Qmark MSPH - Plenum Rated Unit Heater User Manual
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LIMITED WARRANTY
All products manufactured by Marley Engineered Products are warranted against defects in workmanship and materials for one
year from date of installation, except heating elements which are warranted against defects in workmanship and materials for five
years from date of installation. This warranty does not apply to damage from accident, misuse, or alteration; nor where the con-
nected voltage is more than 5% above the nameplate voltage; nor to equipment improperly installed or wired or maintained in vio-
lation of the productʼs installation instructions. All claims for warranty work must be accompanied by proof of the date of installa-
tion.
The customer shall be responsible for all costs incurred in the removal or reinstallation of products, including labor costs, and ship-
ping costs incurred to return products to Marley Engineered Products Service Center.Within the limitations of this warranty, inop-
erative units should be returned to the nearest Marley authorized service center or the Marley Engineered Products Service
Center, and we will repair or replace, at our option, at no charge to you with return freight paid by Marley. It is agreed that such
repair or replacement is the exclusive remedy available from Marley Engineered Products.
THE ABOVE WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED, AND ALL IMPLIED WAR-
RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE AFORESAID
EXPRESSED WARRANTIES ARE HEREBY DISCLAIMED AND EXCLUDED FROM THIS AGREEMENT. MARLEY ENGI-
NEERED PRODUCTS SHALL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES ARISING WITH RESPECT TO THE PROD-
UCT, WHETHER BASED UPON NEGLIGENCE, TORT, STRICT LIABILITY, OR CONTRACT.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above exclusion or limitation
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to
state.
For the address of your nearest authorized service center, contact Marley Engineered Products in Bennettsville, SC, at 1-800-642-
4328. Merchandise returned to the factory must be accompanied by a return authorization and service identification tag, both avail-
able from Marley Engineered Products. When requesting return authorization, include all catalog numbers shown on the products.
Part No. 5200-2834-004
ECR 38777
07/10
MAINTENANCE & REPAIR
Note: Periodic maintenance and repair should be performed by qualified personnel only.
1. Periodically inspect all electrical connections and terminals to avoid electrical wiring difficulties. Inspect all wiring for frayed or
worn insulation.
2. Periodically and before each heating season, clean the steel finned elements and fan inlet with compressed air, vacuum, or
feather brush. Be sure all electrical covers are tightly closed.
3. If heat output seems to be low, check amperage draw on each element leg. Compare measured values to the correct cur-
rents as listed on the unit nameplate.
4. The thermally protected fan motor is permanently lubricated and sealed. No field servicing is required unless needed.
Replace only with a factory supplied identical motor or blower.
5. Check blower rotation to be sure that no is inside blower housing.
TROUBLE SHOOTING
Problem
Potential Cause
Solution
1. Motor does not operate. > Fan delay not operating and /or connected.
> Check connections
> Disconnect switch is open
> Energize circuit
> Blower motor damaged
> Verify and relace if necessary
> No power supply
> Verify and energize circuit
> Blocked blower wheel
> Verify and unblock wheel for proper rotation
2. Heat not working.
> Heating elements are not energized
> Check connections and operation
> Electical components may be open
> Check disconnect, fuses, and circuit breaker
> Fan delay not connected.
> Check connections
> Safety thermal limits opened
> Check, verify and replace if necessary
> Incorrect wattage or voltage of element
> Verify and replace if necessary
> Thermostat setting too low
> Rotate dial clockwise to a higher setting
3. Airflow is insufficient.
> Air filters restriction airflow
> Check, clean, and or replace filters
> Blocked blower wheel
> Verify and unblock wheel for proper rotation.
470 Beauty Spot Rd. East
Bennettsville, SC 29512 USA