Thermostat wiring connections for the Azel i-Link multi-zone switching relay used to control HVAC equipment.

This article gives a table showing the proper wire connections for the Azel i-Link room thermostat used to control heating or air conditioning equipment.

This article series explains the basics of wiring connections at the thermostat for heating, heat pump, or air conditioning systems.

Page top image: an Azel i-Link three zone controller used to control hydronic heating zone circulator pumps.

Azel i-Link Multi-Zone Switching Relay Wiring Details

Azel Technologies is a Canadian heating controller manufacturer that provides installation instructions and wiring diagrams for their controllers, including Excerpting from Azel's i-Link installation instructions given below as a PDF. Excerpting:

The i-Link series multi-zone circulator controller is operated by low voltage thermostats or any other low voltagecontrollers having an SPST switching action.

The i-Link controller provides intermediate switching to permit up to six circulators and a boiler operating control in a multi-zone hydronic heating system.

As an example of use of this relay, when installing a radiant floor heating system that uses a controller, the additional thermostats must be wired to instruct that controller to send heat to their zones.

Azel multi-zone switching relays are sold in five models, differering simply in the number of heating zones to be controlled, as we list here:

• SP-82 2 Zone Switching Relay
• SP-83 3 Zone Switching Relay
• SP-84 4 Zone Switching Relay
• SP-85 5 Zone Switching Relay
• SP-86 6 Zone Switching Relay

Contact Azel Technologies

• Azel Technologies Inc., P.O. Box 53138 10 Royal Orchard Blvd. Thornhill, Ontario, Canada L3T 7R9 Ph: 905-223-5567 Fax: 905-223-3778 Email: info@azeltec.com, Website: www.azeltec.com.
• ZEL i-LINK SP82/83.84/85/86 INSTALLATION & OPERATING INSTRUCTIONS [PDF] that include detailed installation and wiring procedures and connections. We'll include an example below.

...

Notes to the table above

• Source: AZEL i-LINK SP82/83.84/85/86 INSTALLATION & OPERATING INSTRUCTIONS [PDF] where you will find complete installation details for your Azel i-Link relay control

Example wiring details from the instructions above.

Watch out: this example is for a cold start (low thermal mass) boiler application. Your requirements and equipment may differ - see the instructions.

Excerpt: Operation:

When zone thermostat calls for heat, the appropriate circulator is actuated and the isolated end switch X-X will start the boiler. A system circulator is also actuated if it is installed.

Excerpt: Jumper Placement:

The jumper (factory installed) should be placed between terminal ZC and ZR. Connect isolated end switch X-X to T-T terminals on boiler control.

...

---

---

ADVERTISEMENT

---

---

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs

3-zone radiant heat: Honeywell RHT2300B thermostat can't talk to Azel i-Link SP83 zone controller

I am installing a 3 zone in-floor radiant system in my home

Every thing is going well so far, except I am running into an issue where Honeywell (my T-Stat manufacture) is telling me my RHT2300B t-stat cannot be used with my in-floor zone controller (Azel i-Link sp-83) when I call their tech support hotline.

They cannot tell me why or what their letter designations mean.

I am an industrial controls electrician of 23 years, who I must confess, does not have much experience with HVAC.

All I need is a simple t-stat that sends voltage (24vac) when heat is called for to my controller and opens back up (back to zero volts) when the set-point is achieved.

I am having a hard time believing that this t-stat is not capable of doing that. Can any one help?
Eric - Eric 9/9/11

Reply: get the thermostat and controller product numbers correct and it's easy to find wiring instructions

Eric,

I found two important details in researching your question:

1. you gave me an in-valid Honeywell thermostat number, but I was able to guess at the correct one and easily obtain wiring instructions from Honeywell. Correctly your thermostat is the Honeywell 5-2 Day Programmable Thermostat - RTH2300B1012

2. For the Honeywell thermostat model that you mention, correctly named, Honeywell's instructions point out that

The [Honeywell 5-2 Day Programmable Thermostat - RTH2300B1012] thermostat cannot be used if your old thermostat had [and used] any two of the following wires: R, RC, RH, 4 and V.[5]

Call back and ask for senior service tech or service manager.

