Troubleshooting - NTI FTG 600 Installation And Operation Manual

FTG

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
Desciption
Models
FTG 600-2400 Ignition Transformer
(120V, 7A)
FTG 600-1400 24V Transformer
(24V, 3A – Circuit Breaker)
24V Transformer – Secondary
FTG 2000-2400
(24V, 10A)
24V Transformer – Primary
(120V, 5A)
120V Transformer – Primary
FTG 2200-2400
(208/240V, 10A)
120V Transformer –
Secondary
(120V, 10A)
3Ph Fuse Block
(208/240V, 15A, X 3)
Note:
1
Refer to Figure 16-1 for locating internal
Location
Right side of control panel
24V Transformer (on control
panel)
Secondary/left-side of 24V
Transformer (on control
panel)
Primary/right-side of 24V
Transformer (on control
panel)
Primary/left-side of 120V
Transformer (behind control
panel)
Secondary/right-side of 120V
Transformer (behind control
panel)
3Ph Fuse Block, left of 120V
Transformer (behind control
panel)
fusing.
│Installation & Operation Manual
Component(s) Fused
Ignition Transformer
All 24V Components:
- Control board
- Touchscreen display
- Gas Valve
- Limit switches
- Thermostat circuit
- Pump Relays
24V Transformer
120V Transformer
All 120V Components:
- 24V Transformer
- Ignition Transformer
- Convenience Outlet
- L1 120V Power Supply to Line
Voltage Junction Box
All 208/240V Components:
- Combustion Blower
- 120V Transformer
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