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Document: GFH-NT 1500-4000 IM 14 DEC 2016
Gas Fired Heater Instructions
©2016 NOVATEC, Inc. All Rights Reserved
1.5 INSTRUMENT SETTINGS AND DATA
DESCRIPTION
GFH-1500
GFH-1750
Combustion High Temp Limit Switch (deg. F)
600
600
Process High Temp Limit Switch (deg. F)
400
400
Main Gas regulator Pressure (“WC)
20-28
20-28
Pilot Gas Regulator Pressure (“WC)
12-14
12-14
Pilot Flame Signal Strength (VDC)
5.0-11.0
5.0-11.0
Main Flame Signal Strength (VDC)
5.0-11.0
5.0-11.0
Purge Time (seconds)
60
60
Trial for Ignition Time (seconds)
10
10
Combustion Blower SP, LF, @ Tap A (“WC)
9.0
7.0
Combustion Blower SP, HF, @ Tap A (“WC)
11.5-12.5
11.5-12.5
Gas S
P, LF, @ Tap B (“WC)
6.5-8.0
6.5-8.0
Gas SP, HF, @ Tap B (“WC)
9.5-12.5
9.5-12.5
Low Gas Pressure Switch (“WC)
16
16
High Gas Pressure Switch (“WC)
36
36
Combustion Air Proof Switch (APS) (“WC)
2.0
6.0
Process Blower Off Delay Timer (minutes)
2.0
2.0
DESCRIPTION
GFH-2000
GFH-2500
Combustion High Temp Limit Switch (deg. F)
600
600
Process High Temp Limit Switch (deg. F)
400
400
Main Gas regulator Pressure (“WC)
20-28
20-28
Pilot Gas Regulator Pressure (“WC)
12-14
12-14
Pilot Flame Signal Strength (VDC)
5.0-11.0
5.0-11.0
Main Flame Signal Strength (VDC)
5.0-11.0
5.0-11.0
Purge Time (seconds)
60
60
Trial for Ignition Time (seconds)
10
10
Combustion Blower SP, LF, @ Tap A (“WC)
7.0
9.0
Combustion Blower SP, HF, @ Tap A (“WC)
11.5-12.5
11.5-12.5
Gas SP, LF, @ Tap B (“WC)
6.5-8.0
7.0-8.0
Gas SP, HF, @ Tap B (“WC)
9.5-12.5
10.5-13.5
Low Gas Pressure Switch (“WC)
16
16
High Gas Pressure Switch (“WC)
36
36
Combustion Air Proof Switch (APS) (“WC)
6.0
6.0
Process Blower Off Delay Timer (minutes)
2.0
2.0
