Goodman Releases CoolCloudHVAC™ Technical Guide for Furnaces with ComfortBridge™ Control Platform

With the introduction of the ComfortBridge™ control platform for furnaces, Goodman has released this Technical Support Guide for the CoolCloudHVAC™ app developed for the installer and service technician.

This Technical Guide should be used in conjunction with the installation manual for furnaces with the ComfortBridge™ control platform as a resource for proper set up of the furnace when using the CoolCloudHVAC™ app.

Download the full guide here.

 

ComfortBridge™ Control System Furnace Non-Communicating Setup Using PCB Pushbuttons

Goodman has released Service Bulletin SF-078 containing instructions on setting up a new ComfortBridge™ control system furnace with a non-communicating outdoor unit.

(For Goodman’s announcement on the ComfortBridge system, click here.)

From Goodman:

When installing a new ComfortBridge™ control system furnace with non-communicating outdoor units please adhere to the following instructions for setting up the equipment airflow. This safeguard was put in place to prevent maximum airflow when no adjustments are made during the install.

NOTE: Please refer to the Quick Start section of the installation manual IOG-2015 for low voltage wiring connections for your specific application. Once you have the unit installed, wired in correctly to terminals Y and G, and ready to start up, the following will assist you in configuring the furnace to operate with a non-communicating air conditioner using the PCB push buttons. Failure to follow these instructions will cause the unit to stay in “IdL” mode and not pass the call for “AC” airflow with a call for cooling.

1. From the “IdL” menu push the Left or Right push buttons until you get to the “OdS” menu.

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2. Once at the “OdS” menu push the center button. This will get you into the submenu and display will now read “Off”. Once “Off” is on the 7 segment LED then push the Right button until you see “1AC” (single stage AC). Select the center button once to accept “1AC” and a second time back out to the “OdS” menu. Note: The “OdS” menu also contains configuration options (2AC-2stage AC, 1HP-1 stage HP, 2HP-2 stage HP.)

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3. Once you have selected “1AC” and hit the center button twice you will now see “OdS” in the 7-segment displays. This confirms the change has been made and you can now push any two buttons and you will be brought back to the main “IdL” menu.

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4. You have now successfully configured the system to utilize a non-communicating air conditioner using the PCB pushbuttons. You now need to select an airflow value in the “ton” menu. You will set this according to what CFM is required by the size of the AC you have installed as found in IOG-2015.

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3 Ton Models = 1400 CFM (*MVC960803 max CFM is 1650)

Note: the system will not provide airflows above the Max Airflow Value.

  • 3 Ton Models = 1400 CFM (*MVC960803 max CFM is 1650)
  • 4 Ton Models = 1760 CFM
  • 5 Ton Models = 2200 CFM

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Amana/Goodman 80% Furnace Flue Connector Fit-Up Inaccuracy

Goodman has released Service Bulletin SF-076 concerning the positioning of the flue connector fit-up on an on 80% furnaces produced at the new Daikin Texas Technology Park.

Please note: The positioning of the flue fit-up connector does not affect the safety or performance.

Beginning January 2018, the 80% furnace production began transitioning to our new factory at the DTTP (Daikin Texas Technology Park). In conjunction with this transition, enhanced manufacturing processes and tooling changes were implemented.

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As a result of these changes, we have recently found that the mounting brackets securing the heat exchanger to the wrapper were positioned further forward in the cabinet than intended on these DTTP produced furnaces. This may affect the fit-up of the flue connector as shown in the picture on the right. Some of the 80% furnaces, as listed in the table below, with serial number prefixes of 1801xxxxxx and 1802xxxxxx are affected.

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For upflow or horizontal right installations: In some cases it will be necessary to lift the top panel slightly by pushing upwards on the bottom side of the top panel to allow the flue connector to slip onto the top of the induced draft blower. Additionally, it may be helpful to loosen or remove the two screws securing the left side of the top panel to improve access. After positioning the flue connector these screws should be secured as normal.

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For horizontal left installations: These applications generally require the chimneytransition bottom kit part # 0270F01119 orservice part # 4053501S. In most cases no additional trimmingof the horizontal flue cutout will be required. However, ifneeded the opening may be trimmed towards the front of thefurnace to provide adequate clearances.

Some models also state for horizontal installations to install a #8 x 5/8 screw through the center of the top panel (hole provided) into the flange of the partition panel. This hole will need to be moved ¼” towards the front of the furnace to avoid missing the partition panel. A self-tapping screw may be used.

