Gobi II Condensate Pump

Introduction

Thank you for purchasing the Gobi II condensate pump. This redesigned pump retains popular features while enhancing others. Its digital water sensor, universal voltage, and user-configurable flow make it a leading condensate pump for A/C systems.

General Information

REFCO products are designed for trained refrigeration and air-conditioning service engineers. These operating instructions are essential for the safe and correct operation of the Gobi II. Always adhere to local safety regulations and general safety guidelines. Keep these instructions accessible to qualified personnel at all times. REFCO is not liable for damage resulting from improper use, failure to follow instructions, use by inadequately qualified personnel, or unauthorized modifications.

Symbols and Writing Standards

WARNING/CAUTION: Indicates a safety instruction or potential hazard.
DANGEROUS VOLTAGE: Indicates hazards from dangerous voltages.
Waste of Electrical and Electronic Equipment (WEEE): Do not dispose of the pump with domestic waste.
CE compliant: Conforms to health, safety, and environmental protection standards.
RoHS compliant: Restriction of Hazardous Substances.
Regulatory Compliance Mark (RCM): Compliant with Australian and New Zealand electrical safety requirements.

Safety Instructions

Please read all safety and installation instructions completely before commencing.

Only certified and appropriately trained staff with sufficient technical knowledge and tools should install this product. Installation and electrical connections require professional training.

This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless supervised or instructed by a person responsible for their safety. Children should be supervised to ensure they do not play with the appliance.

Save these instructions for future reference.

For indoor use only. Not submersible.

The Gobi II condensate pump must be installed according to local and regional electrical codes.

WARNING: Disconnect all electrical power before starting installation, maintenance, or service work.

WARNING: Disconnect electrical power before removing and checking the internal fuse.

CAUTION: Do not install the REFCO condensate pump if there are any signs of damage.

WARNING: The supplied power and alarm cords must be checked for damage before installation and periodically thereafter. If a cord is damaged, it must be replaced with the correct part supplied by Refco or an approved service agent.

The Gobi II combined power/alarm cable lead-out is non-replaceable. If damaged, the entire pump must be replaced.

WARNING: The REFCO condensate pump cables should not be cut and should be routed to prevent damage during and after installation.

CAUTION: All tubing connections must be secured using self-locking cable ties. Do not use tools to connect tubing.

DO NOT operate this product in ambient temperatures below 5 °C (41 °F).

DO NOT operate with incoming water above a temperature of 40 °C (104 °F).

CAUTION: Do not allow chemicals to contact this condensate pump. Remove the pump and water sensor before using coil cleaning solutions. Flush evaporator coils with water before reinstalling the pump and sensor.

Ensure evaporator coils are free of chemicals before reinstallation.

CAUTION: This appliance incorporates an earth connection for functional purposes only.

Technical Data

Maximum flow rate:	42 l/hr (11 GPH)
Maximum suction:	3 m (9.80 ft.) self-priming
Maximum head:	20 m (65.60 ft.)
Maximum horizontal run:	100 m (330 ft.) at 0 head and 0 suction
Sound:	19 dBA at 1 m (DIN EN ISO 3741:2011 / DIN EN ISO 3744:2010)
Voltage:	100 ~ 240 VAC 50/60 Hz auto-sensing universal power input
Power:	8 W during maximum operation at 110 V
Alarm relay:	10 Amps contacts with integrated replaceable 10A fuse 5 × 20 mm
Weight:	1,100 g (2.45 lb.)
Discharge star tube:	6.25 mm I.D. (1/4") × 1 m (3.3 ft.)
Packaging dimensions:	250 × 340 × 54 mm (9.9 × 13.4 × 2.1 inches)
Bulk pack dimensions:	10 Pcs: 590 × 265 × 365 mm (23.2 × 10.4 × 14.4 inches)
Color:	RAL #9003 white
Protection:	Fully potted, IP-44
Operation temp:	Ambient 5°C to 40°C (41°F to 104°F) / Water 5°C to 40°C (41°F to 104°F)
Compliance:	CE, RoHS, RCM

Capacity Chart

A chart showing the relationship between Capacity (l/hr) on the x-axis and Vertical lift (ft) on the y-axis, with a curve labeled 'Gobi II'. The chart indicates that as capacity increases, vertical lift decreases.

