Gas butterfly valve
Valve proving system (VPS)
Solenoid valve for ignition gas
Blower
Air pressure switch1
Air damper
Burner
symbol
Model No.
Gas burner
Natural gas
Model
Kerosene / light oil
Model
Natural gas & kerosene
Model
Natural gas & heavy oil
Model
Heavy oil
Model
Oil burner Dual fuel (combination) gas / oil burner
G1 ZMD --- --- RGL3 ZMD ---
G3 ZMD RL3 ZMD --- RGL3 ZMD ---
G3 ZMD RL3 ZMD --- RGL3 ZMD ---
G3 ZMD RL3 ZMD --- RGL3 ZMD ---
G5 ZMD RL3 ZMD --- RGL5 ZMD ---
G5 ZMD RL5 ZMD --- RGL5 ZMD ---
G5 ZMD RL5 ZMD --- RGL5 ZMD ---
G7 ZMD RL5 ZMD RMS 7 ZMD RGL7 ZMD RGMS7 ZMD
G7 ZMD RL7 ZMD RMS 7 ZMD RGL7 ZMD RGMS7 ZMD
G7 ZMD RL7 ZMD RMS 7 ZMD RGL7 ZMD RGMS7 ZMD
G7 ZMD RL7 ZMD RMS 7 ZMD RGL7 ZMD RGMS7 ZMD
G7 ZMD RL7 ZMD RMS 7 ZMD RGL7 ZMD RGMS7 ZMD
G8 ZMD RL7 ZMD RMS 8 ZMD RGL8 ZMD RGMS8 ZMD
G8 ZMD RL8 ZMD RMS 8 ZMD RGL8 ZMD RGMS8 ZMD
G9 ZMD RL8 ZMD RMS 9 ZMD RGL9 ZMD RGMS9 ZMD
G9 ZMD RL8 ZMD RMS 9 ZMD RGL9 ZMD RGMS9 ZMD
G9 ZMD RL8 / 2 ZMD RMS 9 ZMD RGL9 ZMD RGMS9 ZMD
G9 ZMD RL8 / 2 ZMD RMS 10 ZMD RGL9 ZMD RGMS10 ZMD
G10 ZMD RL9 ZMD RMS 10 ZMD RGL10 ZMD RGMS10 ZMD
G10 ZMD RL10 ZMD RMS 11 ZMD RGL10 ZMD RGMS11 ZMD
G11 ZMD RL10 ZMD RMS 11 ZMD RGL11 ZMD RGMS11 ZMD
G11 ZMD RL10 ZMD RMS 11 ZMD RGL11 ZMD RGMS11 ZMD
G11 ZMD RL11 ZMD RMS 50 / 2 ZMD RGL11 ZMD RGMS50 / 2 ZMD
DE-11
DE-12
DE-13
DE-14
DE-21
DE-22
DE-23
DE-24
DE-31
DE-32
DE-41
DE-42
DE-51
DE-52
DE-53
DE-61
DE-62
DE-63
DE-71
DE-72
DE-73
DE-81
DE-82
Table 9. Gas train
Table 8. Burner model