CPCB approved RECD for DG setFor organizations managing several generators, purchasing a is not simply a matter of ordering multiple units at the lowest possible price. Bulk procurement requires careful attention to engine compatibility, product documentation, installation planning, warranty conditions, spare-parts availability, and long-term technical support.

Factories, commercial buildings, hospitals, institutions, infrastructure projects, warehouses, and large facilities may operate several DG sets, sometimes with different engine models and capacities. A supplier that can manage one installation may not necessarily have the systems and resources required for a multi-generator project.

This guide explains what buyers should evaluate when placing bulk RECD orders and how to assess warranty and after-sales support before signing a purchase agreement.

Why Bulk RECD Procurement Requires More Planning

A single DG-set installation can usually be handled as an individual technical project.

Bulk procurement is different.

A buyer may have:

Multiple DG sets
Different engine manufacturers
Different engine models
Different capacities
Separate installation locations
Different exhaust configurations
Different operating schedules

Ordering the same RECD for every generator without checking individual applications can create technical and documentation problems.

The first step should therefore be to prepare an asset list containing the details of every DG set.

Don't Assume One Product Fits Every DG Set

Bulk orders often encourage buyers to standardize equipment.

Standardization can be beneficial, but only when the application permits it.

Different engines may have different:

Exhaust flow characteristics
Exhaust temperatures
Emission profiles
Back-pressure limitations
Operating conditions
Exhaust dimensions

Therefore, the supplier should confirm which RECD model or configuration is intended for each generator.

The purchase order should ideally identify the specific equipment against the corresponding DG set.

Request a Product-Wise Technical Schedule

For a large order, don't rely on a general brochure.

Ask the supplier to provide a technical schedule showing:

DG-set identification
Engine model
Proposed RECD model
RECD family
Applicable power range
Controller configuration
Sensor configuration
Installation requirements
Certification references

This creates a useful record for both procurement and future maintenance.

It also makes it easier to identify discrepancies before equipment reaches the site.

Certification Documentation Should Be Organized

Bulk buyers should maintain certification documentation for every relevant product configuration.

CPCB's RECD certification framework includes provisions relating to Type Approval and Conformity of Production for applicable products.

When receiving documents, check that the information corresponds to the actual equipment being supplied.

Important details include:

Manufacturer
RECD family
Model/type
Engine application
Applicable power information
Certification details
Relevant documentation references

Don't assume that one certificate automatically covers every RECD model purchased from the same manufacturer.

Bulk Orders Need a Clear Delivery Plan

When several DG sets are involved, delivery should be coordinated with installation schedules.

A useful delivery plan should specify:

Batch

Which units will be delivered together?

Location

Where will each unit be installed?

DG Set

Which generator is assigned to each RECD?

Delivery Date

When will the equipment arrive?

Installation Date

When will the installation team visit?

Commissioning

When will the completed system be tested?

This approach is particularly useful when several facilities are being upgraded simultaneously.

Installation Should Be Included in the Project Plan

Bulk installation can become complicated if the supplier and customer do not agree on responsibilities.

Clarify whether the supplier will handle:

Site inspection
Equipment positioning
Mounting
Exhaust connections
Sensors
Controller installation
Electrical connections
Structural support
Exhaust modifications
Commissioning

Also identify work that remains the customer's responsibility.

For example, major civil work, lifting arrangements, electrical infrastructure, or significant exhaust rerouting may require separate arrangements depending on the site.

Commissioning Reports Are Valuable

For each installed RECD, request a commissioning record.

The report can document:

DG-set identification
Engine information
RECD model
Installation date
Installation observations
Controller status
Sensor status
Relevant operating checks
Commissioning observations
Technician details

Keeping these reports together creates a useful technical history.

For a facility with 10, 20, or more DG sets, this documentation can make future maintenance and troubleshooting considerably easier.

Warranty Should Be Negotiated Before the Purchase

Warranty terms should never be left to verbal promises.

The purchase agreement should clearly state:

Warranty period
Warranty start date
Covered components
Controller coverage
Sensor coverage
Installation coverage
Labour coverage
Replacement conditions
Exclusions
Customer responsibilities

Also clarify whether the warranty starts from the delivery date, installation date, or commissioning date.

