PRD Bypass damper

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CtrlShft
Posts: 2
Joined: Mon Jul 04, 2022 6:41 pm

PRD Bypass damper

Post by CtrlShft »

Hello,

I just moved into out new house which has a zoned system with a PRD. I suspect that my bypass damper is always open as doesnt change positions when the blower is running or not regardless of the zones being open or closed. Looking at it I think the arm is missing as well. Am I correct? Would anyone have a suggestion on how to proceed?

Thanks!
Steven W.
Posts: 114
Joined: Tue Jun 25, 2019 9:13 am

Re: PRD Bypass damper

Post by Steven W. »

Yes you need the arm and weights for this Bypass to work correctly. This is the part number (PRD-Weights and Arm (for PRD & PRD-RD models) you are looking for.

You can order it from one of these websites;

www.ewcestore.com
or
www.supplyhouse.com
Steven R. Weisneck
Technical Engineer
Tel: (732) 446-3110 Ext. #461
www.ewccontrols.com
sweisneck@ewccontrols.com
CtrlShft
Posts: 2
Joined: Mon Jul 04, 2022 6:41 pm

Re: PRD Bypass damper

Post by CtrlShft »

Thanks Steven!

Unfortunately I am in Canada and I am getting the message that the item cannot be shipped here. Can something be arranged?
Steven W.
Posts: 114
Joined: Tue Jun 25, 2019 9:13 am

Re: PRD Bypass damper

Post by Steven W. »

Companies in Canada

GOODMAN COMPANY CANADA

ECCO HEATING PRODUCTS

Our Rep in Canada - Pacific NW - 509-823-7008
Steven R. Weisneck
Technical Engineer
Tel: (732) 446-3110 Ext. #461
www.ewccontrols.com
sweisneck@ewccontrols.com
satthepbienhoa
Posts: 3
Joined: Fri Sep 20, 2024 9:50 pm
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Re: PRD Bypass damper

Post by satthepbienhoa »

It sounds like your bypass damper may indeed be stuck open if it doesn't change positions regardless of the blower or zone conditions. The missing arm you mentioned could be part of the damper motor or linkage that controls the damper's movement. To proceed, you might:

Inspect for any visible damage or missing parts (like the actuator arm).
Consult the system's manual for part replacements.
Consider contacting an HVAC technician to replace or repair the damper and ensure the system is balanced properly.
Let me know if you'd like further guidance!
Sat Thep Bien Hoa
Technical Engineer
Sat Thep Bien Hoa
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