1. . Level 3 Air Conditioning Inspections for Buildings
3. Unitary & Packaged Units for L3 Competent Air Conditioning Assessors (Day 1)
PRESENTED BY
Anthony Balaam

2. L3 Packaged System
Unitary Packaged Units:-
Indoor and outdoor components in self-contained ‘unitary’ package.
Installed as ‘through the wall unit’.
May be reversible if a heat pump.
May have electric resistance heater.
Unitary packaged units: the indoor and outdoor units are both contained in a self-contained ‘unitary’ housing, often installed as a ‘through the wall’ unit. The unit may be reversible allowing operation as a heat pump, or electric resistance heating may be included.

3. L3 Packaged System

4. L3 Packaged System Also referred to as ‘split packaged units’.
Individual Split Systems:-
Also referred to as ‘split packaged units’.
HEAT REJECTION
REFRIGERANT CIRCUIT
COOLING
Maximum length depends on the manufacture but as a guide about 30m
Split packaged units: a single indoor unit is connected by refrigerant pipework to a single outdoor unit. The indoor unit may be floor, wall or ceiling mounted. The unit may be reversible allowing operation as a heat pump, or electric resistance heating may be included.
HEAT REJECTION
REFRIGERANT CIRCUIT
COOLING
INDOOR UNIT
OUTDOOR UNIT

5. L3 Packaged System Also referred to as ‘multi-split packaged units’.
Multi-Split Systems:-
Also referred to as ‘multi-split packaged units’.
HEAT REJECTION
REFRIGERANT
CIRCUIT
Multi-split packaged units: a number of indoor units are connected to a common outdoor unit by their own dedicated refrigerant pipework. The indoor units may be floor, wall or ceiling mounted. The system may be reversible allowing operation of all the indoor units as heaters in heat pump mode, or electric resistance heating may be included.
DISTRIBUTION PIPES
SINGLE or MULTIPLE
OUTDOOR UNITS
MULTIPLE
INDOOR UNITS

6. (CAN HAVE VARIABLE FLOW)
L3 Packaged System
Variable Refrigerant Flow (VRF) Systems
Allows variable control of different branches.
REFRIGERANT CIRCUITS
(CAN HAVE VARIABLE FLOW)
HEAT REJECTION
Variable refrigerant flow ( VRF) systems: a number of indoor units are connected to a common outdoor unit by refrigerant pipework on a common network. The indoor units may be floor, wall or ceiling or mounted. Each indoor unit may operate to provide either cooling or heating, allowing heat transfer between zones that require cooling and those that require heating, with the outdoor unit operating in heat rejection or heat pump mode as necessary.
REFRIGERANT
CIRCUIT
BRANCH CONTROL
MANIFOLD
SINGLE or MULTIPLE
OUTDOOR UNITS
MULTIPLE
INDOOR UNITS

7. L3 Packaged System
Typical layout of VRF System

8. LEVEL 3 Air Conditioning ENERGY ASSESSORS TRAINING
ANY QUESTIONS OR FEEDBACK ON ANY SLIDE
Any questions or clarity needed over this topic and slides 8

9. Contacts:- STROMA Certification Ltd – Contacts Web Links
Contacts:-
STROMA Certification Ltd.
4 Pioneer Way, Castleford, WF10 5QU

10. End of this section