These details can make a significant difference in a bulk project.

Ask About Warranty for Different Components

Not every component necessarily has identical warranty terms.

For example, ask separately about:

RECD Unit

What is the warranty period?

Controller

Is the controller covered separately?

Sensors

What warranty applies to sensors?

Electrical Components

Are wiring and control components covered?

Installation

Does the supplier cover installation-related defects?

Labour

Are service visits during the warranty period included?

Getting these details in writing avoids uncertainty later.

Understand Warranty Exclusions

A warranty may not cover every situation.

Ask the supplier to explain exclusions involving:

Incorrect installation
Unauthorized modifications
Improper maintenance
Physical damage
Electrical faults
Operating conditions outside specifications
Use of unauthorized replacement components

This is especially important when multiple sites are involved because different maintenance teams may handle the generators.

Spare Parts Are Critical for Bulk Customers

A large facility cannot afford to wait indefinitely for a small replacement component.

Before placing the order, ask the supplier to provide a recommended spare-parts list.

Depending on the RECD configuration, this may include:

Sensors
Controller components
Wiring
Connectors
Mounting hardware
Other serviceable components

Ask about:

Availability
Lead time
Pricing
Stocking arrangements
Recommended quantities

For a large fleet, maintaining selected critical spares on-site may be worth considering.

Preventive Maintenance Should Be Defined

Don't wait for an RECD problem to appear before discussing maintenance.

Ask the supplier for a preventive-maintenance schedule.

It should explain:

Inspection intervals
Sensor checks
Controller checks
Exhaust inspection
Cleaning requirements
Diagnostic procedures
Component replacement intervals
Recommended service practices

The exact schedule should be based on the particular equipment and operating conditions.

Consider an Annual Maintenance Contract

For customers with multiple DG sets, an Annual Maintenance Contract or similar service arrangement may simplify long-term support.

An AMC can potentially cover services such as:

Scheduled inspections
Preventive maintenance
Troubleshooting
Technical support
Component checks
Service reporting

The scope should be clearly defined before signing.

Ask whether emergency visits, spare parts, labour, and replacement components are included or billed separately.

Centralized Support Can Make Bulk Projects Easier

A large customer should ideally have a defined communication channel with the supplier.

Instead of every facility contacting a different salesperson, consider requesting:

Dedicated service contact
Centralized ticketing
Site-wise service records
Asset-wise documentation
Scheduled maintenance reports
Escalation contacts

This becomes particularly useful when generators are spread across different locations.

Compare Total Cost Instead of Unit Price

A supplier offering the lowest per-unit price may not necessarily offer the lowest total project cost.

Consider:

Equipment + Installation + Transportation + Exhaust Modification + Commissioning + Maintenance + Spare Parts + Service

For example, Supplier A may offer a lower equipment price but charge separately for installation and commissioning.

Supplier B may have a higher unit price but include installation, commissioning, documentation, and initial service support.

The second quotation may ultimately provide better value.

Bulk Discounts Should Not Replace Technical Evaluation

Bulk buyers can often negotiate better commercial terms.

Potential negotiation areas include:

Unit price
Installation charges
Transportation
Commissioning
Spare parts
Warranty extension
AMC pricing
Training
Payment schedule

However, price negotiations should begin only after technical requirements have been established.

A discount on an unsuitable product is not a saving.

Ask for Warranty and Support Commitments in Writing

Before issuing the purchase order, request a written commercial and technical proposal.

It should clearly identify:

Product

Exact model and configuration.

Application

DG set and engine information.

Certification

Relevant documentation and references.

Installation

Complete installation scope.

Commissioning

Testing and handover requirements.

Warranty

Duration and coverage.

Service

Response and support arrangements.

Spare Parts

Availability and lead times.

Written commitments make supplier comparison much easier and reduce misunderstandings.

What About RECD Requirements in India?

RECD mandatory for DG sets IndiaThe phrase is often used by generator owners researching retrofit emission-control requirements.

