HVAC Equipment Power sizing Calculations Course

Course Description:

This course is intended to prepare the target persons with the ability to perform HVAC Equipment Power sizing Calculations

The targeted Persons:

Design engineers, new graduate engineers, under graduate engineering students.


Skills Development:


On completion of this course the target person will be able to:

• Know Parts consuming power in HVAC Systems,
• Know types of motors, pumps used in HVAC systems
• Know how to read the name plate for HVAC equipments,
• How to perform sizing calculations for disconnecting means of HVAC equipments,
• How to perform sizing calculations for Branch-Circuit Short-Circuit and Ground-Fault Protection Devices of HVAC equipments,
• How to perform sizing calculations for Branch Circuit Conductors of HVAC equipments,
• How to perform sizing calculations for Branch Circuit Overload Protection of HVAC equipments,
• How to perform sizing calculations for Room Air Conditioners.

Course Outline:

1	Summary of heating and cooling systems,
2	Parts Consuming Power in HVAC Systems,
3	Types of motors used in HVAC Systems,
4	Types of pumps used in HVAC/refrigeration,
5	Parts consuming power as per used unit/system,
6	Motor Nameplate for Air Conditioner Motor Applications.
7	The Common Types Of Motors Used In HVAC Industry
8	First: the Common Types of Motors Used in HVAC Industry to drive Compressors	1- Single-Phase Hermetic Motors:
		1.1 Split Phase (SP),
		1.2 Capacitor-Start, Induction-Run (CSIR),
		1.3 Capacitor-Start, Capacitor-Run (CSCR),
		1.4 Permanent Split Capacitor (PSC),
		2- Poly-Phase Hermetic Motors.
9	Second: the Common Types of Motors Used in HVAC Industry to drive Fans	1- Shaded-Pole Motors
10	HVAC System Units And Ratings
11	Energy Conversions In Air Conditioning / Refrigeration Systems
12	Difference between Service, Feeder and Branch circuit load calculation
13	The HVAC System Contribution in Service/Feeder Load Calculations
	First: NEC Standard Method
	Second: NEC Optional Calculation Method	First: For Single Dwelling Units
		Second: Multifamily Dwelling
		Third: Two Family Dwelling (That are Supplied By a Single Feeder)
		Forth: Existing Dwelling Unit
14	NEC Code & the Hermetic Refrigerant Motor-Compressors
15	Sizing Calculations for Air Conditioning and Refrigeration Equipment as Per Article 440:
	First: Sizing Calculations for Disconnecting Means:	Case# 1: The load type is a single hermetic motor only as per 440.12(A),
		Case# 2: The load type is a Combination loads as per 440.12(B).
16	The Minimum Circuit Ampacity (MCA)
17	Maximum Over-Current Protection (MOP) or (MOCP)
18	Second: Sizing calculation for Branch-Circuit Short-Circuit and Ground-Fault Protection Devices
	Case# 1: The load type is a single hermetic motor only as per 440.22(A),
	Case# 2: The load type is a Combination loads as per 440.22(B).	Case# 2A: Where a hermetic refrigerant motor-compressor is the largest load,
		Case# 2B: Where a hermetic refrigerant motor-compressor is not the largest.
19	Third: Sizing Branch Circuit Conductors
	‎Case# 1: The load type is a single hermetic motor only as per 440.32,‎	Special Case: For a Wye-Start, Delta-Run Connected Motor-Compressor
	Case# 2: The load type is a Combination loads as per 440.33.‎
20	Fourth: Sizing Controllers ‎
	Case# 1: Controller Serving Motor Compressor only as per 440.41(A),‎
	Case# 2: Controller Serving More Than One Load as per 440.41(B).‎
21	Fifth: Branch Circuit Overload Protection
	The methods for providing overload protection for the motor-compressors are listed ‎as follows:‎	1-A separate overload relay,‎
		2-A thermally protected motor-compressor,‎
		3-A fuse or inverse time circuit breaker,‎
		4-A special protective system.‎
22	Sixth: Provisions for Room Air Conditioners	1- Sizing Branch-Circuit Short-Circuit and Ground-Fault Protection
		2- Sizing Branch Circuit Conductors
		3- Sizing Disconnecting Means
		4- Protection Device for the Cord
23	Summary Tables For Sizing Calculations For Air Conditioning And Refrigeration Equipment As Per NEC Article 440