NTI FTG 600 - Troubleshooting

FTG │Installation & Operation Manual
57
16.0 TROUBLESHOOTING
Observe the following precautions when servicing the boiler. Failure to comply with
these may result in fire, property damage, serious injury or death.
Servicing the Boiler
 Disconnect or shutoff all energy sources to the boiler: 120VAC power, water and gas.
 Identify and mark wires before disconnecting or removing them.
 Never bypass electrical fuses or limit devices except temporarily for testing.
 Use proper personal protective equipment (PPE) i.e. eye protection, safety footwear.
These procedures should only be performed by qualified service personnel, when abnormal operation of the
boiler is suspected. The boiler incorporates a sophisticated microprocessor based control which normally
responds appropriately to varying conditions. If the boiler operation appears to be incorrect, or it is not
responding at all to a demand for heat, the following is suggested to determine and correct the problem.
Before undertaking any troubleshooting procedures it is highly recommended to have
available a digital multimeter (s) capable of measuring AC and DC volts, Amperes,
Resistance (Ohms) and Continuity.
Internal Fusing
The power supply to the FTG boiler must be externally fused (or protected via a circuit breaker) according to its
rating plate. In addition, each FTG integrates internal circuit protection, as defined in Table 16-1.
Table 16-1 Internal Circuit Protection – Fusing
Applicable
Models
Desciption
Location
Component(s) Fused
FTG 600-2400
Ignition Transformer
(120V, 7A)
Right side of control panel
Ignition Transformer
FTG 600-1400
24V Transformer
(24V, 3A – Circuit Breaker)
24V Transformer (on control
panel)
All 24V Components:
- Control board
- Touchscreen display
- Gas Valve
- Limit switches
- Thermostat circuit
- Pump Relays
FTG 2000-2400
24V Transformer – Secondary
(24V, 10A)
Secondary/left-side of 24V
Transformer (on control
panel)
24V Transformer – Primary
(120V, 5A)
Primary/right-side of 24V
Transformer (on control
panel)
24V Transformer
FTG 2200-2400
120V Transformer – Primary
(208/240V, 10A)
Primary/left-side of 120V
Transformer (behind control
panel)
120V Transformer
120V Transformer –
Secondary
(120V, 10A)
Secondary/right-side of 120V
Transformer (behind control
panel)
All 120V Components:
- 24V Transformer
- Ignition Transformer
- Convenience Outlet
- L1 120V Power Supply to Line
Voltage Junction Box
3Ph Fuse Block
(208/240V, 15A, X 3)
3Ph Fuse Block, left of 120V
Transformer (behind control
panel)
All 208/240V Components:
- Combustion Blower
- 120V Transformer
Note:
1
Refer to Figure 16-1 for locating internal fusing.