GOLD CGa Gas-Fired Water Boiler — Boiler Manual

11c Troubleshooting — spark-pilot boilers

The information on this page and

PAGESG THROUGHO APPLYPONLY TO SPARKIGNITEDI PILOTL #'A' BOILERS These boilers are equipped with an ignition control module that has in- dicator lights to show control status. #HARTS 2 through  PAGESG  help you identify problems based on indicator light conditions.

Control module

Solder or water splatter between plugs and circuit board can cause improper operation of control module. Place a shield over the boiler internal controls and components during installation. Failure to comply could result in severe personal injury, death or substantial property damage.

Make sure ground wiring is installed per wiring

DIAGRAM 'OOD GROUNDINGNIS EXTREMELYEIMPORTANTRFORO

proper operation.

Control indicator lights —

LOCKOUT modes

See Charts 1 through 7 in this section for detailed troubleshooting procedures.

4O RESETSCONTROLTAFTERTAALOCKOUT TURN OFFFPOWERWAT THEH6!# SERVICEVSWITCH OR TURN down all thermostats. Wait 45 seconds. Then restore power or call for heat.

POWER light flashing alone

5SUALLYAINDICATESIREVERSED POLARITY OF  6!# POWER WIRES

POWER and TSTAT CIRC lights flashing

Usually indicates stray voltage on external thermostat circuit wires (usually due to miswired 3-wire zone valve).

POWER and DAMPER lights flashing

Usually indicates damper circuit is closed when it should not be, or damper failed to close within 5 minutes.

POWER and FLAME lights flashing

Usually indicates false flame sense or flame sensed when it shouldn’t be there.

Control indicator lights —

NON-LOCKOUT modes

POWER light on and FLAME light flashing

Usually indicates pilot flame was not established within 15 seconds from application OF SPARK #ONTROLTWILL mASH LIGHT BUTUWILL CONTINUE TO CYCLECINDElNITELY UNTILTmAME

is established or problem is corrected.

POWER light on and DAMPER light flashing

Usually indicates the damper circuit opened during the run cycle.

Troubleshooting the control module

See Figure 30 , page 53, for location of harness plug receptacles and plugs on the control module.

52

Part Number 550-101-009/0107

Page 52
Image 52
Weil-McLain CGA25SPDN 11c Troubleshooting spark-pilot boilers, Control module, Control indicator lights Lockout modes

CGA25SPDN specifications

The Weil-McLain CGA25SPDN is a high-efficiency gas-fired boiler designed to deliver dependable heating performance while maintaining a strong focus on energy savings and user-friendly operation. Ideal for residential applications, this boiler is engineered to provide consistent warmth and comfort in homes with various heating demands.

One of the main features of the CGA25SPDN is its durable construction. Built with high-quality materials, this boiler is designed to withstand the rigors of frequent operation while maximizing longevity. It features an advanced cast iron heat exchanger that efficiently transfers heat to the water, resulting in lower energy costs and improved overall performance.

Efficiency is a key characteristic of the Weil-McLain CGA25SPDN. Its design promotes efficient combustion, allowing for a higher Annual Fuel Utilization Efficiency (AFUE) rating. With an AFUE rating of up to 82%, this boiler ensures that more of the fuel used is converted into usable heat, which translates to reduced energy bills for homeowners.

The boiler exhibits a user-friendly control system that allows for easy operation and maintenance. It comes equipped with an integrated vent damper that maximizes efficiency by reducing heat loss during standby periods. Additionally, the CGA25SPDN features an adjustable thermostat, enabling homeowners to customize their heating preferences easily.

Another significant feature of the CGA25SPDN is its versatility. The boiler is compatible with various heating applications, including hot water heating systems and home heating configurations. This adaptability makes it a great choice for both new installations and retrofitting existing systems.

Safety is always a concern with gas-fired appliances, and the Weil-McLain CGA25SPDN addresses this through its advanced safety mechanisms. The boiler incorporates safety controls that prevent overheating and ensure proper operation, providing peace of mind to homeowners.

In summary, the Weil-McLain CGA25SPDN stands out as a reliable and efficient heating solution for residential settings. With its durable construction, high-efficiency performance, user-friendly controls, and impressive safety features, it is an exceptional choice for those seeking a dependable gas-fired boiler that meets modern heating demands while keeping energy costs in check. Homeowners can trust the Weil-McLain CGA25SPDN for warmth and comfort through the cold months.