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  • Ships today when you order by 4 PM Central
  • Genuine OEM parts
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  • Helping fix things since 1938
  • Ships today when you order by 4 PM Central
  • Genuine OEM parts
  • 90-day returns
  • Helping fix things since 1938
Marley, Qmark, BerkoGenuine OEM Part

Marley Relay CDFTR4 CDF TRANSF / RELAY 208/240V

208/240V transformer relay kit for Marley and Qmark commercial downflow ceiling heaters, with 24V secondary and holding relay.

$224.15

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  • Genuine OEMFactory original part
  • Same-Day ShippingIn-stock orders by 4 PM Central
  • 90-Day ReturnsSee return policy
  • Expert Support800-654-3545Mon–Fri, 8 AM–5 PM Central

Compatible Models

The Marley CDFTR4 fits 16 models. Type your model number to check.

Don’t see your model? This list may not include every model this part fits. Call 800-654-3545 or email [email protected] and we’ll check compatibility for you.

Need help finding your model number?

Product Details

Part NumberCDFTR4
BrandMarley, Qmark, Berko
Part TypeRelay/Contactor
Manufacturer DescriptionCDF TRANSF / RELAY 208/240V 24S
ConditionNew — Genuine OEM
Primary Voltage208/240V AC
Secondary Voltage24V
Relay Coil24V holding coil
Current Rating22 A
Phase / FrequencySingle phase, 60 Hz
ApprovalsUL and cUL listed
Compatible Models16 (see list)
AvailabilityIn stock
ShipsSame business day if ordered by 4 PM Central
Returns90 days on new, unused items
SKUYCDFTR4
Not sure this is the right part?Our parts experts will check it against your model number.800-654-3545 · [email protected]Mon–Fri, 8 AM–5 PM Central

About the Marley CDFTR4

The CDFTR4 is a transformer relay option for Marley and Qmark commercial downflow ceiling heaters. It combines a transformer with a 208/240V primary and 24V secondary, plus a control relay with a 24V holding coil.

It is a unit-mounted, single-phase, 60 Hz kit, UL and cUL listed. For 277V heaters the matching kit is the CDFTR7.

Per the manufacturer, the heater's optional power relays or built-in thermostat cannot be used together with the transformer relay option. Check your heater against the compatible-models list on this page.

Installation Tips

Turn off power to the heater at the breaker before installing. The manufacturer notes this option cannot be combined with the heater's optional power relays or integral thermostat.

Why Buy From Carroll Parts?

  • Helping Fix Things Since 1938Over 85 years of parts expertise
  • Same-Day ShippingIn-stock orders placed by 4 PM Central ship the same business day
  • 90-Day Return PolicyBuy with confidence
  • Real Parts Experts800-654-3545 · Mon–Fri, 8 AM–5 PM Central

Frequently Asked Questions

Can I use this with the heater's built-in thermostat?

No. Marley says that if you choose the transformer relay, you can't also use the heater's optional power relays or its built-in thermostat.

Is there a version for 277V heaters?

Yes. The 277V transformer relay is part number CDFTR7; the CDFTR4 is for 208/240V.

Will the Marley CDFTR4 fit my heater?

It fits the 16 models listed under Compatible Models on this page. If your model isn’t listed, call us at 800-654-3545 and we’ll check for you.

Is the Marley CDFTR4 a genuine OEM part?

Yes. This is a genuine Marley factory replacement part, not an aftermarket copy.

When will my order ship?

In-stock orders placed by 4 PM Central ship the same business day.

What is your return policy?

Items must be new and unused. You can return them within 90 days. Please read our return policy before sending anything back. Questions about a return? Call 800-654-3545 or email [email protected], Mon–Fri, 8 AM–5 PM Central.