However, bulk procurement should not begin with the assumption that every DG set has exactly the same regulatory obligation.

Applicability should be assessed for each generator based on factors such as:

Engine category
Gross mechanical power
Applicable emission requirements
Generator location
Current CPCB provisions
State Pollution Control Board requirements
Site-specific directions

CPCB's published RECD procedure provides a framework for applicable in-use diesel power-generating set engines up to 800 kW gross mechanical power and includes provisions relating to Type Approval and Conformity of Production.

Because regulatory requirements can change, the latest official requirements should be checked before procurement.

How to Handle Multiple Locations

A company operating generators in different cities should avoid assuming that one installation process automatically applies everywhere.

For each location, confirm:

Site conditions
DG-set details
Local installation requirements
Applicable regulatory directions
Service availability
Transportation arrangements
Commissioning schedule

A centralized supplier can still manage the project, but site-specific technical and regulatory considerations should be documented separately.

Bulk Buyer Checklist

Before finalizing a large RECD order, confirm:

Technical

Complete DG inventory prepared
Engine models verified
RECD model assigned to each DG
Technical specifications received
Exhaust requirements reviewed
Back-pressure considerations addressed

Certification

Relevant certification documentation received
Product/model information matched
Engine applicability verified
Current official requirements checked

Installation

Site surveys completed
Installation scope documented
Exhaust modifications identified
Controller and sensors defined
Commissioning included

Commercial

Bulk price negotiated
Delivery schedule agreed
Transportation clarified
Payment terms documented
Taxes and other applicable charges clarified

Warranty & Support

Warranty period documented
Warranty exclusions understood
Spare-parts availability confirmed
Service response process established
Preventive maintenance schedule received
AMC option evaluated

Questions to Ask Before Signing the Contract

A procurement team can use the following questions during supplier evaluation:

1. Which RECD model is proposed for each DG set?

2. How has engine compatibility been established?

3. Can you provide the applicable certification documentation?

4. Is installation included in the quotation?

5. Who handles commissioning?

6. What is the warranty period and what does it cover?

7. Which components are excluded from warranty?

8. What spare parts should we maintain?

9. What is the service response process?

10. Can you provide preventive maintenance across all locations?

These questions can help identify suppliers that are prepared to support the project beyond the initial sale.

Why Long-Term Support Matters

The purchase of an RECD is not necessarily the end of the supplier relationship.

The equipment remains connected to the generator and may require inspection, maintenance, troubleshooting, and replacement components over its operating life.

For a facility with multiple generators, a strong service relationship can provide:

Consistent maintenance
Faster troubleshooting
Better documentation
Easier spare-parts planning
Centralized service coordination
More predictable maintenance costs

This is one reason supplier selection should consider technical support alongside price and certification.

Choosing the Right Bulk Supplier

The right supplier should be able to demonstrate competence in four major areas:

Product

Can the supplier provide an RECD appropriate for the specific engine application?

Documentation

Can the supplier provide clear technical and applicable certification documentation?

Installation

Can the supplier manage installation and commissioning properly?

Support

Can the supplier continue providing warranty, spare-parts, and maintenance support?

A supplier that performs well across all four areas is generally better positioned to handle a multi-unit project than a company focused solely on product delivery.

Final Takeaway

CPCB approved RECD for DG setBulk procurement of a requires a structured approach. Start by creating a complete inventory of the generators and their engines. Match each DG set with the appropriate RECD configuration rather than assuming that one product automatically fits every generator. Then verify the relevant certification documentation, define installation requirements, plan delivery and commissioning, and establish warranty and after-sales support before signing the purchase order. For large customers, the commercial evaluation should consider the entire lifecycle cost rather than only the initial equipment price. For manufacturers and suppliers such as Aceget, the ability to provide technical guidance, installation assistance, documentation, warranty support, and ongoing service can be an important part of delivering value to large customers.

CPCB Approved RECD for DG Set: Bulk Orders, Warranty & Support Explained

A Breakdown of Bulk Pricing, Coverage & Support Terms for Large-Scale DG Set Orders