Product Description

Pump body
Factory-installed fuse
Replaceable filter
Digital sensor
Water tray
DIP-switches
USB port
Diagnostic LED
Wall back plate
Cover

Dimensions

Diagrams showing the dimensions of the pump: 53mm width, 53mm height, and 286mm length.

Provided Accessories

Screws (3 pcs.)
Star tube and Stop-Siphon device
Alarm relay HR 10A fuse / Part No. 3004050
Screw anchors (3 pcs.)
Cable ties (3 pcs.)
Power cable: Type SVT 18AWG*3C, Cable +H05VV-F 3G 0.75mm²
Alarm cable Part No. 3004140

LED Alarm Relay Indications

LED Alarm Relay Operation Table

This table describes the alarm relay operation based on pump status and condensate level, showing configurations for 'Default operation' (NC - Normally Closed) and 'Peripheral Mode' (NC - Normally Closed).

LED Indications in Operation

No power: Pump is miswired or no incoming voltage. Problem with A/C system or alarm is miswired.
Start up LED sequence (default mode): Alternating red/green flashes 5x, then stops and goes to standby mode.
Start up LED sequence (peripheral mode): Alternating red/green flashes 5x, then stops and goes to standby mode.
Standby mode - waiting for water: Blinking green continuously.
Pumping water: Solid green. Normal operation at various power configurations.
High water level mode: Blinking red. Pump running above high water level.
Alarm mode - relay activated: Solid red. Pump cannot keep up with water input. Power to A/C is interrupted to prevent overflow.
Reconfigure code: Pump has had 3 extra long run cycles; reconfigure dip-switches for more capacity.

Diagram showing DIP switches and corresponding LED indicators (green for normal, red for alarm).

Transport and Storage

Transport

Inspect the GOBI II for any potential transportation damage. Report any obvious damage to the vendor immediately.

Storage

Storage temperature: -20 °C to +60 °C
Humidity: 0 to 90% relative humidity (no condensation)

Commissioning

Application

The Gobi II pump can be mounted on the right or left side of an evaporator unit.

Tools Needed

Tools shown include a drill with a 5.5mm (7/32") drill bit, a level, wire cutters, and a screwdriver.

Installation Steps

Mount the wall back plate using the provided screws and anchors. Ensure it is level.
Attach the pump to the wall back plate.
Connect the condensate drain tubing to the pump's discharge barb. Secure with a cable tie.
Connect the power and alarm cables. Ensure connections are dry.
Route cables to prevent damage.
Configure DIP switches for desired capacity (low, medium-low, medium-high, high) based on the A/C unit's rating. The factory default is 'low'.

CAUTION: Cables and pipes may be in the wall cavity. Be careful while drilling anchor holes.

Diagrams illustrate the mounting of the back plate, pump attachment, drain tubing connection, and electrical connections.

Power and Alarm Connections

Diagrams show various installation scenarios for connecting the Gobi II pump to different A/C system configurations, including single indoor units powered from outdoor units, multi-split systems, and scenarios with or without alarm wiring.

INPUT POWER: 100-240V, 50/60Hz, 2.5A (Max)

The alarm relay fuse must be rated for the specific application and of the HRC type, 5 x 20mm 250 VAC, 10A (Max).

This appliance incorporates an earth connection for functional purposes only.

Wiring Diagrams

Detailed wiring diagrams illustrate connections for different A/C unit types and power sources, including the use of the alarm relay.

Drawing #1: Indoor evaporator unit powered from outdoor condenser unit.
Drawing #2: Multi-split system installation.
Drawing #3: Outdoor condenser powered from indoor evaporator unit.
Drawing #4: Power only with no alarm circuit (not recommended).

The alarm relay operation table is provided, detailing 'Default operation' and 'Peripheral Mode' for different pump statuses and condensate levels.

Maintenance

Water Filter Maintenance

Regular cleaning or replacement of the Gobi II water filter prolongs pump life by preventing debris from entering the pump. Recommended service intervals are a minimum of every 12 months, or every 3 months in dusty environments or those with cooking oils or potential algae growth.

To clean/replace the filter: Remove it from the Gobi II suction barb, wash with cold water, and replace it.

Change Alarm Fuse