DCS DRH-48N Manuel D’Utilisation

13

To keep your Del Rey Heater in maximum performance, we recommend the following to be perform
annually.

1. With an air hose regulated to 30 psig, blow off any dust and dirt that has accumulated 

around the burner and inside the control compartment of the heater. Proper eye protection
required.

2. From the front of the heater, direct the air hose from a distance of approximately 12 inches 

over the entire exposed area of each burner's ceramics.

3. Do not insert air hose into the inlet of the burner.

4. Remove main burner orifice, clean and re-install.

5. Check to insure heater is securely mounted and the clearance from combustible materials 

is maintained.

6. If additional service to the heater is required contact your local dealer or the factory.

a)    Check power supply, should have 24 volts between power wires. Use volt meter between 

inlet wire and ground terminal inside heater control box to measure 24 volts.

b)   Check continuity by using an ohmmeter. Check resistance between valve wire and ground.

Ohmmeter should read almost no resistance or (# ohms) through valve. If high resistance,
check wire connectors.

c)    Be sure connectors are fully inserted into ignition control.

a)  Manual gas valve not fully to “ON” position. Turn valve handle to full “ON” position. Also 

ensure internal lever is in the “ON” position (as shown on page 11).

b)   Burner orifice plugged. Remove service panel, remove burner orifice (7/16” wrench) and 

thoroughly clean. Insects may crawl into orifice hole and block the orifice.