So if, when you spoke with the Honeywell service technician, and if your old thermostat included and used any two of the wire labels I quote above, then indeed, even if s/he couldn't explain why, indeed you cannot use this thermostat model for your application.

Wiring details for the Honeywell 5-2 Day Programmable thermostat are found

at HONEYWELL THERMOSTAT WIRING GUIDES

 

Help Replacing a round Honeywell T87 with a Digital Honeywell Thermostat

Hello - I am replacing a round Honeywell thermostat with a non-programmable digital Honeywell unit. I have a hot water system with multiple zones and with no air conditioning.

There are three wires at the thermostat. On the old round unit the red wire went to the R terminal, the white wire went to the w terminal and a green wire went to B terminal.

I hooked up the new stat the same way but it would not work. If I selected "fan on" instead of "fan auto" the zone would heat up but would not shut off (hot water kept flowing even if I selected a temp below room temp). Appreciate your help. - Patrick - 1/20/12

Reply:

Patrick, typically the three wire thermostat hookups would be exactly the same for the old and new thermostats.

For details of wiring a typical and simple digital Honeywell thermostat,

see HONEYWELL 5-2 DAY PROGRAMMABLE THERMOSTAT - RTH2300B1012.

For help in understanding the wiring of your old thermostat,

see THREE-WIRE HONEYWELL WALL T87-F TYPE THERMOSTAT WIRING and also

see GENERIC HVAC THERMOSTAT CONTROL WIRING POINTS

 

Help wiring a digital replacement for an old mercury thermostat

I am replacing an old mercury thermostat with a digital. my system is a heat pump. My neighbor gave me an Azel digital thermostat but there are no instructions, not even a box.

I'm trying to decide if this is even a heat pump compatible thermostat. on the therm it has c, g, rc, rh (which are linked by a black wire.)

w, y, b, and o. coming out of my wall is, white connected on old therm w2, yellow connected to y, green conn g, black conn e, red to r, blue to b and bro to x. any help would be great. - Kurt 6/4/12

Reply:

Kurt, For help in understanding the wiring of your old thermostat,

see THREE-WIRE HONEYWELL WALL T87-F TYPE THERMOSTAT WIRING and also

see GENERIC HVAC THERMOSTAT CONTROL WIRING POINTS

Many thermostat wiring setups are straightforward or "cookbook" but why not find the brand name on your thermostat and then you can obtain the installation instructions right from the manufacturer?

Also, Honeywell's thermostat replacement advice (and most likely that of all thermostat manufacturers) warns:

Watch out: MERCURY NOTICE: Do not put your old thermostat in the trash if it contains mercury in a sealed tube. Contact your local waste management authority for instructions regarding recycling and proper disposal.[5]

...

Continue reading at THERMOSTAT INSTALLATION STEPS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Suggested citation for this web page

THERMOSTAT WIRING AZEL i-LINK at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

Or see this

INDEX to RELATED ARTICLES: ARTICLE INDEX to HVAC THERMOSTATS

Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia

Ask a Question or Search InspectApedia

Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly.

Note: appearance of your Comment below may be delayed: if your comment contains an image, photograph, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. Apologies for the delay.

Only one image can be added per comment but you can post as many comments, and therefore images, as you like.
You will not receive a notification when a response to your question has been posted.
Please bookmark this page to make it easy for you to check back for our response.

---

 

IF above you see "Comment Form is loading comments..." then COMMENT BOX - countable.ca / bawkbox.com IS NOT WORKING.

In any case you are welcome to send an email directly to us at InspectApedia.com at editor@inspectApedia.com

We'll reply to you directly. Please help us help you by noting, in your email, the URL of the InspectApedia page where you wanted to comment.

Citations & References

In addition to any citations in the article above, a full list is available on request.

---

ADVERTISEMENT

---