Please note this does not affect the furnace safety or performance.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Incorrect Speed Selection on Dip Switch Sticker on *MVC96/*CVC96 Furnace

Goodman has released Service Bulletin SF-075 concerning an error found on the dip switch sticker on select furnaces:

Goodman has discovered an error in the blower speed label affixed to the *MVC96 and *CVC*96 furnace product. Under the Speed Selection Dip Switches section of the door sticker the Heat Selection Switches Taps B, C, and D (S4-3 and S4-4 switches) are mislabeled.

Please refer to the following Switch Bank S4 chart that can be found in the installation instructions that come with the furnace regarding the proper settings below. These Dip Switch settings are for a Legacy (24 volt thermostat) setup as the Dip Switches are not used if the system is utilizing a Communicating thermostat.

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If the factory default Dip Switch setting (B) was not changed there will be no change to the intended airflow. If the Dip Switch setting (B) was changed to match what was shown on the furnace label rather than the I&O then this would result in a minor increase in airflow as you are now operating as Tap (C).

Per page 39 of the installation instructions it is recommended to perform CFM verification at Startup as follows: “Select the desired heating speed tap by positioning switches S-4 3, 4 appropriately. Refer to figure above. Verify CFM in heating by noting the number displayed on the dual 7- segment display.”

There is no action required to correct the door sticker as this does not pose a safety or operational furnace issue. Units with serial prefixes of 1802 or later the door stickers have been corrected and are unaffected by the issue.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Circuit Breaker Sizing on HKSC10 and Smaller Heat Kits

Goodman released the following bulletin, G-GN-OT-1494, regarding circuit breaker sizing on heat kits:

Circuit breakers furnished with the heat kits of 10kw and less are for safety disconnect purposes only and are not supplied to be used for circuit protection. The 60 amp breaker has been tested and approved by ETL to be used with the HKSC10 and smaller heat kits. The breaker is sized for 208/230V operation and approved by ETL for use with both voltages.

Heat Kits are shipped with label indicating “CIRCUIT BREAKER IS NOT INTENDED FOR BRANCH CIRCUIT PROTECTION. IT SERVES AS A DISCONNECT ONLY.”

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At installation of the heater, this label should be affixed to the front of the indoor unit.

Note that the circuit breaker for the air handler branch circuit protection must be properly sized according to the MOP value. Please reference the product specification sheet for these values.

Paragraph 90.7.of the NEC states the following:
(It is the intent of this Code that factory-installed internal wiring or the construction of equipment need not be inspected at the time of installation of the equipment, except to detect alterations or damage, if the equipment has been listed by a qualified electrical testing laboratory that is recognized as having the facilities described in the preceding paragraph and that requires suitability for installation in accordance with this Code.)

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.

Updates to Lochinvar After-Hours Tech Support

Lochinvar has announced new hours for its Technical Service Hotline:

After Hours Support: 5 PM EST – 8 PM EST (Monday – Friday)
Emergency Support: 9 AM EST – 5 PM EST (Saturday – Sunday)
Holiday Support: 9 AM EST – 5 PM EST (Closed Thanksgiving Day & Christmas Day)
Hotline: 1.800.722.2101

This support is in addition to the support you receive as an HVAC Distributors customer.

HVAC Distributors’ Tech Service Department is available Monday – Friday from 8 AM – 5 PM EST by calling 1.800.228.4822 x 5.

Our Tech Service Department provides technical support on all of the products that we sell, which saves you time from calling individual manufacturer tech lines.

Defrost Timer Change on AVZC18/20 SEER Inverter Heat Pump Units

Goodman released Service Bulletin SR-072, regarding a software change on AVZC18 and AVZC20 Inverter Heat Pump units:

This bulletin is to inform you of a software change made to the Inverter Heat Pump models listed above. For units with a serial number prefix of 1706 and later the factory default setting for the defrost interval has been changed from 30 minutes to 120 minutes.

The defrost time interval can still be field adjustable to 30, 60, 90 or 120 minutes between defrost cycles to suit weather conditions and unit performance. This setting can be adjusted in the Comfortnet User Menu of the CTK04AE thermostat by selecting “Inverter” – “Heat Set Up” – “Defrost Interval”. When in this Sub Menu select 30, 60, 90,120 minutes setting.

NOTE: Oil Return Mode: In order to properly return the oil to the compressor, compressor speed may periodically adjust to assist oil circulation. These Inverter units utilize an oil return mode to properly return oil to the compressor which functions similar to a defrost cycle and may create the appearance of the unit having unnecessary defrosts.

If you have questions about this bulletin, HVAC Distributors customers can reach out to our Technical Service department at 800.228.4822 x5.