AER Esteem 399 User manual

GF-125U
Instruction
No.
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User’s
Manual
Esteem 399
Low NOx
Gas Fired
Boiler
Visit www.aerco.com to View the Latest
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3ULQWHGLQ86$ REVISED MAY 2010
OMM-0050_0A

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Contents
Warnings and Cautions 1
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Chapter 1 Combustion Air 3
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Chapter 2 Maintenance Schedule 4
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Chapter 3 Maintenance Procedures 5
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Chapter 4 Operating Instructions 9
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Chapter 5 BOILER CONTROL DISPLAY 11
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Appendix A: Replacement Parts 15
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Installers and operating personnel
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regulations.
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STANDBY, no demand for heat
Fan prepurge (10 seconds) or post purge cycle
Ignition sequence
Burner ON for space heating (CH)
Burner ON for domestic water heating (DHW)
Pre-check for air flow prior to prepurge cycle
Burner OFF due to reaching supply
temperature set point
Post pump cycle for domestic hot water
(30 seconds)
Post pump cycle for primary space heating
(1 minute)
Burner blocked:
Supply temperature too high (202 F) .Burner will
remain OFF until outlet temperature drops
below 200 F
Return temperature too high (202 F). Burner
will remain OFF until temperature drops
below 200 F
Return temperature is measured higher than
supply temperature. Burner will remain OFF
until corrected.
Supply temperature increased too quickly.
Burner will remain OFF for a 10 minute period.
Burner will recycle, increasing waiting period 1
minute for a max. 15 minutes
Factory supplied LWCO pressure device or
external limit (terminals 15 & 16) is OPEN.
Burner off for 150 seconds, auto reset.
0
1
180
180
180
180
180
180
180
180
180
180
2
3
4
5
6
7
8
9
18
b
19
b
24
b
25
b
26
b
2
Display Boiler function
No blower signal
Blower signal present, Burner will remain OFF
until condition terminates
Short circuit measured across optional DHW
temperature sensor terminals
Open circuit measured across optiona DHW
temperature sensor terminals.
Open circuit measured across the flue
temperature sensor.
Flue temperature greater than 240 F less than
250 F. Burner off for 150 seconds
Wait for the blower to start
8
b
29
b
33
b
Temperature rise between the supply and return
is more than 72 F. Burner will remain OFF for 150
seconds. Burner will recycle increasing wating
period 1 minute each cycle for a max. 20 cycles.
30
b
35
b
Short circuit measured across flue temperature
sensor terminals. Burner OFF until corrected.
35
b
40
b
52
b
65
b
2
Chapter 5 BOILER CONTROL DISPLAY
*)8

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Domestic Hot Water Setting (See Note 1)
DHW Application Selection (See Note 2)
CH Application Selection (See Note 3)
CH Maximum Boiler Operating Setpoint
1.
2
140
01
01
8
16
3
4
.
.
.
.
STEP
STEP
STEP
STEP
Key: Display Description of parameters
Setting Boiler Parameters
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MODE
Key: Display
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*)8

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DISPLAY DIGIT
SEGMENTS
Information Mode Items
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*)8

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Gas valve harness not properly connected
Failed ignition after 5 attempts
Power supply lost after lockout occured
Internal control failure
Internal control failure
E
E
02
03
04
08
09
E
E
E
Display Hard Lockout
Internal control failure
05
EInternal control failure
06
EInternal control failure
07
E
Flame detected prior to burner startup
E00
Internal control failure
External limit (terminals 13 & 14) control is OPEN
Blower signal does not reset to zero
No blower signal present
Supply temperature sensor is short circuited
11
12
15
16
29
28
E
E
E
E
E
EFlue temperature exceeds 250 F
52
EInternal control error - failure to read parameters
61
E
Return temperature is short circuited
Supply temperature sensor is OPEN
Return temperature sensor is OPEN
Internal control failure
Internal control failure
Inadequate power supply to the fan
E
E
31
32
36
37
44
60
65
E
E
E
E
E
Flue temperature sensor is OPEN
40
E
Return temperature exceeds 212 F
Supply temperature increased too rapidly
Internal control failure
Internal control failure
Internal control failure
Internal control failure
Internal control failure
17
19
25
13
E
E
E
E
Supply Temperature exceeds 212 F
18
E
E14
Error (Hard Lockout) Mode
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CAUTION
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*)8

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Appendix A: Replacement Parts
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Item 3DUW Description
1 Display Control Panel
1A /HIW
5LJKW Display Control Panel Extensions (Not Shown)
2 Base Panel
3 Front Jacket Panel
5 Side Jacket Panel (Left and Right)
6 Top Jacket Panel
7 Top Jacket Access Panel
8 Control Cover Panel
9 Wall Mounting Bracket with 1 Hardware
Jacket Components
*)8

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Item 3DUW Description
1 Heat Exchanger Body
2 Vent Outlet Adapter
3 Combustion Air Inlet Adapter
4 Supply & Return NTC Sensor (NTC1, NTC2)
5 Flue NTC Sensor (NTC5)
6 LWCO Pressure Device
7 Condensate Drain Assembly
8 Boiler Piping - Return Assembly
9 Boiler Piping - Supply Assembly
10  Pressure Gauge and Fitting
Internal Components
*)8


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7
6
9
1
2
10
12
13
4
3
5
8
)LJXUH)LJXUH%XUQHU&RPSRQHQWV
Item 3DUW Description
1 Combustion Chamber Insulation
2 Burner Head with Gasket
3 Burner Plate
4 Blower with Gasket
5 Gas Valve
6 Venturi
7 Ignition Cable
8 Igniter with Gasket
9 Sight Glass Assembly (Glass, Gasket and Bracket)
10  Propane Orifice - Not Shown
11  Burner Plate Gasket - Not Shown
12  Gas Valve Piping
13  Gas Supply Piping
Burner Components
*)8