Installation Guide

Installation Guide



The Best Practice Installation Guide is a step by step installation guide. It covers the installation of most common types of residential heat pumps in NZ.


Contents


2.1 Types of heat pump systems 8

2.2 Components of a heat pump 10

2.3 How a heat pump works 12

2.4 Fixed-speed and inverter compressors 12

3.0 Heat pump performance 13

3.1 Heat pump efficiency 13

3.2 Energy rating label 14

3.3 Effects of temperature on efficiency 14

3.4 Impacts of defrost cycle on efficiency 15

4.0 Designing a heat pump system 16

4.1 Steps for designing a heat pump system 16

4.2 The importance of correct heat pump sizing 16

4.3 Step 1: Determine requirements 17

4.4 Step 2: Determine design temperature 19

4.5 Step 3: Calculate heat load requirement 20

4.6 Step 4: Select a system to meet requirements 22

4.7 Step 5: Locate the units 23

5.0 Toolkit 26 6.0 Installing pipework 27

6.1 Pipework installation 27

6.2 Pipework pre-installation in new buildings 32

7.0 Heat pump installation 34

7.1 Pre-installation checklist 34

7.2 Installing the indoor unit 35

7.3 Installing the outdoor unit 38

7.4 Connecting piping to indoor and outdoor units 40

7.5 Leak/pressure test 42

7.6 Evacuation of the system 43

8.0 Refrigerants 45

8.1 Refrigerant charging 46

8.2 Labelling as record of service 46

9.0 Electrical Requirements 47

9.1 Installing electrical wiring 47

9.2 Outdoor unit connections 47

9.3 Nameplate 48

 

10.0 Testing, commissioning and customer operating instructions 49

10.1 Pre-commissioning checks 49 10.2 Electrical checks 49 10.3 Prepare the remote control 49 10.4 Testing the new system 50 10.5 Instructions to the owner 50 10.6 Quality assurance checklist for auditing 53

11.0 Servicing and maintenance 54

11.1 Owner Maintenance 54

11.2 Service person Maintenance 55

12.0 Case Studies 56

12.1 Case 1 – Auckland 57 12.2 Case 2 – Wellington 59 12.3 Case 3 – Dunedin 61





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