ORCA UC5000 Installation & Operation Manual

01 Identification, safety and use

This manual accompanies model ORCA UC5000. Record SKU, serial number, voltage, fuel and revision before installation. Accessories, functions and protective devices depend on the supplied variant.

Engine preheating and heating of a closed antifreeze circuit; cabin heating via a separate heat exchanger. No direct connection to drinking water.

Carbon monoxide: combustion gases must remain outside occupied spaces. Do not operate in a garage or other enclosed location. Keep intakes and flue outlets clear, especially after snow, mud or travel.

Fuel smell, abnormal smoke, leakage or a CO alarm: stop use, move occupants away and have the installation inspected. Do not restart to conceal a fault. Contact emergency services if there is immediate danger.

Fire and burns: keep combustible materials away from the appliance, hot ducts and exhaust. Do not use the service compartment for storage. Allow cooling before inspection and keep children away from hot surfaces.

Power: use the nameplate voltage. Never increase a fuse rating or bypass protection. For a normal stop, allow the controlled cooling cycle to finish before disconnecting power.

Stop before refuelling. Fuel, combustion, gas and mains work require a qualified professional. Install and maintain a CO detector suitable for the application according to its own instructions.

Coolant heating: the appliance belongs in an approved cooling loop and needs adequate circulation. Confirm flow direction, pump, bleeding, fluid compatibility, valves, flow rate and pressure. Never work on a hot or pressurised loop. Engine coolant is not drinking water.

02 Variant specifications

Differences between variants

For unpublished values, use the supplied variant's nameplate and data sheet: starting current, fastening torque, pressure, pump flow and protection devices cannot be inferred from power.

03 Recommended applications and output selection

Engine-displacement ranges are selection guides. They do not establish a circuit-volume limit. Use the vehicle-specified antifreeze mixture and a suitable pump.

04 Functional section and UC5000 circuit

Drawing callouts: identify components before service. A sectional view shows operation; it does not define a disassembly sequence. Check the unit revision before ordering any part.

05 Step-by-step installation

STEP 1 - Mount the heater

Provide an accessible rigid support. Identify coolant inlet and outlet on the unit and leave clearance for the burner, pump and connections.

STEP 2 - Create the hydraulic circuit

Connect to the closed antifreeze circuit. Follow circulation direction and avoid restrictions and high points trapping air. Install the pump suitable for the circuit; separate engine coolant from drinking water.

Unit orientation Closed coolant circuit

STEP 3 - Fill and bleed

With the engine cold, fill with the vehicle-specified coolant. Open the necessary valves, bleed the heater and pump, then check level and leak tightness. Never start dry.

ACTION DETAIL - schematic

Insert both tubes until they meet.

Detail: no air pocket between tubes.

STEP 4 - Connect combustion circuits

Install combustion intake and exhaust outside the cabin. For UC5000/UC9000 use the matched metering pump. For larger units follow the supplied burner's architecture: do not replace the circuit with a small metering pump.

Heater and pump position Metering pump

STEP 5 - Check electrical supply and heating

Test power under load and circulation. Measure supply/return temperatures. Check the cabin-fan control if fitted. Complete a full shutdown and recheck the level when cold.

06 Electrical connections

DC battery Fuse holder ECU / unit UC5000

+ protected near the battery; dedicated - return

Compatible controller Signal harness

Schematic. Pins, rating and voltage: use the supplied harness.

Maintain power during cooling. Normal shutdown uses the controller; do not install a switch that interrupts the cycle. Protect cables and connections against water, abrasion and heat.

Circuit detail for the illustrated family. Drawing labels identify components; check connectors, voltage and options on the supplied harness. A mains connection cannot be inferred from nominal power alone.

07 Initial commissioning

08 Operation and controls

The coolant heating setpoint differs from ambient temperature. Set the duration and program on the compatible circuit controller; check circulation and battery charge before automatic start.

09 Maintenance and winterization

Before use and after travel, inspect ducts, supports, openings, fuel lines and accessible connections. Once cool, remove external debris without directing water into the intake or flue.

Before the season and after storage, have the installation, battery, protection, tightness and combustion checked. Hour-based intervals, exercise-run duration and component life remain to be confirmed for the exact model and revision.

The user may keep access clear and clean cold surfaces using material-appropriate methods. Burner, exchanger, pump, sensor and ECU removal is qualified service work. Do not adjust fuel delivery or thermal protection.

After repair, require leak checks and a full cycle. Record date, hours, symptom, code, part SKUs and technician. Confirm applicable warranty terms with ATLOSON; other warranty policies are not transferred.

10 Troubleshooting and fault codes

Record the exact code before clearing it. Stop and allow cooling, check the power supply under load, then ducts and the fluid circuit. Correct the cause before a supervised test. A repeated fault requires workshop service.

11 Fault-code table - COOLANT

Table for the controller/ECU of this family. The same number may have a different meaning on another revision.

12 Parts, kits and purchasing

Order by part number and variant. Drawing callouts are not SKUs. Check voltage, fuel and connector before replacement. A complete-system reference is not a maintenance kit.

Records and support

Date / hours: __________________ Work / parts: __________________

Keep the invoice, SKU, serial number and history. For assistance, provide a nameplate photo, code and symptom. ATLOSON support